Pub Date : 2023-07-14DOI: 10.31660/0445-0108-2023-2-35-54
Yu. E. Katanov, A. I. Aristov, A. K. Yagafarov, O. D. Novruzov
The algorithm of analog-to-digital conversion of primary geological and geophysical information (on the example of identification of rock lithotypes based on the text description of the physical core) is presented.As part of the work, a combination of three types of scientific research - prospecting, interdisciplinary and applied, in the formation of the initial base of qualitative data is implemented.Common algorithms for textual information classification and mechanism of initial data preprocessing using tokenization are described.The concept of text pattern recognition is implemented using artificial intelligence methods.For creation of the neural network model of textual geological and geophysical information recognition the Python programming language is used in combination with the convolutional neural network technologies for text classification (TextCNN), bi-directional long-shortterm memory networks (BiLSTM) and bi-directional coder representation networks (BERT).The stack of these technologies and the Python programming language, after developing and testing the basic version of the neural network model of qualitative information recognition, provided an acceptable level of performance of the algorithm of digital transformation of text data.The best result (the current version of neural network model is 1.0; more than 3000 examples for training and testing) was achieved when using the algorithm of text data recognition based on BERT with an accuracy on the validation network (Validation Accuracy) ~0.830173 (25th epoch), with Validation Loss ~0.244719, with Training Loss ~0.000984 and probability of recognition of the studied rock lithotypes more than 95 %.The mechanisms of code modification for further improvement of textual prediction accuracy based on the created neural network were determined.
{"title":"Digital core: neural network recognition of textual geological and geophysical information","authors":"Yu. E. Katanov, A. I. Aristov, A. K. Yagafarov, O. D. Novruzov","doi":"10.31660/0445-0108-2023-2-35-54","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-2-35-54","url":null,"abstract":"The algorithm of analog-to-digital conversion of primary geological and geophysical information (on the example of identification of rock lithotypes based on the text description of the physical core) is presented.As part of the work, a combination of three types of scientific research - prospecting, interdisciplinary and applied, in the formation of the initial base of qualitative data is implemented.Common algorithms for textual information classification and mechanism of initial data preprocessing using tokenization are described.The concept of text pattern recognition is implemented using artificial intelligence methods.For creation of the neural network model of textual geological and geophysical information recognition the Python programming language is used in combination with the convolutional neural network technologies for text classification (TextCNN), bi-directional long-shortterm memory networks (BiLSTM) and bi-directional coder representation networks (BERT).The stack of these technologies and the Python programming language, after developing and testing the basic version of the neural network model of qualitative information recognition, provided an acceptable level of performance of the algorithm of digital transformation of text data.The best result (the current version of neural network model is 1.0; more than 3000 examples for training and testing) was achieved when using the algorithm of text data recognition based on BERT with an accuracy on the validation network (Validation Accuracy) ~0.830173 (25th epoch), with Validation Loss ~0.244719, with Training Loss ~0.000984 and probability of recognition of the studied rock lithotypes more than 95 %.The mechanisms of code modification for further improvement of textual prediction accuracy based on the created neural network were determined.","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"184 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139359334","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 : 2023-07-14DOI: 10.31660/0445-0108-2023-3-55-67
I. M. Khvorost
In the Izhma-Pechora syneclise, several fields have been discovered that are limited to sand deposits deposits of stream-bed genesis. However, it is difficult to find lithological traps using seismic data due to the complex nature of the distribution of sandy deposits and many discontinuous faults in the Permian terrigenous section. The article attempts to model the continental depositional environment that existed in the Izhma-Pechora syneclise and the Upper Pechora depression conjunction zone during the Ufimsky, Kazansky and Tatar ages of the Permian period. It aims to reconstruct the history of the development of the area and to trace the distribution of alluvial and lacustrine-alluvial sand deposits. DionisosFlow's unique industrial package helps to create a 3-dimensional model of the development of the area, to simulate the process of sedimentation of the target area, and to construct predictive maps of sandstone, siltstone and clay spread. The western part of the modeled area demonstrates the existence of slightly wandering north-easterly directed beds and their small offshoots. The south-eastern part of the area, dated to the Ufimsky age, shows deltaic deposits. The method of predicting the distribution of channel deposits based on sedimentological modeling is supposed to be used for territories uninvestigated by 3D survey. The aim is to locate the source of the reservoir and plan the seismic survey.
