基于核磁共振流体分布孔隙精细划分的致密油藏流体可动性特征研究  

Research on the characteristics of fluid mobility of the tight reservoir with the NMR fluid distribution pore classification method

作　　者：刘鹏 彭斌 于瑞江 李婷 高辉[2,3,4] 李腾 LIU Peng;PENG Bin;YU RuiJiang;LI Ting;GAO Hui;LI Teng(Insititute of Oil Production Technology,PetroChina Yumen Oilfield Company,Jiuquan 735019,China;College of Petroleum Engineering,Xi'an Shiyou University,Xi'an 710065,China;Engineering Research Center of Development and Management for Low to Ultra-Low Permeability Oil and Gas Reservoirs in West China of Ministry of Education,Xi'an Shiyou University,Xi'an 710065,China;Xi'an Key Laboratory of Tight Oil(Shale Oil)Development,Xi'an 710065,China)

机构地区：[1]中国石油股份有限公司玉门油田分公司采油工艺研究院,酒泉735019 [2]西安石油大学石油工程学院,西安710065 [3]西安石油大学西部低渗-特低渗油藏开发与治理教育部工程研究中心,西安710065 [4]西安市致密油(页岩油)开发重点实验室,西安710065

出　　处：《地球物理学进展》2025年第1期294-303,共10页Progress in Geophysics

基　　金：陕西省科技厅自然科学基金面上项目(2024JC-YBMS-256)资助.

摘　　要：以长8致密油藏为研究对象,结合基于核磁共振分形理论的流体分布孔隙精细划分方法,开展了三种不同类型岩心流体可动性核磁共振测试,对不同类型岩心流体可动性进行了定量表征.实验结果表明:不同类型岩心流体可动性是物性、岩石学特征以及微观孔隙非均质性耦合作用的结果,岩心中较大尺寸孔隙流体可动性显著影响了岩心的流体可动性;不同类型岩心中可动流体主要发生在P1-2和P1-3类孔隙之中,这两类孔隙的数量及其可动流体数量决定了岩心流体可动性;孔隙结构系数和流体可动性系数在定量表征流体可动性方面具有一定的优势,P1-2和P1-3类孔隙的孔隙结构复杂程度以及其流体可动性最终决定了岩心的流体可动性.The Chang 8 tight sandstone reservoir is taken as the research object,and combining with the refined classification method of fluid distribution pore based on NMR fractal theory,the fluid motility of three different types of tight sandstone core samples were carried out to quantitatively characterize the fluid motility with the NMR tests.The experimental results show that the fluid motility of different types of cores is the result of the coupling of physical properties,lithological characteristics and microscopic pore inhomogeneity,and the fluid motility of larger pore sizes in cores significantly affects the fluid motility of cores;the fluid motility of different types of cores mainly occurs in P1-2 and P1-3 pores,and the amounts of these two types of pores and the amounts of their movable fluids determine the fluid motility of cores The pore structure coefficient and fluid motility coefficient have certain advantages in quantitative characterization of fluid motility,and the complexity of pore structure and fluid motility of P1-2 and P1-3 pores ultimately determine the fluid motility of cores.

关 键 词：致密油藏 流体可动性 孔隙结构系数 流体可动性系数 

分 类 号：P631[天文地球—地质矿产勘探]