Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-37-48
A. I. Filippov, M. A. Zelenova, O. V. Akhmetova, T.M. Levina, R.G. Gubajdullin
The article considers the problem of pressure fields in a system consisting of two perforated reservoirs penetrated by one well, providing a hydrodynamic connection between them. One-dimensional equations of piezoconductivity in radial geometry are used to describe the pressure fields in the reservoirs. The hydrodynamic connection between the layers through the well is given by an integro-differential equation obtained on the basis of mass balance and Darcy's law.It is assumed that there are no pressure disturbances at the initial moment of time and in the parts of the reservoirs remote from the well. At the boundaries between the well and the reservoirs for the time t>0, the conditions for equal pressures are set. Exact analytical solutions describing pressure fields in reservoirs and wells are constructed in the Laplace–Carson image space. Computational experiments for modeling pressure fields and flows were carried out using the Stehfestand den Iseger algorithms, which made it possible to eliminate the time-consuming procedure of transition to the original space. The joint use of these algorithms made it possible to increase the reliability and accuracy of the results of field calculations, since direct control based on analytical formulas in the originals is difficult. The purpose of computational experiments is to determine the conditions for the existence of interlayer cross flows and their temporal dynamics in the absence of production from the well. Calculations are made for the case when reservoir characteristics of reservoirs are the same. For definiteness, it is assumed that the reservoir, which occurs at a shallower depth, is high-pressure. It is shown that in the absence of production from the well, after some time, an equilibrium pressure that changes slightly with time is established in the wellbore, equal to the average hydrostatic pressure of the lower and upper reservoirs. At the same time, in the region of short times, the flow rate of each reservoir depends on the value of the initial hydrostatic pressure in the well, and in the region of long times, this pressure does not affect the dynamics of interlayer flows. It has been established that the total flow rate of reservoirs is equal to zero only for times longer than the relaxation time. It is noted that the pressure relaxation time in the well increases with a decrease in reservoir permeability.
本文考虑了由一口井穿过的两个射孔油藏组成的系统的压力场问题，并提供了它们之间的流体动力学连接。采用径向几何的一维压电性方程来描述储层的压力场。根据质量平衡和达西定律，给出了井中各层之间的水动力联系。假定在初始时刻和离井较远的油藏部分不存在压力扰动。当t>0时，在井与储层交界处设置等压条件。在Laplace-Carson图像空间中构造了描述油藏和井中压力场的精确解析解。采用Stehfestand den Iseger算法进行了压力场和流动建模的计算实验，该算法可以消除向原始空间过渡的耗时过程。联合使用这些算法可以提高现场计算结果的可靠性和准确性，因为很难根据原始的分析公式进行直接控制。计算实验的目的是确定在油井不生产的情况下层间交叉流存在的条件及其时间动态。对储层特征相同的情况进行了计算。为了确定起见，假定储层位于较浅的深度，是高压的。结果表明，在油井不生产的情况下，一段时间后，井筒内会形成一个平衡压力，该平衡压力随时间的变化略有变化，等于上下储层的平均静水压力。同时，在短时间内，各储层的流量取决于井内初始静水压力的大小，在长时间内，该压力不影响层间流动的动态。已经确定，只有在松弛时间的几倍以上，水库的总流量才等于零。井内压力松弛时间随储层渗透率的降低而增加。
{"title":"CROSS FLOW IN THE WELL","authors":"A. I. Filippov, M. A. Zelenova, O. V. Akhmetova, T.M. Levina, R.G. Gubajdullin","doi":"10.17122/ngdelo-2023-3-37-48","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-37-48","url":null,"abstract":"The article considers the problem of pressure fields in a system consisting of two perforated reservoirs penetrated by one well, providing a hydrodynamic connection between them. One-dimensional equations of piezoconductivity in radial geometry are used to describe the pressure fields in the reservoirs. The hydrodynamic connection between the layers through the well is given by an integro-differential equation obtained on the basis of mass balance and Darcy's law.It is assumed that there are no pressure disturbances at the initial moment of time and in the parts of the reservoirs remote from the well. At the boundaries between the well and the reservoirs for the time t>0, the conditions for equal pressures are set. Exact analytical solutions describing pressure fields in reservoirs and wells are constructed in the Laplace–Carson image space. Computational experiments for modeling pressure fields and flows were carried out using the Stehfestand den Iseger algorithms, which made it possible to eliminate the time-consuming procedure of transition to the original space. The joint use of these algorithms made it possible to increase the reliability and accuracy of the results of field calculations, since direct control based on analytical formulas in the originals is difficult. \u0000The purpose of computational experiments is to determine the conditions for the existence of interlayer cross flows and their temporal dynamics in the absence of production from the well. Calculations are made for the case when reservoir characteristics of reservoirs are the same. For definiteness, it is assumed that the reservoir, which occurs at a shallower depth, is high-pressure. It is shown that in the absence of production from the well, after some time, an equilibrium pressure that changes slightly with time is established in the wellbore, equal to the average hydrostatic pressure of the lower and upper reservoirs. At the same time, in the region of short times, the flow rate of each reservoir depends on the value of the initial hydrostatic pressure in the well, and in the region of long times, this pressure does not affect the dynamics of interlayer flows. It has been established that the total flow rate of reservoirs is equal to zero only for times longer than the relaxation time. It is noted that the pressure relaxation time in the well increases with a decrease in reservoir permeability.