岩土力学2017，Vol.38Issue(1)：272-276,5.DOI:10.16285/j.rsm.2017.01.034
基于原位渗透率试验反演岩石孔隙度的新方法
A new method for rock porosity inversion based on in-situ permeability test
摘要
Abstract
To obtain the in-situ porosity of rock,a transient gas seepage model with main parameters of porosity and permeability is developed from an in-situ steady-state permeability test.A porosity inversion model is constructed based on genetic algorithm.Rock permeability and transient pressure decline data obtained from in-situ permeability tests are adopted as known variable and observational data respectively.Then a new method is formed to determine rock porosity inversion.The effect of porosity results from a typical site on the pressure decline curve and the feasibility of porosity inversion is analyzed.A parallel porosity inversion program is conducted,and then the porosities of rock at two holes are inversely calculated using the mainframe computer.Finally,the correctness of inversion results is verified by numerical simulation and laboratory measurement.As the in-situ test method has small damage to rock and its pore structure,the results of porosity by inversion method has better area representation than those by laboratory measurement,so that the inversion result can be applied to numerical simulation of gas leakage in rocks.关键词
原位试验/渗透率/孔隙度/反演Key words
in-situ test/permeability/porosity/inversion分类
数理科学引用本文复制引用
曹渊,牛冠毅,王铁良,王英杰..基于原位渗透率试验反演岩石孔隙度的新方法[J].岩土力学,2017,38(1):272-276,5.基金项目
国家自然科学基金(No.91330205)资助项目.This work was supported by the National Science Foundation of China (91330205). （No.91330205）
