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A method and system for testing the entry depth of profile control and water plugging agent in layered reservoirs

A technology for profile control, water shutoff, and depth testing. It is used in surveying, earth-moving drilling, and fluid production. It can solve problems such as immaturity.

Inactive Publication Date: 2016-05-25
CHINA UNIV OF GEOSCIENCES (BEIJING)
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Problems solved by technology

At present, although some scholars have proposed a processing method for the inversion of polymer phase permeability data, it is still immature.

Method used

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  • A method and system for testing the entry depth of profile control and water plugging agent in layered reservoirs
  • A method and system for testing the entry depth of profile control and water plugging agent in layered reservoirs
  • A method and system for testing the entry depth of profile control and water plugging agent in layered reservoirs

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Embodiment Construction

[0047] At present, the numerical simulation method of chemical flooding has been relatively perfect, which can describe plugging agent plugging, viscosity change, interfacial tension change, oil displacement efficiency change, adsorption, shear, physical and chemical reaction, salt sensitivity, diffusion and isotonic flow in the process of deep profile control mechanism. In this patent, the flow velocity of the plugging agent in the channeling channel is much higher than the seepage velocity of the blocking agent in the non-channeling area, and the strong heterogeneity of the injection velocity will lead to the strong heterogeneity of the pressure, and finally lead to the strong capillary number heterogeneity, and capillary number is very sensitive to the influence of relative permeability morphology. Therefore, in order to accurately calculate the distribution law of the plugging agent, it is necessary to obtain the relative permeability curves of the plugging agent at differ...

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Abstract

The invention provides a method and a system for testing the entering depth of a stratified oil deposit profile control water plugging agent. The method comprises the following steps: step 1, establishing a cross flow anisotropic physical simulation model by virtue of a plugging agent distribution law physical simulation method, and obtaining a physical simulation result by use of cross flow anisotropic physical simulation model; step 2, establishing a numerical simulation model by virtue of a plugging agent distribution law numerical simulation method, drawing a relative permeability curve of plugging agents with different displacement velocities, and modifying the numerical simulation model by use of the relative permeability curve of the plugging agents so as to obtain a numerical simulation result; step 3, analyzing the planar distribution law and longitudinal distribution law of the plugging agent under different injection pressures by virtue of comprehensively utilizing the fit physical simulation result and the numerical simulation result; establishing a scaled model of the plugging agent entering into a cross flow region and an non-cross flow region according to the analysis result; step 4, establishing a plugging agent dosage optimization method of the stratified oil deposit profile control water plugging agent by utilizing the scaled model of the plugging agent entering into the cross flow region and the non-cross flow region.

Description

technical field [0001] The invention relates to the technical field of profile control and water shutoff control, in particular to a method and system for testing the penetration depth of a profile control water shutoff agent in layered reservoirs. Background technique [0002] At present, there are mainly two methods for studying the distribution of plugging agent or polymer: the physical simulation method of plugging agent distribution mode in the deep profile control process and the numerical calculation method of plugging agent distribution mode in the deep profile control process. Among them, the contribution of the physical simulation method of plugging agent distribution mode in the deep profile control process is: it can explain the planar distribution mode of plugging agent, obtain the planar distribution mode of polymer under the influence of channeling channel, and analyze the sweep coefficient and oil displacement efficiency of polymer flooding Contribute to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B47/10E21B43/22
Inventor 王硕亮张媛桑国强赵莹莹于春磊赵辉张贤松杨滨叶双江王娟
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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