【作者】 文卓； 康永尚； 邓泽； 李贵中； 王红岩； 曹明亮； 康刘旭；

【Author】 Wen Zhuo;Kang Yongshang;Deng Ze;Li Guizhong;Wang Hongyan;Cao Mingliang;Kang Liuxu;College of Geosciences,China University of Petroleum (Beijing);State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum (Beijing);Research Institute of Petroleum Exploration and Development,PetroChina;

【机构】 中国石油大学(北京)地球科学学院； 中国石油大学(北京)油气资源与探测国家重点实验室； 中石油勘探开发研究院；

【摘要】 渗透率在煤矿开采及煤层气开发中起到了十分重要的作用。为了了解中国煤储层渗透率分布规律,为煤层气勘探开发提供理论指导,本文对中国主要含煤地区的1300m以浅部位现今地应力强度进行对比,认为中国含煤盆地地应力强度以大兴安岭-吕梁山-龙门山为界限,以东地区为中高-高应力区,以西地区为低-中应力区。在现今地应力分布规律研究的基础上,对东西两个应力区的煤储层渗透率进行了统计对比,发现分界线以东地区渗透率主要以小于0.1mD为主,分界线以西地区渗透率主要为大于0.1mD为主,即分界线以东地区渗透率明显低于以西地区,进一步证实了地应力强度对煤储层渗透率的主控作用。板块活动是形成中国煤储层和渗透率区域分布规律的主要因素,东部地区直接受到来自菲律宾板块和太平洋板块的俯冲作用,地应力强度比较大;西部地区主要受到来自印度洋板块的碰撞作用,但由于远离力源,地应力强度比较弱。更多还原

【Abstract】 Permeability has played a very important role in coal mining and coalbed methane development.In order to understand the distribution law of coal reservoir permeability in China and provide theoretical guidance for coalbed methane exploration and development,this paper compares the present in-situ stress intensity of above 1300 m in China’s main coal-bearing areas,and considers that Daxing’anling-L(u|")liang Mountain-Longmen Mountain is the boundary of in-situ stress intensity in China’s coal-bearing basins,the east is the middle high-high stress region,and the west is the low-medium stress region.Based on the study of current stress distribution law,the coal reservoir permeability in the east and west stress zones is statistically compared.It is found that the permeability in the east of the boundary line is mainly less than 0.1 mD,and the permeability in the west of the boundary line.It is mainly greater than 0.1 mD,that is,the permeability in the east of the boundary line is significantly lower than that in the west,which further confirms the main control effect of the in-situ stress intensity on the permeability of coal reservoirs.The plate activity is the main factor that forms the distribution law of coal reservoirs and permeability in China.The eastern region is directly subjected to subduction from the Philippine plate and the Pacific plate,and the in-situ stress intensity is relatively large;the western region is mainly affected by the collision from the Indian Ocean plate,but Due to the distance from the source of force,the strength of the ground stress is relatively weak.更多还原