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A new method of flow field characterization

A new method and technology of flow field, applied in the field of oilfield development, which can solve the problems of interactive influence, large uncertainty of parameter weights, and ambiguity.

Active Publication Date: 2019-08-06
PETROCHINA CO LTD
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Problems solved by technology

[0006] The selection of existing flow field characterization parameters has problems such as mutual correlation and large uncertainty in parameter weights. First, single characterization: seepage parameters alone represent flow field strength, permeability, pressure, saturation, and water content; the disadvantages are The absolute value of a single characterization index changes little during the high water cut period. Second, comprehensive characterization: fuzzy mathematics comprehensively characterizes flow field strength, permeability, pore throat radius, displacement multiple, water passing multiple, fluid velocity, and water cut; the disadvantage is that each parameter The uncertainty of the weight value is large; the interaction between the parameters

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[0080] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0081] see Figure 1-12 , a new method for flow field characterization, including the following steps:

[0082] Step A, establishment of the flow field characterization parameter set, through the study of flow field influencing factors, the flow field characterization parameter set is established;

[0083] Among them, the influencing factors of flow field include static factors and dynamic factors. Static factors are the geological basis for the formation and...

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Abstract

The invention discloses a novel method for flow field characterization. The method comprises the steps of flow field characterization parameter set establishment, parameter weight determination, parameter standardization processing, flow field strength comprehensive characterization index establishment, flow field strength grading standard establishment and flow field distribution characteristic research. The beneficial effects of the invention are as follows: characterization parameters with the large influence degree are obtained through parameter optimization[ the membership degree and weight of each characterization parameter are determined by using fuzzy mathematics and an analytic hierarchy process; further, parameter coupling is carried out to form a unified characterization parameter; quantitative description of an oil reservoir flow field is realized; the flow field intensity index of each grid is calculated by using Eclipse numerical simulation software; the probability distribution of the reservoir is counted, the characterization indexes of the flow field and the potential are clear, the judgment standard and the regulation countermeasure of a regulation potential areaare determined, the flow field description, evaluation and reconstruction technology for the reservoir is formed, and technical support is provided for further improving the recovery ratio of an oil field.

Description

technical field [0001] The invention relates to a flow field characterization method, in particular to a new flow field characterization method, and belongs to the technical field of oil field development. Background technique [0002] The flow of reservoir fluid in porous media forms a flow field, which is the spatial distribution of reservoir fluid in subterranean porous media, and the strength of reservoir flow field is expressed by flow field intensity. The remarkable feature of reservoir flow field is its evolution. [0003] Initial stage of development: The injection-production system has not been fully established, and the flow field distribution is stable. [0004] Mid-development stage: The improvement of the injection-production system and the influence of reservoir heterogeneity lead to the inhomogeneity of flow field intensity distribution beginning to appear, and the dominant flow field and non-dominant flow field begin to form. [0005] Later stage of develop...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06Q10/06G06Q50/02
CPCG06Q10/06393G06Q50/02G06F30/20Y02A10/40
Inventor 芦凤明武玺倪天祿陶自强张家良朱红云张阳
Owner PETROCHINA CO LTD
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