Experimental evaluation of the salt dissolution in inter-salt shale oil reservoirs

作     者：YANG Zhengming LI Ruishan LI Haibo LUO Yutian CHEN Ting GAO Tiening ZHANG Yapu YANG Zhengming;LI Ruishan;LI Haibo;LUO Yutian;CHEN Ting;GAO Tiening;ZHANG Yapu

作者机构：Institute of Porous Flow&Fluid MechanicsPetroChina Research Institute of Petroleum Exploration&DevelopmentBeijing 100083China University of Chinese Academy of SciencesBeijing 100493China Research Institute of Exploration and DevelopmentJianghan Oilfield CompanyWuhan 430223China 

出 版 物：《Petroleum Exploration and Development》 (石油勘探与开发（英文版）)

年 卷 期：2020年第47卷第4期

页      面：803-809页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 082002[工学-油气田开发工程] 

基　　金：Supported by the Major National Oil and Gas Special Projects(2017ZX05013-001,2017ZX05049-005) Key Basic Science and Technology Research Project of CNPC(2018B-4907) 

主　　题：shale oil salt dissolution imbibition physical simulation nuclear magnetic resonance 

摘      要：By using salt dissolution experiment,imbibition experiment and high temperature and high pressure nuclear magnetic resonance(NMR)on-line test,the evaluation methods for salt dissolution of inter salt shale oil-bearing cores were established,and the effects of salt dissolution on spontaneous imbibition and permeability were *** intensity of salt dissolution is quantitatively evaluated by comparing the signal quantity and distribution characteristics of T2 spectrum(transverse relaxation time)measured at different *** salt dissolution experiment,salt in the core is gradually dissolved as the injected water is continuously immersed in the *** spontaneous imbibition experiment of inter-salt shale oil-bearing core can be divided into three stages:strong imbibition and weak salt dissolution,strong salt dissolution promoting imbibition,and weak salt dissolution and weak *** salt dissolution in spontaneous imbibition is very obvious,and the salt dissolution contributes more than 60%of *** micro-pore structure in different cross sections or different parts of inter-salt shale oil-bearing core isn’t uniform,and the pore volume,porosity and permeability increase after salt dissolution.