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Four-phase seepage simulation method for movable gel system

A simulation method and gel technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to fully reflect the characteristics of underground seepage and disconnection of movable gel systems

Active Publication Date: 2017-03-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technologies all adopt the assumption that water and colloid are homogeneous and continuous colloids, which cannot fully reflect the underground seepage characteristics of the movable gel system, resulting in a disconnect between the movable gel simulation mechanism and domestic field applications

Method used

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  • Four-phase seepage simulation method for movable gel system
  • Four-phase seepage simulation method for movable gel system
  • Four-phase seepage simulation method for movable gel system

Examples

Experimental program
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Effect test

Embodiment 1

[0134] This example provides a four-phase seepage simulation method for a movable gel system, which divides the movable gel system into two parts, the movable gel and the colloidal particles, and establishes a four-phase seepage model for the movable gel system, On this basis, the four-phase seepage mathematical model of oil phase, gas phase, water phase and colloidal particles is constructed, and the specific steps ( figure 1 It is a schematic flow chart of the method) including:

[0135] Step S11, during the seepage process of the porous medium, the movable gel system is divided into two parts, the movable gel and the colloidal particles, and a characteristic equation characterizing the generation and degradation of the colloidal particles is established;

[0136] Step S12, establishing a calculation method for the relative permeability of the four-phase seepage model of the movable gel system;

[0137] Step S13, establishing characteristic equations characterizing the visc...

Embodiment 2

[0269] This example provides a verification experiment for implementing a four-phase seepage simulation method for a movable gel system.

[0270] In order to have a more intuitive understanding of the application effect of a four-phase seepage simulation method for a movable gel system provided in Example 1, the calculation program compiled using the above method is now used to simulate the displacement experiment of the movable gel in the sand-packing pipe. The fitting result shows that the present invention can simulate the actual seepage process of the movable gel system with high accuracy.

[0271] In this embodiment, the experimental parameters of the sand filling pipe are shown in Table 1; the specifications of the sand filling pipe are shown in Table 2.

[0272] In this example, the measured pressure curve of the displacement experiment of the movable gel system in the sand filling pipe is as follows: image 3 shown; the pressure curve fitted by the displacement experi...

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Abstract

The invention provides a four-phase seepage simulation method for a movable gel system. The method includes the steps of dividing the movable gel system into a movable gel and a gel particle, establishing a movable gel system four-phase seepage model containing the gel particle, and based on the model, establishing a four-phase seepage mathematical model taking an oil phase, a gas phase, a water phase and the gel particle into account and containing a four-phase continuity equation, initial conditions, boundary conditions and a characteristic equation. According to the method, the gel particle serves as an independent phase different from the oil phase, the gas phase and the water phase, main physical and chemical mechanisms for profile control and oil displacement of the movable gel system are comprehensively described, and simulated prediction results are high in availability, targeting property and accuracy, so that the four-phase seepage simulation method for profile control and oil displacement of the movable gel system in accordance with geological characteristics and development characteristics of Chinese oil fields can be achieved.

Description

technical field [0001] The invention belongs to the technical field of gel regulation and displacement seepage mechanism and numerical simulation method, and in particular relates to a four-phase seepage simulation method of a movable gel system. Background technique [0002] The main mechanism of the control and displacement of the mobile gel system is to produce a weak mobile gel through the action of the polymer and the cross-linking agent. The movable gel system can block the high-permeability layer, forcing water to flow to the middle and low-permeability parts or layers with more remaining oil, which is the mechanism of "adjustment". At the same time, the mobile gel system is a fluid system with high viscosity, which can improve the water flooding mobility ratio and improve the sweep efficiency of injected water, which is the mechanism of "flooding". However, due to the high price of chemical agents and high technical risk, it is necessary to use reservoir numerical s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 刘同敬侯吉瑞第五鹏祥巨美歆吴海荣周建王佳丁奕人陈隽雷小乐赵乐坤
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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