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"20 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85602356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-72-78
N.M. Romashov, V.D. Blech, Y.A. Nikiforov, A.K. Petrov
This article raises the issue of development of deposits whose formations are composed of carbonate rocks. The low porosity and permeability of carbonate strata result in low oil production from these reservoirs. Therefore, these fields need to use enhanced recovery methods. A number of methods that have been relevant in the past do not achieve the desired result, so it is necessary to study in more detail new methods for increasing oil recovery. This paper discusses one of these methods for optimizing production, namely injection of carbon dioxide into the formation in order to increase the oil production of the formations. As you know, when injecting gas into the formation, in particular carbon dioxide, there are two main modes of oil displacement: the immiscible displacement mode, in which the gas is in a gaseous form and acts as a displacing agent, and the mixed displacement mode, in which the gas dissolves in oil, changes its properties, contributing to improving the conditions of its displacement. In the course of the work, a comparison of mixed and unmixed injection of carbon dioxide into the formation was made. The dissolution of the gas in the oil occurs at a certain pressure, which is called the miscibility pressure. During the work, the main factors affecting the mixing pressure were identified. The analysis of the effectiveness of the method was carried out by using a digital model. It was found that with mixed carbon dioxide injection, the recovery factor is greater. Shows the impact of carbon dioxide on the reservoir and reservoir fluid during injection. It has been established that carbon dioxide is capable of chemical reactions with rock. These chemical reactions have both positive and negative effects, increasing or decreasing porosity and permeability factors of the formations. The most optimal method of carbon dioxide injection has been determined. The dependence was obtained to determine the efficiency factor of oil production during carbon dioxide injection.
{"title":"ANALYSIS OF THE EFFICIENCY OF CARBON DIOXIDE INJECTION INTO CARBONATE FORMATIONS","authors":"N.M. Romashov, V.D. Blech, Y.A. Nikiforov, A.K. Petrov","doi":"10.17122/ngdelo-2023-3-72-78","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-72-78","url":null,"abstract":"This article raises the issue of development of deposits whose formations are composed of carbonate rocks. The low porosity and permeability of carbonate strata result in low oil production from these reservoirs. Therefore, these fields need to use enhanced recovery methods. A number of methods that have been relevant in the past do not achieve the desired result, so it is necessary to study in more detail new methods for increasing oil recovery. This paper discusses one of these methods for optimizing production, namely injection of carbon dioxide into the formation in order to increase the oil production of the formations. As you know, when injecting gas into the formation, in particular carbon dioxide, there are two main modes of oil displacement: the immiscible displacement mode, in which the gas is in a gaseous form and acts as a displacing agent, and the mixed displacement mode, in which the gas dissolves in oil, changes its properties, contributing to improving the conditions of its displacement. In the course of the work, a comparison of mixed and unmixed injection of carbon dioxide into the formation was made. The dissolution of the gas in the oil occurs at a certain pressure, which is called the miscibility pressure. During the work, the main factors affecting the mixing pressure were identified. The analysis of the effectiveness of the method was carried out by using a digital model. It was found that with mixed carbon dioxide injection, the recovery factor is greater. Shows the impact of carbon dioxide on the reservoir and reservoir fluid during injection. It has been established that carbon dioxide is capable of chemical reactions with rock. These chemical reactions have both positive and negative effects, increasing or decreasing porosity and permeability factors of the formations. The most optimal method of carbon dioxide injection has been determined. The dependence was obtained to determine the efficiency factor of oil production during carbon dioxide injection.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"39 3 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80849141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-17-26
