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Polymer flooding seepage simulation method and system

A technology of seepage simulation and polymer, which is applied in the field of polymer flooding seepage simulation realization method and system, which can solve the incomplete description of polymer flooding seepage mechanism, limited availability, pertinence and accuracy of block simulation results, and failure to meet on-site requirements. Application and other issues

Active Publication Date: 2018-05-01
CHINA NAT OFFSHORE OIL CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a polymer flooding simulation realization method and system, which can solve the incomplete description of some important polymer flooding seepage mechanisms in the current polymer flooding simulation method, which cannot meet the needs of field applications. Issues with limited availability, pertinence and accuracy of block simulation results

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  • Polymer flooding seepage simulation method and system
  • Polymer flooding seepage simulation method and system
  • Polymer flooding seepage simulation method and system

Examples

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Embodiment 1

[0092] In order to achieve the purpose of the embodiment of the present invention, the embodiment of the present invention provides a polymer flooding seepage simulation realization method, such as figure 1 As shown, the method may include S11-S12:

[0093] S11. Obtain the three-phase state equations of oil, water, and gas followed by polymer flooding based on multiple pre-established mathematical characterization equations; among them, multiple mathematical characterization equations are respectively established according to various characteristics of polymers in the seepage process .

[0094] Optionally, the multiple mathematical characterization equations may include: a mathematical characterization equation for polymer mechanical degradation, a mathematical characterization equation for polymer dynamic adsorption, a mathematical characterization equation for polymer clogging mechanism, and a mathematical characterization equation for polymer viscosity-increasing properties...

Embodiment 2

[0201] In order to have a more intuitive understanding of the application effect of a new polymer flooding simulation method provided in Example 1, the corresponding calculation program was compiled using the above method, and based on the typical parameters of a polymer flooding test area in China, the aggregate The effects of adsorption, shear degradation, and mechanical dispersion.

[0202] In this example, the typical geological parameters of a polymer flooding test area are shown in Table 1.

[0203] In this example, the typical physical parameters of a polymer flooding test area are shown in Table 2.

[0204] In this example, the typical dynamic parameters of a polymer flooding test area are shown in Table 3.

[0205] In this example, the water flooding recovery degree and water cut curve of a certain polymer flooding test area when polymer adsorption is considered and not considered are as follows: figure 2 shown. Among them, the upper dark curve indicates the exist...

Embodiment 3

[0216] In order to achieve the purpose of the embodiment of the present invention, the embodiment of the present invention also provides a polymer flooding seepage simulation realization system 1. It should be noted that any of the above method embodiments are applicable to the system embodiment of the present invention , which will not be repeated here. like Figure 5 As shown, the system includes: a building block 11 and a simulation module 12;

[0217] The building block 11 is used to obtain the three-phase state equations of oil, water, and gas followed by polymer flooding based on a plurality of pre-established mathematical characterization equations; wherein the multiple mathematical characterization equations are based on various Features are built separately;

[0218] The simulation module 12 is used to perform the preset conventional polymer flooding follow-up oil, water, and gas three-phase continuity equation and the mass transfer diffusion equation when the chemi...

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Abstract

Embodiments of the invention disclose a polymer flooding seepage simulation method and system. The method comprises the following steps of: obtaining oil-phase, water-phase and gas-phase state equations abided by polymer flooding on the basis of a plurality of pre-established mathematic representation equations; and solving preset oil-phase, water-phase and gas-phase continuous equations abided byconventional polymer flooding and a mass transfer diffusion equation when chemical matters in polymer systems are transferred in water on the basis of the established state equations so as to realizepolymer flooding seepage simulation. The plurality of mathematic representation equations comprises a polymer mechanical degradation mathematic representation equation, a polymer dynamic adsorption mathematic representation equation, a polymer blockage mechanism mathematic representation equation and a polymer tackifying characteristic mathematic representation equation. Through the method and system, the problems that the current polymer flooding simulation method insufficiently describes a part of important polymer flooding seepage mechanisms and cannot satisfy demands of field applications, and the availability, pertinence and correctness of a part of block simulation results are limited are solved.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of polymer flooding seepage flow mechanism and numerical simulation method, and in particular to a polymer flooding seepage flow simulation implementation method and system. Background technique [0002] The large-scale test and application of polymer flooding in my country has been carried out for more than 20 years. It is the main method in tertiary oil recovery, and it is also the focus of further improvement and promotion in the future. Due to the complexity of tertiary oil recovery technology and the high investment and high risk of the test, it is necessary to use reservoir numerical simulation technology to assist research and predict indicators, which has important practical significance for guiding field tests and oilfield development. [0003] At present, almost all the polymer flooding simulation theories put into commercial application are established based on foreign re...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02A10/40
Inventor 鞠野刘文辉李翔铁磊磊徐国瑞刘丰钢王冠华
Owner CHINA NAT OFFSHORE OIL CORP
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