Stanislav G. Kuzmenkov, Maksim I. Korolev, Maksim V. Novikov, Alexandra N. Palyanitsina, Olga A. Nanishvili, Valery I. Isaev
Stabilization of oil production at the level of 215–220 million tons/year, as well as its subsequent growth, is a priority task for the enterprises of the fuel and energy complex of Khanty-Mansi Autonomous Okrug – Yugra (KhMAO – Yugra). It is impossible to achieve this without the active implementation of the most effective modern technologies for enhanced oil recovery. This article aims to analyze the methods of enhanced oil recovery and oil production stimulation methods (EOR and PS) used at the KhMAO – Yugra fields on an industrial scale, their features and their contribution to additional oil production from 2001 to 2021. The article describes such technologies as sidetracking (STB), physical and chemical methods (FCM), hydraulic fracturing (HF), bottom-hole treatment (BHT), hydrodynamic methods (HDM), horizontal well drilling (SHD), as well as other geological and technical measures (GTM) aimed at optimizing well operation (other methods (OM)). The study showed that FCM, BHT and other well interventions became the most used. The share of additional oil produced through the use of EOR and PS has doubled since 2013: 8% in 2013, 16.2% in 2021. Hydraulic fracturing, deep drilling and sidetracking showed the highest efficiency. All this led to the stabilization of the annual oil production in KhMAO – Yugra and even to its growth in 2021. The use of enhanced oil recovery methods on a non-alternative basis in developed fields is especially important, because the share of hard-to-recover reserves is high and reaches 80% for some companies in the Khanty-Mansi Autonomous Okrug – Yugra. For such fields, it is necessary to strengthen scientific research in the field of substantiation of optimal conditions for well construction, as well as the operation of development systems.
{"title":"Efficiency of enhanced oil recovery’s and oil production stimulation’s methods at the oil fields of Khanty-Mansi Autonomous Okrug – Yugra","authors":"Stanislav G. Kuzmenkov, Maksim I. Korolev, Maksim V. Novikov, Alexandra N. Palyanitsina, Olga A. Nanishvili, Valery I. Isaev","doi":"10.18599/grs.2023.3.16","DOIUrl":"https://doi.org/10.18599/grs.2023.3.16","url":null,"abstract":"Stabilization of oil production at the level of 215–220 million tons/year, as well as its subsequent growth, is a priority task for the enterprises of the fuel and energy complex of Khanty-Mansi Autonomous Okrug – Yugra (KhMAO – Yugra). It is impossible to achieve this without the active implementation of the most effective modern technologies for enhanced oil recovery. This article aims to analyze the methods of enhanced oil recovery and oil production stimulation methods (EOR and PS) used at the KhMAO – Yugra fields on an industrial scale, their features and their contribution to additional oil production from 2001 to 2021. The article describes such technologies as sidetracking (STB), physical and chemical methods (FCM), hydraulic fracturing (HF), bottom-hole treatment (BHT), hydrodynamic methods (HDM), horizontal well drilling (SHD), as well as other geological and technical measures (GTM) aimed at optimizing well operation (other methods (OM)). The study showed that FCM, BHT and other well interventions became the most used. The share of additional oil produced through the use of EOR and PS has doubled since 2013: 8% in 2013, 16.2% in 2021. Hydraulic fracturing, deep drilling and sidetracking showed the highest efficiency. All this led to the stabilization of the annual oil production in KhMAO – Yugra and even to its growth in 2021. The use of enhanced oil recovery methods on a non-alternative basis in developed fields is especially important, because the share of hard-to-recover reserves is high and reaches 80% for some companies in the Khanty-Mansi Autonomous Okrug – Yugra. For such fields, it is necessary to strengthen scientific research in the field of substantiation of optimal conditions for well construction, as well as the operation of development systems.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039291","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}
Marina V. Osipova, Ravil R. Shakirov, Andrey G. Koshcheev, Sergey V. Pisarchuk, Anton G. Naymushin, Oleg P. Nesterov
This work is devoted to the peculiarities of sedimentation and geological structure of clinoform deposits of the Yarudeisky megaswell (Western Siberia). The main feature of the clinoforms under consideration is that the sediments are confined to the marginal regional clinocyclite of the western dip of the area of oncoming clinoforms, formed in relatively shallow sea conditions and differing from deep-sea clinoforms by pinching out not onto the Bazhenov formation or the early underlying clinoforms of the western dip, but by stopping their spread along the path of movement of the oncoming clinoforms eastern dip. The study of the counter clinoforms of the Yarudeisky megaswell is based on a regional analysis of the structure of cross-layered deposits in conditions of extremely poor knowledge of the study area. Within the framework of western dipping clinoforms, possible oil and gas potential prospects for the Achimov complex within the boundaries of the Yarudeisky megaswell are identified. As a result of the analysis of geological and geophysical data, the boundaries of the distribution of opposing clinoform complexes in the study area were determined. The existing paleo-geomorphological conditions that contribute to the accumulation of sandstone with improved properties in the designated seismic complexes are presented. The fields of the Nadym oil and gas bearing region with the proven productivity of the Neocomian clinoform complex are indicated, which confirms the oil and gas potential of the region and suggests favorable conditions for the accumulation of hydrocarbons in the study area.
