四川盆地J区块五峰组页岩储层及吸附气特征研究  

Research on Shale Reservoir and Absorbed Gas Characteristics of Wufeng Formation in J Block of Sichuan Basin

作　　者：乔诚[1] 石文睿[2] 袁少阳 李昂[1] 芦晓伟 石元会[4] 

机构地区：[1]长江大学地球科学学院,武汉430100 [2]长江大学地球物理与石油资源学院,武汉430100 [3]中国石油大学地球科学学院,北京102200 [4]中石化江汉石油工程有限公司测录井公司,潜江433123

出　　处：《科学技术与工程》2015年第18期151-158,共8页Science Technology and Engineering

基　　金：中石化石油工程技术服务有限公司科技攻关项目(SG1305);中国石化集团公司工程先导项目(SG12068)资助

摘　　要：中国页岩气资源丰富,借助美国页岩气勘探开发经验,中石油、中石化两大石油巨头在四川盆地率先取得突破,中石化在J区块已建成10×10^8m^3/年页岩气产能.为深化认识J区块五峰组页岩储层特征与吸附气特征,通过岩心显微图像、CT扫描和3D FIB图像观察、矿物成分分析、压汞测试、解吸气和吸附气量测量实验及测录井资料进行分析研究.结果表明,页岩代表岩性为灰黑色富含有机质硅质炭质页岩,黏土矿物以伊蒙混层（I/S）为主,脆性矿物以石英、长石为主,含量介于67.5％-85.0％;孔隙度分布在2.0％ -7.1％之间,水平渗透率介于0.005-0.545 mD,孔喉半径主要集中分布于4-16 nm;TOC介于1.3％ -5.9％,Ro介于2.2％-2.8％;页岩解析气量不低于3.0 m^3/t,甲烷饱和吸附体积为2.77 m^3/t,总解析气以吸附为主,散失气校正量偏小.研究结果为今后在四川盆地及中上扬子地区寻找页岩气勘探有利区块提供了借鉴.The shale gas resource is rich in China. Taking example by the exploration and development experience of shale gas in American, the two oil giantscompanies Petrochina and Sinopec both made a breakthrough in Sichuan Basin, and Sinopec has gotten 10×10^8m^3/a of shale gas capacity. For deepening the understanding of shale reservoir and absorbed gas characteristics of Wufeng Formation in J Block, we use core microscopic image, CT scanning, 3D FIB image observation, mineral composition analysis, mercury intrusion porosimetry, desorbed gas and absorbed gas content measurement experiment and logging data to analyse and research. It turns out that the main shale is gray black siliceous carbonaceous shale with rich organic matter, the primary clay mineral is illite（I/S）, the main brittle mineral are quartz and feldspar, the content is between 67.5%-85.0%, the porosity is distributed between 2.0%-7.1%, and the horizontal permeability is among 0.005mD-0.545mD, the pore throat radius is mainly distributed in 4nm-16nm, TOC is between 1.3%-5.9%, Ro is between 2.2%-2.8%, and the shale desorbed gas content is less than 3.0m^3/t, the methane saturation adsorption volume is 2.77m^3/t, the total desorbed gas is main absorption, and correcting value of free gas is small. The research result provides a reference for looking for favorable block of shale gas in Sichuan Basin or Upper and middle Yangtze region.

关 键 词：四川盆地 五峰组页岩 矿物成分 孔隙TOC 含气量 Ro 

分 类 号：TE122.113[石油与天然气工程—油气勘探]