摘要
针对我国煤层气多分支水平井和竖直压裂井的生产特点,从垂直压裂井与多分支水平井的钻完井方式、增产措施、增产原理等方面阐述了两种煤层气井产气机理的异同;根据地下水流动特点及各自钻完井方式,结合达西定律得出两种煤层气井排采过程中压力动态变化模型;根据地层供液能力及各排采阶段主要任务,把煤层气井饱和水阶段的工作制度划分为排采调整和稳定降液两个过程;把气水两相流阶段的工作制度划分为排采制度适应过程、井底压力稳定下降过程、控压稳产过程及配产生产过程共4个过程。提出了钻完井及生产排采过程中关键阶段应注意的事项,为煤层气的开采提供了依据。
In order to clearly understand the characteristics of the vertical fracturing wells and multiple laterals horizontal wells in coal bed methane production,based on well drilling and completion,the measures and principles increasing production,in this paper,the production mechanism of two kinds of coal bed methane wells is stated.Based on the flowing characteristic of groundwater and well drilling and completion,combined with Darcy's laws,the changing pressure models of two kinds of wells are gained.According to the supplying ability and primary task in every drainage stage,the working system in saturated water is divided into adjust process and steady falling liquid depth process,the working system in two-phases stream stage is divided into four processes,i.e.,adapt process of working system,steady falling pressure at the bottom of the well,steady production process and controlling pressure at the bottom of the well and production process.Finally,it is pointed out that attendant proceedings in the process of the well drilling and completion and production,these acquaintanceship is of guidance to the production of coal bed methane wells.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期48-52,共5页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
河南省生物遗迹与成矿过程重点实验室开放基金项目(otmp0804)
关键词
竖直压裂井
多分支水平井
煤层气
排采制度
压力传递
the vertical fracturing well
multiple lateral horizontal well
coal bed methane
drainage system
pressure transmission
