确定页岩气储层含气饱和度的岩性密度测井方法  

Lithologic Density Logging Method for Determining Gas Saturation in Shale Gas Reservoir

作　　者：张新华 石文睿 冯爱国 赵红燕 石元会 焦恩翠 ZHANG Xinhua;SHI Wenrui;FENG Aiguo;ZHAO Hongyan;SHI Yuanhui;JIAO Encui(Engineering Technology Department of Sinopec Petroleum Engineering Technology Service Co. LTD, Beijing, 100020, China;State Key Laboratory of Reservoir Geology and Development Engineering of Southwest Petroleum University, Chengdu, Sichuan, 610500, China;Logging Company, Sinopec Oilfield Service Jianghan Corporation,Qianjiang, Hubei, 433123, China)

机构地区：[1]中石化石油工程技术服务有限公司工程技术部,北京100020 [2]油气藏地质及开发工程国家重点实验室·西南石油大学,四川成都610500 [3]中石化江汉石油工程有限公司测录井公司,湖北潜江433123

出　　处：《江汉石油职工大学学报》2020年第2期17-19,共3页Journal of Jianghan Petroleum University of Staff and Workers

基　　金：国家科技重大专项大型油气田及煤层气开发(2016ZX05038-006)。

摘　　要：为了解决页岩气储层含气饱和度确定方法这项“卡脖子”技术,通过页岩气储层岩心数据洞察发现:页岩气储层岩心体积密度(岩性密度)与其含气饱和度存在明显定量关系:这种关系表现为含气饱和度与岩心体积密度(岩性密度)的倒数成正相关关系,并且与对应的测井自然伽马成线性关系。基于此,建立了以岩性密度测井信息为核心的页岩气储层含气饱和度确定方法、相关理论。方法验证实例、现场应用显示效果良好,平均相对误差小于10.0%,不受储层电阻率异常影响,具有较好的应用前景。In order to solve the shale gas reservoir gas saturation determination method which is a difficult technology,this paper studies shale gas reservoir core data and discovers that There is an obvious quantitative relationship between the core volume density(lithologic density)and its gas saturation,that is,the inverse of gas saturation and core volume density(lithologic density)is positive correlation,and the correlation is linear with the corresponding log natural gamma.Based on this,a method and corresponding theory for determining the gas saturation of shale gas reservoir based on lithologic density logging information is established.The method is verified by an example and field application,and the results show that the average relative error is less than 10.0%,which is not affected by abnormal reservoir resistivity and has a good application prospect.

关 键 词：页岩气 含气饱和度 测井 岩性密度 方法 

分 类 号：P618.13[天文地球—矿床学] P631.81[天文地球—地质学]