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A method and device for evaluating influencing factors of profile control

A technology of influencing factors and evaluation methods, applied in data processing applications, instruments, calculations, etc., can solve problems that do not have the effect of adjustment, the number of factors cannot be adjusted for different reservoirs, and the effect of profile control implementation cannot be intuitively reflected. impact, etc.

Active Publication Date: 2019-09-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The data obtained by the existing methods are given different values ​​according to different value ranges, which cannot intuitively reflect the influence of a single influencing factor on the implementation effect of profile control, and do not have the function of guiding the adjustment of a certain influencing factor. At the same time, the existing The method cannot adjust the number of factors for different reservoirs, and has certain limitations in application

Method used

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  • A method and device for evaluating influencing factors of profile control
  • A method and device for evaluating influencing factors of profile control
  • A method and device for evaluating influencing factors of profile control

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0048] This embodiment provides an evaluation method of influencing factors of profile control, such as figure 1 As shown, the method includes the following steps:

[0049] Step 101: Obtain the sensitivity analysis data of the implemented profile control wells, and obtain the actual value of each influencing factor of multiple influencing factors and the corresponding sensitivity value of each influencing factor.

[0050]In the water injection development process of oil fields, profile control refers to the operation of plugging high permeability layers from water injection wells, which can be used to adjust the water absorption profile of water injection intervals and reduce the water production of oil wells. The implemented profile control well is the water injection well that has implemented the profile control operation. The sensitivity analysis data of the implemented profile control well is obtained, and the actual value of each influencing factor and each influencing fa...

Embodiment 2

[0114] This embodiment provides an evaluation method of influencing factors of profile control, such as Figure 4 As shown, the method includes the following steps:

[0115] Step 101': Obtain the sensitivity analysis data of the profile control wells that have been implemented, and obtain the actual value of each influencing factor of multiple influencing factors and the corresponding sensitivity value of each influencing factor.

[0116] In this example, taking a low-permeability oilfield as an example, 8 influencing factors with a high degree of correlation with the implementation effect were selected for analysis, namely remaining recoverable reserves, well group production capacity, profile control rounds, water absorption profile Homogeneity, pressure drop before adjustment, water cut, pressure rise space and string condition.

[0117] Step 102': According to the sensitivity value corresponding to each influencing factor, assign the highest weight value corresponding to ...

Embodiment 3

[0163] This embodiment provides an evaluation device for influencing factors of profile control, such as Figure 7 As shown, the device includes:

[0164] The first obtaining module 201 is used to obtain the sensitivity analysis data of the profile control wells that have been implemented, and obtain the actual value of each influencing factor of multiple influencing factors and the corresponding sensitivity value of each influencing factor;

[0165] The assignment module 202 is used to assign the highest weight value corresponding to each influencing factor according to the corresponding sensitive value of each influencing factor;

[0166] Specifically, when the sensitivity value corresponding to the influence factor is greater than the first threshold, the highest weight value corresponding to the influence factor is 1.5; when the sensitivity value corresponding to the influence factor is less than or equal to the first threshold and greater than the second threshold , the ...

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Abstract

The invention discloses an evaluation method and device of influence factors of profile control, and belongs to the field of oil and gas field development technology. A mathematical model between actual values and weight values of the influence factors is established, the actual value of each influence factor in data of a to-be-studied profile control well is substituted into the model, and the weight value of each influence factor of the to-be-studied profile control well is determined; the weight value of each influence factor of the to-be-studied profile control well is normalized to obtain a score for each influence factor after normalization; and the score of each influence factor after normalization is compared. Therefore, influences of the single influence factor on an implementation effect of the profile control can be visually reflected, and then adjustment of the profile control well for the single influence factor is specifically guided.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, in particular to an evaluation method and device for influencing factors of profile control. Background technique [0002] In the process of oilfield water injection development, due to the heterogeneity of the reservoir, it is easy to cause the injected water to rush along the high permeability zone, resulting in smaller water injection swept volume and poor development effect. Profile control of oilfield reservoirs can effectively inhibit the injection water from rushing along the high-permeability zone, expand the swept volume of water injection, ease and control the interlayer, intralayer and plane heterogeneity of the reservoir, and achieve the purpose of improving the effect of water injection development. By evaluating the influencing factors of profile control, it is beneficial to control the development process of profile control and make the development accuracy of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/00G06Q50/02
Inventor 宋阳坤熊英王啊丽许红恩田继东段理马超邓鲁强李之燕林云
Owner PETROCHINA CO LTD