Pub Date : 2023-03-13DOI: 10.32454/0016-7762-2022-64-6-22-28
N. Kasyanova, Shuxin Qiu
Background. The role of dynamocatagenesis in oil and gas formation has been confirmed in a number of publications. However, all of them indicate that dynamocatagenesis manifestations are associated with tectonic disorders selectively. It remains unclear which morphodynamic characteristics of tectonic disorders relate to dynamocatagenesis manifestations, and which values the actual quantitative characteristics of dynamocatagenesis manifestations obtain. Research in this direction is of importance for assessing oil and gas formation in any area, particularly when forecasting unconventional oil and gas resources.Aim. To determine the reasons for the appearance of anomalies recorded in the deep zonality of the catagenetic transformation of organic matter within the Chezhen Sag of the Bohai oil and gas basin in order to understand conditions for the formation of hydrocarbons.Materials and methods. Studies were conducted at the borehole level, based on a comprehensive analysis of the latest geological, geophysical, and geochemical information obtained by the Sinopec Shengli Oilfield Company.Results. At the borehole level, the dynamic type of catagenesis of organic matter was established. A structural-kinematic-age characteristic of faults, to which dynamocatagenesis manifestations are confined, was described. Actual quantitative expressions of thermal impact of faults on the rocks of sedimentary strata were determined.Conclusion. The conducted research confirmed that anomalies in the deep zonality of organic matter catagenesis are related to dynamocatagenesis manifestations, rather than to the regional immersion.
{"title":"Relationship between anomalies in the deep zonality of organic matter catagenesis and dynamocatagenaise manifestations (on example of the Chezhen sag of the Bohai oil and gas basin)","authors":"N. Kasyanova, Shuxin Qiu","doi":"10.32454/0016-7762-2022-64-6-22-28","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-6-22-28","url":null,"abstract":"Background. The role of dynamocatagenesis in oil and gas formation has been confirmed in a number of publications. However, all of them indicate that dynamocatagenesis manifestations are associated with tectonic disorders selectively. It remains unclear which morphodynamic characteristics of tectonic disorders relate to dynamocatagenesis manifestations, and which values the actual quantitative characteristics of dynamocatagenesis manifestations obtain. Research in this direction is of importance for assessing oil and gas formation in any area, particularly when forecasting unconventional oil and gas resources.Aim. To determine the reasons for the appearance of anomalies recorded in the deep zonality of the catagenetic transformation of organic matter within the Chezhen Sag of the Bohai oil and gas basin in order to understand conditions for the formation of hydrocarbons.Materials and methods. Studies were conducted at the borehole level, based on a comprehensive analysis of the latest geological, geophysical, and geochemical information obtained by the Sinopec Shengli Oilfield Company.Results. At the borehole level, the dynamic type of catagenesis of organic matter was established. A structural-kinematic-age characteristic of faults, to which dynamocatagenesis manifestations are confined, was described. Actual quantitative expressions of thermal impact of faults on the rocks of sedimentary strata were determined.Conclusion. The conducted research confirmed that anomalies in the deep zonality of organic matter catagenesis are related to dynamocatagenesis manifestations, rather than to the regional immersion. ","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82129333","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: 10.32454/0016-7762-2022-64-6-29-38
K. O. Shcherbakova
Background. The production of oil and gas by horizontal wells, despite all its advantages, is subject to exploratory and operational complications. At the final stage of their development, such fields become hard-to-recover reserves. Production of oil and gas is often associated with a high water cut, a significant drop in reservoir pressure, and precipitation of asphaltene deposits.Aim. To analyze the problem of early indication of flooding of horizontal wells and do research on existing solutions nowadays.Materials and methods. The dependence of the logarithm of the water-oil ratio on the cumulative oil production was investigated. An analysis of production decline curves was carried out, along with a graphical diagnostics of flooding evolution.Results. The anticipated cumulative production of a well was determined by continuing the linear dependence to its economic limit. A graph was plotted in semi-logarithmic coordinates for the analysis of production decline curves. According to the dependence of the water-oil ratio versus time, the type of early well flooding was determined in logarithmic coordinates.Conclusion. One of the most significant problems in the development of horizontal wells consists in the high water cut of the obtained products. According to the data for 2020, the average water cut in the main fields of Russia comprises at least 85%, with the mass ratio of produced oil and associated water approaching 1:7. The use of water-soluble polymers for waterproofing of horizontal wells can be considered a promising direction due to their efficiency in limiting water inflow in vertical and directional wells.
