Preparation method of fragile coal rock and testing technology of its porosity and permeability parameters
The standard plunger is difficult to prepare with coal rock due to its strong brittleness and development of joints and fractures,which makes it difficult to carry out the conventional porous and permeable experiment.This paper used core pouring technology to establish a non-plunger coal rock porosity and permeability measurement method.After the fragile coal rock was cut into cuboids,the coal rock cuboids were molded into a cylinder with ep-oxy resin glue,and the porosity and permeability tests were carried out.The experimental results show that when the cross-sectional area of the coal rock core is prepared into a 25 mm×25 mm cuboid.The porosity and permeability tested with it have a good correlation with those by the plunger core.The porosity and permeability correlation coef-ficients reach 0.922 1 and 0.954 3,respectively.Thus,the brittle cores of coal rock can meet the test requirements of experimental equipment and provide strong support for the physical parameters of reservoirs.
coal and rockartificial coreporositypermeabilitycylindrical shape
NETL
NSTL
万方数据
维普
