测井技术2018，Vol.42Issue(2)：200-204,5.DOI:10.16489/j.issn.1004-1338.2018.02.013
基于流管模型的裂缝性低渗透油藏井间示踪剂解释模型
Interpretation Model for Inter-well Tracer Tests in Fractured Low-permeability Reservoirs Based on Stream-tube Model
摘要
Abstract
Due to the strong heterogeneity,the tracer production curve of fractured reservoirs low-permeability has multiple peaks,which is different from that of conventional reservoir.So,it cannot accurately describe the information of fractures.Therefore,it is urgently to establish a tracer interpretation model for fractured reservoirs.In this paper,the fracture system of reservoir is considered to be composed of many fracture belts,and the fracture belt is equivalent to the stream tube.Based on above assumptions,the physical model of inter-well tracer flow is established.Moreover,a mathematical model of the tracer concentration distribution along the stream tube is built according to the one-dimensional convection-diffusion equation.After the concentration of each fracture belt is superimposed in the production layer, the tracer concentration production expression is obtained.Sensitivity analysis show s that as the number of equivalent stream tubes increases, the peak value of the concentration production curve decreases;as the length of flow tubes increases,the tracer breakthrough time increases,and the peak concentration decreases;as the permeability and pressure difference between injection and production well increase,the breakthrough time decreases,and the bandwidth of concentration production curve increases.T he field application show s that the results of this model are close to the numerical simulation interpretation result,which validates the rationality of the model.关键词
井间示踪测试/裂缝性低渗透油藏/流管模型/裂缝条带/参数解释模型Key words
inter-well tracer test/fractured low-permeability reservoir/stream-tube model/frac-ture belt/interpretation model分类
天文与地球科学引用本文复制引用
陈冠中,林春阳,姜瑞忠,张伟,李强,李广..基于流管模型的裂缝性低渗透油藏井间示踪剂解释模型[J].测井技术,2018,42(2):200-204,5.基金项目
中海石油(中国)有限公司科技项目分级组合区块深部调剖技术扩大试验研究(YXKY-2016-ZY-02) （中国）