{"title":"The problem of high water cut in the products of horizontal wells","authors":"K. O. Shcherbakova","doi":"10.32454/0016-7762-2022-64-6-29-38","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-6-29-38","url":null,"abstract":"Background. The production of oil and gas by horizontal wells, despite all its advantages, is subject to exploratory and operational complications. At the final stage of their development, such fields become hard-to-recover reserves. Production of oil and gas is often associated with a high water cut, a significant drop in reservoir pressure, and precipitation of asphaltene deposits.Aim. To analyze the problem of early indication of flooding of horizontal wells and do research on existing solutions nowadays.Materials and methods. The dependence of the logarithm of the water-oil ratio on the cumulative oil production was investigated. An analysis of production decline curves was carried out, along with a graphical diagnostics of flooding evolution.Results. The anticipated cumulative production of a well was determined by continuing the linear dependence to its economic limit. A graph was plotted in semi-logarithmic coordinates for the analysis of production decline curves. According to the dependence of the water-oil ratio versus time, the type of early well flooding was determined in logarithmic coordinates.Conclusion. One of the most significant problems in the development of horizontal wells consists in the high water cut of the obtained products. According to the data for 2020, the average water cut in the main fields of Russia comprises at least 85%, with the mass ratio of produced oil and associated water approaching 1:7. The use of water-soluble polymers for waterproofing of horizontal wells can be considered a promising direction due to their efficiency in limiting water inflow in vertical and directional wells. ","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87150675","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: 10.32454/0016-7762-2022-64-6-8-21
V. Kerimov, D. Kisler, A. K. Shatyrov, E. Z. Idiyatullina
Background. The article considers paleotectonic and paleogeographic criteria for forecasting hydrocarbon accumulations and determining the sites of priority exploration on the Sakhalin shelf.Aim. To determine the priority objects of geological exploration on the Sakhalin shelf based on paleotectonic and paleogeographic criteria.Materials and methods. Generalization and statistical processing of available data, fieldwork materials, reference literature, and scientific publications. Modeling of the tectonic evolution of the Cenozoic sedimentary basin in the studied section of the Sakhalin shelf and its individual sections. The formation and evolution of hydrocarbon systems in the waters of the Sakhalin shelf occurred in the process of geodynamic evolution of the West Okhotsk megabasin covering modern Sakhalin and the adjacent water area. The PetroMod (Schlumberger) and Qgis software packages were used.Results. The developed paleotectonic and paleogeographic criteria are suitable for both determining the sites of priority exploration and developing appropriate recommendations. Schemes with the allocation of areas that meet the developed criteria were constructed. For all three license areas, the stage of prospecting and evaluation of the oil and gas deposits is required, along with the completion of the exploration and production stage at already discovered fields. Within the license areas, the most promising structures were identified and boreholes were outlined.
