Instrument for measuring relative permeability of low permeability reservoir using nuclear magnetic resonance

Abstract

The invention discloses an instrument for measuring the relative permeability of a low permeability reservoir using nuclear magnetic resonance. The instrument comprises hardware and software, wherein the hardware comprises a non-magnetic rock sample clamp, a pressure-bearing container, a gas drying device, an electronic balance and a gas flow measurement device; and the software comprises a communication acquisition module, a data arrangement module, a data display module, a data recording module, an experiment process control module and a data exporting module. The instrument can be used for a measurement experiment of the relative permeability of gas and water of a non-conventional reservoir and can accurately provide experimental parameters to achieve the aim of dynamically monitoring the fluid distribution and the flowing rule.

Description

technical field [0001] The invention belongs to the technical field of experimental equipment for testing the permeability of low-permeability reservoirs such as coal and shale, and in particular relates to an instrument for measuring the relative permeability of low-permeability reservoirs combined with nuclear magnetic resonance. Background technique [0002] The relative permeability parameter of coal reservoir is one of the key parameters for the simulation evaluation of coal reservoir and the dynamic prediction of coalbed methane well output. Accurately obtaining the relative permeability of coal reservoir is of great significance for the exploitation of coalbed methane. At present, the relative permeability analysis method of conventional reservoirs (petroleum industry standard: SY / T5843-1997) is an important way to obtain the relative permeability of low-porosity and low-permeability reservoirs. Although the application of this method in conventional reservoirs is very...

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Problems solved by technology

[0007] In order to solve the problem that the conventional reservoir relative permeability measurement instrument has large errors in the experimental parameters such as fluid saturation and fluid flow measured for low-porosity and low-permeability unconventional reservoirs, the present invention provides a low-permeability sensor combined with nuclear magnetic resonance technology. Reservoir permeability measuring instrument, used for unconventional reservoir gas and water relative permeability measurement experiments, accurately giving test parameters and achieving the purpose of dynamic monitoring of fluid distribution and flow laws

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