页岩气储层的基本特征及其评价  

Basic features and evaluation of shale gas reservoirs

作　　者：蒋裕强[1] 董大忠[2] 漆麟[1] 沈妍斐[1] 蒋婵[1] 何溥为 

机构地区：[1]西南石油大学资源与环境学院 [2]中国石油勘探开发研究院 [3]延长油田股份有限公司子长采油厂

出　　处：《天然气工业》2010年第10期7-12,共6页Natural Gas Industry

基　　金：国土资源部全国油气资源战略选区调查与评价专项课题(编号:XQ-2009-14);国家科技重大专项(编号:2008ZX05001-001)

摘　　要：页岩气独特的赋存状态,"连续成藏"的聚集模式,区别于常规天然气储层的特征以及评价内容等决定了页岩气储层研究的特殊性。目前,国内针对页岩气储层特征及评价的工作开展得相对较少,需要建立相应的评价标准。在大量调研国外文献的基础上,综合利用四川盆地最新的浅井钻探和野外露头取样资料,从常规储层研究思路入手,详细分析了页岩气储层的基本特征(有机质特征、矿物组成、物性特征、储渗空间特征),进而总结了页岩气储层评价的主要内容;同时,借鉴美国页岩气勘探成功经验,从实际资料出发,筛选出有机质丰度、热成熟度、含气性等8大关键地质因素,进而提出了一套较为适用的储层评价标准。据该标准评价后认为,四川盆地下古生界筇竹寺组和龙马溪组2套海相黑色页岩具有良好的勘探开发前景。Shale gas reservoirs are featured by unique gas occurrence and continuous gas accumulation,and their characteristics and evaluation criteria are different from those of conventional gas reservoirs.Just due to the said peculiarities,related studies on shale gas reservoir features and evaluation are relatively poor at present in China,so it is essential to establish corresponding evaluation criteria.Based on an investigation into a number of literatures at home and abroad,in combination with the latest shallow exploratory drilling data and outcrop data in the Sichuan Basin,we performed an in-depth analysis of the basic features of shale gas reservoirs,including organic matter,mineral composition,physical properties,and poroperm characteristics,and presented the main contents of shale gas reservoir evaluation.In addition,eight key geologic factors such as organic abundance,thermal maturity,and gas content,etc.are selected and corresponding evaluation criteria are established.According to these criteria,the Lower Palaeozoic Qiongzhusi and Longmaxi formations in the Sichuan Basin are favorable targets for marine black shale gas exploration.

关 键 词：页岩气 储集层 溶蚀孔隙 有机孔隙 裂缝 评价内容 评价标准 关键地质因素 

分 类 号：P618.13[天文地球—矿床学]