{"title":"Paleotectonic and paleogeographic criteria for forecasting hydrocarbon accumulations in the water area of the Sakhalin shelf","authors":"V. Kerimov, D. Kisler, A. K. Shatyrov, E. Z. Idiyatullina","doi":"10.32454/0016-7762-2022-64-6-8-21","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-6-8-21","url":null,"abstract":"Background. The article considers paleotectonic and paleogeographic criteria for forecasting hydrocarbon accumulations and determining the sites of priority exploration on the Sakhalin shelf.Aim. To determine the priority objects of geological exploration on the Sakhalin shelf based on paleotectonic and paleogeographic criteria.Materials and methods. Generalization and statistical processing of available data, fieldwork materials, reference literature, and scientific publications. Modeling of the tectonic evolution of the Cenozoic sedimentary basin in the studied section of the Sakhalin shelf and its individual sections. The formation and evolution of hydrocarbon systems in the waters of the Sakhalin shelf occurred in the process of geodynamic evolution of the West Okhotsk megabasin covering modern Sakhalin and the adjacent water area. The PetroMod (Schlumberger) and Qgis software packages were used.Results. The developed paleotectonic and paleogeographic criteria are suitable for both determining the sites of priority exploration and developing appropriate recommendations. Schemes with the allocation of areas that meet the developed criteria were constructed. For all three license areas, the stage of prospecting and evaluation of the oil and gas deposits is required, along with the completion of the exploration and production stage at already discovered fields. Within the license areas, the most promising structures were identified and boreholes were outlined. ","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80587464","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-54-63
E. V. Skorobogatova
Introduction. An analysis of the geological structure and gas and oil presence of the Arctic region in Western Siberia is carried out.Aim. To assess the potential and undiscovered gas resources, as well as to forecast prospects and potential of explored reserves for 2023–2040.Materials and methods. The geological structure and gas and oil presence specific to Arctic regions and regions of Western Siberian megabasin and megaprovince, including Yamal, Gydan, Southern-Kara with bays (shelf) and western part of the Yenisei-Khatanga, were analysed. In these locations, hydrocarbon reserves (HC) of non-associated gas, crude and condensate, HC accumulations in the volume of a sedimentary Jurassic-Cretaceous cover (Cenozoic upper regional seal), oil-and-gas and geostatistics, as well as the scale of layers and deposits, were assessed.Results. The resources of Yamal-Kara and Gydan-Yenisei land and shelf regions were assessed. A forecast was made concerning the potential and undiscovered gas resources, as well as possible increments of explored reserves for 2023–2040. The comparative resource geostatistics of the land and shelf appears to be somewhat premature. However, according to most researchers, land undiscovered giants (>0.3 trillion m3) can be already excluded, while shelf supergiant gas fields are possible (unique ones are excluded). Nevertheless, their number can only be evaluated by prospecting and exploration in the most favourable structural and tectonic conditions.Conclusion. The Yamal-Kara region can become the largest strategic gas production centre of both Western Siberia and Russia as a whole, while Gydan-Yenisei region can be a tactical centre.
{"title":"Arctic regions of Western Siberia. A comparative analysis of the geological structure and gas and oil presence. Prospects for new discoveries","authors":"E. V. Skorobogatova","doi":"10.32454/0016-7762-2022-64-5-54-63","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-54-63","url":null,"abstract":"Introduction. An analysis of the geological structure and gas and oil presence of the Arctic region in Western Siberia is carried out.Aim. To assess the potential and undiscovered gas resources, as well as to forecast prospects and potential of explored reserves for 2023–2040.Materials and methods. The geological structure and gas and oil presence specific to Arctic regions and regions of Western Siberian megabasin and megaprovince, including Yamal, Gydan, Southern-Kara with bays (shelf) and western part of the Yenisei-Khatanga, were analysed. In these locations, hydrocarbon reserves (HC) of non-associated gas, crude and condensate, HC accumulations in the volume of a sedimentary Jurassic-Cretaceous cover (Cenozoic upper regional seal), oil-and-gas and geostatistics, as well as the scale of layers and deposits, were assessed.Results. The resources of Yamal-Kara and Gydan-Yenisei land and shelf regions were assessed. A forecast was made concerning the potential and undiscovered gas resources, as well as possible increments of explored reserves for 2023–2040. The comparative resource geostatistics of the land and shelf appears to be somewhat premature. However, according to most researchers, land undiscovered giants (>0.3 trillion m3) can be already excluded, while shelf supergiant gas fields are possible (unique ones are excluded). Nevertheless, their number can only be evaluated by prospecting and exploration in the most favourable structural and tectonic conditions.Conclusion. The Yamal-Kara region can become the largest strategic gas production centre of both Western Siberia and Russia as a whole, while Gydan-Yenisei region can be a tactical centre.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88174905","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-73-85
