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Prediction method and system of oil-gas-water microscopic seepage law in vertical gas injection fractures

A microscopic seepage, oil and gas water technology, applied in the field of oil and gas reservoirs, can solve the problems of inability to provide reference for oilfield gas injection development, unfavorable oilfield gas injection development and improvement of oilfield recovery rate, etc., and achieve the effect of improving oil recovery rate

Active Publication Date: 2020-04-17
CHINA UNIV OF PETROLEUM (BEIJING) +2
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Problems solved by technology

Gas injection and oil recovery can improve oil recovery, but the existing technology cannot effectively reveal the influence of different forces on the multiphase flow law at different fracture scales, and cannot provide a reference for oilfield gas injection development, which is not conducive to oilfield gas injection development and development. Enhanced oil recovery

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  • Prediction method and system of oil-gas-water microscopic seepage law in vertical gas injection fractures
  • Prediction method and system of oil-gas-water microscopic seepage law in vertical gas injection fractures
  • Prediction method and system of oil-gas-water microscopic seepage law in vertical gas injection fractures

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Embodiment Construction

[0052] 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.

[0053] Those skilled in the art know that the embodiments of the present invention can be implemented as a system, device, device, method or computer program product. Therefore, the present disclosure may be embodied in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0054] In view of the fact that the existing technology cannot effectively reveal the influe...

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Abstract

The invention provides a method and system for predicting the oil-gas-water microscopic seepage law in vertical gas injection fractures. The prediction method of oil-gas-water microscopic seepage law in vertical gas injection fractures includes: establishing gravity model, capillary force model, injection pressure model and viscous resistance model according to the physical parameters of each fracture; The fluid flow velocity model is derived from the viscous resistance model; the fluid flow velocity is obtained based on the actual fracture physical parameters based on the flow velocity model, and the flow velocity is used to predict the microscopic seepage law of oil, gas and water in vertical gas injection fractures, which can be used for oilfield gas injection development. Providing a reference basis is helpful to design a reasonable gas injection development plan, further effectively guide the development process of carbonate reservoirs, and improve oil recovery.

Description

technical field [0001] The invention relates to the field of oil and gas reservoirs, in particular to a method and system for predicting oil, gas and water microscopic seepage laws in vertical gas injection fractures. Background technique [0002] Fractured-vuggy carbonate reservoirs are mainly composed of pores, fractures, and caves. Fractures are not only storage spaces for crude oil, but also important channels for fluid flow. The research shows that the fluid flow inside the fracture does not belong to the category of seepage, and the general seepage theory cannot be used to explain the fluid flow inside the fracture. A single fracture, as the basic unit of a fractured reservoir, is the basis of various seepage theoretical models. The famous Russian fluid scientist Bousinsineski deduced the cubic law of rock mass fracture seepage on the basis of the general differential equation of viscous liquid motion . [0003] There are obvious phase interfaces in the two-phase or ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F2119/06G06F30/20
Inventor 王付勇赵久玉宋传真程倩杨坤
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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