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Method and system for determining single-well dynamic reserves and recoverable reserves of gas drive reservoir

A technology for dynamic reserves and determination methods, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc. It can solve problems such as work efficiency and calculation accuracy need to be improved, and achieve the effect of improving calculation efficiency and calculation accuracy.

Active Publication Date: 2021-07-13
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

Therefore, the work efficiency and calculation accuracy of the existing calculation methods for single well dynamic reserves and recoverable reserves of gas drive reservoirs need to be improved

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  • Method and system for determining single-well dynamic reserves and recoverable reserves of gas drive reservoir
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  • Method and system for determining single-well dynamic reserves and recoverable reserves of gas drive reservoir

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Embodiment Construction

[0062] Next, the technical solutions in the embodiments of the present invention will be apparent from the embodiment of the present invention, and it is clearly described, and it is understood that the described embodiments are merely embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0063] In order to make the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0064] Due to the correlation coefficient of the two-phase relative permeability ratio of the oil-gas two-phase relative penetration ratio and the gas saturation degree of the oil-gas-containing degree, the correlation coefficient of the binary fitting curve containing gas saturation is larger than...

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Abstract

The invention discloses a method and system for determining single-well dynamic reserves and recoverable reserves of a gas drive reservoir. The method comprises the steps that according to the material balance principle, the gas saturation of the gas drive reservoir is calculated; according to the Darcy law, the relation between the oil-gas two-phase relative permeability ratio and the oil-gas two-phase flow is established; based on an oil-gas two-phase seepage law, a binomial relationship between the oil-gas two-phase relative permeability ratio and the gas saturation is fitted; and on the basis of the established relationship and the gas saturation, a gas drive characteristic curve relational expression between the production gas-oil ratio and cumulative oil production under the constant seepage condition of the gas drive reservoir is established, and on the basis of the binomial relationship and the binomial regression coefficient of the gas drive characteristic curve relational expression, the single-well dynamic reserves and recoverable reserves of the gas drive reservoir are calculated. According to the method and system, the calculation efficiency and the calculation precision of the single-well dynamic reserves and the recoverable reserves of the gas drive reservoir can be improved.

Description

Technical field [0001] The present invention relates to the field of reservoir engineering, and in particular, a single well dynamic reserve and a canable reserver determination method and system for a gas-drive reservoir. Background technique [0002] The basis of the derivation and establishment of a conventional gas-drive feature curve is that the ratio of oil-gas two-phase relative penetration ratios and gas-containing saturation are linearly related in semi-logarithmic coordinates, and relatively permeable for actual oil-gas two-phase relative penetration ratios The relationship with gas-containing saturation is in linear relationship only when the gas saturation is in the intermediate stage. Therefore, the single well dynamic reserves of the existing gas reservoir and the calculation accuracy of the calculation method of the method of reserves are improved. Inventive content [0003] Based on this, it is necessary to provide a single well dynamic reserve with a gas reservo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/16
CPCE21B49/00E21B43/168Y02A10/40
Inventor 胡书勇郑冰洋宋娜娜郭学强
Owner SOUTHWEST PETROLEUM UNIV
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