织金区块煤层气井产气量影响因素分析  

Influence factor analysis for coalbed methane production in Zhijin Block

作　　者：孟美辰 王运海[2] 袁航[3] 王伟[1] 张艇 MENG Meichen;WANG Yunhai;YUAN Hang;WANG Wei;ZHANG Ting(Exploration and Development Research Institute,SINOPEC East China Company,Nanjing 210011,China;SINOPEC East China Company,Nanjing 210011,China;Nanchuan Coalbed Methane Institute,SINOPEC East China Company,Chongqing 408400,China;Daqing Drilling and Exploration Engineering Corporation No.1 Geo-Logging Company,Daqing 163712, China)

机构地区：[1]中国石化华东油气分公司勘探开发研究院,江苏南京210011 [2]中国石化华东油气分公司,江苏南京210011 [3]中国石化华东油气分公司南川页岩气项目部,重庆408400 [4]大庆钻探工程公司地质录井一公司,黑龙江大庆163712

出　　处：《煤炭科学技术》2019年第4期187-192,共6页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2016ZX05042);中国石化先导资助项目(YTBXD-02-09-2018)

摘　　要：为了提高织金区块多薄煤层气井产气量,通过对区块地质条件、储层压裂改造、配套工艺和排采制度4个方面的对比分析,总结出织金区块煤层气井产气量的主要影响因素。研究表明:织金区块高产井目的层埋深主要集中在500～700 m,采用4段逐层压裂且施工加砂强度在10～15 m^3/m、加液强度大于150 m^3/m时产气量可达1 000 m^3以上;最终总结出适合织金区块的"五段三压"、"避峰求面"、"面积降压"的"阶段降压"的排采模式,提高了经济效益,为该区块后续大规模开发及类似煤层气田的勘探开发、排采制度的制定提供了借鉴。Analysis of geological condition, reservoir fracture treatment, matching technology, and drainage system were performed to improve the coalbed methane production in Zhijin Block. The influence factor analysis was also conducted. The results show that the depth of the most productive gas well in Zhijin Block is between 500 and 700 m. The gas production could reach 1 000 m^ 3 when the following criteria are satisfied-using four-stage fracturing,intensity of gravel input between 10 and 15 m ^3/m, and intensity of liquid input higher than 150 m^ 3/m. A drainage system that is suitable for Jinzhi Block is proposed, which includes four drainage technologies, namely five-segment compression, peak avoidance, area decompression, and regional decompression. This paper provides reference for future coalbed methane exploration in Zhijin Block and in other similar coalbed methane fields as well.

关 键 词：织金区块 煤层气 排采 产气量 

分 类 号：TE122[石油与天然气工程—油气勘探]