四川盆地江东地区龙马溪组一段上部页岩储层含气性评价  

Shale Gas Reservoir and Gas-Bearing Properties of Upper Gas Reservoir of the First Member of Longmaxi Formation in Jiangdong

作　　者：蔡进[1] 刘莉[1] 刘超[1] 舒志恒[1] 邓佳琪 CAI Jin;LIU Li;LIU Chao;SHU Zhi-heng;DENG Jia-qi(SINOPEC Jianghan Oilfield Company,Wuhan 430223,China)

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北武汉430223

出　　处：《河北地质大学学报》2021年第2期58-62,共5页Journal of Hebei Geo University

基　　金：国家科技重大专项“涪陵页岩气开发示范工程”(2016ZX05060)。

摘　　要：论文根据区块内评价井焦页X-3井分析化验资料,从地层沉积、地化特征、储层物性、含气性等方面对本区块上部气层进行储层及含气性综合分析,优选有利层系。焦页X-3井上部气层50块样品岩心分析结果表明:评价井上部气层埋深3559.5~3610.6 m,厚度51.1 m,全区整体厚度为40~70 m,岩性主要发育硅质粉砂质泥页岩,有机碳含量0.54%~2.37%,平均为1.48%,有机质类型为II1和II2型,镜质体反射率2.69%~4.38%;孔隙度1.5%~6.6%,平均为3.70%;上部气层岩矿组分来看,石英含量平均为34.85%,碳酸盐含量平均为12.24%,脆性矿物含量较高,粘土矿物以伊利石和伊蒙混层为主,未见高岭石。现场实测总含气量1.45~2.74 m^(3)/t,平均为2.25 m^(3)/t。研究认为江东区块上部气层具备较好的页岩储层条件,含气性较好,其中上部气层的⑦、⑧小层是最优的开发层段。Based on the analysis and test data of Jiaoye X-3 well,an evaluation well in the block,this paper makes a comprehensive analysis of the reservoir and gas bearing property of the upper gas reservoir in this block is carried out in the aspects of property and gas bearing property.The core analysis results of 50 samples in the upper gas layer of JiaoyeX-3 well show that the buried depth of the upper gas layer of the evaluation well is 3559.5~3610.6 m,the thickness is 51.1 m,the thickness of the whole area is 40~70 m,and the siliceous silty shale is mainly developed,TOC content is 0.54%~2.37%,with an average of 1.48%;organic matter types are II1 and II2,vitrinite reflectance is 2.69%~4.38%;porosity is 1.5%~6.6%,with an average of 3.70%;the average quartz content of upper gas layer is 34.85%,carbonate content is 12.24%,brittle ore content is high,clay minerals are mainly illite and illite mixed layer,without kaolinite.The total air content measured on site is 1.45~2.74 m^(3)/t,with an average of 2.25 m^(3)/t.The research shows that the upper gas reservoir of Jiangdong block has good shale reservoir conditions and gas bearing property,and the middle part of the upper gas reservoir(⑦and⑧)is the optimal development interval.

关 键 词：页岩气 储层特征 含气性 五峰组 龙马溪组 

分 类 号：TE122.2[石油与天然气工程—油气勘探]