Full-automatic testing method and system of unconventional ultralow core permeability

Abstract

The invention provides a full-automatic testing method and system of unconventional ultralow core permeability. The method comprises the following steps of step1, sampling a core, placing in a core clamp holder, and arranging the peripheral environment and pressure; step2, acquiring an initial parameter of a sample, and carting out automatic testing; and step3, acquiring a decay curve and calculating the permeability.

Description

technical field [0001] The invention relates to geological exploration technology, more specifically, to a fully automatic testing method and system for ultra-low permeability of unconventional rock cores. Background technique [0002] As a porous medium, rock contains a large number of microcracks and pores. The flow of various fluids in porous media is the most important process of material transport in rocks, and has a direct impact on the migration and storage of oil and gas in petroleum geology. [0003] Permeability is the most important parameter describing the transport characteristics of rocks. It indicates the ease with which fluid flows through rocks and is a key physical parameter restricting the transport process. For the same type of rock, due to the difference in its formation environment and internal structure, the variation of its permeability can reach several orders of magnitude, while for different types of rocks, the variation range of its permeability ...

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Problems solved by technology

However, the above-mentioned method usually needs to measure many physical quantities, which wastes time and cannot acquire the multiple physical quantities synchronously, making the measurement accuracy and timeliness relatively poor.

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