煤层气井排采阶段定量化划分研究  

The Research of Quantification Division of CBM Drainage Production

作　　者：王丹 余莉珠 张海峰 康远波 潘林华[1] 

机构地区：[1]国土资源部页岩气资源勘查重点实验室(重庆地质矿产研究院),重庆市页岩气资源与勘查工程技术研究中心(重庆地质矿产研究院),重庆400042 [2]中石油煤层气有限责任公司临汾分公司,山西太原041000

出　　处：《长江大学学报（自然科学版）》2018年第11期52-55,共4页Journal of Yangtze University(Natural Science Edition)

基　　金：重庆市基础科学与前沿技术研究(重点)项目(cstc2017jcyjBX007)

摘　　要：研究区位于鄂尔多斯盆地晋西挠褶带南段,是目前煤层气开发的主战场之一。以该区中高煤阶煤层气为该次研究对象,根据单井的排采情况,运用归纳统计的方法,先将区块内煤层气井按排采特征进行阶段划分和描述,再利用无量纲法进行定量划分,达到定量化划分排采阶段的目的。研究认为,该区煤层气井按排采特征可将其划分为排水降压阶段、不稳定产气阶段、稳定产气阶段和产气递减阶段等4个阶段,对应无量纲产气率分别为0、0.05~0.35、0.35~0.70、0.70~1.0,据此对排采阶段进行定量化划分,从定量角度优化煤层气的排采制度,对本区块煤层气井的排采管理具有重要的指导意义。The studied area was located in the south of folded zone of Southern Shanxi in Ordos Basin,it was one of the major locations of CBM development at present.By taking the mid-high rank of CBM as the object of study,and based on the drainage-production of single well,the method of inductive and statistics was used for the phase division and description of CBM well drainage in the block and a dimensionless method was used for quantitative division of drainage phases.Study indicates that the drainage production of the CBM well can be divided into drainage and depressurization period,unstable gas production period,stable gas production period and gas production decline period.The corresponding dimensionless gas production rate is 0,0～0.35,0.35～0.7 and 0.7～1.0,based on the study,the quantitative division is carried out for the gas drainage for the optimization of CBM drainage system,it provides guidance for drainage management of CBM wells in the block.

关 键 词：煤层气开采 排采阶段 定量化划分 无量纲法 鄂尔多斯盆地 

分 类 号：TE375[石油与天然气工程—油气田开发工程]