A. Telin, A.A. Politov, A.V. Kornilov, L. Lenchenkova, R. Yakubov, R.M. Safuanova
Water shutoff in oil wells operated in naturally fractured reservoirs is one of the most complex types of geological and technical operations in the oil industry related to repair and insulation works, the success rate of which does not exceed 35–60 %. In order to increase the efficiency of such operations, a set of sealing compositions based on the processing of natural materials, such as sand, peat, rice husk is proposed. Using the methods of mechanochemical activation, it was possible to dissolve sand in a low-concentrated alkali and obtain a sealing compound reinforced with undissolved sand particles by gelating the resulting sodium silicate. When combining mechanically activated sand and peat, a hybrid sealing material with the ultimate shear stress 27.7±1.2 Pa was obtained. The same approach made it possible to activate rice husks containing up to 20 % biogenic silicon dioxide and obtain a hybrid sealing material with the ultimate shear stress of 16.2 ± 0.6 Pa. This makes it possible to consider materials from natural and plant-renewable raw materials very promising for repair and insulation work.
{"title":"PROCESSING OF NATURAL RENEWABLE MATERIALS INTO GROUTING COMPOUNDS FOR WATER SHUTOFF IN OIL WELLS","authors":"A. Telin, A.A. Politov, A.V. Kornilov, L. Lenchenkova, R. Yakubov, R.M. Safuanova","doi":"10.17122/ngdelo-2023-3-17-26","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-17-26","url":null,"abstract":"Water shutoff in oil wells operated in naturally fractured reservoirs is one of the most complex types of geological and technical operations in the oil industry related to repair and insulation works, the success rate of which does not exceed 35–60 %. In order to increase the efficiency of such operations, a set of sealing compositions based on the processing of natural materials, such as sand, peat, rice husk is proposed. Using the methods of mechanochemical activation, it was possible to dissolve sand in a low-concentrated alkali and obtain a sealing compound reinforced with undissolved sand particles by gelating the resulting sodium silicate. When combining mechanically activated sand and peat, a hybrid sealing material with the ultimate shear stress 27.7±1.2 Pa was obtained. The same approach made it possible to activate rice husks containing up to 20 % biogenic silicon dioxide and obtain a hybrid sealing material with the ultimate shear stress of 16.2 ± 0.6 Pa. This makes it possible to consider materials from natural and plant-renewable raw materials very promising for repair and insulation work.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"22 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77547538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-161-168
V. E. Tkacheva, A.N. Markin
The article describes stress corrosion cracking (SCC) of pipe string elements associated with exposure to carbon dioxide. SCC can occur in solutions containing H2S, CO2, ammonia, nitrates, chlorides, acids, alkalis, etc. The article shows two typical examples of stress corrosion cracking of high-carbon steels of tubular string elements (grades 40X13, 40XH) after operation in field environments whose well products do not contain hydrogen sulfide. The possible mechanism of carbon dioxide stress cracking was analyzed in comparison with carbonate stress corrosion cracking (Carbonate Stress Corrosion Cracking) described in the API 571-2020 standard. It is shown that an integral part of the mechanism of carbon dioxide stress cracking is the growth and development of cracks during hydrogen evolution in the cathodic reaction. The general metallurgical and operational characteristics of steel elements of tubular strings subjected to carbon dioxide stress cracking are given, which are in good agreement with the available foreign literature data. Based on the results of operation, it was confirmed that in «conventional» oilfield systems with carbon dioxide, equipment failures by the mechanism of carbon dioxide stress cracking are possible. Examination of the described failures included the following assessment methods: analysis of the accompanying documentation, visual-measuring control, micro-examinations by light microscopy and scanning electron microscopy, tests to determine the mechanical properties of the metal.Carbon dioxide stress cracking was observed in the presence of the following factors: carbon dioxide environment (in the absence of hydrogen sulfide); high concentration of carbon in steel (0.4 % wt.); increased hardness of steel (from 30.3 to 33.9 HRC); the presence of constant and alternating mechanical loads.
