Self-emulsifying system viscosity-concentration relationship description method

A self-emulsifying and systematic technology, applied in the direction of design optimization/simulation, instrumentation, informatics, etc., to achieve the effect of improving the effect, describing the science, and promoting the value

CN110929395AActive Publication Date: 2020-03-27CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-03-27

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Abstract

The invention relates to the field of oil and gas field development and oil reservoir recovery ratio improvement, in particular to a self-emulsifying system viscosity-concentration relationship description method. The description method comprises the following steps: acquiring test data; solving a viscosity parameter by utilizing least square method regression; and establishing a description modelof the relationship between the viscosity of the self-emulsifying system and the saturation of the underground residual oil according to the obtained viscosity parameters. According to the method, self-emulsifying concentration and influence parameters of underground residual oil saturation on water-phase viscosity are introduced according to a basic seepage law of combination flooding, a mathematical model for describing self-emulsifying flooding viscosity is established, and a method for describing influence of underground residual oil saturation on viscosity of a self-emulsifying system isprovided. According to the method, the viscosity change of the self-emulsifying system under different oil saturation conditions can be described more accurately and reasonably, so that the effect ofimproving the recovery ratio is accurately predicted.
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Description

technical field

[0001] The invention relates to the field of improving oil recovery in oil and gas field development, in particular to a method for describing the viscosity-concentration relationship of a self-emulsifying system. Background technique

[0002] As the main oilfields in the Shengli Oilfield gradually enter the stage of ultra-high water cut, chemical flooding technology has become one of the leading technologies for greatly improving oil recovery in mature oilfields. Class I and II high-quality chemical flooding resources have been fully exploited, and chemical flooding resource positions are gradually shifting to high-temperature and high-salt reservoirs, post-polymer flooding reservoirs, medium-low permeability reservoirs and offshore reservoirs, and the requirements for chemical flooding systems are also increasing. High, the difficulty of tackling key problems increases. After chemical flooding resource investigation and potential evaluation, the existing V...

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Embodiment Construction

[0029] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. 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 invention belongs.

[0030] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. 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 and / or combinations thereof.

[0031] In order to enable those skilled in the art to understand the technical solution of the present invention more clearly, the technical solution of th...