下扬子巢湖-泾县地区上二叠统大隆组泥页岩储层特征  

The shale reservoir characteristic of Dalong Formation Upper Permian in Chaohu-Jingxian,Lower Yangtze area

作　　者：陈平[1] 张敏强 许永哲[1] 刘金水 杜学斌[1] 胡小辉[1] 陆永潮[1] 

机构地区：[1]中国地质大学油气与构造教育部重点实验室,武汉430074 [2]中海石油(中国)有限公司上海分公司,上海200030

出　　处：《岩石学报》2013年第8期2925-2935,共11页Acta Petrologica Sinica

基　　金：国家自然科学基金项目(41202086)资助

摘　　要：基于实测剖面资料,对下扬子巢湖-泾县地区上二叠统大隆组泥页岩储层特征进行了研究。结果表明,研究区大隆组厚12～35m,沉积时期处于水体贫氧-厌氧的静水还原环境,为一套黑色碳质硅质泥页岩建造。页岩中钙硅质脆性矿物含量为65%～93%,粘土矿物含量5%～30%,总有机碳含量在2.05%～13.9%,有机质成熟度为1.45%～2%,属于成熟-过成熟演化阶段。大隆组泥页岩储层孔隙度为0.476%,渗透率为0.001×10-3μm2,主要发育四类微孔(裂)隙:残余原生孔隙、次生溶蚀孔隙、次生晶间孔和微裂隙(缝)。"高硅、高脆、高有机质丰度、孔隙发育"的四大储集特性表明大隆组海相黑色岩系具良好的勘探开发前景。Based on the measured outcrop profiles,the shale reservoir characteristics of Dalong Formation in Chaohu-Jingxian area were analyzed. The result shows that with a thickness of 12 ～ 35m,the Dalong Formation were deposited in a lean oxygen-anaerobic quiescent environment,and composed of black carbonaceous or siliceous shales. In the shales,the content of the calcareous or siliceous brittle minerals is about 65% ～ 93% ,the content of clay minerals is about 5% ～ 30% ,and the TOC content is about 2. 05% ～ 13. 9% . The maturity of organic matter is about 1. 45% ～ 2% ,reaching maturation to post maturation stage. The shale porosity of Dalong Formation is 0. 476md,and the permeability is 0. 001×10-3μm2 . In addition,four kinds of micro-pore were identified： residual original pore,secondary dissolution pore,secondary intercrystalline pore and microfissure. With the feature of＂high siliceous content,high bittleness,high TOC content and porous＂,the black shales of Dalong Formation possess the characteristic of high quality source rocks and the good prospect of exploration and development.

关 键 词：上二叠统 大隆组 页岩气 储层特征 下扬子巢湖-泾县地区 

分 类 号：P588.22[天文地球—岩石学]