摘要
为实现煤层气规模开发,利用井间干扰扩大降压面积,增加解吸体积,有助于提高煤层气产量。以韩城HJ1井组为研究区,采用数值模拟方法模拟研究了规模开发条件下不同时期的压力传播特征,并结合研究区煤层气井生产资料,对相应阶段的煤层气井产能特征进行了分析。结果表明:研究区规模生产条件下,形成了压力传播出现3种阶段特征。排采1年后,井间干扰未形成,压力独立传播特征;排采2年后,部分井形成井间干扰,同时由于储层压力非均衡性增强,也形成了压力"孤岛"现象特征;排采6年后,最终形成井组整体井间干扰特征。
To achieve large-scale exploit multi-well exploitation can improve coalbed methane production by enlarging the pressure drop area through inter-well interference and increasing desorption volume. Taking Hancheng Block as the experimentation area, numerical simulation was used to study the pressure propagation character under the condition of multi-well exploitation at different stages. And combined with the production data of the experimentation area, the paper analyzed the production characteristics of coalbed methane wells for the corresponding stages .The results showed that the pressure transmission has three stages. After production one year, pressure transmits independently since the inter-well interference doesn＇t form. After production two years, some wells will form inter-well interference with water drainage and gas production, and at the same time, pressure ＂island＂ phenomenon characteristic could appear because of the enhancement of reservoir pressure unbalance. After production six years, well group could form a whole inter-well interference.
作者
杜彩霞
张遂安
刘程
许永洲
郭文朋
石悦
Du Caixia Zhang Suian Liu Cheng Xu Yongzhou Guo Wenpeng Shi Yue(Shanxi Natural Gas Limited Company, Taiyuan 030032,China School of Petroleum Engineering,China University ofPetroleum（Beijing） , Beijing 102249,China Coalbed Methane Research Centre,China University of Petroleum （ Beijing） ,Beijing 102249,China Anton Oilfield Services （Group） Ltd. ,Beifing 100102,China Dagang Oilfield Company,China National Petroleum Corporation,Tianjin 300280,China Shanxi High Carbon Energy Low Carbon Utilization Research and Design institute Co. ,Ltd., Taiyuan 030032, China)
出处
《煤炭科学技术》
CAS
北大核心
2016年第12期179-183,共5页
Coal Science and Technology
基金
国家科技重大专项基金资助项目(2011ZX05034-003
2011ZX05062)
关键词
煤层气
规模开发
压力传播
井间干扰
韩城区块
coalbed methane （CBM）
multi-well exploitation
pressure transmission
inter-well interference
Hancheng Block
