高校地质学报2017，Vol.23Issue(1)：148-156,9.DOI:10.16108/j.issn1006-7493.2016156
地应力类型垂向转换及其对煤储层渗透率控制作用
Vertical Transformation of In-situ Stress Types and Its Control on Coalbed Reservoir Permeability
摘要
Abstract
This paper focuses on Shouyang and Shizhuang coal bed methane (CBM) areas in Qinshui Basin,and aims to investigate the vertical transformation mechanism of the in-situ stress types under different tectonic stress intensities and the controlling effect on the permeability of the coal reservoir.The results show that tectonic stress intensity controls the vertical transformation of the in-situ stress types,but the single or diverse of in-situ stress type is the decisive factor of the relatively high and low permeability of coal reservoir.In the Shouyang CBM area where the tectonic stress is relatively inactive,there is a single type of in-situ stress,and the permeability of coal reservoir is high and decreases exponentially with the increase in buried depth and in-situ stress.In the Shizhuang CBM area,three types of in-situ stress coexist,the permeability of coal reservoir is low and shows zonal exponential decreases with increasing burial depth.Due to the influence of plate tectonics,the CBM basins in China bear strong tectonic stress,but there are differences in tectonic stress intensity in different basins and in different parts of the same basin,leading to different types of in-situ stress and variable permeability at different buried depths.Therefore,it is important to distinguish the in-situ stress types at different depths in order tounderstand the variations of permeability in coal reservoirs.关键词
煤层气/渗透率/地应力类型/垂向转换/指数递减/分带性Key words
coalbed methane/permeability/in-situ stress type/vertical transformation/exponential decline/zonation分类
天文与地球科学引用本文复制引用
孙良忠,康永尚,王金,姜杉钰,张兵,顾娇杨,叶建平,张守仁..地应力类型垂向转换及其对煤储层渗透率控制作用[J].高校地质学报,2017,23(1):148-156,9.基金项目
国家科技重大专项(2016ZX05044)资助 （2016ZX05044）