{"title":"Features of the geological structure of the Achimov complex of the Yarudeisky megaswell (Western Siberia)","authors":"Marina V. Osipova, Ravil R. Shakirov, Andrey G. Koshcheev, Sergey V. Pisarchuk, Anton G. Naymushin, Oleg P. Nesterov","doi":"10.18599/grs.2023.3.5","DOIUrl":"https://doi.org/10.18599/grs.2023.3.5","url":null,"abstract":"This work is devoted to the peculiarities of sedimentation and geological structure of clinoform deposits of the Yarudeisky megaswell (Western Siberia). The main feature of the clinoforms under consideration is that the sediments are confined to the marginal regional clinocyclite of the western dip of the area of oncoming clinoforms, formed in relatively shallow sea conditions and differing from deep-sea clinoforms by pinching out not onto the Bazhenov formation or the early underlying clinoforms of the western dip, but by stopping their spread along the path of movement of the oncoming clinoforms eastern dip. The study of the counter clinoforms of the Yarudeisky megaswell is based on a regional analysis of the structure of cross-layered deposits in conditions of extremely poor knowledge of the study area. Within the framework of western dipping clinoforms, possible oil and gas potential prospects for the Achimov complex within the boundaries of the Yarudeisky megaswell are identified. As a result of the analysis of geological and geophysical data, the boundaries of the distribution of opposing clinoform complexes in the study area were determined. The existing paleo-geomorphological conditions that contribute to the accumulation of sandstone with improved properties in the designated seismic complexes are presented. The fields of the Nadym oil and gas bearing region with the proven productivity of the Neocomian clinoform complex are indicated, which confirms the oil and gas potential of the region and suggests favorable conditions for the accumulation of hydrocarbons in the study area.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040048","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}
Currently, in the energy strategies presented by Japan, the Republic of South Korea, the Russian Federation and the countries of the European Union, hydrogen is considered as a promising energy carrier that should replace fossil fuels (oil, gas, coal) and be used for accumulation, storage and delivery of energy to different regions of the world. The improvement of hydrogen energy technologies plays a special role in the low-carbon development of the world economy. The main advantages of hydrogen are the possibility of obtaining it from various sources and the absence of carbon dioxide emissions when it is used as an energy carrier, which is especially important against the backdrop of the current climate agenda. In the meantime, this energy carrier is artificially created, since there are no deposits of free hydrogen in nature. Therefore, hydrogen should be perceived precisely as a “carrier” of energy, and not as a fuel. The purpose of this study is to substantiate the feasibility of building tidal power plants, the development of hydrogen technologies and industrial complexes in the Russian Federation.