{"title":"Modeling of Permian stream-bed deposits in the Izhma-Pechora syneclise and the Upper Pechora depression conjunction zone","authors":"I. M. Khvorost","doi":"10.31660/0445-0108-2023-3-55-67","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-3-55-67","url":null,"abstract":"In the Izhma-Pechora syneclise, several fields have been discovered that are limited to sand deposits deposits of stream-bed genesis. However, it is difficult to find lithological traps using seismic data due to the complex nature of the distribution of sandy deposits and many discontinuous faults in the Permian terrigenous section. The article attempts to model the continental depositional environment that existed in the Izhma-Pechora syneclise and the Upper Pechora depression conjunction zone during the Ufimsky, Kazansky and Tatar ages of the Permian period. It aims to reconstruct the history of the development of the area and to trace the distribution of alluvial and lacustrine-alluvial sand deposits. DionisosFlow's unique industrial package helps to create a 3-dimensional model of the development of the area, to simulate the process of sedimentation of the target area, and to construct predictive maps of sandstone, siltstone and clay spread. The western part of the modeled area demonstrates the existence of slightly wandering north-easterly directed beds and their small offshoots. The south-eastern part of the area, dated to the Ufimsky age, shows deltaic deposits. The method of predicting the distribution of channel deposits based on sedimentological modeling is supposed to be used for territories uninvestigated by 3D survey. The aim is to locate the source of the reservoir and plan the seismic survey.","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"217 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139359506","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 : 2023-07-14DOI: 10.31660/0445-0108-2023-3-11-23
R. Abdrashitova, A. A. Prudchenko, M. A. Kadyrov, M. G. Poluyanov
The aim of the study is to identify the influence of some parameters of the geological environment on the formation of the current hydrogeochemical profile in the Middle Jurassic hydrogeological complex (layers YU2-4) of the Lyaminsky oil and gas field in Western Siberia.The factors controlling the changes in the chemical composition of the groundwater (geotemperatures, influence of neotectonics, etc.) after the process of sedimentation and water accumulation were analysed on the basis of the lithogenetic theory of the transformation of the composition of groundwater during geological evolution. In the course of the research, correlation coefficients were obtained for the value of groundwater mineralisation in the complex with the modern and paleotemperatures of the Tyumen suite, the porosity coefficient and the depth of the foundation. The obtained results allowed assuming that the current hydrogeochemical profile of the Middle Jurassic hydrogeological complex is the result of the consistent action of the whole complex of factors. The results of the analysis showed that the influence of neotectonic processes on the current hydrogeochemical profile is quite probable. The reasons for the heterogeneity of mineralisation, apart from neotectonic processes, may be different, but in any case, the identification of relationships such as "Mineralisation - a parameter of the state of the geological environment" indicates a change in the concentration of salts in groundwater after their accumulation together with sediment.
