Prediction method and system of oil, gas and water microscopic seepage law in vertical gas injection pores

A microscopic seepage, oil-gas-water technology, applied in the field of oil and gas reservoirs, can solve the problems of not being able to provide references for oilfield gas injection development, unfavorable oilfield gas injection development and improvement of oil recovery, and achieve the effect of improving oil recovery

Active Publication Date: 2020-06-05
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 pore scales, and cannot provide a reference for oilfield gas injection development, which is not conducive to oilfield gas injection development and development. Enhanced Oil Field Recovery

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  • Prediction method and system of oil, gas and water microscopic seepage law in vertical gas injection pores
  • Prediction method and system of oil, gas and water microscopic seepage law in vertical gas injection pores
  • Prediction method and system of oil, gas and water microscopic seepage law in vertical gas injection pores

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Embodiment Construction

[0047] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0048] 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 specifically implemented in the following forms, namely: complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0049] In view of the fact that the p...

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Abstract

The invention provides a method and system for predicting an oil, gas and water microscopic seepage law of vertical gas injection pores. The method for predicting the oil, gas and water microscopic seepage law of the vertical gas injection pores comprises the following steps that a gravity model, a capillary force model, an injection pressure model and a viscous resistance model are established according to physical property parameters of all the pores; a flow speed model of a fluid is deduced according to the gravity model, the capillary force model, the injection pressure model and the viscous resistance model; and the flowing speed of the fluid is obtained based on the flow speed model according to actual pore physical property parameters, and the flow speed is used for predicting the oil, gas and water microscopic seepage law of the vertical gas injection pores. The reference basis can be provided for oilfield gas injection development, design of a reasonable gas injection development scheme is facilitated, the development process of a carbonatite oil and gas reservoir is further guided, and the recovery rate of oilfields is increased.

Description

Technical field [0001] The invention relates to the field of oil and gas reservoirs, and in particular to a method and system for predicting the microscopic seepage law of oil, gas and water in vertical gas injection pores. Background technique [0002] Among the oil and gas reservoirs discovered in the world, carbonate oil and gas reservoirs occupy an important position. About 57% of the global oil and gas reserves come from carbonate oil and gas reservoirs. Carbonate reservoirs mainly include three basic pore structure types: fracture-cavity type, fracture type and pore type, of which more than 30% are fracture-cavity reservoirs. [0003] Gas injection is an important exploitation method for fractured-vuggy carbonate reservoirs and is often used in the middle and late stages of reservoir development. 2 , CO 2 Such immiscible flooding has achieved better results in enhancing oil recovery. The characteristics of low gas density and significant gravity differentiation of oil and ga...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/16E21B47/00G09B25/04
CPCE21B43/166E21B47/00G09B25/04
Inventor 王付勇程倩赵久玉朱桂良袁诺程辉
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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