R. A. Skruybite, Sh. I. Fakhrutdinov
Background. When calculating reserves using geostatistical methods, variographic analysis can occasionally encounter difficulties in determining the direction of the search ellipsoid, particularly in deposits with a lognormal distribution of the useful component. The search ellipsoid defines the main directions of mineralization anisotropy, thus comprising a key element in the process of interpolating grades into a block model. The correct interpolation of grades provides a reliable estimate of reserves.Aim. To determine the influence of the orebody morphology on anisotropic directions.Materials and methods. Data from a report on the technical and economic substantiation of the resource and estimation parameters of the Mnogovershinnoe gold deposit for 1975 were used, along with a database comprising catalogues of borehole coordinates, mining outputs, inclinometry and exploratory test data. Three-dimensional computer modeling was performed in the Micromine mining and geological information system. Using the example of the Verkhnee orebody of the Mnogovershinnoe gold deposit, statistical and geostatistical studies were carried out to calculate the reserves. The as-calculated reserves were compared with those estimated by a polygonal method and approved by the State Commission for Mineral Reserves (GKZ) USSR in 1975.Results. The conducted comparison of the geological interpretation of the orebody under study, obtained by both wireframe modeling based on exploratory test data and the search ellipsoid constructed by variographic analysis, сonfirmed the influence of the orebody morphology on the axis directions of the minimal variability of mineralization. The orientation of the search ellipsoid was determined to be consistent with the geological interpretation of the orebody. Verification of the interpolated block model showed the estimate to be close to a reliable value. The comparison of the calculated reserves with those of 1975 showed their good convergence.
{"title":"Geological foundations for determination of anisotropic directions in geostatistical modeling on the example of Verkhnee orebody of the Mnogovershinnoe gold deposit","authors":"R. A. Skruybite, Sh. I. Fakhrutdinov","doi":"10.32454/0016-7762-2022-64-5-73-85","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-73-85","url":null,"abstract":"Background. When calculating reserves using geostatistical methods, variographic analysis can occasionally encounter difficulties in determining the direction of the search ellipsoid, particularly in deposits with a lognormal distribution of the useful component. The search ellipsoid defines the main directions of mineralization anisotropy, thus comprising a key element in the process of interpolating grades into a block model. The correct interpolation of grades provides a reliable estimate of reserves.Aim. To determine the influence of the orebody morphology on anisotropic directions.Materials and methods. Data from a report on the technical and economic substantiation of the resource and estimation parameters of the Mnogovershinnoe gold deposit for 1975 were used, along with a database comprising catalogues of borehole coordinates, mining outputs, inclinometry and exploratory test data. Three-dimensional computer modeling was performed in the Micromine mining and geological information system. Using the example of the Verkhnee orebody of the Mnogovershinnoe gold deposit, statistical and geostatistical studies were carried out to calculate the reserves. The as-calculated reserves were compared with those estimated by a polygonal method and approved by the State Commission for Mineral Reserves (GKZ) USSR in 1975.Results. The conducted comparison of the geological interpretation of the orebody under study, obtained by both wireframe modeling based on exploratory test data and the search ellipsoid constructed by variographic analysis, сonfirmed the influence of the orebody morphology on the axis directions of the minimal variability of mineralization. The orientation of the search ellipsoid was determined to be consistent with the geological interpretation of the orebody. Verification of the interpolated block model showed the estimate to be close to a reliable value. The comparison of the calculated reserves with those of 1975 showed their good convergence.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85314757","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-94-100
S. M. Popov, E. A. Popova, I. G. Tumoian
Background. The main deposits of Donbass and their mineral resource potential are considered.Aim. To develop a strategy for the socio-economic development of Donbass under contemporary political and economic conditions, with a focus on the development of human capital and further integration with the Russian Federation, CIS, and friendly countries.Materials and methods. A multipronged approach was used to define the contours, directions, and stages of the socio-economic development of Donbass.Results. The conducted analysis of the current state of the mineral resource base of Donbass revealed the most significant types of mineral resources for Donbass economy. An economic estimate of the cost of mineral resources extracted in Donbass and their market demand was obtained. Various types of resources were ranked in terms of their significance for Donbass economy.Conclusion. An approach to an integrated assessment of the expenses associated with the restoration of the mineral resource base of Donbass is proposed. In this respect, priority directions of economic activities are established.
