贵州织金区块煤层气单井控压产气阶段排采制度研究

Research on Coalbed Methane Single Well Production Systems with Control Pressure in Zhijin Block of Guizhou Province

煤层气单井排采控压产气阶段的关键问题是如何合理制订排采制度。以贵州省织金试验区煤层气开发排采资料为依托,分析了织金煤层气藏特征,探讨了产气量、产水量、套压、液面深、井底流压等排采动态参数间的规律,提出了井底流压稳定值的计算方法,并研究了井底流压的控制,最后给出了适合该区块排采制度的建议。

How to determine the reasonable production systems are the key factors in the production stages of the single coalbed methane well with the control pressure. Based on the production data of the coalbed methane development experimental zone in the Zhijin block of Guizhou Province,the coalbed methane reservoir characteristics were analyzed. The dynamic parameters were discussed during the production,including the gas production rate,water production rate,casing pressure,depth level of the fluid and the bottomhole flowing pressure. A new computing method of stable bottomhole flowing pressure was put forward. According to the control of the flowing pressure,a reasonable production systems was put forward to the block.