{"title":"Prospects for the development of hydrogen energy in the Russian Federation","authors":"Svetlana V. Razmanova","doi":"10.18599/grs.2023.3.25","DOIUrl":"https://doi.org/10.18599/grs.2023.3.25","url":null,"abstract":"Currently, in the energy strategies presented by Japan, the Republic of South Korea, the Russian Federation and the countries of the European Union, hydrogen is considered as a promising energy carrier that should replace fossil fuels (oil, gas, coal) and be used for accumulation, storage and delivery of energy to different regions of the world. The improvement of hydrogen energy technologies plays a special role in the low-carbon development of the world economy. The main advantages of hydrogen are the possibility of obtaining it from various sources and the absence of carbon dioxide emissions when it is used as an energy carrier, which is especially important against the backdrop of the current climate agenda. In the meantime, this energy carrier is artificially created, since there are no deposits of free hydrogen in nature. Therefore, hydrogen should be perceived precisely as a “carrier” of energy, and not as a fuel. The purpose of this study is to substantiate the feasibility of building tidal power plants, the development of hydrogen technologies and industrial complexes in the Russian Federation.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040050","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}
Detailed mineralogical and geochemical studies of Ti-Fe oxides from gabbroids of the Nauruz and Utlyktash post-subductional complexes, West Magnitogorsk Zone, South Urals, have been carried out. The polygenic nature of Ti-Fe mineralization in Nauruz sill, Utlyktash layered lopolith and Uraz intrusion rocks has been established. The Nauruz massif is dominated by titanomagnetite, which crystallized both from the Ti-Fe-oxide liquid at the early magmatic stage and from the residual Ti-Fe-enriched silicate melt at the intermediate and late magmatic stages (~970–800°C). The most rich in Ti-Fe oxides (Fe2O3* up to 20.1 wt %, TiO2 up to 1.6 wt %, and V up to 430 ppm) is the middle zone of the sill associated with intrusion of magma enriched in orthopyroxene phenocrysts. Both titanomagnetite and ilmenite are widespread in the Utlyktash lopolith, forming the richest accumulations in the lower part of the massif (Fe2O3* up to 18.1 wt %, TiO2 up to 2.9 wt %, and V up to 545 g/t) due to gravitational settling of crystallizing phases. The gabbroids of the Uraz intrusion are similar in mineral and chemical composition, but differ from the Utlyktash lopolith in the patterns of formation of Ti-Fe mineralization, which requires a special study. In general, the geological settings for the formation of the Nauruz sill and Utlyktash lopolith are quite favorable for the formation of economic Fe-Ti ores.
{"title":"Origin of Ti-Fe-oxide mineralization of post-island-arc gabbroid complexes in the northern part of the West Magnitogorsk zone (Southern Urals)","authors":"Ildar R. Rakhimov, Andrey V. Vishnevskiy","doi":"10.18599/grs.2023.3.21","DOIUrl":"https://doi.org/10.18599/grs.2023.3.21","url":null,"abstract":"Detailed mineralogical and geochemical studies of Ti-Fe oxides from gabbroids of the Nauruz and Utlyktash post-subductional complexes, West Magnitogorsk Zone, South Urals, have been carried out. The polygenic nature of Ti-Fe mineralization in Nauruz sill, Utlyktash layered lopolith and Uraz intrusion rocks has been established. The Nauruz massif is dominated by titanomagnetite, which crystallized both from the Ti-Fe-oxide liquid at the early magmatic stage and from the residual Ti-Fe-enriched silicate melt at the intermediate and late magmatic stages (~970–800°C). The most rich in Ti-Fe oxides (Fe2O3* up to 20.1 wt %, TiO2 up to 1.6 wt %, and V up to 430 ppm) is the middle zone of the sill associated with intrusion of magma enriched in orthopyroxene phenocrysts. Both titanomagnetite and ilmenite are widespread in the Utlyktash lopolith, forming the richest accumulations in the lower part of the massif (Fe2O3* up to 18.1 wt %, TiO2 up to 2.9 wt %, and V up to 545 g/t) due to gravitational settling of crystallizing phases. The gabbroids of the Uraz intrusion are similar in mineral and chemical composition, but differ from the Utlyktash lopolith in the patterns of formation of Ti-Fe mineralization, which requires a special study. In general, the geological settings for the formation of the Nauruz sill and Utlyktash lopolith are quite favorable for the formation of economic Fe-Ti ores.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135040051","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}
Ilyas A. Nuriev, Ruslan К. Khairtdinov, Aidar I. Sattarov, Ilnur M. Farrakhov
The majority of reserves of small oil companies of the Republic of Tatarstan are represented by carbonate reservoirs with low filtration and capacitance properties, low reservoir pressures and high oil viscosity. All this leads to a rapid decrease and a low level of current oil flows. The Akan oil field of Predpriyatie Kara Altyn CJSC is one of the examples. Thermal methods are considered as the most effective technologies for deposits with high-viscosity oil. According to the results of laboratory study of various variants of thermal methods and geological and hydrodynamic modeling, the steam-cyclic method of development was determined as the most effective at the Akan field. Two producing directional wells and two horizontal wells have been selected for experimental work on steam injection. The article considers the downhole equipment used for injection heat carrier, describes the process of steam injection with the dynamics of controlled parameters, production indicators and efficiency after heat treatment of wells. Conclusions are presented for the completed works on wells.
