Pore structures and Seepage Characteristics of Sand-conglomerate Reservoirs of Baikouquan Formation in Triassic Mahu Sag, Northwestern Margin of Junggar Basin

FU Yu; LIU Yiqun; JIANG Yiqin; YANG Zhao; YANG Yiyao; YUE Zhenqi; QIAO Jianhua; SONG Shijun

doi:10.19751/j.cnki.61-1149/p.2020.02.014

Northwestern Geology > 2020 > 53(2): 223-234. > DOI: 10.19751/j.cnki.61-1149/p.2020.02.014

FU Yu, LIU Yiqun, JIANG Yiqin, et al. Pore structures and Seepage Characteristics of Sand-conglomerate Reservoirs of Baikouquan Formation in Triassic Mahu Sag, Northwestern Margin of Junggar Basin[J]. Northwestern Geology, 2020, 53(2): 223-234. DOI: 10.19751/j.cnki.61-1149/p.2020.02.014

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Pore structures and Seepage Characteristics of Sand-conglomerate Reservoirs of Baikouquan Formation in Triassic Mahu Sag, Northwestern Margin of Junggar Basin

1. State key laboratory of Continental Dynamics, Department of Geology, Northwestern University, Xi'an 710064, Shaanxi, China;
2. No.9 oil Production Company of Petrochina Chang Qing Oilfield, Yinchuan 750006, Ningxia, China;
3. XinJiang Oilfield Company of Petrochina, Karamay 834000, Xinjiang, China

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Received Date: April 13, 2019
Revised Date: October 20, 2019
Available Online: July 28, 2022
Published Date: June 04, 2020

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Abstract

Abstract

The Triassic Baikouquan Formation in the slope area of the Mahu sag belongs to the tight glutenite reservoir. In order to discuss the pore structure type of the reservoir and its relationship with oil content in the study area, the characteristics of petrology, pore structure, seepage, and oil-bearing properties were studied by using the experimental methods of thin sections, high pressure mercury intrusion, nuclear magnetic resonance and visualized water flooding. The results show that the types of pore reservoirs in glutenite can be divided into residual intergranular, intragranular dissolved, intercrystalline pores and micro-cracks; the pore throat types are mainly sheet-like, point-like and bundle-like throats. The pore structure is divided into four categories. As pore structure tends worse, the oil content and the seepage capacity also gradually deteriorates.
- Mahu sag,
- glutenite reservoir,
- pore structure,
- seepage characteristics

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References (44)

References

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Pore structures and Seepage Characteristics of Sand-conglomerate Reservoirs of Baikouquan Formation in Triassic Mahu Sag, Northwestern Margin of Junggar Basin

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Pore structures and Seepage Characteristics of Sand-conglomerate Reservoirs of Baikouquan Formation in Triassic Mahu Sag, Northwestern Margin of Junggar Basin

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