Laboratory Study on Stress Sensitivity of Fractured Reservoir with Low Permeability

There exists obvious stress-sensitive in the development of fractured low permeability reservoirs.Variable peripheral pressure,which is the laboratory test method,is used in this article to carry on the experiments and analyses upon porosity and permeability of fractured reservoir with low permeability to investigate the laws between the porosity,permeability of rock and the effective pressure.It is proved by experiments that the porosity and permeability of rock will drop regularly along with the increasing of the effective pressure,and has had the irreversible stress harm.The rock displays the greatly strengthened stress sensitivity.