油气藏评价与开发 >
2022 , Vol. 12 >Issue 1: 119 - 129
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2022.01.010
重庆市綦江区页岩地质特征及其对页岩气勘探的启示
收稿日期: 2021-11-12
网络出版日期: 2022-03-24
基金资助
中国石化科技项目“南川复杂构造带页岩气勘探开发关键技术”(P19017-3);中国石化科技项目“南川—武隆地区常压页岩气富集高产机理与目标评价”(P21087-6);中国石化科技项目“华东探区天然气富集规律与目标评价”(P20059-6);国家科技重大专项“彭水地区常压页岩气勘探开发示范工程”(2016ZX05061)
Geological characteristic and its implications of shale exploration in Qijiang, Chongqing, China
Received date: 2021-11-12
Online published: 2022-03-24
通过野外剖面观察和实测,对重庆市綦江区安稳镇上奥陶统五峰组—下志留统龙马溪组页岩剖面进行了详细野外描述与实验分析等综合研究,安稳镇页岩剖面自下而上出露五峰组下部黑色硅质页岩、五峰组上部观音桥段深灰色介壳泥质灰岩、龙马溪组黑色页岩等岩性地层。主要有以下3点结论：①出露页岩段为当前勘探开发的主要层段,各项表征成藏条件的评价指标优越,TOC（总有机碳）含量为1.10 %~8.10 %,平均为3.40 %,有机质成熟度（Ro）平均为2.70 %,石英含量为33.90 %~56.60 %,平均为42.36 %,黏土含量为18.00 %~57.20 %,平均为42.62 %;②储集空间类型主要为微裂缝、有机质孔与无机质孔;③结合勘探开发实践,剖面五峰组—龙马溪组下部①—③小层黑色页岩为甜点段,是水平井轨迹有利穿行层段。
高玉巧 , 刘娜娜 , 张培先 , 何贵松 , 高全芳 . 重庆市綦江区页岩地质特征及其对页岩气勘探的启示[J]. 油气藏评价与开发, 2022 , 12(1) : 119 -129 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.01.010
Detailed field description and experimental analysis have been carried out for Wufeng-Longmaxi Formation shale profile in Anwen Town, Qijiang, Chongqing, by field profile observations and field measurements. Three kinds of lithology formation, namely black siliceous shale of Wufeng Formation, dark gray shell argillaceous limestone of Guanyinqiao and black shale of Longmaxi Formation,are exposed from bottom to top in shale section of Anwen Town. There are three main conclusions. First, the exposed shale is the main formation of current exploration and development, the indicators of reservoir forming conditions are superior, TOC ranges from 1.10 % to 8.10 %, with an average of 3.40 %. The average Ro is 2.70 %; Quartz content ranges from 33.90 % to 56.60 %, with an average of 42.36 %, and clay content ranges from 18.00 % to 57.20 %, with an average of 42.62 %. Second, the main reservoir space types are microfracture, organic pore and inorganic pore. Third, combined with the exploration and development practice, the ①~③ subzone of black shale at the lower part of Wufeng-Longmaxi Formation is the sweet spot section, which is a favorable target of horizontal well.
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