{"title":"Current hydrogeochemical profile of groundwater in the Middle Jurassic hydrogeological complex of the Lyaminsky oil and gas field","authors":"R. Abdrashitova, A. A. Prudchenko, M. A. Kadyrov, M. G. Poluyanov","doi":"10.31660/0445-0108-2023-3-11-23","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-3-11-23","url":null,"abstract":"The aim of the study is to identify the influence of some parameters of the geological environment on the formation of the current hydrogeochemical profile in the Middle Jurassic hydrogeological complex (layers YU2-4) of the Lyaminsky oil and gas field in Western Siberia.The factors controlling the changes in the chemical composition of the groundwater (geotemperatures, influence of neotectonics, etc.) after the process of sedimentation and water accumulation were analysed on the basis of the lithogenetic theory of the transformation of the composition of groundwater during geological evolution. In the course of the research, correlation coefficients were obtained for the value of groundwater mineralisation in the complex with the modern and paleotemperatures of the Tyumen suite, the porosity coefficient and the depth of the foundation. The obtained results allowed assuming that the current hydrogeochemical profile of the Middle Jurassic hydrogeological complex is the result of the consistent action of the whole complex of factors. The results of the analysis showed that the influence of neotectonic processes on the current hydrogeochemical profile is quite probable. The reasons for the heterogeneity of mineralisation, apart from neotectonic processes, may be different, but in any case, the identification of relationships such as \"Mineralisation - a parameter of the state of the geological environment\" indicates a change in the concentration of salts in groundwater after their accumulation together with sediment.","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139359556","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 : 2023-07-14DOI: 10.31660/0445-0108-2023-3-24-34
Y. Gladysheva
At the current stage of geological exploration, hydrocarbon deposits have been discovered in complex reservoirs that are "unconventional" in nature. In particular, at the Medvezhye field, according to the interpretation of seismic surveys and the drilling of exploratory wells, a gas deposit was discovered in the Senonian deposits of the Nizhneberezovskaya suite of Upper Cretaceous deposits. The gas deposit of the NB formation of the Medvezhye field is characterised by productive reservoirs, mostly represented by mudstones and opoka-like clays. These rocks are characterized by low filtration parameters. Commercial gas inflows from secondary reservoir openings indicate the presence of fractured rock, as confirmed by core testing, mechanical logging. A comprehensive analysis of hydrodynamic studies of field parameters, such as reservoir pressure, drawdown, flow rate, allows calculating the filtration characteristics of a productive formation. The performance of fractured and mixed pore-fractured reservoirs is determined using induction diagrams and pressure recovery curves, the reservoir hydrodynamic model and methods for improving development in complex "unconventional" reservoirs are refined.
{"title":"Productivity of unconventional Senon reservoirs in the north of West Siberia","authors":"Y. Gladysheva","doi":"10.31660/0445-0108-2023-3-24-34","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-3-24-34","url":null,"abstract":"At the current stage of geological exploration, hydrocarbon deposits have been discovered in complex reservoirs that are \"unconventional\" in nature. In particular, at the Medvezhye field, according to the interpretation of seismic surveys and the drilling of exploratory wells, a gas deposit was discovered in the Senonian deposits of the Nizhneberezovskaya suite of Upper Cretaceous deposits. The gas deposit of the NB formation of the Medvezhye field is characterised by productive reservoirs, mostly represented by mudstones and opoka-like clays. These rocks are characterized by low filtration parameters. Commercial gas inflows from secondary reservoir openings indicate the presence of fractured rock, as confirmed by core testing, mechanical logging. A comprehensive analysis of hydrodynamic studies of field parameters, such as reservoir pressure, drawdown, flow rate, allows calculating the filtration characteristics of a productive formation. The performance of fractured and mixed pore-fractured reservoirs is determined using induction diagrams and pressure recovery curves, the reservoir hydrodynamic model and methods for improving development in complex \"unconventional\" reservoirs are refined.","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"216 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139359410","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-60-72
V. Ovchinnikov, O. Rozhkova, D. S. Rozhkova, M. Listak
Thermobaric conditions in oil and gas wells require the use of backfill materials with special physical and chemical properties. Cement composites are subject to the requirements of fluidity (to ensure uninterrupted delivery to the cementing site), timely formation of the necessary mechanical strength (to prevent the interaction between the cement glass and reservoir fluids), corrosion resistance, impermeability and durability. Therefore, the composition of the cement slurry should be selected based on the mining and geological characteristics of the well.Wellbores wall are reinforced with protective pipes, which are attached to the well with cement or cement slurry. It is needed to protect wellbores wall from rock falls, gas, oil and water shows and to isolate productive formations. If this operation is carried out qualitatively, then the outer part of the casing string will be protected from the impact of the formation fluid. Otherwise, pipe corrosion may occur, which can lead to the destruction of the cement stone and, as a result, to accidents.
