致密油储层渗透率界定指标探讨  

Discussion on defining standards of permeability of tight oil reservoirs

作　　者：毕海滨[1] 段晓文 杨兆林[3] 李淑珣[1] 姚爱华[1] 祁越[3] 郑婧 高日丽[1] 梁坤[1] 周明庆 孟昊 Bi Haibin;Duan Xiaowen;Yang Zhaolin;Li Shuxun;Yao Aihua;Qi Yue;Zheng Jing;Gao Rili;Liang Kun;Zhou Mingqing;Meng HaoI(PetroChina Research Institute of Petroleum Exploration ＆ Development;PetroChina Exploration ＆ Production Company;Research Institute of Petroleum Exploration and Development,PetroChina Changqing Oilfield Company)

机构地区：[1]中国石油勘探开发研究院 [2]中国石油勘探与生产分公司 [3]中国石油长庆油田公司勘探开发研究院

出　　处：《中国石油勘探》2018年第5期57-64,共8页China Petroleum Exploration

基　　金：中国石油勘探与生产分公司前期项目"致密油储量评价技术及应用"(101002kt0b30090021001)

摘　　要：近年来,由于美国致密油产量快速增长,引起了全球范围内的广泛关注,但是对于致密油的渗透率评价指标国内外尚不统一。基于油藏产能评价、实验室岩心相对渗透率、岩心排驱压力以及岩心孔隙度—渗透率关系等多个方面分析,结合现行标准及覆压渗透率—地面渗透率关系,提出了主要以地面渗透率1m D作为致密油储层与常规储层的分界点;并分析了致密油储层与常规特低渗透储层3个方面的差异,包括孔隙空间构成、孔隙度—渗透率关系以及束缚水饱和度等;最后提出了致密油储层两种辅助表征方法即渗流速率法和孔喉半径法等供参考使用。In recent years, the rapid growth of tight oil production in the United States has attracted extensive attention all over the world, but the evaluation standard of the permeability of tight oil hasn＇t been unified at home and abroad. Based on the analysis of reservoir productivity, relative core permeability, core displacement pressure and the relationship between core porosity and permeability, and considering applicable standard and the relationship between overburden permeability and ground permeability, it is suggested that 1 m D ground permeability can be the critical value to distinguish tight oil reservoir from conventional reservoir, differences between tight oil reservoir and conventional ultralow-permeability reservoir are analyzed in pore space, porosity-permeability relationship and irreducible water saturation, and finally two auxiliary characterization methods for tight oil reservoirs are proposed： one is seepage rate and the other is pore throat radius.

关 键 词：致密油 储层 渗透率 渗流速率 孔喉半径 

分 类 号：TE112.23[石油与天然气工程—油气勘探]