High-temperature triaxial porosity and permeability testing device and method

Abstract

The invention provides a high-temperature triaxial porosity and permeability testing device and method, belonging to the field of testing apparatuses and methods for triaxial porosity and permeabilityexperiments. The high-temperature triaxial porosity and permeability testing device comprises a pressure control system, a triaxial rock core or coal core holder, a particle volume holder, a gas massflow meter, a data acquisition and processing system, a temperature control system and a vacuum-pumping system. The high-temperature triaxial porosity and permeability testing device can simulate thetemperature and pressure conditions of oil and gas reservoirs in a laboratory, calculate the permeability and porosity of a core material and determine the permeability and pore volume of an equivalent gas phase. The high-temperature triaxial porosity and permeability testing device has the advantages that (1) the control temperature of the device is in a range of normal temperature to 180 DEG C;(2) when the device is used for measuring porosity, the diameter of a core material may be 25 mm or 50 mm, and the height of the core material is selectable; (3) when the device is used for measuringpermeability, the diameter of the core material may be 25 mm or 50 mm; (3) when the device is used for measuring porosity, standard components of different heights can be selected; (5) the flow meterof the device is located at the upper stream; and (6) when a sample is to be loaded, gas can be utilized for automatic pushing of the sample.

Description

technical field [0001] The invention relates to a triaxial porosity and permeability testing device and method, in particular to a high-temperature triaxial porosity and permeability testing device and method suitable for rock porosity and permeability experiments. Background technique [0002] The porosity and permeability of rock are important parameters for evaluating oil and gas reservoirs and calculating reserves. They are generally measured at normal temperature and pressure. The parameter data measured at normal temperature and pressure cannot truly represent the reservoir reserves. The real characteristics of layer physical properties. Theory shows that changes in temperature and pressure have a significant impact on the porosity and permeability of rocks. [0003] At present, in the measurement of rock porosity and permeability, foreign countries have high measurement accuracy, but they can only change the pressure but not the temperature; the domestic patent No. C...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a high-temperature triaxial porosity and permeability testing device and method capable of testing rock porosity and permeability under high temperature and triaxial stress conditions, in order to solve Problems in core material porosity and permeability testing under high temperature and triaxial pressure conditions

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