煤层气排采动态参数及其相互关系  

Dynamic parameters of CBM well drainage and relationship among them

作　　者：杨秀春[1] 李明宅[2] 

机构地区：[1]中国矿业大学,北京100083 [2]中联煤层气有限责任公司,北京100011

出　　处：《煤田地质与勘探》2008年第2期19-23,27,共6页Coal Geology & Exploration

摘　　要：排采制度是保证煤层气井生产排采成功的关键要素。以煤层气开发潘河试验区生产资料为依托,利用统计、对比的方法,对试验区排采过程中的产气量、产水量、套压和动液面等参数进行综合研究。结果表明,区内煤层气排采过程及其动态参数具有明显的阶段性特征;排采过程中,动液面深度和套压为正相关关系,二者可通过相互调整控制井底压力。根据各阶段排采动态参数的特征,提出了与各排采阶段相适应的排采制度。Production system which control the CBM well output fluctuation is a key factor to ensure production successfully. Based on the production data of Panhe CBM development testing area, a comprehensive study in- cluding gas output, water output, casing pressure and dynamic water level was carried out by the method of statistic and antitheses. The result shows that there is an obvious phase characteristics for both CBM production process and dynamic parameters. In the process of CBM drainage the dynamic water level is related to casing pressure. This relationship can be used to control down well pressure. An adaptive production system to different production stages was pointed out, based on characters of dynamic parameters at every stage.

关 键 词：煤层气排采 套压 动液面 井底压力 排采制度 

分 类 号：P618.11[天文地球—矿床学]