沁水盆地和顺区块15号煤储层特征及试采效果分析

摘要

Based on the pore, fissure and absorption characteristics, gas-bearing property, coal mass structure and reservoir pressure in the Taiyuan Formation No. 15 coal seam in the Heshun block, combined with later stage production testing results have considered that the fundamental factors to bring on low yield of CBM wells have low methane content, low desorption pressure and low reservoir pressure of No.15 coal reservoir above 1000m buried depth. While below the depth 1000m, No.15 coal reservoir has favorable conditions of higher methane content, desorption pressure and reservoir pressure, to carry out appropriate fracturing and drainage engineering processes can realize single well high and stable yields.%在分析和顺区块太原组15号煤层的孔隙裂隙特征、吸附特性、含气性、煤体结构和储层压力的基础上,结合后期试采效果,认为在埋深1 000m以浅15号煤储层的低含气量、低解吸压力和低储层压力是制约煤层气井低产的根本因素;在1 000m以深,15号煤储层在含气量高、解吸压力和储层压力高的有利储层条件下,实施合适的压裂和排采工程工艺,单井产气量可实现高产稳产.