煤层气井水力压裂效果评价与消突时间预测研究  

Study on hydraulic fracturing effect evaluation and outburst elimination time prediction in coalbed methane wells

作　　者：刘高峰[1,2] 翁红波[1,3] 宋志敏[3,4] 吕闰生[1] 任建刚[1,2,4] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]河南省生物遗迹与成矿过程重点实验室,河南焦作454000 [3]河南工程学院资源环境学院,河南郑州451191 [4]河南省高校煤矿环境地质灾害防治工程技术研究中心,河南郑州451191

出　　处：《河南理工大学学报（自然科学版）》2015年第6期753-758,783,共7页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41302126);河南省科技计划项目(132102310027;142102310030);河南省生物遗迹与成矿过程重点实验室开放基金资助项目(OTMP1406);河南工程学院博士基金资助项目(D2013018)

摘　　要：为了评价和预测高瓦斯矿区煤层气预抽工程水力压裂致裂与消突效果,以屯留井田煤层气井为例,采用微地震监测技术与基于滤失效应下的水力压裂预测模型,对煤层气井水力压裂产生的裂缝形态和几何尺寸进行了预测评价。结果显示:研究区水力压裂产生的裂缝形态以KGD型垂直缝为主,主裂缝沿着裂隙主发育方向进行扩展;水力压裂控制范围近似椭圆形,基本符合设计要求;消突预抽时间与日均抽采量之间呈指数负增长关系,据此,建立了单井压裂区消突时间预测模型,为企业合理安排预抽计划以及煤矿安全高效生产提供了保障。In order to evaluate and forecast hydraulically created fracture and outburst elimination effect for coalbed methane pre-drainage project in high gas mining area,the methods of microseismic monitor technology and hydraulic fracturing prediction model based on filtration effect were applied to study the fracture morphology and geometry size under hydraulic fracturing in coalbed methane wells of Tunliu minefield. The results show that fracture morphology of the study area is dominated by vertical seam of KGD,and the main fracture extends along the direction where the main crack develops; the control range of hydraulic fracturing is approximately oval,which basically meets the design request. The pre-drainage time of outburst elimination and daily average gas extraction present an exponential relationship of negative growth,accordingly,a prediction model of outburst elimination time in single well fracturing zone is established to provide a guarantee for coal mine to arrange the gas pre-drainage plan reasonably and produce safely and effectively.

关 键 词：煤层气 水力压裂 消突 高瓦斯 微震监测 

分 类 号：P618.11[天文地球—矿床学]