摘要
鄂西渝东地区位于川东高陡滑脱褶皱带和湘鄂西断块—基底断褶带的中间构造过渡带,变形程度相对较弱,油气保存条件相对较好。基于钻井、地表露头资料,应用薄片观察、扫描电镜、有机地球化学分析方法,对志留系宏观和微观储层特征进行详细地分析,并对鄂西渝东地区非常规气藏油气勘探前景进行探讨。结果表明,龙马溪组主要包括黑色碳质笔石页岩相、深灰色(灰色)泥岩相和含粉砂泥岩相,发育粘土矿物粒间溶孔、长石粒内溶孔、石英粒内溶孔和微裂缝等微储集空间。建深1井和石柱冷水溪一带以东地区,志留系烃源岩品质高、生烃潜力大,并发育斜坡扇砂岩和潮坪相粉砂岩,砂泥(页)岩储层微孔隙微裂缝发育。建深1井为致密砂岩气藏,从该气藏特征和现有钻井显示资料分析,石柱复向斜、利川复向斜和花果坪复向斜完全具备发育致密砂岩气藏和页岩气的巨大潜力。
The study area（western Hubei—eastern Chongqing）was a transitional zone between steep detachment fold belt in eastern Sichuan and block-basement fault-fold belt in western Hunan—Hubei.There the deformation is relatively weak, and oil gas geological preservation condition was better than surrounding areas.Based on the well drilling and field data, employing the petrology,thin section,SEM and organic geochemical analysis,we studied the characteristics of the macro and micro Silurian reservoir rocks and their oil gas prospection.The results show that：the main lithology of Longmaxi Formation was black carboniferous shale,deep gray（gray）shale and silty mudstone.The micro-reservoir spaces were highly developed including intergranular dissolution pores of clay minerals,dissolution pores in feldspar and quartz,microfratures and so on. Source rocks with high quality were developed east to the belt of Well Jianshen 1 and Lengshuixi.And the microporosity and microfractures were very rich in Silurian.The Silurian Hanjiadian Formation gas reservoir belonged to tight gas.Based on the Well Jianshen 1 gas reservoir characteristics and the existing drilling analysis data,we conclude that Shizhu composite anticline,Lichuan and Huaguoping composite syncline are fully equipped with tight gas and shale gas exploration potential.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第6期27-37,共11页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家重点基础研究发展计划"973"项目(2012CB214805)
中国石化海相前瞻性项目(PH08001)
关键词
志留系
储层特征
非常规气藏
鄂西渝东
Silurian
characteristics of reservoir rocks
unconventional gas reservoir
western Hubei—eastern Chongqing
作者简介
马文辛，1982年生，女，汉族，四川南充人，博士研究生，主要从事石油地质学与储层地质学方面的研究工作。E-mail：mwx_89528858@163.com
