沁水盆地樊庄区块煤层气开发生产规律分析  

Analysis on development and production law of CBM in Fanzhuang Block of Qinshui Basin

作　　者：周叡 鲁秀芹 张俊杰[1,2] 左银卿 刘华[1,2] 邹学学 苗耀[1,2] ZHOU Rui;LU Xiuqin;ZHANG Junjie;ZUO Yinqing;LIU Hua;ZOU Xuexue;MIAO Yao(Exploration and Development Research Institute of Huabei Oilfield Company,Renqiu 062550,China;Pilot Test Base for Coalbed Methane Production,China National Petroleum Ltd.,Corporation,Renqiu 062552,China)

机构地区：[1]华北油田公司勘探开发研究院,河北任丘062550 [2]中国石油天然气集团有限公司煤层气开采先导试验基地,河北任丘062552

出　　处：《煤炭科学技术》2018年第6期69-73,148,共6页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2017ZX05064)

摘　　要：为科学判断高阶煤煤层气田开发趋势,合理预测煤层气产量,以高阶煤煤层气区块中开发时间较长,具有较强代表性的樊庄区块为主要研究对象,基于"三要素"认识划分开发单元,提出有效动用储量的概念,综合应用生产数据统计与数值模拟技术进行生产规律研究,研究结果表明樊庄区块煤层气开发呈现3点规律:不同开发单元,采气速度越快,稳产期越短,初期递减率越大;樊庄区块采出程度20%左右产量进入递减期,递减出现时采出程度与井网井距密切相关;煤层气井产量递减初期递减速度相对较快,呈指数递减,后期递减速度减缓,表现双曲递减特征。In order to estimate scientifically the development trend and predict reasonably the production of high-rank coalbed methane（ CBM） fields,the Fanzhuang block of southern Qinshui basin is chosen as the major objective of study which has been developed for a long time and thus is typical in high rank CBM fields. Based on the theory of ＂ three elements＂,development units are divided reasonably,and the concept of effective producing reserves is put forward. Using the statistical analysis of thee production data and the numerical simulation technique,we investigated the production law. The results show that the development of Fanzhuang Block has three features. Firstly,for various development units,higher the gas production rate is,shorter the stable production period is and higher the initial decline rate is. Secondly,when the recovery percent reaches about 20% in Fanzhuang Block,the output enters the declining stage while the reserve recovery percent is closely related to the well pattern and spacing. Thirdly,the decline rate of CBM wells which coincides with exponential form is relatively fast in the initial stage,but it that is in accordance with hyperbolic function becomes slow in the later stage.

关 键 词：煤层气 高阶煤 樊庄区块 

分 类 号：TD712[矿业工程—矿井通风与安全] P618[天文地球—矿床学]