致密油储层渗透率界定指标探讨

doi:10.3969/j.issn.1672-7703.2018.05.007

摘要/Abstract

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1mD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。

关键词: 致密油, 储层, 渗透率, 渗流速率, 孔喉半径

Abstract: 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 1mD 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.

Key words: tight oil, reservoir, permeability, seepage rate, pore throat radius

中图分类号:

毕海滨, 段晓文, 杨兆林, 李淑珣, 姚爱华, 祁越, 郑婧, 高日丽, 梁坤, 周明庆, 孟昊. 致密油储层渗透率界定指标探讨[J]. 中国石油勘探, 2018, 23(5): 57-64.

Bi Haibin, Duan Xiaowen, Yang Zhaolin, Li Shuxun, Yao Aihua, Qi Yue, Zheng Jing, Gao Rili, Liang Kun, Zhou Mingqing, Meng Hao. Discussion on defining standards of permeability of tight oil reservoirs[J]. China Petroleum Exploration, 2018, 23(5): 57-64.

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