阜新盆地刘家区煤层气储层特征及产出特点

Research on the features of the storage layer of coal gas seam and yielding

在阜新盆地刘家区构造演化及构造特征、煤层发育特征、煤的化学成分及排采试验资料的分析基础上,对研究区煤层气含量、煤的吸附性、煤层渗透率、煤储层压力、临界解吸压力、煤体结构、煤层气产出特点进行了综合研究。认为研究区煤层分布广、厚度大、丰度高,煤的吸附能力强;埋深与辉绿岩侵入体是控制煤层气含量的主要因素,成煤后期构造运动是影响储层渗透率的关键因素。煤层气开发有利区应在向斜翼部和岩墙、岩床附近变质程度高的煤区。

This article analyzes the air content in the coal seam,the absorption,permeation、pressure、preserves,critical desorption pressure,structure of coal mines,the features of the coal gas' yielding on the basis of analyzing geographic structure development and characteristics, the chemical ingredients of the coal and the experiment materials of drainage and excavation in Liujia in Fuxin Basin. It's believed that in this area,there is a large distribution of coal,with its particular thickness,richness and its strong desorption;Burial depth and magmatic rock intrusive mass are the main factors to determine coal gas contents. The later structure movement of the coal formulation is the key factor to influence the permeation of the coal preserves. The exploiting area should be in the synclinal profile,dike and bed rock with the high level of the coal metamorphism.