摘要
为了确定煤层气储层渗透率的变化规律,从岩石力学性质分析入手,以山西沁水盆地上古生界煤层气储层的实际地质情况为例,探讨了构造应力场、地温场、压力场对煤储层渗透率分布的控制机理。研究表明,构造应力场的应力-应变控制着储层裂隙的发育规律,地温场通过控制煤岩的力学性质而改变应力场的作用效果,而随着压力场作用增强,渗透率降低。
In order to determine the change law of permeability of coalbed-gas-bearing seam, the paper discusses the control mechanism of tectonic stress field, geo-temperature field, and pressure field on permeability distribution of coalbed-gas-bearing seam starting from the analysis of rock mechanics and taking the actual geological condition of coalbed-gas-bearing seams in Upper Palaeozo Erathem of Qinshui Basin as a sample. The research shows that the stress-strain field controls the fracture development of coal seams while geo-temperature field changes the action effect of stress-strain field by dominating the mechanical properties of coals and rocks. The permeability decreases as increase of pressure field action.
出处
《山东科技大学学报（自然科学版）》
CAS
2007年第3期12-14,31,共4页
Journal of Shandong University of Science and Technology(Natural Science)
基金
973国家重点基础研究发展规划项目(2002CBll700)
关键词
应力场
地温场
压力场
煤储层
渗透率
stress field
geo-temperature field
pressure field
coalbed-gas-bearing seam
permeability