{"title":"Practical experience of heat treatment of an oil carbonate reservoir","authors":"Ilyas A. Nuriev, Ruslan К. Khairtdinov, Aidar I. Sattarov, Ilnur M. Farrakhov","doi":"10.18599/grs.2023.3.17","DOIUrl":"https://doi.org/10.18599/grs.2023.3.17","url":null,"abstract":"The majority of reserves of small oil companies of the Republic of Tatarstan are represented by carbonate reservoirs with low filtration and capacitance properties, low reservoir pressures and high oil viscosity. All this leads to a rapid decrease and a low level of current oil flows. The Akan oil field of Predpriyatie Kara Altyn CJSC is one of the examples. Thermal methods are considered as the most effective technologies for deposits with high-viscosity oil. According to the results of laboratory study of various variants of thermal methods and geological and hydrodynamic modeling, the steam-cyclic method of development was determined as the most effective at the Akan field. Two producing directional wells and two horizontal wells have been selected for experimental work on steam injection. The article considers the downhole equipment used for injection heat carrier, describes the process of steam injection with the dynamics of controlled parameters, production indicators and efficiency after heat treatment of wells. Conclusions are presented for the completed works on wells.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039292","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}
Rodion V. Okunev, Elena V. Smirnova, Kamil G. Giniyatullin
The growing worldwide practice of biochar application as soil ameliorants, as well as adsorbents for remediation of soil contaminated with oil products and heavy metals, can lead to an increase the risk of environmental pollution by pyrolysis by-products. One of the most dangerous components of biochars is polycyclic aromatic hydrocarbons (PAHs), which are inevitably formed during the production of pyrogenic material. In this work, biochars obtained from various plant materials (millet, corn, willow, linden) under different pyrolysis temperatures were tested for the content of polycyclic aromatic hydrocarbons. The total content of PAHs in the studied samples ranged from 8.49 to 221.21 µg/kg, which does not exceed the limit concentrations established by the International Biochar Initiative. At the same time, polynuclear hydrocarbons with high carcinogenic and immunotoxic properties are found in the composition of biochars. A natural question arises about the effect of the final pyrolysis temperature on the total content and composition of PAHs in pyrolysis by-products. To study the degradation of polycyclic aromatic hydrocarbons in soil, linden biochar obtained by pyrolysis at 250 °C was used, from which the contaminants were extracted and applied to the soil so that the concentration of the marker was 20 and 40 µg/kg. The determination of the residual amount of polycyclic aromatic hydrocarbons was carried out after 1, 2, 6, and 11 months of incubation. Complete degradation of some 3–5-membered polycyclic aromatic hydrocarbons was found after 1–2 months of incubation. The most persistent pollutants were benzo(a)pyrene, benzo(b)fluoranthene, and pyrene, the concentration of which decreased to 31–71% on after 11 months of incubation. The slower degradation was found in the variant of the experiment with the high concentration level of polycyclic aromatic hydrocarbons. It was concluded that in soils selective accumulation of polynuclear PAHs, that most resistant to biodegradation, can occur.
