Title: Effects of temperature and stress on porosity and permeability of low permeability reservoir
Abstract: Effects and mechanisms of temperature and stress on permeability and porosity of low permeability reservoir were studied by large-scale high-temperature high-pressure permeability instrument,nuclear magnetic resonance testing,rate-controlled mercury penetration technique and relative permeability testing.The results show that when temperature is constant,the permeability of sandstone decreases with the increase of stress while,when stress is constant,the permeability of sandstone decreases with the increase of temperature.The results of nuclear magnetic resonance testing and rate-controlled mercury penetration experiments show that when stress increases,framework grains arranged more densely,and the average radius of pore throat and main pore throat decreases,resulting in worse connectivity,fewer accessible pores and an increase in bound water saturation.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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