{"title":"Strength properties and microstructure of Portland slag cement for well casings under the influence of high temperatures","authors":"V. Ovchinnikov, O. Rozhkova, D. S. Rozhkova, M. Listak","doi":"10.31660/0445-0108-2023-1-60-72","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-60-72","url":null,"abstract":"Thermobaric conditions in oil and gas wells require the use of backfill materials with special physical and chemical properties. Cement composites are subject to the requirements of fluidity (to ensure uninterrupted delivery to the cementing site), timely formation of the necessary mechanical strength (to prevent the interaction between the cement glass and reservoir fluids), corrosion resistance, impermeability and durability. Therefore, the composition of the cement slurry should be selected based on the mining and geological characteristics of the well.Wellbores wall are reinforced with protective pipes, which are attached to the well with cement or cement slurry. It is needed to protect wellbores wall from rock falls, gas, oil and water shows and to isolate productive formations. If this operation is carried out qualitatively, then the outer part of the casing string will be protected from the impact of the formation fluid. Otherwise, pipe corrosion may occur, which can lead to the destruction of the cement stone and, as a result, to accidents.","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123809944","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-97-107
N. Mamaeva, S. A. Petrov
Global climate change and its impact on the environment is one of the main problems of the 21st century. In the Arctic zone, where considerable oil and gas reserves are located, warming is 2-3 times faster than the world average. Against the backdrop of increased Arctic warming, thermal pollution has created permanent urban heat islands, where urban temperatures are 1-2 degrees Celsius higher than in surrounding areas. The aim of the article was a geoinformation assessment of climatic and anthropogenic characteristics in various zones of Tyumen (recreational zones (parks and reservoirs) and the zone of urban highways) in the summer of 2021. The Earth program was used in the studies, statistical processing of the results was carried out using the IBM SPSS Statistics 21 software. It has been found that a circadian diurnal rhythm is observed both in recreational areas (parks and reservoirs) and in the area of urban highways (wind speed, temperature and relative humidity, concentration of CO, CO2, SO2, NO2) in the summer of 2021. The revealed correlation relationships between climatic characteristics and anthropogenic pollutants and aerosols indicate that global climate change is associated with the deterioration of the ecological situation in the urban environment and doesn't depend on the landscape features of the city.
{"title":"Application of geoinformation systems in sounding the ecological and economic network of the urban environment in the northern territories","authors":"N. Mamaeva, S. A. Petrov","doi":"10.31660/0445-0108-2023-1-97-107","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-97-107","url":null,"abstract":"Global climate change and its impact on the environment is one of the main problems of the 21st century. In the Arctic zone, where considerable oil and gas reserves are located, warming is 2-3 times faster than the world average. Against the backdrop of increased Arctic warming, thermal pollution has created permanent urban heat islands, where urban temperatures are 1-2 degrees Celsius higher than in surrounding areas. The aim of the article was a geoinformation assessment of climatic and anthropogenic characteristics in various zones of Tyumen (recreational zones (parks and reservoirs) and the zone of urban highways) in the summer of 2021. The Earth program was used in the studies, statistical processing of the results was carried out using the IBM SPSS Statistics 21 software. It has been found that a circadian diurnal rhythm is observed both in recreational areas (parks and reservoirs) and in the area of urban highways (wind speed, temperature and relative humidity, concentration of CO, CO2, SO2, NO2) in the summer of 2021. The revealed correlation relationships between climatic characteristics and anthropogenic pollutants and aerosols indicate that global climate change is associated with the deterioration of the ecological situation in the urban environment and doesn't depend on the landscape features of the city. ","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124058279","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-73-84
A. V. Syundyukov, D. K. Sagitov
The article is devoted to the regularities of the propagation of self-induced hydraulic fracturing cracks in the process of injection of the displacement agent into the formation in order to maintain reservoir pressure. Technogenic and petrological factors have a significant impact on the processes of initiation, propagation and degradation of self-induced hydraulic fracturing cracks. In modern oil and gas field practice, we are just beginning to use geomechanical simulators for private calculations and have not yet used them in integrated calculations of field development options, nevertheless, the influence of geomechanical processes of the spread of man-made cracks makes a significant contribution to the field development indicators. The aim of the study is a complex of factors that prevent and contribute to the development of self-induced hydraulic fracturing cracks. The study uses the author's methodology for estimating the crack length of a selfinduced hydraulic fracturing depending on the downhole pressure in the injection well. The results of the work have developed a classification of factors influencing the development of self-induced hydraulic fracturing cracks, a quantitative analysis of the differences in the characteristics of the spread of man-made cracks for two deposits with different geomechanical and hydrodynamic properties. The work makes a significant contribution to the understanding of the laws of the development of man-made cracks and has broad prospects for development, allowing us to significantly improve the current 3D digital models and analytical filtration models, which will improve the production of field reserves and increase the value of the oil recovery factor.
