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Oil reservoir water content and oil recovery percentage relation determining method and device

A technology of recovery degree and water cut, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as rapid formation pressure drop, lack of versatility, and weak fluid flow capacity in low-permeability reservoirs

Active Publication Date: 2016-12-07
PETROCHINA CO LTD
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Problems solved by technology

However, with the improvement of exploration degree, low-permeability reservoirs will be the main target of reservoir exploration and development in my country. Reservoir fluid flow capacity is weak, formation pressure drops rapidly, water breaks out quickly, and the water cut is high at the initial stage of reservoir development. The water cut of low permeability reservoirs is often much higher than the actual, which has certain limitations
In addition, the transformation of Tong's expression is obtained by modifying the constants in Tong's expression, which lacks versatility

Method used

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  • Oil reservoir water content and oil recovery percentage relation determining method and device
  • Oil reservoir water content and oil recovery percentage relation determining method and device
  • Oil reservoir water content and oil recovery percentage relation determining method and device

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Embodiment Construction

[0059] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0060] figure 1 It is a method flowchart of an embodiment of the method for determining the relationship between reservoir water cut and oil recovery degree provided by the present invention, as figure 1 As shown, the method may include:

[0061] S1: According to the relationship between Tong's type A water flooding characteristics, con...

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Abstract

The invention embodiment provides an oil reservoir water content and oil recovery percentage relation determining method and device; the method comprises the following steps: building an oil recovery percentage and water recovery percentage relation of a target oil reservoir according to a Tong A-type water drive characteristic relation; determining the target oil reservoir water content and oil recovery percentage relation according to the oil recovery percentage and water recovery percentage relation, wherein the water content and oil recovery percentage relation comprises the water content history initial value and oil recovery percentage history initial value of the target oil reservoir. The novel method can fuse the history production data of the target oil reservoir into the oil reservoir water content and oil recovery percentage relation, thus further complying with real production conditions; the oil reservoir water content and oil recovery percentage relation determined by the method can be applied to accurately analyze low penetration oil reservoir water flooding exploitation effect, and to accurately predict oil reservoir recovery efficiency parameters.

Description

technical field [0001] The invention relates to the technical field of oil reservoir exploitation, in particular to a method and a device for determining the relationship between the water content of an oil reservoir and the degree of oil recovery. Background technique [0002] In the process of reservoir development, the relationship between reservoir water cut and oil recovery degree is the key to evaluate the effect of reservoir development. Comparing the actual curve and theoretical curve of reservoir water cut and oil recovery degree can evaluate the The law of water cut rise and development status at different development stages reflect the development potential of the reservoir. Therefore, it is very important to obtain an accurate and reliable relationship between reservoir water cut and oil recovery degree to evaluate the development degree of the reservoir. [0003] Tong’s relationship chart between water cut and oil recovery degree is a method widely used in my co...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 郝峰军傅礼兵赵伦兰君刘明慧范子菲
Owner PETROCHINA CO LTD
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