煤层气藏中一种模拟压裂直井的等效方法  

An equivalent method for simulating vertical well fracturing in coal gas reservoirs

作　　者：窦莲[1] 彭小龙[1] 冉艳[1] 王可可[1] 

机构地区：[1]油气田地质及开发工程国家重点实验室西南石油大学,四川成都610500

出　　处：《特种油气藏》2012年第4期96-99,155-156,共4页Special Oil & Gas Reservoirs

基　　金：国家重大科技专项"山西沁水盆地南部煤层气直井开发示范工程"(2009ZX05060-05)

摘　　要：直井压裂是1种开发煤层气的重要方式,如何准确模拟直井压裂后的排采规律是数值模拟研究的难点。根据压裂直井和两分支水平井流线的相似性,提出了1种等效模拟方法,推导出了直井压裂缝传导系数和虚拟多分支水平井传导率之间的数量关系,根据该关系式等效模拟直井压裂后的排采规律。以沁水盆地南部一口压裂气井FZ-005井为例,进行实验结果对比,证明该等效方法符合实际应用需要。Vertical well fracturing is an important method in coalbed methane development,and how to simulate the trend of water discharge and gas production after vertical well fracturing has been a big issue in numerical simulation research. An equivalent simulation method has been proposed based on the similarity of stream lines of fractured vertical well and dual lateral horizontal well. The quantitative relationship between the conductivity coefficients of vertical well fractures and virtual multi-lateral horizontal well has been derived,on which basis the water discharge and gas production pattern of fractured vertical wells has been simulated. Fractured gas well FZ-005 in southern Qinshui Basin was taken as an example and has verified that the equivalent method is feasible.

关 键 词：煤层气 压裂直井 PEBI网格 等效多分支水平井 导流系数 FZ-005井 沁水盆地南部 

分 类 号：TE319[石油与天然气工程—油气田开发工程]