摘要
为确定延川南区块2号煤层含气量主要地质控制因素,利用地质资料和已采煤层实际煤层含气量数据,研究了2号煤层含气量的区域分布特征及规律,分析了煤层厚度、埋深、煤的变质程度、地质构造、水文地质作用等因素对含气量的控制作用。研究结果表明,2号煤层含气量在区域上总体呈南高北低、西高东低分布特征。构造条件和水文地质条件是2号煤层含气量分布的主控因素。区内张性的正断层对煤层气的富集起到了是破坏作用,导致了正断层周围形成了含气量的相对低值区;研究区相对滞留的水动力环境有利于煤层气的保存和富集。
To determine the main geological controlling factors of gas content in No. 2 coal seam of Yan- chuannan block, the geologic data and actual gas emission data integrating with region tectonic evolution characters are used to research the characteristics of gas content in No. 2 Coal Seam, and analyze the control factors of the gas content in terms of seam thickness, burial depth, metamorphic grade, geologic structure and hydrological conditions. The results show that the gas content in No. 2 is higher in the south than the north and higher in the west than the east. The results also prove that the geologic structure and hydrological conditions are considered to the main control action factors to gas content. Tensional normal fault damages the gather of CBM and relative retention hydrodynamic environment conducive to the pres- ervation and enrichment of CBM.
出处
《中国煤层气》
2013年第6期31-33,共3页
China Coalbed Methane
基金
国家科技重大专项项目(2011ZX05034
2011ZX05033)
国家自然科学基金项目(41272178)
江苏省"青蓝工程"和国家级大学生创新训练项目(201210290049)
关键词
延川南
含气量
煤层
控制因素
Yanchuannan
gas content
coalbed methane
controlling factors
