西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (6): 27-37.

• 地质勘探 • 上一篇    下一篇

鄂西渝东志留系储层特征及非常规气勘探前景

马文辛1,刘树根1,黄文明2,张长俊2,曾祥亮3   

  1. 1.“油气藏地质及开发工程”国家重点实验室 成都理工大学,四川成都6100592. 中国石油川庆钻探工程有限公司地质勘探开发研究院,四川成都6100513. 重庆地质矿产研究院页岩气所,重庆渝中400042
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-12-01 发布日期:2012-12-01

Reservoir Rocks Characters of Silurian and its Unconventional GasProspection in Western Hubei—Eastern Chongqing

Ma Wenxin1, Liu Shugen1, Huang Wenming2, Zhang Changjun2, Zeng Xiangliang3   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu,Sichuan 610059,China2. Geological Exploration & Development Research Institute,CNPC Chuanqing Drilling Engineering Company Limited,Sichuan 610059,China3. Shale Gas Institute,Chongqing Institute of Geology and Mineral Resources,Yuzhong,Chongqing 400042,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-12-01 Published:2012-12-01

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。

关键词: 志留系, 储层特征, 非常规气藏, 鄂西渝东

Abstract: 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.

Key words: Silurian, characteristics of reservoir rocks, unconventional gas reservoir, western Hubei—eastern Chongqing