鲁西地区石炭-二叠系太原组页岩气潜力  

Shale Gas Resource Potential of Permo-Carboniferous System Taiyuan Formation in West Shandong Province

作　　者：韩作振[1] 李赟[1] 高丽华[1] 秦祯 孟阳[3] 韩梅[1] 刘固耀 彭超[1] 

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]山东鲁北地质工程勘察院,山东德州253015 [3]中国石化胜利油田分公司开发处,山东东营257000

出　　处：《山东科技大学学报（自然科学版）》2015年第2期51-57,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家重点基础研究发展计划("973"计划)项目(2012CB723104);国家自然科学基金项目(41372108;41372134);高等学校博士学科点专项科研基金项目(20133718130001);山东省高校优秀科研创新团队计划项目;山东省科技发展计划项目(2013G0020403);青岛市重点科研项目发展计划(13-4-1-2-gx)

摘　　要：通过野外剖面观测取样、室内薄片鉴定、X射线衍射分析、扫描电镜分析及有机地球化学分析,结合钻井资料,从富有机质页岩的地质背景、有机地球化学指标、储层特征等方面,探讨鲁西石炭-二叠系太原组页岩特征。研究发现,鲁西地区太原组页岩厚度20-140m,平均70m,单层页岩厚度一般5-80m,埋深140-4000m,厚度大,埋深适中。太原组页岩有机碳含量为0.82%-10.1%,平均值达3.59%,有机质含量高,属非常好的烃源岩;干酪根类型为Ⅱ1、Ⅱ2和Ⅲ型,生气及吸附能力强;Ro为1.05%-1.9%,平均值为1.31%,处于高成熟热裂解生气阶段。太原组页岩脆性矿物含量30%-60%,平均值为46.44%,含量高,易于水力压裂人工造缝;页岩孔隙主要为晶间微孔、粒内溶蚀微孔和裂缝。鲁西地区太原组页岩与美国Barnett页岩具有相似性,具有良好的页岩气潜力。Through outcrop investigation and sampling, thin-section observation, X diffraction, scanning electron microscopy, organic geochemistry experiment and drilling data analysis, this paper explored the shale characteristics of Permo-Carboniferous System Taiyuan formation in West Shandong province, from aspects of geological background, organic geochemistry and reservoir conditions of the organic-rich shale. The research shows that with a thickness of 20- 140 m,averaging 70 re,single layer thickness of 5-80 m and burial depth of 140-4000 m,the Taiyuan formation shale in West Shandong province enjoys a great thickness and a moderate burial depth. With the organic carbon content of 0.82 %- 10. 1%, averaging 3.59 %, the Taiyuan formation shale is a superduper hydrocarbon source rock with high organic content. With the kerogen types of II1 ,II2 and III,the shale has strong gas production and adsorption capacity. With R,, of 1.05%-1.9% ,averaging 1.31%,the shale is at high mature thermal cracking gas stage. With a high brittle mineral content of 30% -60% ,averaging 46. 44% ,the Taiyuan formation shale is apt to make artificial cracks with hydraulic fracturing. The shale pores are mainly imergranular micropores, particle micropores and fractures. Similar to Barnett shale in America,Taiyuan formation shale in West Shandong province has great potentiality of shale gas.

关 键 词：页岩气 太原组 海相页岩 鲁西地区 

分 类 号：P618.130.2[天文地球—矿床学]