{"title":"CARBON DIOXIDE STRESS CRACKING IN OIL PRODUCTION","authors":"V. E. Tkacheva, A.N. Markin","doi":"10.17122/ngdelo-2023-3-161-168","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-161-168","url":null,"abstract":"The article describes stress corrosion cracking (SCC) of pipe string elements associated with exposure to carbon dioxide. SCC can occur in solutions containing H2S, CO2, ammonia, nitrates, chlorides, acids, alkalis, etc. The article shows two typical examples of stress corrosion cracking of high-carbon steels of tubular string elements (grades 40X13, 40XH) after operation in field environments whose well products do not contain hydrogen sulfide. The possible mechanism of carbon dioxide stress cracking was analyzed in comparison with carbonate stress corrosion cracking (Carbonate Stress Corrosion Cracking) described in the API 571-2020 standard. It is shown that an integral part of the mechanism of carbon dioxide stress cracking is the growth and development of cracks during hydrogen evolution in the cathodic reaction. The general metallurgical and operational characteristics of steel elements of tubular strings subjected to carbon dioxide stress cracking are given, which are in good agreement with the available foreign literature data. Based on the results of operation, it was confirmed that in «conventional» oilfield systems with carbon dioxide, equipment failures by the mechanism of carbon dioxide stress cracking are possible. Examination of the described failures included the following assessment methods: analysis of the accompanying documentation, visual-measuring control, micro-examinations by light microscopy and scanning electron microscopy, tests to determine the mechanical properties of the metal.Carbon dioxide stress cracking was observed in the presence of the following factors: carbon dioxide environment (in the absence of hydrogen sulfide); high concentration of carbon in steel (0.4 % wt.); increased hardness of steel (from 30.3 to 33.9 HRC); the presence of constant and alternating mechanical loads.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"1 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81544738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-88-95
R. Akchurin, A. Ramazanov, R. Valiullin, I. Nizaeva
The paper presents the results of studies in the well conducted specifically for testing the technique of restoring the equilibrium temperature of rocks by measured transient temperature distributions in the well. The technique is based on numerical simulation of heat exchange processes during flushing of a long-idle well and subsequent solution of the inverse problem. A depth temperature measurement was carried out in an idle well (geothermal distribution) and a series of depth temperature measurements were carried out immediately after washing after 3, 6, 9 and 12 hours. After the experiment, numerical simulation of the temperature recovery process after flushing was carried out. To do this, a simulator was developed that takes into account the thermophysical properties of rocks and mudliquid, the design of the well, as well as the history of the well. Based on the developed simulator, it is proposed to implement a solution to the inverse problem of determining the equilibrium temperature of rocks from the measured non-stationary distributions after its perturbation. As shown in the paper, the developed algorithm makes it possible to determine not only the geothermal temperature distribution, but also the flow rate of the mud liquid in the borehole during the flushing process.
