深层致密气藏扩展指数递减模型及其在新场须五气藏的应用  

Application of stretched exponential production decline model to the Xu-5 deep tight gas reservoir of Xinchang,Sichuan,China

作　　者：詹泽东[1,2,3] 郭科[2] 段永明[3] 邓伟飞[3] 郑家友 

机构地区：[1]成都理工大学地球物理学院,成都610059 [2]成都理工大学四川省数学地质重点实验室,成都610059 [3]中国石油化工股份有限公司西南油气分公司,成都610041

出　　处：《成都理工大学学报（自然科学版）》2017年第4期489-493,共5页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国石化西南油气田科研项目(14KF-28);中国石化西南油气田生产项目(GJ-332-1426)

摘　　要：研究扩展指数(SEPD)递减模型的性质与参数求取方法,探索深层致密气藏的递减分析方法。通过理论推导与新场须五气藏开发实践的综合分析,结果表明SEPD递减模型具有"双三一相关"以及"有界性"特征,并针对新场须五气藏提出了"多点采样梯度下降法"求取模型参数的方法。实践表明,新场须五深层致密气藏递减特征与SEPD递减模型的递减特征一致,采用"多点采样梯度下降法"可有效地求取模型参数,进而为开展深层致密气藏产量预测与储量评价提供保障。The property of stretched exponential production decline model（SEPD）is studied and the way of seeking the parameter for SEPD is exercised in order to explore production decline analysis for deep tight gas reservoir.Theoretical derivation and comprehensive analysis for the Xu-5reservoir reveal that the SEPD is characterized by ＂three parameters＂,＂one correlation＂and ＂boundedness＂,and accordingly,a method of multiple position sampling and gradient descent is proposed to obtain parameters for the model.The application of SEPD to the Xu-5（Member 5of Upper Triassic Xujiahe Formation）gas reservoir in Xinchang area indicates that production decline characteristics of Xu-5are in accordance with SEPD,and the multiple position sampling and gradient descent method can effectively obtain the model parameters.Therefore,this method is important in the prediction and evaluation of production of gas field.

关 键 词：SEPD 递减分析 有界性 梯度下降法 预测 评价 

分 类 号：P588.22[天文地球—岩石学] TE132.2[天文地球—地质学]