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A method for identifying the dynamic correlation degree of chemical flooding injection and production wells

A technology of dynamic association and identification method, which is applied in informatics, mining fluid, earthwork drilling and mining, etc. It can solve the problems of complex technology, long time-consuming, high cost, etc., and achieve the effect of simple data acquisition, wide application and simple operation

Active Publication Date: 2017-04-05
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are costly, difficult to obtain data, complex in technology, and time-consuming, seriously affecting the normal production of oilfields

Method used

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  • A method for identifying the dynamic correlation degree of chemical flooding injection and production wells
  • A method for identifying the dynamic correlation degree of chemical flooding injection and production wells
  • A method for identifying the dynamic correlation degree of chemical flooding injection and production wells

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Experimental program
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Embodiment

[0049] A method for identifying the dynamic correlation degree of chemical flooding injection and production wells, the specific steps include:

[0050] (1) During the time period T from the injection of the chemical agent to the start of the test, the time period T is divided into the same time interval t, and the actual value of the injection concentration of the chemical agent in the injection well and the concentration of each production well in the well group are recorded at the same time at each time interval t. The actual value of chemical agent output concentration; the time period T is from September 2003 to November 2011, t is 1 month, there are 2 injection wells and 7 production wells;

[0051] (2) According to the dynamic correlation equation between the actual value of the chemical agent injection concentration of the injection well recorded in step (1) and the calculated value of the chemical agent output concentration of each production well in the well group, th...

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Abstract

A method for identifying the dynamic correlation degree of chemical flooding injection and production wells, comprising: (1) within the time period T from injection of chemical agents to the start of testing, simultaneously record the actual value of the injection concentration of the chemical agent in the injection well at intervals t and The actual value of the chemical agent output concentration of each production well; (2) According to the dynamic correlation equation between the actual value of the chemical agent injection concentration and the calculated value of the chemical agent output concentration of each production well, the actual chemical agent production concentration of each production well is fitted. (3) Draw the dynamic correlation diagram between chemical flooding wells; (4) Calculate the variation coefficient of the dynamic correlation index to determine the dynamic correlation index of the chemical flooding wells between dynamic association types. The invention makes full use of the dynamic information of the injection and production wells in the oil field, has simple data acquisition, simple operation, and wide application range. It is used to identify the channeling of the chemical agent solution in the formation, guide the injection and production wells of chemical flooding to allocate production and injection, profile control and plugging Water, etc. provide the basis.

Description

technical field [0001] The invention relates to a method for identifying the dynamic correlation degree of chemical flooding injection and production wells, and belongs to the technical field of oil recovery in oilfields. Background technique [0002] Chemical flooding is an important method to enhance oil recovery in my country. Injecting chemical agent solutions such as polymers can improve reservoir heterogeneity to a certain extent, but the chemical agent solution will still break through along the high permeability bands in the formation. Reduce displacement efficiency. According to the injection-production performance of the injection and production wells in the block, the dynamic correlation degree between wells is calculated, and the channeling of the chemical flooding solution in the ground is identified. important meaning. [0003] At present, the commonly used research methods of dynamic correlation between injection and production wells mainly include pressure t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22
CPCE21B43/16G16Z99/00
Inventor 侯健刘永革杜庆军李淑霞雷仲庆陆努于波周康李晓宁
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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