中扬子区上震旦统—志留系页岩气勘探远景  

Exploration Prospects of Shale Gas of Upper Sinian-Silurian in Mid-Yangtze Region

作　　者：李艳霞[1] 李净红[1] 

机构地区：[1]西安石油大学油气资源学院非常规天然气中心,西安710065

出　　处：《新疆石油地质》2010年第6期659-663,共5页Xinjiang Petroleum Geology

基　　金：中国石油大学(北京)油气资源与探测国家重点实验室开放课题(2009002)

摘　　要：利用野外露头、有机地球化学及钻井资料,分析中扬子区寒武—志留系页岩气资源勘探远景。研究表明,中扬子区上震旦统—志留系页岩主要以上震旦统陡山沱组、下寒武统水井沱组(或牛蹄塘组)及志留系为主。上述3套泥质岩及页岩有机质含量丰富、有机质类型好、热演化程度高,多数已达到成熟-过成熟阶段,是有效页岩气气源岩。中扬子区自加里东以来经历多期构造运动,构造隆升和挤压作用改善了页岩储集性能,提高了页岩气聚集量。湘鄂西区上震旦统和下寒武统泥页岩可作为有利页岩气勘探选区,而鄂西渝东区钻井揭示志留系见工业性气流,表明该区志留系页岩气潜力较大。Based on the outcrop,geochemistry and drilling data,this paper analyzes exploration prospects of Cambrian-Silurian shale gas resource in mid-Yangtze region.The analysis indicates that the Cambian-Silurian shale is dominated by Doushantuo formation of Upper Sinian,Shuijingtuo formation or Niutitang formation（Lower Cambrian） and Silurian in this region.These argillaceous rock and shale characterized by rich organic matter content,fine kerogen type and high thermal evolution（mature to overmature） are valid source rocks of the shale gas.The mid-Yangtze region undergoes multistage tectonic movements since Caledonian.The shale reservoir quality is improved by tectonic uplift and compression,increasing the accumulation amount of shale gas.It is concluded that the mudstone-shale of Upper Sinian and Lower Cambrian can be as favorable areas for shale gas exploration in western Hunan and Hubei.And the commercial shale gas flow of Silurian discovered by drilling reveals that this area is rich in shale gas resources of Silurian in western Hubei and eastern Chongqing.

关 键 词：中扬子区 上震旦统 下寒武统 志留系 页岩气 

分 类 号：TE122.2[石油与天然气工程—油气勘探]