{"title":"Economic estimation of the mineral resource base of Donbass: status and prospects","authors":"S. M. Popov, E. A. Popova, I. G. Tumoian","doi":"10.32454/0016-7762-2022-64-5-94-100","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-94-100","url":null,"abstract":"Background. The main deposits of Donbass and their mineral resource potential are considered.Aim. To develop a strategy for the socio-economic development of Donbass under contemporary political and economic conditions, with a focus on the development of human capital and further integration with the Russian Federation, CIS, and friendly countries.Materials and methods. A multipronged approach was used to define the contours, directions, and stages of the socio-economic development of Donbass.Results. The conducted analysis of the current state of the mineral resource base of Donbass revealed the most significant types of mineral resources for Donbass economy. An economic estimate of the cost of mineral resources extracted in Donbass and their market demand was obtained. Various types of resources were ranked in terms of their significance for Donbass economy.Conclusion. An approach to an integrated assessment of the expenses associated with the restoration of the mineral resource base of Donbass is proposed. In this respect, priority directions of economic activities are established.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81398585","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-64-72
E. B. Yanitskiy
Background. In this paper, available methods for determining the geometry and density of exploration networks used in operational planning are discussed, along with approaches to determining the permissible error limits in the assessment of geological indicators. The Kovdorskoye apatite and staffelite ore field was selected as a research object.Aim. To determine the rational parameters of an in-mine sampling network for use in operational planning of phosphate ore mining.Materials and methods. The research was carried out as part of a project on the development of a methodology for operational in-mine sampling of apatite and staffelite ores. Quantitative data were processed and analyzed using the methods of mathematical statistics and cartography.Results. The conducted geometric autocorrelation and assessment of the anisotropy of variability in the content of components, which determine the quality of mineral raw materials, allowed the author to establish the rational parameters of an operational in-mine sampling network during the extraction of phosphate raw materials from the Kovdorskoye apatite and staffelite ore field.Conclusion. The absence of a pronounced anisotropy in the content of P2O5 and CO2 in apatite and staffelite ores was established, which implies the feasibility of using a uniform in-mine sampling network. The parameters of such a network were determined, which confirm the need to sample the rock cuttings in each borehole.
{"title":"Improving the geometrization reliability of qualitative indicators of phosphate ores during their open mining on the example of the Kovdorskoye apatite and staffelite ore field","authors":"E. B. Yanitskiy","doi":"10.32454/0016-7762-2022-64-5-64-72","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-64-72","url":null,"abstract":"Background. In this paper, available methods for determining the geometry and density of exploration networks used in operational planning are discussed, along with approaches to determining the permissible error limits in the assessment of geological indicators. The Kovdorskoye apatite and staffelite ore field was selected as a research object.Aim. To determine the rational parameters of an in-mine sampling network for use in operational planning of phosphate ore mining.Materials and methods. The research was carried out as part of a project on the development of a methodology for operational in-mine sampling of apatite and staffelite ores. Quantitative data were processed and analyzed using the methods of mathematical statistics and cartography.Results. The conducted geometric autocorrelation and assessment of the anisotropy of variability in the content of components, which determine the quality of mineral raw materials, allowed the author to establish the rational parameters of an operational in-mine sampling network during the extraction of phosphate raw materials from the Kovdorskoye apatite and staffelite ore field.Conclusion. The absence of a pronounced anisotropy in the content of P2O5 and CO2 in apatite and staffelite ores was established, which implies the feasibility of using a uniform in-mine sampling network. The parameters of such a network were determined, which confirm the need to sample the rock cuttings in each borehole.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73707219","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-41-53
A. K. Shatyrov
Introduction. The conditions determining the distribution of abnormal formation pressures in the aquatic area of the Sakhalin shelf are analysed using boring data.Aim. To analyse the genesis of abnormally high pore pressure (AHPP) or abnormally high formation pressure (AHFP) zones and identify the pore pressure heterogeneities of the Sakhalin shelf.Materials and methods. Data systematization and statistical generalization, partial borrowing of materials from field data, reference literature and published materials. Modelling of the AHPP (AHFP) formation process was performed using the PetroMod software (Schlumberger).Results. The study revealed the isolated AHPP zones of the Sakhalin shelf, related to the syngenetic AHPPs and typically encountered in facies that develop downward the regional dip and consist of deltaic sediments, formed subsequently in the environments of internal neritic (subsaline-aqueous and offshore-marine sediments) and middle neritic (shallow marine sediments) zones, i.e., in places with the large mass accumulation rate. From this position, the AHPPs (AHFPs) in the Paleo-Amur deltaic sediments of the Sakhalin shelf were studied. Various procedures and direct borehole measurements proved the sectional presence of AHPP (AHFP) zones. Within the limits of the Sakhalin shelf, an increase in the formation pressure is recorded in several boreholes, i.e., zones of abnormally high formation pressure (AHFP) are revealed. The process of forming AHPP (AHFP) should be modelled based on the knowledge about the compaction processes of rocks, as well as their initial, final and normal porosity, density and pressure.
