Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia)
Оbject. The article presents the results of studies of secondary mineral formation in the lower Cretaceous sediments of the Bolshekhetskaya depression, which contain highly promising oil and gas deposits, with established industrial performance at Pyakyakhinskoye, Khalmerpayutinskoye and South-Messo...
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| Format: | Article |
| Language: | English |
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A.N. Zavaritsky Institute of Geology and Geochemistry
2019-03-01
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| Series: | Литосфера |
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| Online Access: | https://www.lithosphere.ru/jour/article/view/1145 |
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| author | Yu. V. Titov G. Kh. Shaikhutdinova S. V. Astarkin V. V. Kolpakov N. V. Kozhevnikova |
| author_facet | Yu. V. Titov G. Kh. Shaikhutdinova S. V. Astarkin V. V. Kolpakov N. V. Kozhevnikova |
| author_sort | Yu. V. Titov |
| collection | DOAJ |
| description | Оbject. The article presents the results of studies of secondary mineral formation in the lower Cretaceous sediments of the Bolshekhetskaya depression, which contain highly promising oil and gas deposits, with established industrial performance at Pyakyakhinskoye, Khalmerpayutinskoye and South-Messoyakhskoye fields. The objects under consideration are located in the most submerged part of the Nadym-Taz syneclise in the zone, where the Taz and Urengoy facies regions meet.Materials and methods. Main types of postsedimentary changes of reservoir rocks selected on the basis of study of core material Pokurskaya, Angelovskaya, Sortymskaya and Megionskaya fms. Petrography and Mineralogy of the rocks under consideration were studied on the basis of stage analysis using optical and electron microscopy, and X-ray diffraction study at the Center of core and reservoir fluids research of “LUKOIL-Engineering’s KogalymNIPIneft branch In Tyumen” (Kogalym). Determination of the mineral type of zeolite was performed by X-ray phase analysis at the Institute of Geology and Geochemistry UrO RAS (Ekaterinburg).Resuts. It was found that for rocks Pokurskaya, Angelovskaya, Sortymskaya and Megionskaya fms characteristic a diverse range of secondary minerals and structures, evidence of the background stage catagenesis and the superimposed processes. The most important among them is the regeneration of quartz, the transformation of feldspar, violation of the crystal structure of biotite, the formation of various clay minerals, crystallization of zeolites and calcite.Conclusions. Studies show that the upper part of the section of the lower Cretaceous deposits of Bolshekhetskaya depression corresponds to the area of the middle catagenesis (gradation MK2), the bottom – changed to the stage of deep catagenesis (gradation MK3). In this case, the epigenetic process proceeded unevenly, pulsation, due to changing tectonic conditions. Particular attention is paid to the origin of zeolites, which is still debatable. It is assumed that their formation is associated with the transformation of “camouflage pyroclastic” in particular, feldspar clastics. |
| first_indexed | 2024-12-13T15:48:27Z |
| format | Article |
| id | doaj.art-46f7952bfd4c4c7ba8db4ddcdcf0f49c |
| institution | Directory Open Access Journal |
| issn | 1681-9004 2500-302X |
| language | English |
| last_indexed | 2024-12-13T15:48:27Z |
| publishDate | 2019-03-01 |
| publisher | A.N. Zavaritsky Institute of Geology and Geochemistry |
| record_format | Article |
| series | Литосфера |
| spelling | doaj.art-46f7952bfd4c4c7ba8db4ddcdcf0f49c2022-12-21T23:39:37ZengA.N. Zavaritsky Institute of Geology and GeochemistryЛитосфера1681-90042500-302X2019-03-0101485810.24930/1681-9004-2019-19-1-48-581139Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia)Yu. V. Titov0G. Kh. Shaikhutdinova1S. V. Astarkin2V. V. Kolpakov3N. V. Kozhevnikova4Branch of ooo “LUKoiL-engineering” “KogalymNiPineft” in tyumenBranch of ooo “LUKoiL-engineering” “KogalymNiPineft” in tyumenBranch of ooo “LUKoiL-engineering” “KogalymNiPineft” in tyumenBranch of ooo “LUKoiL-engineering” “KogalymNiPineft” in tyumenBranch of ooo “LUKoiL-engineering” “KogalymNiPineft” in tyumenОbject. The article presents the results of studies of secondary mineral formation in the lower Cretaceous sediments of the Bolshekhetskaya depression, which contain highly promising oil and gas deposits, with established industrial performance at Pyakyakhinskoye, Khalmerpayutinskoye and South-Messoyakhskoye fields. The objects under consideration are located in the most submerged part of the Nadym-Taz syneclise in the zone, where the Taz and Urengoy facies regions meet.Materials and methods. Main types of postsedimentary changes of reservoir rocks selected on the basis of study of core material Pokurskaya, Angelovskaya, Sortymskaya and Megionskaya fms. Petrography and Mineralogy of the rocks under consideration were studied on the basis of stage analysis using optical and electron microscopy, and X-ray diffraction study at the Center of core and reservoir fluids research of “LUKOIL-Engineering’s KogalymNIPIneft branch In Tyumen” (Kogalym). Determination of the mineral type of zeolite was performed by X-ray phase analysis at the Institute of Geology and Geochemistry UrO RAS (Ekaterinburg).Resuts. It was found that for rocks Pokurskaya, Angelovskaya, Sortymskaya and Megionskaya fms characteristic a diverse range of secondary minerals and structures, evidence of the background stage catagenesis and the superimposed processes. The most important among them is the regeneration of quartz, the transformation of feldspar, violation of the crystal structure of biotite, the formation of various clay minerals, crystallization of zeolites and calcite.Conclusions. Studies show that the upper part of the section of the lower Cretaceous deposits of Bolshekhetskaya depression corresponds to the area of the middle catagenesis (gradation MK2), the bottom – changed to the stage of deep catagenesis (gradation MK3). In this case, the epigenetic process proceeded unevenly, pulsation, due to changing tectonic conditions. Particular attention is paid to the origin of zeolites, which is still debatable. It is assumed that their formation is associated with the transformation of “camouflage pyroclastic” in particular, feldspar clastics.https://www.lithosphere.ru/jour/article/view/1145bolshekhetskaya depressionlower сretaceousterrigenous rocksautigenic mineralscatagenesis |
| spellingShingle | Yu. V. Titov G. Kh. Shaikhutdinova S. V. Astarkin V. V. Kolpakov N. V. Kozhevnikova Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) Литосфера bolshekhetskaya depression lower сretaceous terrigenous rocks autigenic minerals catagenesis |
| title | Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) |
| title_full | Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) |
| title_fullStr | Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) |
| title_full_unstemmed | Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) |
| title_short | Manifestations of post-sedimentation processes in the Lower Cretaceous sediments of Bolshekhetskaya depression (Western Siberia) |
| title_sort | manifestations of post sedimentation processes in the lower cretaceous sediments of bolshekhetskaya depression western siberia |
| topic | bolshekhetskaya depression lower сretaceous terrigenous rocks autigenic minerals catagenesis |
| url | https://www.lithosphere.ru/jour/article/view/1145 |
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