有效应力作用下岩石渗透性和电性响应特征

doi:10.11885/j.issn.1674-5086.2016.05.26.03

西南石油大学学报(自然科学版) ›› 2017, Vol. 39 ›› Issue (3): 85-96.DOI: 10.11885/j.issn.1674-5086.2016.05.26.03

有效应力作用下岩石渗透性和电性响应特征

王明培¹, 陈猛², 李闽², 唐雁冰², 李林芳²

1. 中国石化华北分公司勘探开发研究院, 河南郑州 450000;
2. "油气藏地质及开发工程"国家重点实验室·西南石油大学, 四川成都 610500

收稿日期:2016-05-26 出版日期:2017-06-01 发布日期:2017-06-01
通讯作者: 王明培,E-mail:wangmingpei1970@163.com
作者简介:王明培,1969年生,男,汉族,湖南沅江人,高级工程师,硕士,主要从事油气藏地质方面的研究工作。E-mail:wangmingpei1970@163.com;陈猛,1986年生,男,汉族,湖北随州人,博士研究生,主要从事非常规储层岩石物理和微观渗流方面的研究工作。E-mail:chenmengyzu@163.com;李闽,1962年生,男,汉族,四川射洪人,教授,博士生导师,博士,主要从事非常规致密油气渗流机理与开发等方面的研究工作。E-mail:hytlxf@126.com;唐雁冰,1986年生,男,汉族,四川广元人,博士研究生,主要从事油气藏描述和开发地质方面的研究工作。E-mail:306205295@qq.com;李林芳,1991年生,女,汉族,四川广元人,硕士研究生,主要从事岩石物理方面的研究工作。E-mail:568070858@qq.com
基金资助:
国家自然科学基金联合基金项目（U1562217）；国家自然科学基金（51274169）；国家科技重大专项（2016ZX05048-002-03-LH1）

Permeability and Electrical Response Characteristics of Rocks Under Effective Stress

WANG Minpei¹, CHEN Meng², LI Min², TANG Yanbing², LI Linfang²

1. Research Institute of Petroleum Exploration and Development, North China E & P Company, SINOPEC, Zhengzhou, Henan 457001, China;
2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2016-05-26 Online:2017-06-01 Published:2017-06-01

摘要/Abstract

摘要： 针对砂岩储层有效应力变化对渗透率和地层因素的影响，通过分析不同形状孔喉在有效应力作用下的形变规律，推导出有效应力变化对配位数z、孔喉分布变异系数V_r、水力半径r_H、孔喉长度l和孔喉截面纵横比ε等5个结构参数的影响；结合BLM模型分析，推导出地层因素、渗透率与有效应力间存在乘幂、线性和对数线性等3种响应关系。选取不同地区、不同物性砂岩的地层因素和渗透率的有效应力响应实验数据进行了验证。结果表明，对于高孔高渗砂岩，有效应力作用下地层因素和渗透率变化主要是由于水力半径r_H变化引起的，表现为有效应力作用下的孔喉形变；对于低孔低渗砂岩样品，有效应力作用下地层因素和渗透率发生变化主要是由于配位数z和水力半径rH变化所导致，即孔喉形状和连通性均发生变化。

关键词: 有效应力, BLM模型, 渗透率, 地层因素, 孔喉结构

Abstract: This study focused on the influence of the effective stress change on the permeability and the formation factor of sandstone reservoirs. By analyzing the deformation rules of differently shaped pore throats under effective stress, we inferred the influence of the change in effective stress on five structural parameters:coordination number (z), pore throat distribution variation coefficient (V_r), hydraulic radius (r_H), pore throat length (l), and pore throat cross-section aspect ratio (ε). In combination with BLM model analysis, we inferred that three types of corresponding relationships exist between the formation factor, permeability, and effective stress:exponential, linear, and log-linear. Moreover, we selected experimental data on the effective stress response of sandstone from different areas, which were verified using different physical properties and varying formation factors and permeability. The results show that the change in the formation factors and permeability of highly porous and highly permeable sandstone under effective stress is mostly caused by changes in the hydraulic radius (r_H) and is manifested through pore throat deformation. The change in the formation factor and permeability of low-porosity low-permeability sandstone samples under effective stress is mostly caused by the coordination number (z) and hydraulic radius (r_H) and is manifested through changes in both pore throat shape and connectivity.

Key words: effective stress, BLM model, permeability, formation factor, pore throat structure

中图分类号:

TE122
P313.1

王明培, 陈猛, 李闽, 唐雁冰, 李林芳. 有效应力作用下岩石渗透性和电性响应特征[J]. 西南石油大学学报(自然科学版), 2017, 39(3): 85-96.

WANG Minpei, CHEN Meng, LI Min, TANG Yanbing, LI Linfang. Permeability and Electrical Response Characteristics of Rocks Under Effective Stress[J]. 西南石油大学学报(自然科学版), 2017, 39(3): 85-96.

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有效应力作用下岩石渗透性和电性响应特征

Permeability and Electrical Response Characteristics of Rocks Under Effective Stress

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