Prediction method for enhanced recovery efficiency of three-component combinational oil flooding system

A ternary compounding and forecasting method technology, applied in forecasting, special data processing applications, instruments, etc., can solve the problem of no longer satisfying the linear relationship, and achieve the effect of simplifying the calculation process, good fitting situation, and improving calculation accuracy

Inactive Publication Date: 2018-09-04
PETROCHINA CO LTD
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Problems solved by technology

[0014] After polymer flooding or three-way flooding takes effect p ~N p The linear relationship is established, and in the subsequent water flooding stage W p ~N p The curve will warp up and no longer satisfy the linear relationship

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  • Prediction method for enhanced recovery efficiency of three-component combinational oil flooding system
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  • Prediction method for enhanced recovery efficiency of three-component combinational oil flooding system

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[0047] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0048] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0049] As introduced in the background technology, there are shortcomings in the prior art that the EOR value ca...

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Abstract

The invention discloses a prediction method for enhanced recovery efficiency of a three-component combinational oil flooding system. The method solves the problem of incapability of calculating an enhanced recovery efficiency value or a relatively large error in a prediction method for the recovery efficiency by the three-component combinational oil flooding system in the prior art, and has the effects of accurately predicting an oil increment of the three-component combinational oil flooding system and performing calculation to obtain the enhanced recovery efficiency value. According to the technical scheme, the method comprises the following steps of defining a moisture content depression cone, and building a moisture content model; building a polymer flooding oil increment curve quantitative representation model; calculating the enhanced recovery efficiency value by utilizing a difference value among fitted water flooding moisture content, continuous polymer flooding moisture content and actual moisture content; and performing verification by utilizing a numerical simulation method.

Description

technical field [0001] The invention relates to a method for predicting the recovery rate of chemical flooding, in particular to a method for predicting the recovery rate of a three-element compound flooding system. Background technique [0002] At present, there are four main methods of tertiary oil recovery in the world, namely chemical flooding, gas flooding, thermal flooding and microbial oil recovery. Compared with the four major technology series of tertiary oil recovery, chemical flooding is an economical and efficient enhanced oil recovery technology, while ASP flooding is a new tertiary oil recovery technology that stands out from chemical flooding, and it is my country's tertiary oil recovery improvement. The main direction of research on recovery factor. The ASP flooding technology was produced in the early 1980s and was developed on the basis of the binary composite flooding. It refers to adding a compound of alkali (A), surfactant (S) and polymer (P) to the inje...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/04
CPCG06Q10/04G06F30/20
Inventor 程宏杰刘文涛张菁吕建荣张德富谭龙朱桂芳刘宝珍
Owner PETROCHINA CO LTD
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