福建二叠系中统童子岩组页岩气储层特征  

Characteristics of shale gas in Middle Permian Tongziyan Formation in Fujian Province

作　　者：陈泉霖[1,2] CHEN Quanlin(School of Earth Science,China University of Geosciences,Wuhan 430074,China;Fujian Administration of Coal Geology,Fuzhou 350003,China)

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]福建省煤田地质局,福建福州350005

出　　处：《煤田地质与勘探》2018年第4期79-85,共7页Coal Geology & Exploration

基　　金：福建省公益性基础性地质调查(GY20140301)~~

摘　　要：为了评价福建省二叠系中统童子岩组页岩气资源开发潜力,开展了野外地质调查及现场解吸测试工作,研究了童子岩组页岩气储层特征及其影响因素。结果表明:福建二叠系中统童子岩组泥页岩干酪根为Ⅲ型;有机碳质量分数普遍在2%以下;Rran值介于2.52%~5.80%,泥页岩储层处于过成熟演化阶段;泥页岩储层黏土矿物含量较高,脆性矿物含量不高,不利于页岩储层的压裂改造;泥页岩孔隙度较低,渗透率极低,中孔是童子岩组页岩气储存的主要场所;童子岩组含气量总体较低,主要受后期构造运动和岩浆活动影响所致。分析表明:在受影响相对较小的局部块段——加福向斜和抚市向斜,其向斜底部的童子岩组具有页岩气成藏条件。The work of geology survey and carbon isotopic composition on shale gas has been done to reasonably evaluate the gas resource potential of Middle Permian Tongziyan Formation.The results indicate thatⅢ-type kerogen in the shale predominate and the content of organic carbon in the shale is usually under 2%,with the Rran between 2.52%and 5.80%generally and the organic is in a mature stage of evolution.Shale reservoirs have high content of clay minerals and low content of brittle mineral,which is unfavorable to the fracturing treatment.The shale has low porosity and extremely low permeability,and meso-pores constitute the major space for gas adsorption.Tongziyan Formation gas content is generally low,mainly due to post-tectonic movement and magmatic activity.The analysis showed that the Tongziyan Formation at the bottom of the syncline has reservoir-forming conditions in the relatively less affected local block segment,the Jiafu syncline and the Fushi syncline.

关 键 词：页岩气 童子岩组 储层特征 构造运动 二叠系 福建 

分 类 号：P618[天文地球—矿床学]