{"title":"Evaluation of the content and degradation rates of PAHs in biochars, in terms of assessing the environmental risks of their application for soil remediation","authors":"Rodion V. Okunev, Elena V. Smirnova, Kamil G. Giniyatullin","doi":"10.18599/grs.2023.3.26","DOIUrl":"https://doi.org/10.18599/grs.2023.3.26","url":null,"abstract":"The growing worldwide practice of biochar application as soil ameliorants, as well as adsorbents for remediation of soil contaminated with oil products and heavy metals, can lead to an increase the risk of environmental pollution by pyrolysis by-products. One of the most dangerous components of biochars is polycyclic aromatic hydrocarbons (PAHs), which are inevitably formed during the production of pyrogenic material. In this work, biochars obtained from various plant materials (millet, corn, willow, linden) under different pyrolysis temperatures were tested for the content of polycyclic aromatic hydrocarbons. The total content of PAHs in the studied samples ranged from 8.49 to 221.21 µg/kg, which does not exceed the limit concentrations established by the International Biochar Initiative. At the same time, polynuclear hydrocarbons with high carcinogenic and immunotoxic properties are found in the composition of biochars. A natural question arises about the effect of the final pyrolysis temperature on the total content and composition of PAHs in pyrolysis by-products. To study the degradation of polycyclic aromatic hydrocarbons in soil, linden biochar obtained by pyrolysis at 250 °C was used, from which the contaminants were extracted and applied to the soil so that the concentration of the marker was 20 and 40 µg/kg. The determination of the residual amount of polycyclic aromatic hydrocarbons was carried out after 1, 2, 6, and 11 months of incubation. Complete degradation of some 3–5-membered polycyclic aromatic hydrocarbons was found after 1–2 months of incubation. The most persistent pollutants were benzo(a)pyrene, benzo(b)fluoranthene, and pyrene, the concentration of which decreased to 31–71% on after 11 months of incubation. The slower degradation was found in the variant of the experiment with the high concentration level of polycyclic aromatic hydrocarbons. It was concluded that in soils selective accumulation of polynuclear PAHs, that most resistant to biodegradation, can occur.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039347","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}
The issues of rational subsurface use, technological and economic reasons for non-fulfillment of project documentation decisions and their consequences at hydrocarbon deposits are considered. The change in oil recovery coefficients in the country over a seven-year period by reserve categories is given. Proposals are made to reduce the risks from inefficient development of subsurface resources in modern conditions.
{"title":"Issues of rational subsoil use in modern conditions","authors":"Andrey V. Davydov","doi":"10.18599/grs.2023.3.11","DOIUrl":"https://doi.org/10.18599/grs.2023.3.11","url":null,"abstract":"The issues of rational subsurface use, technological and economic reasons for non-fulfillment of project documentation decisions and their consequences at hydrocarbon deposits are considered. The change in oil recovery coefficients in the country over a seven-year period by reserve categories is given. Proposals are made to reduce the risks from inefficient development of subsurface resources in modern conditions.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037944","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}
Ivan S. Igonin, Evgeniy A. Zyza, Irina Yu. Kuleshova, Polina E. Zherzhova, Anna V. Kiryanina, Andrey N. Bondarev
A comprehensive analysis has been conducted on the geological structure of the entire Jurassic interval within the southwestern part of the South Taymyr Monocline, which has allowed a more precise understanding of the structure of the Khabei gas field and the identification of prospective objects of similar geological pattern. The study utilized CDP 2D seismic data, covering a total length of 7835 kilometers, as well as results from exploratory and appraisal drilling. Based on visual analysis of temporal cross-sections, an assumption has been made regarding the correlation between reservoir development zones and paleo-channel systems of the Lower-Middle Jurassic deposits. In order to identify and locate such systems, an analysis of temporal cross-sections, maps of total Jurassic deposit thickness, and maps of dynamic attributes were conducted. As a result, areas of development of large paleo-channel systems (paleo-valleys) within the South Taymyr Monocline have been delineated through integration. These identified zones are characterized by relatively shallow burial depths of up to 2.5 km, the absence of abnormally high reservoir pressures (AHBP), and comparably high filtration-capacity properties for Jurassic reservoirs (porosity – 22%, permeability – 25–50 mD). However, considering the complexity of these objects’ structures and the uncertainties caused by the low degree of geological-geophysical exploration in the study area, it is recommended to conduct additional seismic surveys (CDP 3D) to maturate the objects for exploration drilling.
