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Method for determining low-permeability oil reservoir development means

A low-permeability, oil-reservoir technology, applied in the fields of fluid production, earth-moving drilling, measurement, etc., can solve the problems of poor water-flooding development effect, waste of manpower and material resources, and inability to extract more crude oil.

Pending Publication Date: 2021-07-09
PETROCHINA CO LTD
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Problems solved by technology

[0004] However, for low-permeability reservoirs (permeability less than 50mD), due to the characteristics of low abundance and low pressure in low-permeability reservoirs, the water flooding development effect is poor
As a result, it is possible that after water flooding, more crude oil cannot be extracted, and the economic benefit is poor, resulting in a waste of manpower and material resources

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  • Method for determining low-permeability oil reservoir development means
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Embodiment Construction

[0052] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0053] figure 1 is a flow chart of a method for determining low-permeability reservoir development methods provided by an embodiment of the present disclosure, such as figure 1 As shown, the development method includes:

[0054] S101. Determine the technical limit well spacing of the low-permeability reservoir.

[0055] In step S101, the technical limit well spacing is the sum of the limit production radius of the production well using the water flooding production method and the limit water injection radius of the corresponding water injection well in the low-permeability reservoir, and the limit production radius is the maximum diameter that the production well can control. The limit water injection radius is the maximum radial d...

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Abstract

The invention provides a method for determining a low-permeability oil reservoir development means, and belongs to the field of oil development. The method comprises the steps that the technical limit well spacing of a low-permeability oil reservoir is determined; the economic limit well spacing of the low-permeability oil reservoir is determined; when the technical limit well spacing is larger than the economic limit well spacing, a water-drive oil recovery method is used as the development means of the low-permeability oil reservoir; and when the technical limit well spacing is not larger than the economic limit well spacing, a development means selection model of the low-permeability oil reservoir is established, and one of a volume fracturing dialysis oil recovery method, an energy-increasing huff and puff oil recovery method and a gas-drive oil recovery method is determined as the development means of the low-permeability oil reservoir based on the development means selection model. According to the method for determining the low-permeability oil reservoir development means, the appropriate development means can be determined and selected.

Description

technical field [0001] The disclosure belongs to the field of petroleum development, and in particular relates to a method for determining the development means of low-permeability reservoirs. Background technique [0002] Water flooding is a conventional reservoir development method, which is widely used in reservoir development because of its simple operation and environmental protection. [0003] In reservoir development, permeability refers to the ability of the reservoir as a whole to allow fluid to pass through under a certain pressure difference. It is an important indicator to characterize the physical properties of the reservoir. The higher the permeability, the better the water flooding effect. The higher the reservoir, the greater the economic benefits achieved. [0004] However, for low-permeability reservoirs (permeability less than 50mD), due to the characteristics of low abundance and low pressure in low-permeability reservoirs, the water flooding development...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B47/00E21B43/30E21B43/20
CPCE21B49/00E21B47/00E21B43/30E21B43/20Y02A10/40
Inventor 孙建吕中锋何娇娇王庆魁马瑞季岭倪天禄董洪闯王飞李和荣周连敏夏瑛
Owner PETROCHINA CO LTD
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