Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin
Diagenetic densification process of dense reservoirs in Yanchang Formation of southwest Ordos Basin since burial has been deeply studied based on a large number of core observation,slice identification,scanning electron microscopy and core physical analysis.The compaction was the main effect of the...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2018-04-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/128 |
| _version_ | 1798017751396122624 |
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| author | Zhao Yue Wang Yanbin Zhong Dakang Xu Qiang Zhao Xin Huo Chao |
| author_facet | Zhao Yue Wang Yanbin Zhong Dakang Xu Qiang Zhao Xin Huo Chao |
| author_sort | Zhao Yue |
| collection | DOAJ |
| description | Diagenetic densification process of dense reservoirs in Yanchang Formation of southwest Ordos Basin since burial has been deeply studied based on a large number of core observation,slice identification,scanning electron microscopy and core physical analysis.The compaction was the main effect of the densification,and the cementation caused the reservoir porosity and permeability to deteriorate further on the basis of compaction.Calcium,siliceous cementation has a significant effect on the porosity reduction,and cementation of illite in clay minerals blocked the throats has a great effect on permeability.According to the changes of detrital minerals and interstitial fillings during diagenesis,the changes of reservoir physical properties were discussed from the microcosmos view.The porosity of each diagenetic period was calculated and the permeability was estimated by curve fitting between porosity and permeability.The reservoir permeability decreased to 0.27×10<sup>-3</sup> μm<sup>2</sup> at the end of the acidic dissolution stage(mid-diagenetic stage A1),which was lower than the critical dense reservoir permeability of 0.3×10<sup>-3</sup> μm<sup>2</sup>,and at which time the tight reservoir had been formed.Combined with the inclusions test,coupled dense history and buried history of reservoir,it was presumed that a large-scale ripening oil filling had begun before the reservoir reached permeability threshold.After the formation of dense reservoirs,oil and gas filling did not stop immediately.Densification and reservoir-forming should be almost at the same time,and oil accumulation continues after densification. |
| first_indexed | 2024-04-11T16:12:40Z |
| format | Article |
| id | doaj.art-f304baf3a22846ebaccfa0f3e36fe006 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-11T16:12:40Z |
| publishDate | 2018-04-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-f304baf3a22846ebaccfa0f3e36fe0062022-12-22T04:14:40ZengEmergency Management Press矿业科学学报2096-21932018-04-013210611810.19606/j.cnki.jmst.2018.02.00220180202Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos BasinZhao Yue0Wang Yanbin1Zhong Dakang2Xu Qiang3Zhao Xin4Huo Chao5College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaCollege of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Earth Science, China University of Petroleum, Beijing 102249, ChinaGeneral Prospecting Institute China National Administration of Coal Geology, Beijing 100039, ChinaGeneral Prospecting Institute China National Administration of Coal Geology, Beijing 100039, ChinaGeneral Prospecting Institute China National Administration of Coal Geology, Beijing 100039, ChinaDiagenetic densification process of dense reservoirs in Yanchang Formation of southwest Ordos Basin since burial has been deeply studied based on a large number of core observation,slice identification,scanning electron microscopy and core physical analysis.The compaction was the main effect of the densification,and the cementation caused the reservoir porosity and permeability to deteriorate further on the basis of compaction.Calcium,siliceous cementation has a significant effect on the porosity reduction,and cementation of illite in clay minerals blocked the throats has a great effect on permeability.According to the changes of detrital minerals and interstitial fillings during diagenesis,the changes of reservoir physical properties were discussed from the microcosmos view.The porosity of each diagenetic period was calculated and the permeability was estimated by curve fitting between porosity and permeability.The reservoir permeability decreased to 0.27×10<sup>-3</sup> μm<sup>2</sup> at the end of the acidic dissolution stage(mid-diagenetic stage A1),which was lower than the critical dense reservoir permeability of 0.3×10<sup>-3</sup> μm<sup>2</sup>,and at which time the tight reservoir had been formed.Combined with the inclusions test,coupled dense history and buried history of reservoir,it was presumed that a large-scale ripening oil filling had begun before the reservoir reached permeability threshold.After the formation of dense reservoirs,oil and gas filling did not stop immediately.Densification and reservoir-forming should be almost at the same time,and oil accumulation continues after densification.http://kykxxb.cumtb.edu.cn/article/id/128ordos basintight sandstonediagenesis and pore evolutiondense accumulation sequence |
| spellingShingle | Zhao Yue Wang Yanbin Zhong Dakang Xu Qiang Zhao Xin Huo Chao Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin 矿业科学学报 ordos basin tight sandstone diagenesis and pore evolution dense accumulation sequence |
| title | Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin |
| title_full | Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin |
| title_fullStr | Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin |
| title_full_unstemmed | Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin |
| title_short | Study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling:A case from the Yanchang Formation,Ordos Basin |
| title_sort | study on the relationship between tight sandstone reservoirdiagenetic evolution and hydrocarbon reservoirs filling a case from the yanchang formation ordos basin |
| topic | ordos basin tight sandstone diagenesis and pore evolution dense accumulation sequence |
| url | http://kykxxb.cumtb.edu.cn/article/id/128 |
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