{"title":"Distribution characteristics of abnormal formation pressures in the aquatic area of the Sakhalin shelf","authors":"A. K. Shatyrov","doi":"10.32454/0016-7762-2022-64-5-41-53","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-41-53","url":null,"abstract":"Introduction. The conditions determining the distribution of abnormal formation pressures in the aquatic area of the Sakhalin shelf are analysed using boring data.Aim. To analyse the genesis of abnormally high pore pressure (AHPP) or abnormally high formation pressure (AHFP) zones and identify the pore pressure heterogeneities of the Sakhalin shelf.Materials and methods. Data systematization and statistical generalization, partial borrowing of materials from field data, reference literature and published materials. Modelling of the AHPP (AHFP) formation process was performed using the PetroMod software (Schlumberger).Results. The study revealed the isolated AHPP zones of the Sakhalin shelf, related to the syngenetic AHPPs and typically encountered in facies that develop downward the regional dip and consist of deltaic sediments, formed subsequently in the environments of internal neritic (subsaline-aqueous and offshore-marine sediments) and middle neritic (shallow marine sediments) zones, i.e., in places with the large mass accumulation rate. From this position, the AHPPs (AHFPs) in the Paleo-Amur deltaic sediments of the Sakhalin shelf were studied. Various procedures and direct borehole measurements proved the sectional presence of AHPP (AHFP) zones. Within the limits of the Sakhalin shelf, an increase in the formation pressure is recorded in several boreholes, i.e., zones of abnormally high formation pressure (AHFP) are revealed. The process of forming AHPP (AHFP) should be modelled based on the knowledge about the compaction processes of rocks, as well as their initial, final and normal porosity, density and pressure.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"225 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80116959","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-24-40
U. S. Serikova, M. Allanazarova, E. Z. Idiyatullina
Introduction. The paper considers conditions conductive to the formation and location of oil and gas accumulations in the Turkmen sector of the South Caspian Basin.Aim. Modeling of hydrocarbon systems of the Turkmen sector of the South Caspian Basin.Materials and methods. Statistical generalization and systematization of the data and materials presented in reference literature, field sources, and archive data, as well as published works of Sh.F. Mekhtiev, I.S. Guliev, M.Z. Rachinskii, S.S. Dzhibuti, S.A. Aliev, V.Yu. Kerimov, V.V. Kolodiya, etc. Data modeling was performed using the PetroMod software.Results. As a result of numerical modeling, the formation conditions of hydrocarbon systems and their main elements, i.e., oil and gas source strata (OGSS), reservoirs and seals, were determined. Oil and gas prospects were identified, and the main spatial and temporal patterns in the development of generation, migration, and accumulation processes of hydrocarbon fluids, as well as the formation conditions of traps were established. In addition, a map was created to illustrate potential prospective zones, objects, and “plays.” Oil-and-gas prospects were determined, and the main areas of oil-and-gas exploration in the Turkmen sector of the Caspian Sea were substantiated.
