晋城地区煤层气井多层合采效果评价  

Evaluation of coalbed methane drainage effect for multi-target seams in Jincheng region

作　　者：杨建超 李贵红 刘钰辉 李国富[2] 王朝帅 孙天宇 YANG Jianchao;LI Guihong;LIU Yuhui;LI Guofu;WANG Chaoshuai;SUN Tianyu(Xi’an Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Xi’an 710077,China;CBM Department of Shanxi Jincheng Anthracite Jinmei Group,Jincheng 048006,China;Shanxi Lanyan Coalbed Methane Company Limited,Jincheng 048204,China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077 [2]山西晋城煤业集团煤层气事业部,山西晋城048006 [3]山西蓝焰煤层气集团有限责任公司,山西晋城048204

出　　处：《煤田地质与勘探》2019年第6期26-31,共6页Coal Geology & Exploration

基　　金：国家科技重大专项课题(2016ZX05067-001);中煤科工集团西安研究院有限公司科技创新基金重点项目(2018XAYZD05);陕西省创新能力支撑计划项目(2018TD-039)~~

摘　　要：煤层气井多煤层合采效果研究为煤炭安全、井下瓦斯治理、确定开发技术指标、单井配产、合理划分开发层系、煤层气高效开发以及制定中长期煤层气开发规划具有很好的参考价值。以晋城成庄矿区为例,将开发中后期排采效果检验井含气量等数据与邻近井原始含气量进行对比,分析3、9和15煤各煤层含气量在合层排采后的变化特征,以评价排采效果;并结合地质资料及现场排采动态进一步分析影响各煤层排采效果的主控因素。综合分析认为,成庄矿区经过多年地面煤层气多层合采,下部15号煤层比上部3号和9号煤层含气量降低更快。分析其原因认为成庄矿区15号煤层含气量降低较快的主要影响因素包括煤层渗透率、供液能力、储层压力及排采制度等。研究结果为剩余储量预测提供可靠的科学依据。The study of the multi-target seams drainage effect on coalbed methane wells has great value, including coal safe mining, underground gas control, determination of development technical indicators, single well production, rational division of development layer, efficient development of coalbed methane, and development of medium and long-term coalbed methane development planning. Taking Chengzhuang mine of Jincheng as an example, the sampling data of the extraction effect in the middle and late stages of development are compared with the original gas content of the adjacent wells to evaluate the extraction effect, and the main control factors affecting the drainage effect are analyzed by combining the geological data and the on-site drainage data. According to the comprehensive analysis, it has been found that the No.15 coal seam has gas content lower than that of the No.3 and No.9 coal seams through surface coalbed methane extraction after several years. The analysis showed that the main influence factors for the rapid reduction of gas content of No.15 coal seam in Chengzhuang mining area include the coal gas content, permeability, liquid supply capacity, reservoir pressure in coal seam and producing measures, which provide a scientific basis for the prediction of remaining reserves.

关 键 词：煤层气 抽采效果 合层排采 煤层气含量 渗透率 成庄矿区 晋城地区 

分 类 号：TD98[矿业工程—选矿]