{"title":"Hydrocarbon prospectivity of pinch-out zone of Jurassic deposits in Southwestern part of South Taimyr Monocline","authors":"Ivan S. Igonin, Evgeniy A. Zyza, Irina Yu. Kuleshova, Polina E. Zherzhova, Anna V. Kiryanina, Andrey N. Bondarev","doi":"10.18599/grs.2023.3.9","DOIUrl":"https://doi.org/10.18599/grs.2023.3.9","url":null,"abstract":"A comprehensive analysis has been conducted on the geological structure of the entire Jurassic interval within the southwestern part of the South Taymyr Monocline, which has allowed a more precise understanding of the structure of the Khabei gas field and the identification of prospective objects of similar geological pattern. The study utilized CDP 2D seismic data, covering a total length of 7835 kilometers, as well as results from exploratory and appraisal drilling. Based on visual analysis of temporal cross-sections, an assumption has been made regarding the correlation between reservoir development zones and paleo-channel systems of the Lower-Middle Jurassic deposits. In order to identify and locate such systems, an analysis of temporal cross-sections, maps of total Jurassic deposit thickness, and maps of dynamic attributes were conducted. As a result, areas of development of large paleo-channel systems (paleo-valleys) within the South Taymyr Monocline have been delineated through integration. These identified zones are characterized by relatively shallow burial depths of up to 2.5 km, the absence of abnormally high reservoir pressures (AHBP), and comparably high filtration-capacity properties for Jurassic reservoirs (porosity – 22%, permeability – 25–50 mD). However, considering the complexity of these objects’ structures and the uncertainties caused by the low degree of geological-geophysical exploration in the study area, it is recommended to conduct additional seismic surveys (CDP 3D) to maturate the objects for exploration drilling.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039889","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}
The article is devoted to the development of a methodology for predicting the properties of Achimov reservoirs based on cause-and-effect relationships such as the source of shelf sedimentary material, the geometry of clinoforms and the distance of alluvial fans to the slope. The technique was developed on the basis of physical laws, namely the conditions of disturbance of the gravitational equilibrium of sediments on the shelf edge – the moment of the beginning of the removal of sedimentary material and the process of cone formation caused by the deposition (braking) of sediments on the bottom of the basin. The methodology includes two stages for step-by-step theoretical justification and ease of understanding. At the first stage, the problem of disturbing the gravitational equilibrium of shelf sediments depending on the geometry of the clinoforms is solved. At the second stage, the problem of dependence of the distance of the blades on the slope and the properties of promising objects is considered. Based on theoretical concepts, the main conclusions about the dependence of the characteristics of alluvial fans (properties and volume of sandstone) on the geometric parameters of clinoforms and on the distance to the slope are outlined, and a complex parameter characterizing the properties of promising objects is derived. The methodology developed by the author makes it possible to predict, compare and rank Achimov objects according to their prospects both within one formation and as a whole in one or several fields.