{"title":"SIMULATION OF THERMAL STUDIES IN A WELL ON THE SIMULATOR DRILLSIM","authors":"R. Akchurin, A. Ramazanov, R. Valiullin, I. Nizaeva","doi":"10.17122/ngdelo-2023-3-88-95","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-88-95","url":null,"abstract":"The paper presents the results of studies in the well conducted specifically for testing the technique of restoring the equilibrium temperature of rocks by measured transient temperature distributions in the well. The technique is based on numerical simulation of heat exchange processes during flushing of a long-idle well and subsequent solution of the inverse problem. A depth temperature measurement was carried out in an idle well (geothermal distribution) and a series of depth temperature measurements were carried out immediately after washing after 3, 6, 9 and 12 hours. After the experiment, numerical simulation of the temperature recovery process after flushing was carried out. To do this, a simulator was developed that takes into account the thermophysical properties of rocks and mudliquid, the design of the well, as well as the history of the well. Based on the developed simulator, it is proposed to implement a solution to the inverse problem of determining the equilibrium temperature of rocks from the measured non-stationary distributions after its perturbation. As shown in the paper, the developed algorithm makes it possible to determine not only the geothermal temperature distribution, but also the flow rate of the mud liquid in the borehole during the flushing process.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"55 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83880736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-133-148
Виктор Владимирович Носов, Олег Геннадьевич Первейталов, Viktor V. Nosov, Oleg G. Perveitalov
The article provides an example of the implementation of fatigue life calculation, which uses a multi-level acoustic emission model to obtain the parameters included in the equation of the kinetic concept of strength. Using the data obtained during acoustic emission tests for crack resistance of titanium alloy samples PT-3V at three temperature levels: 293, 77 and 4 K, concentration-kinetic indices of XAE strength and YAE were calculated, which carry information about the unique nature of damage accumulation for this object in the form of a structural γ coefficient included in the Zhurkovthermoeluktuation equation. These parameters were selected from the deformation sites of the samples, which, according to the results of microstructural analysis, showed the presence of many microcracks with different directions of propagation, which were associated with the accumulation of destructive damage in the elastoplastic region. The obtained kinetic parameters: the energy of activation of U0 destruction and the γ parameter were used to estimate the fatigue life of the samples using a formula that takes into account the sinusoidal change in stresses during cyclic loading and is also based on the kinetic concept of strength. Taking into account the changes in temperature in the cycle due to the thermoelastic effect, it was possible to obtain fatigue curves similar to those obtained for the titanium alloy at the same temperatures. Fatigue curves of similar properties of titanium alloy destroyed by cyclic loading at the same temperatures were used for comparison. It has been proved that the slope of fatigue curves, as an individual characteristic of the material, is determined by the concentration-kinetic values of XAE and YAE obtained during static tests.
{"title":"CONSIDERATION OF THE EFFECT OF CRYOGENIC TEMPERATURES ON THE FATIGUE OF RESOURCED ALLOYS BY MEANS OF ACOUSTIC EMISSION","authors":"Виктор Владимирович Носов, Олег Геннадьевич Первейталов, Viktor V. Nosov, Oleg G. Perveitalov","doi":"10.17122/ngdelo-2023-3-133-148","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-133-148","url":null,"abstract":"The article provides an example of the implementation of fatigue life calculation, which uses a multi-level acoustic emission model to obtain the parameters included in the equation of the kinetic concept of strength. Using the data obtained during acoustic emission tests for crack resistance of titanium alloy samples PT-3V at three temperature levels: 293, 77 and 4 K, concentration-kinetic indices of XAE strength and YAE were calculated, which carry information about the unique nature of damage accumulation for this object in the form of a structural γ coefficient included in the Zhurkovthermoeluktuation equation. These parameters were selected from the deformation sites of the samples, which, according to the results of microstructural analysis, showed the presence of many microcracks with different directions of propagation, which were associated with the accumulation of destructive damage in the elastoplastic region. The obtained kinetic parameters: the energy of activation of U0 destruction and the γ parameter were used to estimate the fatigue life of the samples using a formula that takes into account the sinusoidal change in stresses during cyclic loading and is also based on the kinetic concept of strength. Taking into account the changes in temperature in the cycle due to the thermoelastic effect, it was possible to obtain fatigue curves similar to those obtained for the titanium alloy at the same temperatures. Fatigue curves of similar properties of titanium alloy destroyed by cyclic loading at the same temperatures were used for comparison. It has been proved that the slope of fatigue curves, as an individual characteristic of the material, is determined by the concentration-kinetic values of XAE and YAE obtained during static tests.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"24 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88775566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-149-160
M. Bogatov, P. Yudin, A.P. Amosov
Along with the corrosive effect on downhole equipment, including pumping and compressor pipes (tubing), one of the main complicating factors in oil production is the formation of asphalt-resin-paraffin deposits (ARPDs) on the inner surface of the tubing. As in the case of corrosion protection, among the various methods of preventing the formation of ARPDs, the use of appropriate protective coatings has the greatest potential and is a valuable method because of its simplicity, efficiency and durability. At the same time, the use of manufactured anticorrosive coatings, that is, in essence, multifunctional protective coatings, is especially attractive for protection against ARPDs. But for this it is necessary to know the ability of existing multifunctional coatings to prevent the formation of ARPDs, to be able to correctly determine this ability. This article presents the results of research on the influence of the properties of the internal multifunctional coatings of tubing on the formation of ARPDs from the oil environment. At the same time, both the previously obtained results on the influence of coating properties determined in static conditions of absence or stationary oil medium (roughness, adhesion of paraffin to dry coating, edge angles of wetting with distilled water in air and oil in an aqueous medium) and new results on the study of the effectiveness of the use of internal functional coatings to protect tubing from formation of ARPDs in dynamic conditions of a moving oil medium (influence of the temperature gradient, the flow rate and duration of the coating in the oil environment) using laboratory circulation stands developed with the participation of the authors of the article, which allow modeling the processes of ASF deposition on the inner surface of the tubing in conditions closest to borehole conditions, are considered. Three commercially available internal coatings on tubing for corrosion protection and ARPDs are considered: a silicate-enamel coating of the MK-5 brand and filled polymer coatings of the MPLAG 17 and GIOTEK 110 M brands based on epoxyphenolic polymers. It is shown that testing on the developed laboratory circulation stands allows the most reliable assessment of the ability of internal multifunctional coatings to protect tubing from the formation of ARPDs in borehole conditions.
