摘要
基于沁水盆地南部樊庄区块煤层气井地质与排采资料,探讨煤体结构差异对煤层气井产能的影响。煤的孔裂隙系统、力学性质的差异对煤层气井开发的各环节有重大影响,这导致相应煤层气井的产能有较大差异。随煤体破坏程度的增加,井径扩径现象凸现,这增加了后期一系列工艺的难度。以原生结构煤和碎裂结构煤为主的煤储层,复合改造和多尺度支撑剂的应用可提升煤储层长期导流能力;以碎裂-糜棱结构煤为主的煤储层,其开发的核心是对煤储层进行卸压改造和保护层开采,以改善煤储层的导流能力。
Based on CBM wells＇ geological and drainage data of Fanzhuang Block in Southern Qinshui Basin, effect of different coal structures on CBM wells＇ productivity is discussed. The differences of pore system, fissure systems, and mechanics properties of coal have great effect on the whole development process of CBM wells, which results in great differences in production of corresponding CBM wells. The more damage of coal-body is, the larger the diameter of wells becomes, which will cause greater difficul- ties of a series of technologies in later stage. The application of compound modifications and multi-scale propping agents can improve the long-term flow conductivity in coal reservoirs dominated by primary and cataclastic structure coal. For the coal reservoirs dominated by fragme key point of development is to adopt pressure relief or protective layer conductivity. nted-mylonitic structure coal, the mining, so as to improve its flow
出处
《中国煤层气》
2017年第2期9-12,共4页
China Coalbed Methane
关键词
煤体结构
煤层气井产能
导流能力
Coal structure
productivity of CBM well
flow conductivity
