煤层气参数井小井眼钻井技术

Slim Hole Drilling Technology for Parameter Well of Coalbed Methane

为了降低煤层气钻井成本,中联煤层气有限责任公司试用了小井眼钻井技术钻参数井。本文介绍此技术的关键组成部分,其中包括:钻井地面设备的配置,各开钻具组合的构成,钻进参数的选择,钻井液体系的选择,钻井液体系的性能维护,钻井液固相控制的措施,防斜、取芯和测井的技术。此技术在贵州保田青山项目6口井的施工中得到成功的应用,其所需费用不及常规油气钻井技术的一半。综上所诉,煤层气井小井眼钻井技术是切实可行。

In order to reduce the cost in drilling, China United Coalbed Methane Corporation adopts slim hole drilling technology to drill parameter wells. In this paper, key parts of this technology are introduced, which includes selections of surface equipment, drill string, drilling parameter and drilling fluid, maintenance of drilling fluid, control measures of solid content, deviation prevention, coring technology, and logging technology. These techniques are successfully applied in the Qingshan project in Baotian, Guizhuo Province, which only cost less than half of what may cost in conventional oil and gas well drilling. According to the above discussion, a conclusion can be reached that slim hole drilling is feasible for the drilling of parameter well.