摘要
为了简单、快速且准确有效地预测页岩气单井产气量及估算最终储量(EUR),详细分析了目前最常用的2种适用于页岩气藏单井产量及EUR预测经验方法的优缺点,以此为基础,提出了一种基于裂缝流主导的产量递减预测新方法,并结合四川盆地一口页岩气井详细地给出了该方法的应用步骤。实例应用表明,与YM-SEPD法和Duong法的预测结果相比,新方法预测的未来日产气量和EUR最为准确,预测EUR相对误差仅为3. 98%。该方法为准确、快速预测页岩气单井的未来日产气量及EUR提供了借鉴,对裂缝线性流主导的致密气井产能预测具有一定指导意义。
In order to efficiently and accurately forecast the individual well gas production and EUR in shale gas reservoir, the advantages and disadvantages of the most commonly-used empirical methods were analyzed for indi vidual well production and EUR forecast. According to the analysis, a new production decline forecast method based on fracture-dominated flow was proposed and the corresponding technical workflow was given by combining with a shale gas well in Sichuan Basin. Field application indicates that comparing with the forecast with YM-SEPD and Duong methods, this proposed method can accurately forecast the future production rate and EUR with a relative er ror of 3.98%. This method could provide certain reference for the rapid and accurate forecast of future shale gas pro duction and EUR and also could provide certain guidance for the production forecast in tight gas well within fracture -dominated flow regime.
作者
李海涛
王科
补成中
张庆
张砚
Li Haitao;Wang Ke;Bu Chengzhong;Zhang Qing;Zhang Yan(Southwest Petroleum. University, Chengdu, Sichuan 610500, China;CNPC Chuarufing Drilling Engineering Company Limited, Chengdu, Sichuan 610051 China;PetroChina Southwest Oil & Gas field Company, Jiangyou, Sichuan 621700, China)
出处
《特种油气藏》
CAS
CSCD
北大核心
2019年第3期74-78,共5页
Special Oil & Gas Reservoirs
基金
“十三五”国家科技重大专项“深层复杂气藏气井完井优化研究”(2016ZX05052003)、“水平井产气剖面评价”(2016ZX05017005)
关键词
页岩气
经验方法
产量预测
EUR
四川盆地
shale gas
empirical method
production forecast
EUR
Sichuan Basin
