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Method for realizing variable filtrational resistance oil displacement

A technology for seepage resistance and oil displacement, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc. question

Inactive Publication Date: 2016-05-04
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for realizing variable seepage resistance flooding, which is used to solve the problem that the existing variable seepage resistance flooding technology cannot realize the displacement front approaching parallel advancement, and cannot greatly increase the ultimate recovery factor

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  • Method for realizing variable filtrational resistance oil displacement
  • Method for realizing variable filtrational resistance oil displacement
  • Method for realizing variable filtrational resistance oil displacement

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Embodiment Construction

[0083] The present invention will be further explained below in conjunction with the drawings:

[0084] The method to achieve variable seepage resistance flooding is as follows:

[0085] 1. The core used is the actual three-layer heterogeneous natural core of an oil field, and the reservoir structure parameters of different permeability layers are tested; the scanning machine used in this section is the image processing and analysis system of the GELightSpeedPlusCT machine, which is scanned by the core It consists of gantry, detector, X-ray source, data acquisition and image processing. The main frequency of the computer of the scanning system is 2*3.2GHz, the memory is 2GB, and it provides DICOM3.0 standard interface, high-speed network transmission data, and the transmission data is 10 frames / s, the computer uses Linux operating system.

[0086] (1) According to the heterogeneity of the actual natural core, the permeability of each layer of the actual reservoir is determined to be...

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Abstract

The invention relates to a method for realizing variable filtrational resistance oil displacement. The method for realizing variable filtrational resistance oil displacement comprises: 1, aimed at a reservoir whose actual reservoir is longitudinal heterogeneous, testing reservoir structure parameters of different permeable reservoirs; 2, combined with the fracture pressure, injection pressure, and pressure gradient of the actual reservoir, performing boosting matching monitoring experiments of different injection systems in different pore throat conditions, evaluating injection ability of different injection systems; 3, determining the type of the injection system and injection sequence required by variable filtrational resistance oil displacement; 4, and performing variable filtrational resistance oil displacement and evaluating effect. The method can test the positions of displacement fronts of different displacing agent systems in different permeable reservoirs, and provides reference for design of a variable filtrational resistance oil displacement scheme, so as to realize variable filtrational resistance oil displacement. Above all, the displacement front is approximate to parallel development is realized, so as to greatly improve final ultimate recovery factor.

Description

Technical field [0001] The invention relates to the technical field of crude oil recovery, in particular to a method for realizing variable percolation resistance flooding. Background technique [0002] At present, most of the main blocks of my country’s oilfields have entered the stage of high water cut. Although chemical flooding methods such as polymer flooding and ASP flooding have been used in some blocks, they still face the serious problem of how to further improve oil recovery. . According to statistics, the average water cut in oil well production in my country has reached 80%, and some old oilfields in the eastern region have water cuts of more than 90%. The remaining oil in the high water cut period is extremely dispersed. It is becoming increasingly difficult to increase reserves and production, stabilize oil and control water. . The main features are: ① High degree of exploration and development, new reserves are increasingly difficult, and remaining reserves are poo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
CPCE21B43/16
Inventor 宋考平刘丽皮彦夫刘英杰孙宁龚亚
Owner NORTHEAST GASOLINEEUM UNIV
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