石油学报 ›› 2011, Vol. 32 ›› Issue (6): 959-967.DOI: 10.7623/syxb201106005

• 地质勘探 • 上一篇    下一篇

四川盆地及其周缘下寒武统页岩气聚集条件

聂海宽 1  张金川 2  李玉喜 3   

  1. 1  中国石化石油勘探开发研究院  北京  100083; 2  中国地质大学能源学院  北京  100083; 3  国土资源部油气资源战略研究中心  北京  100034
  • 收稿日期:2011-05-27 修回日期:2011-08-16 出版日期:2011-11-25 发布日期:2012-01-17
  • 通讯作者: 聂海宽
  • 作者简介:聂海宽,男,1982年4月生, 2010年获中国地质大学(北京)博士学位,现为中国石化石油勘探开发研究院在站博士后,主要从事油气成藏机理和非常规天然气地质的研究工作。
  • 基金资助:

    国家油气专项(2009GYXQ-15)和中国博士后科学基金(20110490541)联合资助。

Accumulation conditions of the Lower Cambrian shale gas in  the Sichuan Basin and its periphery

NIE Haikuan 1  ZHANG Jinchuan 2  LI Yuxi 3   

  • Received:2011-05-27 Revised:2011-08-16 Online:2011-11-25 Published:2012-01-17

摘要:

在对重庆市秀山县溶溪和四川省南江县小两等15处下寒武统黑色页岩的露头观察和取样分析基础上,研究了四川盆地及其周缘下寒武统黑色页岩的沉积相、分布、有机质类型及含量、成熟度、孔隙度和含气量等页岩气聚集条件。与美国主要产气页岩相比,这些页岩具有厚度大、有机碳含量高、成熟度高和含气量高等特点,具备页岩气藏发育的良好地质条件。四川盆地及其周缘下寒武统页岩气藏最有利发育区位于川南—黔北—黔中、鄂西—渝东和川东北地区,并分析了各有利区的泥岩、页岩具体指标。根据实测含气量,采用体积法计算研究区下寒武统页岩气资源量为(3.3~11.4)×1012 m3,中值为7.4×1012 m3

关键词: 四川盆地及其周缘, 下寒武统, 页岩气, 聚集条件, 资源潜力, 有利区

Abstract:

Through observations, sampling and laboratory analyses of 15 black shale outcrops in the Sichuan Basin and its periphery, we studied shale-gas accumulation conditions of the Lower Cambrian black shale, such as depositional facies, types and contents of organic matter and its maturity, distribution, porosity and gas contents of the black shale etc.. Compared with major U.S. gas-producing shales, the Lower Cambrian shale in the Sichuan Basin and its periphery was characterized by great thickness, abundance of organic carbon, high maturity and elevated gas content, being capable of good geological conditions for shale-gas reservoir development. Some applied indices, such as thickness of the shale, content of organic matter, maturity and gas content, with a superimposition method of integrated information indicated that the most favorable areas for shale-gas accumulations in the Lower Cambrian shale are the southern Sichuan-northern Guizhou-central Guizhou, western Hubei-eastern Chongqing and northeast Sichuan. Based on the measured gas content, the amount of shale-gas resources in the Lower Cambrian was calculated with the volumetric method to be 3.3×1012 m3~11.4×1012 m3, with a median value of 7.4×1012 m3.

Key words: Sichuan Basin and its periphery, Lower Cambrian, shale gas, accumulation condition, resource potential, favorable area of shale gas