Method and apparatus for measuring permeability of porous rock

Abstract

An embodiment of the invention provides a method and an apparatus for measuring permeability of a porous rock. The method comprises the steps of acquiring a compression coefficient of a to-be-measured rock sample in a semi-closed condition; acquiring a compression coefficient of the to-be-measured rock sample in a totally-enclosed condition; and acquiring a permeability parameter of the to-be-measured rock sample according to the compression coefficient of the to-be-measured rock sample in the semi-closed condition and the compression coefficient of the to-be-measured rock sample in the totally-enclosed condition. The technical solution disclosed by the invention has the following technical advantages that 1) actually, elastic properties and the permeability property of the rock are evaluated at the same time, so that the evaluation is more objective; 2) the method and the apparatus are more beneficial to reservoir prediction and fluid identification aimed at exploration and to oil and gas resource assessment and development aimed at oil-gas field development; and 3) relatively accurate estimation (10<-8>-10<-2> Darcy) can be achieved in a large range of the permeability values by using the apparatus and the method provided by the invention, and the apparatus and the method provided by the invention have stronger applicability for reservoir rock samples with medium or high permeability.

Description

Technical field [0001] The invention relates to the technical field of oil and gas field exploration and development, in particular to a method and device for measuring the permeability of pore rocks. Background technique [0002] The reservoir rock is a porous medium, and the porosity and permeability of the rock are two reservoir characteristics that people are concerned about. Porosity determines the storage performance of the rock, that is, the oil and gas reserves per unit volume of rock. Permeability is the ability of reservoir rocks to allow fluids (oil, gas, and water) to pass through under a certain pressure difference. Permeability is expressed by permeability. [0003] In the process of oil and gas field exploration and development, accurate measurement of permeability is the geological basis for oil and gas resource evaluation and development plan design. Therefore, the accurate calibration of rock permeability directly affects the production of oil and gas wells; whet...

AI Technical Summary

Problems solved by technology

[0007] To sum up, the various measurement methods currently used for conventional testing of rock permeability have their own advantages, disadvantages and scope of application (rock samples with different levels of permeability)

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