Overall profile control and water plugging decision-making method for water-flooding oil field

A technology for profile control and water shutoff, decision-making method, applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc.

Active Publication Date: 2014-03-12
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] However, RE decision-making technology is based on static data and only reflects the static state of the reservoir, while PI decision-making technology is based on dynamic data and only reflects production dynamics, and is only applicable to profile control wells

Method used

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  • Overall profile control and water plugging decision-making method for water-flooding oil field
  • Overall profile control and water plugging decision-making method for water-flooding oil field
  • Overall profile control and water plugging decision-making method for water-flooding oil field

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specific Embodiment

[0116] Utilize the specific embodiment of the present invention as follows:

[0117] The W formation in the Z oilfield belongs to the stage of high water cut. At present, the comprehensive water cut of this formation is relatively high, and the overall profile control and water shutoff are required for this formation. Utilize the method of the present invention to make a decision on the profile control and water shutoff measures of the layer, the specific steps are as follows:

[0118] (1) Decision parameter calculation

[0119] 1) Plane heterogeneity decision coefficient (A) calculation

[0120] Select the part with relatively high water content for application, the choice of the decision-making part of the dimension constitution layer is as follows figure 2 as shown, figure 2 The place where the color is darker is the part with higher water content.

[0121] According to three parameter technical formulas and corresponding parameters (formula (4), (6), (9)) in the meth...

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Abstract

The invention provides an overall profile control and water plugging decision-making method for a water-flooding oil field, and belongs to the field of reservoir engineering. According to the method, six parameters, namely, a plane heterogeneity decision-making coefficient A, a plane heterogeneity coefficient range RA, a longitudinal permeability variation coefficient Vk, a longitudinal permeability variation coefficient RV, an injection profile decision-making coefficient SP and an injection profile decision-making coefficient range RSP, are obtained through reservoir basic parameters, reservoir development data and reservoir production data, and then the overall profile control and water plugging decision of the water-flooding oil field can be made through the six parameters according to the criteria. The method is mainly used for oil fields which lack correlation technique data, and is especially used under the condition that due to the fact that overseas oil fields and offshore oil fields are limited by development policies and engineering characteristics, some data can not be completely collected. According to the method, the decision can be made according to essential data and the parameters.

Description

technical field [0001] The invention belongs to the field of oil reservoir engineering, and in particular relates to a decision-making method for overall profile control and water shutoff in a water injection development oilfield. Background technique [0002] In the process of water flooding development of complex oilfields, due to the heterogeneity of the reservoir, with the deepening of water flooding development, the injected water rushes along the high permeability layer, causing the contradiction between layers and planes of the reservoir to gradually intensify, and the development effect becomes poor , the rising rate of water cut in the reservoir is accelerated, the water drive reserves and water drive recoverable reserves are reduced, and the water drive recovery rate is reduced, which seriously affects the overall economic benefits of the oilfield. Therefore, the implementation of injection well profile control and oil well water plugging in high water cut period i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22
Inventor 景艳刘红谭学群张俊法
Owner CHINA PETROLEUM & CHEM CORP
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