{"title":"THE USE OF INTERNALMULTIFUNCTIONAL COATINGS FOR PUMP AND COMPRESSOR PIPES TO PROTECT AGAINST THE FORMATION OF ASPHALT, RESIN AND PARAFFIN DEPOSITS","authors":"M. Bogatov, P. Yudin, A.P. Amosov","doi":"10.17122/ngdelo-2023-3-149-160","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-149-160","url":null,"abstract":"Along with the corrosive effect on downhole equipment, including pumping and compressor pipes (tubing), one of the main complicating factors in oil production is the formation of asphalt-resin-paraffin deposits (ARPDs) on the inner surface of the tubing. As in the case of corrosion protection, among the various methods of preventing the formation of ARPDs, the use of appropriate protective coatings has the greatest potential and is a valuable method because of its simplicity, efficiency and durability. At the same time, the use of manufactured anticorrosive coatings, that is, in essence, multifunctional protective coatings, is especially attractive for protection against ARPDs. But for this it is necessary to know the ability of existing multifunctional coatings to prevent the formation of ARPDs, to be able to correctly determine this ability. This article presents the results of research on the influence of the properties of the internal multifunctional coatings of tubing on the formation of ARPDs from the oil environment. At the same time, both the previously obtained results on the influence of coating properties determined in static conditions of absence or stationary oil medium (roughness, adhesion of paraffin to dry coating, edge angles of wetting with distilled water in air and oil in an aqueous medium) and new results on the study of the effectiveness of the use of internal functional coatings to protect tubing from formation of ARPDs in dynamic conditions of a moving oil medium (influence of the temperature gradient, the flow rate and duration of the coating in the oil environment) using laboratory circulation stands developed with the participation of the authors of the article, which allow modeling the processes of ASF deposition on the inner surface of the tubing in conditions closest to borehole conditions, are considered. Three commercially available internal coatings on tubing for corrosion protection and ARPDs are considered: a silicate-enamel coating of the MK-5 brand and filled polymer coatings of the MPLAG 17 and GIOTEK 110 M brands based on epoxyphenolic polymers. It is shown that testing on the developed laboratory circulation stands allows the most reliable assessment of the ability of internal multifunctional coatings to protect tubing from the formation of ARPDs in borehole conditions.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"52 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88847534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-210-219
G. Z. Nizamova, M. Gayfullina
Since the activity of industrial enterprises is influenced by many factors, it becomes necessary to assess this influence by methods of statistical analysis and economic and mathematical modeling. To take into account the many factors that affect the activities of chemical companies, it is advisable to use the methods of multiple correlation and regression analysis, which allows us to evaluate not only internal and external causeand-effect relationships, but also to study the development features and trends in the development of chemical companies and the resulting attribute. When constructing a correlation-regression model, the following requirements were met in the work: required number of factors that have a quantitative assessment for the analyzed market has a monthly distribution for January. 2019-Oct.2020; a sufficient amount of factor signs (the number of observations is almost 3 times higher than the number of factors); the totality of the studied factor characteristics is homogeneous. The purpose of this article is to develop a methodological approach to assessing the factors of production of chemical products. The article presents a step-by-step description of the algorithm, with the help of which it is proposed to evaluate the factors influencing the performance of chemical products. The following stages of the algorithm for assessing the factors of production of chemical products are identified: the formation of an information base for the study, the construction of a correlation matrix, the compilation of a predictive regression equation, the assessment of the statistical significance of the parameters of the obtained regression equation, and the development of proposals for achieving the predictive values of the resultant attribute. The research methodology proposed in the article makes it possible to identify factors in the development of specific chemical products, as well as to predict key indicators that affect the production of products. The practical significance of the study lies in the fact that the considered approach to forecasting the development of the market for chemical products makes it possible to determine the specific values of quantitative indicators that affect the volume of production of a particular type of chemical product. Approbation of the proposed approach was carried out on the example of the carbon dioxide (carbon dioxide) market. The results obtained confirm that the constructed model can be used to analyze and predict the main performance indicators of chemical companies.
