Plane heterogeneous model water-invasion simulation experiment method and experiment device thereof

Abstract

The invention relates to a plane heterogeneous model water-invasion simulation experiment method and an experiment device thereof. The experiment method comprises the following steps of selecting heterogeneous rock core samples; loading the rock core samples into a rock core clamping device to form model units, placing at least four model units to form a plane heterogeneous model, and applying surrounding pressure to each model unit; adopting a high-pressure gas source to fill saturated gas into a pore of each rock core sample, and when the pressure of the pore in each rock core sample is balanced to the required value of experiment, stopping filling of saturated gas and closing the gas source; adding water into a middle container, and pressurizing to the preset pressure of experiment, so as to form a simulation water body; communicating one end of each rock core sample of the saturated gas and the simulation water body; by controlling via a valve, releasing the gas in the pore of each rock core sample from the other end of the corresponding rock core sample, recording experiment parameters, and finishing experiment when the amount of air flow is zero. The experiment method and the experiment device can truly reflect the water invasion mechanism of the gas reservoir, study the water invasion rule of the plane heterogeneous model of the gas reservoir, and provide reference for the scientific development of the gas reservoir.

Description

technical field [0001] The invention relates to an oil-gas field development core experiment analysis technology, in particular to a plane heterogeneous model water invasion simulation experiment method and an experiment device thereof. Background technique [0002] The development of most gas reservoirs shows that planar non-uniform water invasion will lead to a significant decline in gas well productivity and gas reservoir recovery, which has become one of the important risk factors affecting the development effect. Therefore, it is urgent to strengthen the experimental research of water invasion and reveal the mechanism of water invasion , analyze and predict water invasion risk, and provide technical support for water control development of gas reservoirs. [0003] At present, the experimental methods for the study of water intrusion in gas reservoirs mainly include the low-pressure microscopic visual physical simulation experiment method [Fan Huaicai, Zhong Bing, Li Xia...

AI Technical Summary

Problems solved by technology

The low-pressure microscopic visual physical simulation experiment method is difficult to reflect the real gas reservoir water invasion mechanism because the experimental pressure is low, and the model used is generally a glass etching model instead of a real gas reservoir core; the one-dimensional core physical simulation experiment method generally uses The homogeneous model or the fracture-pore model is difficult to reflect the heterogeneity characteristics of the gas reservoir. Provide basis for scientific development

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