A water lock release ability evaluation device for coupled detection of saturation and permeability

Abstract

The invention discloses a water lock release capability evaluation device for coupling detection of saturability and permeability. The device comprises a water lock control system, a saturability detection system and a permeability detection system, wherein the water lock control system is used for saturating liquid or a partially saturating liquid on a core; the saturability detection system comprises a signal generating and processing system and an electrode; the signal generating and processing system comprises an alternating current (AC) excitation source, an inductive module, a signal processing system and an imaging processing and control system which are sequentially and electrically connected; the permeability detection system is configured to apply a confining pressure to the coreand inject a gas source into the core, and the permeability of the core is obtained by utilizing the differential pressure of the two ends of the core and the flow rate of the gas source circulatingin the core. The device is simple in structure, easy to implement and convenient to maintain, can realize the real-time measurement of a core saturation field and the permeability at the same time, and can monitor the coupling relationship between the saturation field and the permeability in real time after the core is contacted with water, thus realizing the quantitative evaluation of the relationship between the saturation field and the permeability.

Description

technical field [0001] The invention relates to a water lock release ability evaluation device for coupled detection of saturation and permeability, which belongs to the field of oil and gas field development engineering and porous medium seepage mechanism research Background technique [0002] With the adjustment of energy structure and the continuous development of unconventional energy, the experience of unconventional resource development is also maturing. Hydraulic fracturing has played a huge role in the development of unconventional reservoirs. Conventional reservoirs represented by sandstone have high permeability, large porosity, relatively simple pore-throat structure, and high silica content in the rock matrix. When fracturing fluid enters such rocks, it will block the gas flow channels and form water lock damage. Therefore, for conventional sandstone reservoirs, enhancing flowback is one of the key points of research. However, in unconventional reservoirs, espe...

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Problems solved by technology

At present, there is no suitable instrument to quantitatively evaluate the water lock release ability of the core

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