{"title":"METHODOLOGICAL APPROACH TO THE ASSESSMENT OF FACTORS OF CHEMICAL PRODUCTION (ON THE EXAMPLE OF THE CARBON DIOXIDE MARKET)","authors":"G. Z. Nizamova, M. Gayfullina","doi":"10.17122/ngdelo-2023-3-210-219","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-210-219","url":null,"abstract":"Since the activity of industrial enterprises is influenced by many factors, it becomes necessary to assess this influence by methods of statistical analysis and economic and mathematical modeling. To take into account the many factors that affect the activities of chemical companies, it is advisable to use the methods of multiple correlation and regression analysis, which allows us to evaluate not only internal and external causeand-effect relationships, but also to study the development features and trends in the development of chemical companies and the resulting attribute. When constructing a correlation-regression model, the following requirements were met in the work: required number of factors that have a quantitative assessment for the analyzed market has a monthly distribution for January. 2019-Oct.2020; a sufficient amount of factor signs (the number of observations is almost 3 times higher than the number of factors); the totality of the studied factor characteristics is homogeneous. The purpose of this article is to develop a methodological approach to assessing the factors of production of chemical products. The article presents a step-by-step description of the algorithm, with the help of which it is proposed to evaluate the factors influencing the performance of chemical products. The following stages of the algorithm for assessing the factors of production of chemical products are identified: the formation of an information base for the study, the construction of a correlation matrix, the compilation of a predictive regression equation, the assessment of the statistical significance of the parameters of the obtained regression equation, and the development of proposals for achieving the predictive values of the resultant attribute. The research methodology proposed in the article makes it possible to identify factors in the development of specific chemical products, as well as to predict key indicators that affect the production of products. The practical significance of the study lies in the fact that the considered approach to forecasting the development of the market for chemical products makes it possible to determine the specific values of quantitative indicators that affect the volume of production of a particular type of chemical product. Approbation of the proposed approach was carried out on the example of the carbon dioxide (carbon dioxide) market. The results obtained confirm that the constructed model can be used to analyze and predict the main performance indicators of chemical companies.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"57 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76015350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-103-112
A.M. Tsarev, L. N. Ikonnikova
The utilization level of associated petroleum gas in Russia and in the world is gradually increasing, due to introduction of legislative restrictions and due to realization of the high value of associated petroleum gas as a raw material and energy carrier. At the same time, the usage of dissolved gas is geographically heterogeneous and depends on many factors, including the stage of field development, the subsoil user, and others. The need to increase the level of rational usage of dissolved gas is facing complications in the implementation of relevant projects. The reason lies in the lack of a method for substantiated selection of the most efficient method of utilization in the absence of datum in the early stages of field development; high risks at high capital costs, which is especially noticeable for fields in the later stages. The state and subsoil users are interested in creating a unified and objective methodology for selecting the optimal method of associated gas utilization, which, in turn, should ensure the coordination of actions between the government and the oil and gas industry in achieving high efficiency in the development of oil fields and increasing the level of associated petroleum gas disposal. At the moment, there is no such a method, but a number of publications have been devoted to solving this problem. The article will outline the main stages and aspects of author’s work on the development of screening criteria tables of disposal methods and methodology for selecting the optimal option for the rational usage of dissolved gas. The work was carried out based on the results of studying the experience of implementing various technologies and the identified limiting factors and was proceeded using the methods of multi-criteria analysis (hierarchical method).
