| 湖南保靖地区震旦系陡山沱组页岩气成藏地质条件分析 |
| |
| 引用本文： | 李斌,崔春兰,张跃恒,胡博文,罗群.湖南保靖地区震旦系陡山沱组页岩气成藏地质条件分析[J].沉积与特提斯地质,2019,39(1):60-67. |
| |
| 作者姓名： | 李斌 崔春兰 张跃恒 胡博文 罗群 |
| |
| 作者单位： | 神华地质勘查有限责任公司;中国石油大学(北京) |
| |
| 基金项目： | 国家自然科学基金“云质岩致密油储层微米-纳米孔喉网络体系及其流体耦合流动机理与流动下限”（41372145） |
| |
| 摘 要： | 为评价湖南保靖地区震旦系陡山沱组页岩气勘探潜力,利用野外地质调查及页岩气井勘探成果资料,结合钻井岩心样品测试结果,研究了湖南保靖地区陡山沱组页岩储层发育的特征及其分布规律。湖南保靖震旦系陡山沱组发育被动大陆边缘浅水陆棚斜坡相灰色白云质灰岩、黑色碳质泥岩、黑色硅质岩、黑色硅质岩、深灰色泥晶灰岩、深灰色含钙碳质泥岩等。该页岩层分布稳定,厚度巨大(150～200m);有机碳含量较高(4.07%～10.25%),热演化程度较高(3.78%～4.97%),达到过成熟阶段;页岩孔隙度中等(0.19%～2.355%),渗透率极低(0.0005257～0.5910081 mD);脆性矿物含量较高(55.9%～84.5%),主要以石英、方解石、黄铁矿、斜长石为主;黏土矿物含量较低(16.5%～44.1%),以伊利石和伊蒙混层为主,经历了晚成岩作用阶段;储集空间主要有矿物溶蚀孔、有机质溶蚀孔、黄铁矿晶间孔、黏土矿物晶间孔、成岩解理缝及构造微裂缝等。综合研究分析认为,湖南保靖地区陡山沱组具有较好的页岩气成藏条件,可继续加大勘探力度。
|
| 关 键 词： | 页岩气 陡山沱组 成藏条件 沉积环境 储集空间 湖南保靖 |
| 收稿时间： | 2017/9/15 0:00:00 |
| 修稿时间： | 2018/3/15 0:00:00 |
The shale gas accumulation in the Sinian Doushantuo Formation in the Baojing region,Hunan |
| |
| LI Bin,CUI Chunlan,ZHANG Yueheng,HU Bowen,LUO Qun.The shale gas accumulation in the Sinian Doushantuo Formation in the Baojing region,Hunan[J].Sedimentary Geology and Tethyan Geology,2019,39(1):60-67. |
| |
| Authors: | LI Bin CUI Chunlan ZHANG Yueheng HU Bowen LUO Qun |
| |
| Institution: | 1. Shenhua Geological Exploration Co., Ltd., Beijing 100022, China;2. China University of Petroleum, Beijing 100049, China |
| |
| Abstract: | The development and distribution of the shale reservoirs in the Sinian Doushantuo Formation in the Baojing region, Hunan are examined on the basis of field geological investigation and analytical results of core samples so as to evaluate the exploration potential of the shale gas in the Doushantuo Formation, where there developed grey dolomitic limestone, black carbonaceous mudstone, black siliceous rocks, dark grey micritic limestone and dark grey calcium-bearing carbonaceous mudstone of the passive continental margin shallow shelf-slope facies. These shale reservoirs have tremendous thickness (150-200 m), higher organic carbon contents (4.07%-10.25%), and higher maturity (3.78%-4.97%), moderate porosity (0.19%-2.355%) and extremely low permeability (0.0005257-0.5910081 mD). The contents of the brittle minerals in the shale reservoirs are relatively higher, varying from 55.9% to 84.5%, and consist dominantly of quartz, calcite, pyrite and plagioclase, while the contents of the clay minerals are relatively lower, ranging from 16.5% to 44.1%, and mainly composed of illite, chlorite, mixed illite-montmorillonite beds and chlorite-montmorillonite beds, suggesting that the Sinian Doushantuo Formation went through the late diagenetic stages. The reservoir spaces include solution openings, organic matter solution openings, intercrystalline pores in pyrite and clay minerals, diagenetic cleavage cracks and structural microfractures. It is concluded from the results of research cited above that the Doushantuo Formation in the Baojing region is of favourable geological conditions for the shale gas accumulation, and thus may have the potential for further exploration in this region. |
| |
| Keywords: | shale gas Doushantuo Formation accumulation sedimentary environment reservoir space Baojing in Hunan |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《沉积与特提斯地质》浏览原始摘要信息 |
| 点击此处可从《沉积与特提斯地质》下载免费的PDF全文 |
|
