Huabei Oilfield Company, PetroChina School of Energy, China University of Geosciences (Beijing)

为探究水平井开发动态及生产特征,对樊庄区块56口煤层气水平井的实际生产资料进行了跟踪研究,确定了4种产能模式(低产气井、中产气井、中高产气井和高产气井),共计8个亚类。分析了不同产能模式气井的生产特征及影响其开发效果的部分因素,并提出了相应的水平井开发建议,结果表明:制约水平井开发效果的主要因素为地质因素、工程因素和管理因素,其中又以煤储层富集高产认识、断层识别及工程上的井眼稳定性问题尤为突出;根据地质条件合理部署井位,尽量避开断层,同时综合考虑煤层产状、煤体结构、顶底板稳定性及高煤阶煤储层固有力学性质对钻井的影响,排采过程中保证排采连续性,才能实现煤层气水平井的高效、绿色开发。

In order to explore the development dynamic and production features of the horizontal well, a tracing study was conducted on the actual production infor mation of 56 coalbed methane wells in Fanzhuang Block, four production modes (including the low production gas well, medium production gas well, medium and high p roduction gas well and high production gas well) were determined and there were totally 8 sub-types.The paper had an analysis on the production features of different p roduction mode gas well and the partial factors affected to the development effect and provided the development proposals of the relevant horizontal wells.The results s howed that the major factors to restrict the development effect of the horizontal wells would be geological factor, engineering factor and management factor.Among the m, the understanding of the coal reservoir enrichment and high production, fault identification and well stability problems were foregrounding.According to the geologica | condition, the well location should be rationally arranged and the fault should be avoided possibly.Meanwhile, the comprehensive considerations were conducted on th e seam occurrence, roof and floor stability and the insitu mechanics property affected to the well drilling.During the gas drainage process, the drainage continuity ensur ed could realize the high efficient and green development of the coalbed methane horizontal well.

国家科技重大专项资助项目(2011ZX05061)；