{"title":"METHODOLOGY FOR SELECTING A PROCESS OF ASSOCIATED PETROLEUM GAS UTILIZATION","authors":"A.M. Tsarev, L. N. Ikonnikova","doi":"10.17122/ngdelo-2023-3-103-112","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-103-112","url":null,"abstract":"The utilization level of associated petroleum gas in Russia and in the world is gradually increasing, due to introduction of legislative restrictions and due to realization of the high value of associated petroleum gas as a raw material and energy carrier. At the same time, the usage of dissolved gas is geographically heterogeneous and depends on many factors, including the stage of field development, the subsoil user, and others. The need to increase the level of rational usage of dissolved gas is facing complications in the implementation of relevant projects. The reason lies in the lack of a method for substantiated selection of the most efficient method of utilization in the absence of datum in the early stages of field development; high risks at high capital costs, which is especially noticeable for fields in the later stages. \u0000The state and subsoil users are interested in creating a unified and objective methodology for selecting the optimal method of associated gas utilization, which, in turn, should ensure the coordination of actions between the government and the oil and gas industry in achieving high efficiency in the development of oil fields and increasing the level of associated petroleum gas disposal. At the moment, there is no such a method, but a number of publications have been devoted to solving this problem. \u0000The article will outline the main stages and aspects of author’s work on the development of screening criteria tables of disposal methods and methodology for selecting the optimal option for the rational usage of dissolved gas. The work was carried out based on the results of studying the experience of implementing various technologies and the identified limiting factors and was proceeded using the methods of multi-criteria analysis (hierarchical method).","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"181 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73171391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-17DOI: 10.17122/ngdelo-2023-3-188-200
Y. Badin, M. Budaragin, D.I. Dyachenko, A.N. Kiselev, A.Yu. Feytullaev
The article is devoted to the determination of the causes of damage in the form of cracking of flange connections of technological pipelines of a delayed coking unit, for which, when designing pipelines, it becomes necessary to use dissimilar flange connections. The article consistently explores the problem of damage in the form of cracking of dissimilar flange connections, the results of studies of the mechanical properties and metal structure of damaged flange connections are presented. It is concluded that the condition of the metal after prolonged operation is satisfactory and it could not be the cause of damage, the damage is not of the nature of damage due to corrosion effects of various nature. The calculated justification of the occurrence of damage is carried out on the basis of checking the strength conditions for equipment elements with the development of measures to prevent new damage. The results of calculations of the stress-strain state of pipeline elements are presented with justification for the occurrence of damage in the form of cracking of dissimilar flange connections with the existing material design of fasteners, as well as with the proposed change in the material.
{"title":"CAUSES OF CRACKING OF FLANGE JOINTS OF PROCESSING PIPES FOR DELAYED COKING UNITS","authors":"Y. Badin, M. Budaragin, D.I. Dyachenko, A.N. Kiselev, A.Yu. Feytullaev","doi":"10.17122/ngdelo-2023-3-188-200","DOIUrl":"https://doi.org/10.17122/ngdelo-2023-3-188-200","url":null,"abstract":"The article is devoted to the determination of the causes of damage in the form of cracking of flange connections of technological pipelines of a delayed coking unit, for which, when designing pipelines, it becomes necessary to use dissimilar flange connections. The article consistently explores the problem of damage in the form of cracking of dissimilar flange connections, the results of studies of the mechanical properties and metal structure of damaged flange connections are presented. It is concluded that the condition of the metal after prolonged operation is satisfactory and it could not be the cause of damage, the damage is not of the nature of damage due to corrosion effects of various nature. The calculated justification of the occurrence of damage is carried out on the basis of checking the strength conditions for equipment elements with the development of measures to prevent new damage. The results of calculations of the stress-strain state of pipeline elements are presented with justification for the occurrence of damage in the form of cracking of dissimilar flange connections with the existing material design of fasteners, as well as with the proposed change in the material.","PeriodicalId":9748,"journal":{"name":"Chemical and Petroleum Engineering","volume":"48 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85029203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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