| 联合高压压汞和恒速压汞实验表征致密砂岩孔喉特征 |
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| 引用本文： | 张文凯,施泽进,田亚铭,谢丹,李文杰.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,2021,28(1):14-20,32. |
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| 作者姓名： | 张文凯 施泽进 田亚铭 谢丹 李文杰 |
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| 作者单位： | 成都理工大学能源学院,四川成都610059;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;成都理工大学能源学院,四川成都610059;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;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;中国石化西南油气分公司勘探开发研究院,四川成都610041;成都理工大学能源学院,四川成都610059;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 |
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| 基金项目： | 国家科技重大专项课题"四川盆地碎屑岩层系油气富集规律与勘探评价";国家自然科学基金面上项目"四川盆地东南部及周缘震旦系-寒武系微生物岩成岩作用与孔隙演化" |
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| 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50～260μm,喉道半径为0.004～50.000 μm.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...
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| 关 键 词： | 致密砂岩 孔喉结构 高压压汞 恒速压汞 小河坝组 |
The combination of high-pressure mercury injection and rate-controlled mercury injection to characterize the pore-throat structure in tight sandstone reservoirs |
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| ZHANG Wenkai,SHI Zejin,TIAN Yaming,XIE Dan,LI Wenjie.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 & Gas Field,2021,28(1):14-20,32. |
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| Authors: | ZHANG Wenkai SHI Zejin TIAN Yaming XIE Dan LI Wenjie |
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| Affiliation: | (College of Energy Resources,Chengdu University of Technology,Chengdu 610059,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation of Ministry of Natural Resource,Chengdu University of Technology,Chengdu 610059,China;Research Institute of Exploration and Development,Southwest Oil&Gas Company,SINOPEC,Chengdu 610041,China) |
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| 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 50μm to 260μm and the throat radius ranges from 0.004μm to 50.000μm.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^-3μm^2),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<0.1μm)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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| Keywords: | tight sandstone pore-throat structure high-pressure mercury injection rate-controlled mercury injection Xiaoheba Formation |
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