煤层气开发过程中的煤储层伤害机理综述

Study on Coal Reservoir Damage Mechanism During Coalbed Methane Development

煤层气地面开发过程主要包括煤层气井的钻井、固井、测井、储层改造、排采设备安装、排采等一系列工程。而在煤层气开发过程中,应尽量避免煤储层伤害,否则将导致煤层气井产量下降,甚至不产气。本文从现场实际出发并结合其他地区煤层气开发经验,总结了开发过程中,导致储层伤害的钻井、固井、储层改造、排采四个方面的伤害机理。

The ground development of coalbed methane mainly includes drilling,cementing,logging,reservoir reconstruction,equipment installation and drainage of coalbed methane well.In the process of CBM development,coal reservoir damage should be avoided as much as possible,otherwise the production of CBM well will be reduced,or even no gas production will be generated.From the actual situation and combining with other regions' experience in coalbed methane development,this paper are summarized four aspects of damage mechanismin in the course of development,such as drilling,cementing,reservoir modification and drainage of CBM.