{"title":"Factors of influence on the development of self-induced hydraulic fracturing cracks","authors":"A. V. Syundyukov, D. K. Sagitov","doi":"10.31660/0445-0108-2023-1-73-84","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-73-84","url":null,"abstract":"The article is devoted to the regularities of the propagation of self-induced hydraulic fracturing cracks in the process of injection of the displacement agent into the formation in order to maintain reservoir pressure. Technogenic and petrological factors have a significant impact on the processes of initiation, propagation and degradation of self-induced hydraulic fracturing cracks. In modern oil and gas field practice, we are just beginning to use geomechanical simulators for private calculations and have not yet used them in integrated calculations of field development options, nevertheless, the influence of geomechanical processes of the spread of man-made cracks makes a significant contribution to the field development indicators. The aim of the study is a complex of factors that prevent and contribute to the development of self-induced hydraulic fracturing cracks. The study uses the author's methodology for estimating the crack length of a selfinduced hydraulic fracturing depending on the downhole pressure in the injection well. The results of the work have developed a classification of factors influencing the development of self-induced hydraulic fracturing cracks, a quantitative analysis of the differences in the characteristics of the spread of man-made cracks for two deposits with different geomechanical and hydrodynamic properties. The work makes a significant contribution to the understanding of the laws of the development of man-made cracks and has broad prospects for development, allowing us to significantly improve the current 3D digital models and analytical filtration models, which will improve the production of field reserves and increase the value of the oil recovery factor. ","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127003549","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-45-59
V. G. Mamyashev, A. M. Kuznetsova
The process of compaction of sediments determines the patterns of changes in the properties of rocks of oil and gas bearing sections, primarily their porosity. The porosity of rocks of different lithology varies depending on their depth. The study of the regularities of changes in the porosity of rocks is important for the identification of geological sections, for substantiating the intervals of the existence of reservoirs with intergranular porosity type, for forecasting the properties of support layers by section and for methodological support for the geological interpretation of the materials of geophysical studies of wells. The existing concept of gravitational compaction of sediments doesn't reflect a number of features of this process of rocks in real conditions. The article substantiates the conditions of precipitation formation corresponding to their transition to an initial relatively stable state. The features of precipitation formation in the initial marine and continental conditions, as well as the features of their formation in permafrost strata are substantiated.The general patterns and features of the compaction curves of typical sandstones and clays are considered according to the data of reference wells drilled within the West Siberian oil and gas basin.
{"title":"Features of compaction of sedimentary rocks of oil and gas deposits","authors":"V. G. Mamyashev, A. M. Kuznetsova","doi":"10.31660/0445-0108-2023-1-45-59","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-45-59","url":null,"abstract":"The process of compaction of sediments determines the patterns of changes in the properties of rocks of oil and gas bearing sections, primarily their porosity. The porosity of rocks of different lithology varies depending on their depth. The study of the regularities of changes in the porosity of rocks is important for the identification of geological sections, for substantiating the intervals of the existence of reservoirs with intergranular porosity type, for forecasting the properties of support layers by section and for methodological support for the geological interpretation of the materials of geophysical studies of wells. The existing concept of gravitational compaction of sediments doesn't reflect a number of features of this process of rocks in real conditions. The article substantiates the conditions of precipitation formation corresponding to their transition to an initial relatively stable state. The features of precipitation formation in the initial marine and continental conditions, as well as the features of their formation in permafrost strata are substantiated.The general patterns and features of the compaction curves of typical sandstones and clays are considered according to the data of reference wells drilled within the West Siberian oil and gas basin. ","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131300261","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-85-96
E. R. Shakirov
Field development at a late stage is characterized by high water-cut and considerable volumes of produced water that causes field pipeline congestion. An increase in the volume of produced water entails an increase in hydraulic resistance in pipeline sections, which may limit the effect of ongoing geological and technical actions to intensify oil production. As a result, the production rates decrease at neighboring wells, but at the same time, the hydraulic resistance in the sections of overloaded pipelines increases. In this regard, it makes sense to determine the boundary, which allows you to observe the balance between the increase in amount of geological and technical actions and the current field pipeline congestion.
