Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag
In order to more comprehensively characterize the pore structure characteristics of Qianjiang Formation shale oil reservoir in Qianjiang Sag, several shale samples from Well A and Well B with different distances from the source were systematically selected for analyzing and testing, and the pore str...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Bulletin of Geological Science and Technology
2021-09-01
|
| Series: | 地质科技通报 |
| Subjects: | |
| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0022 |
| _version_ | 1797277493984493568 |
|---|---|
| author | Hongbin Zeng Furong Wang Jing Luo Tao Tao Shiqiang Wu |
| author_facet | Hongbin Zeng Furong Wang Jing Luo Tao Tao Shiqiang Wu |
| author_sort | Hongbin Zeng |
| collection | DOAJ |
| description | In order to more comprehensively characterize the pore structure characteristics of Qianjiang Formation shale oil reservoir in Qianjiang Sag, several shale samples from Well A and Well B with different distances from the source were systematically selected for analyzing and testing, and the pore structure characteristics of shale were comprehensively analyzed by field emission scanning electron microscope, low temperature nitrogen adsorption and mercury intrusion capillary pressure experiment; Making a further study by comparing the field emission scanning electron microscope images, low-temperature nitrogen adsorption and mercury intrusion capillary pressure experimental data on the occurrence space characteristics of retained hydrocarbons in shale; The pore size distribution of connected pores in shale is discussed through the secondary mercury injection experiments on typical shale samples.This study shows that the pore size of Qianjiang Formation shale oil reservoir in Qianjiang Sag is nanometer micron scale, and 2-180 nm clay mineral interlayer pore and dolomite intergranular pore are the two main pore types in this area; The retained hydrocarbon in Well A shale mainly exists in 2-20 nm clay mineral interlayer pores, the content of retained hydrocarbon is low, and the connected pore size is mainly concentrated in the range of 3-15 nm.The retained hydrocarbon in Well B shale mainly exists in 8-100 nm dolomite intergranular pores, the amount of retained hydrocarbon is large, and the connected pore size is mainly distributed in the range of 10-130 nm.The existence of dolomite and clay minerals is conducive to the development of shale reservoir space, but the biogenic dolomite far away from the source is more conducive to the occurrence and mobility of retained hydrocarbon.The research results can provide theoretical support for the exploration and development of shale oil in Qianjiang Sag. |
| first_indexed | 2024-03-07T15:49:16Z |
| format | Article |
| id | doaj.art-45b26700551e43c0a73b09c8119ba494 |
| institution | Directory Open Access Journal |
| issn | 2096-8523 |
| language | zho |
| last_indexed | 2024-03-07T15:49:16Z |
| publishDate | 2021-09-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
| record_format | Article |
| series | 地质科技通报 |
| spelling | doaj.art-45b26700551e43c0a73b09c8119ba4942024-03-05T03:04:01ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232021-09-0140524225210.19509/j.cnki.dzkq.2021.0022dzkjtb-40-5-242Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang SagHongbin Zeng0Furong Wang1Jing Luo2Tao Tao3Shiqiang Wu4Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience(Wuhan), Wuhan 430074, ChinaKey Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience(Wuhan), Wuhan 430074, ChinaKey Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience(Wuhan), Wuhan 430074, ChinaKey Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience(Wuhan), Wuhan 430074, ChinaResearch Institute of Exploration and Development, SINOPEC Jianghan Oilfield Branch Company, Wuhan 430223, ChinaIn order to more comprehensively characterize the pore structure characteristics of Qianjiang Formation shale oil reservoir in Qianjiang Sag, several shale samples from Well A and Well B with different distances from the source were systematically selected for analyzing and testing, and the pore structure characteristics of shale were comprehensively analyzed by field emission scanning electron microscope, low temperature nitrogen adsorption and mercury intrusion capillary pressure experiment; Making a further study by comparing the field emission scanning electron microscope images, low-temperature nitrogen adsorption and mercury intrusion capillary pressure experimental data on the occurrence space characteristics of retained hydrocarbons in shale; The pore size distribution of connected pores in shale is discussed through the secondary mercury injection experiments on typical shale samples.This study shows that the pore size of Qianjiang Formation shale oil reservoir in Qianjiang Sag is nanometer micron scale, and 2-180 nm clay mineral interlayer pore and dolomite intergranular pore are the two main pore types in this area; The retained hydrocarbon in Well A shale mainly exists in 2-20 nm clay mineral interlayer pores, the content of retained hydrocarbon is low, and the connected pore size is mainly concentrated in the range of 3-15 nm.The retained hydrocarbon in Well B shale mainly exists in 8-100 nm dolomite intergranular pores, the amount of retained hydrocarbon is large, and the connected pore size is mainly distributed in the range of 10-130 nm.The existence of dolomite and clay minerals is conducive to the development of shale reservoir space, but the biogenic dolomite far away from the source is more conducive to the occurrence and mobility of retained hydrocarbon.The research results can provide theoretical support for the exploration and development of shale oil in Qianjiang Sag.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0022shale pore structurehigh-pressure mercury injectionnitrogen adsorptionshale oil reservoirqianjiang sagjianghan basin |
| spellingShingle | Hongbin Zeng Furong Wang Jing Luo Tao Tao Shiqiang Wu Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag 地质科技通报 shale pore structure high-pressure mercury injection nitrogen adsorption shale oil reservoir qianjiang sag jianghan basin |
| title | Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag |
| title_full | Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag |
| title_fullStr | Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag |
| title_full_unstemmed | Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag |
| title_short | Characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in Qianjiang Sag |
| title_sort | characteristics of pore structure of intersalt shale oil reservoir by low temperature nitrogen adsorption and high pressure mercury pressure methods in qianjiang sag |
| topic | shale pore structure high-pressure mercury injection nitrogen adsorption shale oil reservoir qianjiang sag jianghan basin |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2021.0022 |
| work_keys_str_mv | AT hongbinzeng characteristicsofporestructureofintersaltshaleoilreservoirbylowtemperaturenitrogenadsorptionandhighpressuremercurypressuremethodsinqianjiangsag AT furongwang characteristicsofporestructureofintersaltshaleoilreservoirbylowtemperaturenitrogenadsorptionandhighpressuremercurypressuremethodsinqianjiangsag AT jingluo characteristicsofporestructureofintersaltshaleoilreservoirbylowtemperaturenitrogenadsorptionandhighpressuremercurypressuremethodsinqianjiangsag AT taotao characteristicsofporestructureofintersaltshaleoilreservoirbylowtemperaturenitrogenadsorptionandhighpressuremercurypressuremethodsinqianjiangsag AT shiqiangwu characteristicsofporestructureofintersaltshaleoilreservoirbylowtemperaturenitrogenadsorptionandhighpressuremercurypressuremethodsinqianjiangsag |