不同压裂规模对煤层气井产气量影响研究——以韩城矿区某井田为例  

Impact of Fracturing Scales on Gas Production in Coalbed Methane Wells—A Case Study from a Wellfield in Hancheng Mine Area

作　　者：穆瑞东 张莹辉 朱通 吴杨缘 刘毅 MU Ruidong;ZHANG Yinghui;ZHU Tong;WU Yangyuan;LIU Yi(Shaanxi Coalbed Methane Development and Utilization Co.,Ltd.,Shaanxi 710077)

机构地区：[1]陕西省煤层气开发利用有限公司,陕西710077

出　　处：《中国煤层气》2024年第6期8-12,共5页China Coalbed Methane

摘　　要：煤层气储存环境复杂,大多需要通过先钻井后压裂的方式对储层结构进行改造后抽放,目前国内所采用的压裂工艺以水力喷砂射孔压裂为主。文章以韩城矿区某井田为例,使用灰色理论关联分析方法进行各个地质-工程等参数与产量的关联度计算,并对计算结果进行排序,明确影响煤层气井产量的主控因素。对比分析不同压裂规模对煤层气井的造缝能力、裂缝支撑效果及气井产量影响情况。结果表明:贯穿砂岩沟通煤层增采煤层气,必须以井间裂缝沟通、段间裂缝覆盖、层间裂缝贯穿为原则,优化设计液量、加砂强度,从而达到经济合理增采煤层气的目的。The storage environment of coalbed methane is complex,requiring reservoir structure modifi-cation through drilling followed by hydraulic fracturing before gas extraction.The current domestic hy-draulic fracturing technology mainly uses water jet sandblasting fracturing.Taking the example of a well-field in Hancheng Mining Area,this paper employs the grey relational analysis method to calculate the correlation between various geological engineering parameters and gas production.The calculated results are ranked to identify the main controlling factors influencing the production of coalbed methane wells.Furthermore,the paper compares and analyzes the impact of different fracturing scales on fracture genera-tion capacity,fracture support effect,and production of coalbed methane wells.The results show that en-hancing coalbed methane production by connecting sandstone beds with the coal seams should follow prin-ciples of inter-well fracture communication,intra-segment fracture coverage,and inter-layer fracture pen-etration.Optimizing fracturing fluid volume and sand injection intensity can achieve the goal of economi-cally and reasonably improving coalbed methane production.

关 键 词：煤层气 灰色关联 压裂规模 多段控砂压裂 

分 类 号：TD712[矿业工程—矿井通风与安全]