{"title":"An analysis of the influence of the technological mode of the gathering system of the oil field on the efficiency of geological and technical actions","authors":"E. R. Shakirov","doi":"10.31660/0445-0108-2023-1-85-96","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-85-96","url":null,"abstract":"Field development at a late stage is characterized by high water-cut and considerable volumes of produced water that causes field pipeline congestion. An increase in the volume of produced water entails an increase in hydraulic resistance in pipeline sections, which may limit the effect of ongoing geological and technical actions to intensify oil production. As a result, the production rates decrease at neighboring wells, but at the same time, the hydraulic resistance in the sections of overloaded pipelines increases. In this regard, it makes sense to determine the boundary, which allows you to observe the balance between the increase in amount of geological and technical actions and the current field pipeline congestion. ","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132708908","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 : 2023-03-13DOI: 10.31660/0445-0108-2023-1-13-28
Y. Gladysheva
Western Siberia has oil and gas potential that is very important for the development of the oil and gas industry in Russia. The north of Western Siberia has special significance for the industry, that's where the maximum aggregate deposit of hydrocarbon reserves is located in fields, such as Urengoy, Yamburgskoye and Medvezhye. Over the last decade, a tendency to reduce the efficiency of geological exploration has appeared, therefore, it is necessary to conduct a comprehensive analysis of the actual material and to select priority areas. The Lower Cretaceous complex of the Cretaceous oil and gas megalithic complex located in the north of Western Siberia is the most lucrative. The Neocomian clinoform Achimov deposits of this complex are the main object of study. Achimov deposits are trapped almost throughout the Nadym-Pur interfluve area and are having a complex structure. The formation of Achimov rocks mostly took place in the deep-water part of the paleosea that affected their heterogeneity. An analysis of the geological and field parameters of the Achimov deposits determined the maximum aggregate of hydrocarbon deposits in the eastern and northern parts of the study area, as well as zones of active rifting. Geological exploration should be carried out in such zones initially.
{"title":"Petroleum potential of Achimov deposits in the north of Western Siberia","authors":"Y. Gladysheva","doi":"10.31660/0445-0108-2023-1-13-28","DOIUrl":"https://doi.org/10.31660/0445-0108-2023-1-13-28","url":null,"abstract":"Western Siberia has oil and gas potential that is very important for the development of the oil and gas industry in Russia. The north of Western Siberia has special significance for the industry, that's where the maximum aggregate deposit of hydrocarbon reserves is located in fields, such as Urengoy, Yamburgskoye and Medvezhye. Over the last decade, a tendency to reduce the efficiency of geological exploration has appeared, therefore, it is necessary to conduct a comprehensive analysis of the actual material and to select priority areas. The Lower Cretaceous complex of the Cretaceous oil and gas megalithic complex located in the north of Western Siberia is the most lucrative. The Neocomian clinoform Achimov deposits of this complex are the main object of study. Achimov deposits are trapped almost throughout the Nadym-Pur interfluve area and are having a complex structure. The formation of Achimov rocks mostly took place in the deep-water part of the paleosea that affected their heterogeneity. An analysis of the geological and field parameters of the Achimov deposits determined the maximum aggregate of hydrocarbon deposits in the eastern and northern parts of the study area, as well as zones of active rifting. Geological exploration should be carried out in such zones initially. ","PeriodicalId":240239,"journal":{"name":"Oil and Gas Studies","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132507292","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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