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[1]张文凯,施泽进,田亚铭,等.联合高压压汞和恒速压汞实验表征致密砂岩孔喉特征[J].断块油气田,2021,(01):14-20，32.[doi:10.6056/dkyqt202101003]
　ZHANG Wenkai,SHI Zejin,TIAN Yaming,et al.The combination of high-pressure mercury injection and rate-controlled mercury injection to characterize the pore-throat structure in tight sandstone reservoirs[J].Fault-Block Oil and Gas Field,2021,(01):14-20，32.[doi:10.6056/dkyqt202101003]
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联合高压压汞和恒速压汞实验表征致密砂岩孔喉特征(PDF)
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《断块油气田》[ISSN:1005-8907/CN:41-1219/TE]

卷:
期数:
2021年01
页码:
14-20，32
栏目:
地质勘探
出版日期:
2021-01-25

文章信息/Info

Title:
The combination of high-pressure mercury injection and rate-controlled mercury injection to characterize the pore-throat structure in tight sandstone reservoirs
文章编号:
3
作者:
张文凯1; 2; 施泽进1; 2; 田亚铭3; 谢丹4; 李文杰1; 2
1.成都理工大学能源学院，四川 成都 610059；2.成都理工大学油气藏地质及开发工程国家重点实验室，四川 成都 610059； 3.成都理工大学自然资源部构造成矿成藏重点实验室，四川 成都 610059；4.中国石化西南油气分公司勘探开发研究院，四川 成都 610041
Author(s):
ZHANG Wenkai1; 2;  SHI Zejin1; 2;  TIAN Yaming3;  XIE Dan4;  LI Wenjie1; 2
2.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China; 3.Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation of Ministry of Natural Resource, Chengdu University of Technology, Chengdu 610059, China; 4.Research Institute of Exploration and Development, Southwest Oil & Gas Company, SINOPEC, Chengdu 610041, China
关键词:
致密砂岩; 孔喉结构; 高压压汞; 恒速压汞; 小河坝组
Keywords:
tight sandstone;  pore-throat structure;  high-pressure mercury injection;  rate-controlled mercury injection;  Xiaoheba Formation
分类号:
TE122.2+3
DOI:
10.6056/dkyqt202101003
文献标志码:
A
摘要:
文中利用铸体薄片、扫描电镜、高压压汞和恒速压汞技术，定量研究了四川盆地下志留统小河坝组致密砂岩储层的孔喉结构特征。通过联合高压压汞和恒速压汞实验，有效表征了小河坝组砂岩的总孔喉大小，其中孔隙半径为50~260 ?滋m，喉道半径为0.004~50.000 ?滋m。总体而言，致密砂岩渗透率（K）主要受控于小部分（小于40％）较粗的孔喉。对于渗透率良好的致密砂岩（K>0.1×10-3 ?滋m2），较大的微孔和中孔是渗透率贡献的主体；反之，渗透率则主要受控于较大的纳米孔。此外，尽管大量小孔喉（半径小于0.1 ?滋m）对储层孔隙度和渗透率都有一定贡献，但对前者贡献远大于对后者贡献。
Abstract:
In this paper, the pore-throat structure in tight sandstone reservoirs in Lower Silurian Xiaoheba Formation in Sichuan Basin are studied by means of casting thin slices, scanning electron microscope, high-pressure mercury injection (HPMI) and rate-controlled mercury injection (RCMI). The combination of the HPMI and RCMI experiment effectively reveals the total pore-throat size in the Xiaoheba Formation sandstones, and the pore radius ranges from 50 um to 260 um and the throat radius ranges from 0.004 um to 50.000 um. Overall, the permeability(K) of the tight sandstones is mostly affected by the small fraction (<40%) of relatively wide pore-throats. For the tight sandstones with good permeability (K>0.1×10-3 μm2), the larger micropores and mesopores exert a great influence on the permeability. In contrast, the permeability is mainly influenced by the larger nanopores. Furthermore, although the large number of narrow pore-throats (radius<0.1 um) make a certain contribution to both reservoir porosity and permeability, their contribution to the former is far more than to the latter.

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备注/Memo

备注/Memo:
更新日期/Last Update: 2021-01-25