基于渗透率和井距的煤层气采收率预测新方法  

A New Method for Predicting Coalbed Methane Recovery Based on Permeability and Well Spacing

作　　者：尹彦君 段宝江 张中尧 蔡振华 冯毅 YIN Yan-jun;DUAN Bao-jiang;ZHANG Zhong-yao;CAI Zhen-hua;FENG Yi(Engineering Technology Branch,CNOOC Energy Technology&Services Limited,Tianjin 300450,China)

机构地区：[1]中海油能源发展股份有限公司工程技术分公司,天津300450

出　　处：《承德石油高等专科学校学报》2024年第6期17-21,共5页Journal of Chengde Petroleum College

摘　　要：煤层气采收率的预测方法主要有:类比法、解吸法、气含量降低估算法、等温吸附曲线法以及气藏数值模拟法等,其中前四种方法考虑的因素较少,可靠性较低,而第五种方法综合考虑了多种因素,预测结果可靠,但过程比较复杂,所需时间较长。图版法以渗透率和井距作为影响煤层气采收率的重点因素,并综合考虑其它因素,应用数值模拟技术建立简化模型,研究渗透率、井距与煤层气采收率的关系并建立了图版,同时应用含气饱和度和等温吸附曲线特征系数对采收率进行校正。该方法可以比较快速地确定煤层气采收率,并在临兴东区块进行了应用,效果较好。The prediction methods of coalbed methane recovery mainly include:the analogy method,the desorption method,the estimation method of gas content reduced,the isothermal adsorption curve method and reservoir numerical simulation method.Among them,the first four methods consider fewer factors with lower reliability,while the fifth method comprehensively considers multiple factors and has reliable prediction results,but its process is complicated and takes a long time.With comprehensive consideration of other factors,the chart method takes permeability and well spacing as the key factors affecting CBM recovery,using numerical simulation technique to establish a simplified model to explore the relationship between permeability,well spacing and coalbed methane recovery and to establish the chart.At the same time,gas saturation and isothermal adsorption curve characteristic coefficients are used to correct the recovery efficiency.This method can quickly determine CBM recovery,and it has been applied in Linxing East Block with good effects.

关 键 词：煤层气 渗透率 井距 采收率 图版 

分 类 号：TE375[石油与天然气工程—油气田开发工程]