{"title":"Hydrocarbon systems in the Turkmen sector of the South Caspian basin","authors":"U. S. Serikova, M. Allanazarova, E. Z. Idiyatullina","doi":"10.32454/0016-7762-2022-64-5-24-40","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-24-40","url":null,"abstract":"Introduction. The paper considers conditions conductive to the formation and location of oil and gas accumulations in the Turkmen sector of the South Caspian Basin.Aim. Modeling of hydrocarbon systems of the Turkmen sector of the South Caspian Basin.Materials and methods. Statistical generalization and systematization of the data and materials presented in reference literature, field sources, and archive data, as well as published works of Sh.F. Mekhtiev, I.S. Guliev, M.Z. Rachinskii, S.S. Dzhibuti, S.A. Aliev, V.Yu. Kerimov, V.V. Kolodiya, etc. Data modeling was performed using the PetroMod software.Results. As a result of numerical modeling, the formation conditions of hydrocarbon systems and their main elements, i.e., oil and gas source strata (OGSS), reservoirs and seals, were determined. Oil and gas prospects were identified, and the main spatial and temporal patterns in the development of generation, migration, and accumulation processes of hydrocarbon fluids, as well as the formation conditions of traps were established. In addition, a map was created to illustrate potential prospective zones, objects, and “plays.” Oil-and-gas prospects were determined, and the main areas of oil-and-gas exploration in the Turkmen sector of the Caspian Sea were substantiated.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77579522","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 : 2023-02-05DOI: 10.32454/0016-7762-2022-64-5-86-93
V. Skripka, L. H. Minyazeva
Background. The article considers one of the variants of the original planetary drilling organ, in which used multiple impacts on the mass to be destroyed. This makes it possible to improve the methods of sinking inclined and horizontal wells by significantly reducing the required feed force and reducing the energy intensity of bottom hole destructionAim. To investigate drilling methods and tools, which can be used to significantly reduce the radius of changes in drilling direction when creating inclined and horizontal wellbores.Materials and methods. An analysis of patent information and its experimental verification under laboratory conditions.Results. The main advantage of the analyzed drilling bodies is associated with their rock-breaking ability due to multiple shock pulses directed at an angle to the face surface. This allows the energy intensity of fracture and the required feed force in the axial direction to be significantly reduced, thus providing for larger wellbore diameters. A reduction in the axial length of the drilling body leads to a decrease in the radius of changes in drilling direction, thereby contributing to improved technologies of wellbore drilling, in particular, when creating horizontal wellbores.Conclusion. Planetary rock-breaking bodies implement quasi-dynamic rock destruction by multiple shock pulses and spalling off rock pieces from an automatically formed wavy face surface. On this basis, modern technologies of drilling inclined and horizontal wellbores can be improved.
{"title":"Planetary rock-breaking bodies and horizontal drilling","authors":"V. Skripka, L. H. Minyazeva","doi":"10.32454/0016-7762-2022-64-5-86-93","DOIUrl":"https://doi.org/10.32454/0016-7762-2022-64-5-86-93","url":null,"abstract":"Background. The article considers one of the variants of the original planetary drilling organ, in which used multiple impacts on the mass to be destroyed. This makes it possible to improve the methods of sinking inclined and horizontal wells by significantly reducing the required feed force and reducing the energy intensity of bottom hole destructionAim. To investigate drilling methods and tools, which can be used to significantly reduce the radius of changes in drilling direction when creating inclined and horizontal wellbores.Materials and methods. An analysis of patent information and its experimental verification under laboratory conditions.Results. The main advantage of the analyzed drilling bodies is associated with their rock-breaking ability due to multiple shock pulses directed at an angle to the face surface. This allows the energy intensity of fracture and the required feed force in the axial direction to be significantly reduced, thus providing for larger wellbore diameters. A reduction in the axial length of the drilling body leads to a decrease in the radius of changes in drilling direction, thereby contributing to improved technologies of wellbore drilling, in particular, when creating horizontal wellbores.Conclusion. Planetary rock-breaking bodies implement quasi-dynamic rock destruction by multiple shock pulses and spalling off rock pieces from an automatically formed wavy face surface. On this basis, modern technologies of drilling inclined and horizontal wellbores can be improved.","PeriodicalId":33343,"journal":{"name":"Izvestiia vysshikh uchebnykh zavedenii Geologiia i razvedka","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85860887","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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