沁水盆地南部某煤层气区块储层开发方式的研究与应用  

Research and Application of Reservoir Development in Coalbed Methane Block in Southern Qinshui Basin

作　　者：常风琛 CHANG Fengchen(Production Support Center,China United Coalbed Methane Co.Ltd.,Shanxi 030000)

机构地区：[1]中联煤层气有限责任公司生产支持中心,山西030000

出　　处：《中国煤层气》2023年第3期6-8,共3页China Coalbed Methane

摘　　要：我国中浅煤层气资源量丰富。以往运用直井、定向井的开发方式开采煤层气,效果并不显著,高产比例低,达产后,稳产时间短,产量递减较快,通过对典型井压裂模拟以及生产数据历史拟合结果显示,直井、定向井压裂缝长短,泄压半径小,现有的直井、定向井煤储层压裂改造工艺技术改造范围有限,是导致直井、定向井低产低效、稳产时间短的主要原因。水平井分段压裂开发与直井、定向井相比优势在于直井、定向井压裂形成单一主缝且缝长较短,水平井分段压裂可分段形成多条主缝且易形成水平段高渗流通道,有效提高气井产能释放。The shallow coalbed methane resources in China are rich.In the past,vertical wells and directional wells were used to develop coalbed methane,but the effect was not significant,the high yield ratio was low,the stable production time was short and the production decline was fast after reaching the plateau.Through the fracturing simulation of typical wells and the historical fitting results of production data,it is shown that the length of the fractures in vertical wells and directional wells is short,with a small pressure relief radius.The limited range of the existing coal reservoir fracturing reconstruction technology of vertical wells and directional wells is the main reason for the low and inefficient production and short stable production time.Compared with vertical wells and directional wells,staged fracturing of horizontal wells has the advantage that a single main fracture is formed in vertical wells and directional wells with shorter fracture length,while staged fracturing of horizontal wells can form multiple main fractures and easily form high seepage channel in horizontal section,effectively improving the productivity release of coalbed methane wells.

关 键 词：中浅煤层 水平井 开发方式 

分 类 号：TE37[石油与天然气工程—油气田开发工程]