页岩气储层渗透率测井评价方法研究  

Study on well logging evaluation method of gas shale permeability

作　　者：金武军[1,2] 李军[1,2] 武清钊[1,2] 路菁[1,2] 苟其勇[3] 

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石化页岩油气富集机理与有效开发国家重点实验室,北京100083 [3]中国石油长城钻探工程有限公司地质研究院,盘锦124010

出　　处：《地球物理学进展》2017年第1期177-182,共6页Progress in Geophysics

基　　金：国家自然科学基金"页岩气储层孔隙孔径分布表征及渗透率评价方法研究(41604124)";国家重大专项"陆相页岩油甜点地球物理识别与预测方法"(2016ZX05049-002);中石化科技部攻关项目"川东南龙马溪组页岩气储层测井综合评价研究"项目(P15066)联合资助

摘　　要：页岩渗透率与页岩气产能关系密切,是测井储层评价的重要参数之一.页岩储层岩性复杂致密,孔隙组分多样,导致传统渗透率评价方法受到限制.基于页岩渗透率主控因素,从孔隙结构出发,通过液氮吸附-高压压汞资料及核磁共振实验分析数据,提取控制页岩渗透率的孔隙结构参数,建立页岩渗透率评价模型;利用核磁T2谱构建出伪毛管压力曲线,获得二者之间的定量转换关系,并提取孔隙结构参数;最后利用核磁测井刻度常规测井曲线,并结合页岩岩石相分析,实现了页岩渗透率的较高精度评价.研究成果及应用对于国内页岩气产能建设及高效开发具有重要意义.The production of shale gas is closely allied to shale permeability which is one of the most significant parameters in well logging reservoir evaluation. Traditional evaluation methods are circumscribed in shale because of its complex tight lithology and various pore components of shale gas. Permeability evaluation methods are proposed based on both main controlling factors and pore structure in this paper. By means of analyzing liquid nitrogen adsorption-high pressure Hg injection data and nuclear magnetic resonance experimental data, pore structure parameters which dominate shale permeability are acquired to establish permeability evaluation model. Then,virtual capillary pressure curves are built by using NMR spectrum through obtaining the quantitative relationship. Combining with lithofacies analysis,we evaluate shale permeability with high accuracy using conventional well logging data by calibrating well logging curve with NMR log. Research and application results have important meaning for productivity construction and efficient development of shale gas.

关 键 词：页岩气 孔隙结构 渗透率 测井评价 

分 类 号：P618.13[天文地球—矿床学]