{"title":"Physics of gravitational processes as a key to understanding the properties of Achimov deposits","authors":"Marina V. Osipova","doi":"10.18599/grs.2023.3.20","DOIUrl":"https://doi.org/10.18599/grs.2023.3.20","url":null,"abstract":"The article is devoted to the development of a methodology for predicting the properties of Achimov reservoirs based on cause-and-effect relationships such as the source of shelf sedimentary material, the geometry of clinoforms and the distance of alluvial fans to the slope. The technique was developed on the basis of physical laws, namely the conditions of disturbance of the gravitational equilibrium of sediments on the shelf edge – the moment of the beginning of the removal of sedimentary material and the process of cone formation caused by the deposition (braking) of sediments on the bottom of the basin. The methodology includes two stages for step-by-step theoretical justification and ease of understanding. At the first stage, the problem of disturbing the gravitational equilibrium of shelf sediments depending on the geometry of the clinoforms is solved. At the second stage, the problem of dependence of the distance of the blades on the slope and the properties of promising objects is considered. Based on theoretical concepts, the main conclusions about the dependence of the characteristics of alluvial fans (properties and volume of sandstone) on the geometric parameters of clinoforms and on the distance to the slope are outlined, and a complex parameter characterizing the properties of promising objects is derived. The methodology developed by the author makes it possible to predict, compare and rank Achimov objects according to their prospects both within one formation and as a whole in one or several fields.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135039891","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}
Natalia A. Lavrik, Natalia M. Litvinova, Alexandra V. Lavrik
The gold-placer deposit of Pokrovsky-Verny streams is formed on the southern slope of Belaya Gora (Khabarovsk Krai), where streams drain gold formations of the same-name deposit. The gold content in the waste dumps of past years often reaches commercial concentrations, which allows to be re-processed them and some of the gold goes back into the dumps. The field formed by ore and alluvial formations is a complex volcanic structure with a concentric-zone structure underlined by faults. At the initial stage of research, the goal was to determine the content of the precious metal in gravity concentrate samples from the placers, the study of the mineralogical and technological characteristics of gold going into dumps. 135 gold grains ranging in size from 10–15 µm to 3 mm were studied using an electron scanning microscope. Six main species were distinguished by composition and morphology: high-grade in the form of isometric crystals; aggregates of gold crystals with 0–29% silver admixture; dendrites with up to 41% silver admixture; grayish gold and silver amalgams; loose weishanite (Au,Ag)3Hg2 formations of gray color; aggregates of ore-bearing and nonmetalliferous minerals with gold, in which the precious metal is less than half the grain. All gold grains have a flattened shape, variably contain inclusions of clay minerals, quartz, hematite, ilmenite, magnetite, limonite. Grains of native metals and intermetallic compounds are isolated in mineral association with gold. The revealed features of gold show that the formation of the precious metal is associated with hypogenic and epithermal processes, as well as with fluid emanations coming through late deep faults. Effective gold recovery requires several stages mineral processing.
{"title":"Mineralogical and technological features of gold from placers of the southern slope of Belaya Gora (Khabarovsk Krai) and stages of its formation","authors":"Natalia A. Lavrik, Natalia M. Litvinova, Alexandra V. Lavrik","doi":"10.18599/grs.2023.3.23","DOIUrl":"https://doi.org/10.18599/grs.2023.3.23","url":null,"abstract":"The gold-placer deposit of Pokrovsky-Verny streams is formed on the southern slope of Belaya Gora (Khabarovsk Krai), where streams drain gold formations of the same-name deposit. The gold content in the waste dumps of past years often reaches commercial concentrations, which allows to be re-processed them and some of the gold goes back into the dumps. The field formed by ore and alluvial formations is a complex volcanic structure with a concentric-zone structure underlined by faults. At the initial stage of research, the goal was to determine the content of the precious metal in gravity concentrate samples from the placers, the study of the mineralogical and technological characteristics of gold going into dumps. 135 gold grains ranging in size from 10–15 µm to 3 mm were studied using an electron scanning microscope. Six main species were distinguished by composition and morphology: high-grade in the form of isometric crystals; aggregates of gold crystals with 0–29% silver admixture; dendrites with up to 41% silver admixture; grayish gold and silver amalgams; loose weishanite (Au,Ag)3Hg2 formations of gray color; aggregates of ore-bearing and nonmetalliferous minerals with gold, in which the precious metal is less than half the grain. All gold grains have a flattened shape, variably contain inclusions of clay minerals, quartz, hematite, ilmenite, magnetite, limonite. Grains of native metals and intermetallic compounds are isolated in mineral association with gold. The revealed features of gold show that the formation of the precious metal is associated with hypogenic and epithermal processes, as well as with fluid emanations coming through late deep faults. Effective gold recovery requires several stages mineral processing.","PeriodicalId":43752,"journal":{"name":"Georesursy","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135038996","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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