煤层气与相邻砂岩气藏合采数值模拟研究  

Numerical simulation of commingling production for coalbed methane and adjoining sandstone gas reservoirs

作　　者：冯其红[1] 张先敏[1] 张纪远[1] 陈东[2] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266580 [2]中联煤层气国家工程研究中心有限责任公司,北京100011

出　　处：《煤炭学报》2014年第A01期169-173,共5页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2009219606);国家油气重大专项资助项目(2011ZX05038-004);中央高校基本科研业务费专项基金资助项目(14CX02046A)

摘　　要：借鉴现有模型,建立了煤层与相邻砂岩储气层合采的三维气-水两相流动数学模型及数值模型,并结合韩城矿区煤储层以及砂岩层的实际地质资料,开展了煤层气与相邻砂岩储气层合采条件以及显著性影响因素的数值模拟分析研究。研究结果表明,砂岩层含水饱和度对煤层气与相邻砂岩气藏合采的影响最为显著,由此确定煤层气与相邻砂岩气藏合采的首要条件为相邻砂岩储气层不含水或微含水,且仅当韩城矿区内与5号煤层相邻的山西组底部砂岩层孔隙度达到5%以上时,才具备与煤层合采的意义,此时相邻砂岩层煤成气可成为煤层气井产能的有利补充。A new three-dimensional two-phase flow model for commingling production of coalbed methane and adjoin- ing sandstone gas reservoirs was established, and relevant numerical simulation analysis of commingling production conditions and significant influence factors were conducted by the geological data of coal seams and sandstone gas res- ervoirs in Hancheng area. The research results show that adjoining sandstone gas reservoirs without water or with mi- cro-water is the principal condition for the commingling production, and that the adjoining sandstone reservoir at the bottom of Shanxi Formation can be perforated and fractured along with the No. 5 coal seam in Hancheng area only when the adjoining sandstone porosity are more than 5%.

关 键 词：煤层气 砂岩 合采 

分 类 号：P618.11[天文地球—矿床学]