新疆石油地质 ›› 2023, Vol. 44 ›› Issue (4): 392-403.doi: 10.7657/XJPG20230402
孔祥晔1a,1b(), 曾溅辉1a,1b(
), 罗群1c, 谭杰2, 张芮2, 王鑫1a,1b, 王乾右1c
收稿日期:
2022-07-01
修回日期:
2022-08-09
出版日期:
2023-08-01
发布日期:
2023-08-01
通讯作者:
曾溅辉(1962-),男,江西新干人,教授,博士,石油地质,(E-mail)作者简介:
孔祥晔(1990-),男,四川遂宁人,博士研究生,石油地质,(Tel)15611818520(E-mail)基金资助:
KONG Xiangye1a,1b(), ZENG Jianhui1a,1b(
), LUO Qun1c, TAN Jie2, ZHANG Rui2, WANG Xin1a,1b, WANG Qianyou1c
Received:
2022-07-01
Revised:
2022-08-09
Online:
2023-08-01
Published:
2023-08-01
摘要:
页岩储集层的油气储集能力取决于其复杂的孔隙结构,而不同页岩岩相具有不同的孔隙结构特征。为了明确不同页岩岩相对孔隙结构的控制作用,以川中地区侏罗系自流井组大安寨段页岩为例,基于总有机碳含量和X射线衍射全岩矿物分析,确定大安寨段页岩岩相,对不同页岩岩相进行薄片、扫描电镜、低温氮气吸附和高压压汞分析,确定其孔隙结构特征。结果表明,川中地区大安寨段页岩主要发育6种岩相:富有机质黏土质页岩、含有机质黏土质页岩、贫有机质黏土质页岩、含有机质混合质页岩、贫有机质混合质页岩和贫有机质钙质页岩,孔隙形态以平行板状和狭缝状为主。黏土质页岩主要发育黏土矿物层间孔、有机质孔和生烃增压缝,混合质页岩主要发育残余粒间孔,钙质页岩发育少量溶蚀孔。各类页岩岩相的孔体积和比表面积与黏土矿物含量呈正相关,富有机质黏土质页岩大孔孔体积与总有机碳含量呈正相关。其中,富有机质黏土质页岩大孔孔体积最大,孔径分布呈三峰特征,是川中地区大安寨段页岩油储集最为有利的页岩岩相。
中图分类号:
孔祥晔, 曾溅辉, 罗群, 谭杰, 张芮, 王鑫, 王乾右. 川中地区大安寨段陆相页岩岩相对孔隙结构的控制作用[J]. 新疆石油地质, 2023, 44(4): 392-403.
KONG Xiangye, ZENG Jianhui, LUO Qun, TAN Jie, ZHANG Rui, WANG Xin, WANG Qianyou. Controls of Continental Shale Lithofacies on Pore Structure of Jurassic Da’anzhai Member in Central Sichuan Basin[J]. Xinjiang Petroleum Geology, 2023, 44(4): 392-403.
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