Horizontal well profile control effect evaluation method based on fuzzy comprehensive evaluation and analytic hierarchy process

A technology of fuzzy comprehensive evaluation and analytic hierarchy process, applied in the field of water plugging and profile control of horizontal wells, which can solve the problems of not forming evaluation process and evaluation standards, fuzzy comprehensive evaluation and analytic hierarchy process, etc.

Inactive Publication Date: 2021-06-08
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

However, the evaluation of the effect of water plugging and profile control of horizontal wells in current oilfields rarely combines fuzzy

Method used

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  • Horizontal well profile control effect evaluation method based on fuzzy comprehensive evaluation and analytic hierarchy process
  • Horizontal well profile control effect evaluation method based on fuzzy comprehensive evaluation and analytic hierarchy process
  • Horizontal well profile control effect evaluation method based on fuzzy comprehensive evaluation and analytic hierarchy process

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Embodiment

[0063] In a preferred embodiment of the present invention, taking the XX horizontal well in the X area of ​​Changqing Oilfield as an example, the method for evaluating the profile control effect of the horizontal well based on fuzzy comprehensive evaluation and AHP includes the following steps:

[0064] Step 1: Select injection pressure, water absorption index, slope of Hall curve, variation coefficient of water well profile control and homogeneity coefficient of water absorption profile as the evaluation index composition factor set of horizontal well water plugging and profile control effect, and divide the evaluation results into The four grades of good effect, good effect, general effect and no effect constitute the comment set;

[0065] Step 1.1: According to the actual situation of the site, the evaluation indexes of water plugging and profile control of horizontal wells with more applications and more complete data are selected, such as injection pressure, water absorpti...

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Abstract

The invention discloses a horizontal well profile control effect evaluation method based on fuzzy comprehensive evaluation and analytic hierarchy process, and belongs to the field of horizontal well water shutoff and profile control. Injection pressure, a water absorption index, a Hall curve slope, a water well profile control variable coefficient and a water absorption profile homogeneity coefficient are selected as a factor set of horizontal well water shutoff and profile control effect evaluation indexes, and the evaluation results are divided into four grades of good effectiveness, relatively good effectiveness, general effectiveness and no effectiveness to form a comment set. The method also includes calculating the membership degree of each factor in the factor set to the evaluation result according to the membership function, and constructing an evaluation matrix; analyzing the weight occupied by each factor in the judgment result by using an analytic hierarchy process to obtain a weight set; and based on a weighted average model, obtaining a membership degree of the evaluation result to the evaluation grade, and determining a final comprehensive evaluation grade according to a maximum membership degree principle. The invention solves the problems that an existing horizontal well water shutoff and profile control evaluation method is diversified in result and poor in comprehensiveness.

Description

technical field [0001] The invention belongs to the field of water plugging and profile control of horizontal wells, and relates to a method for evaluating the effect of profile control of horizontal wells based on fuzzy comprehensive evaluation and hierarchical analysis. Background technique [0002] The chemical water plugging and profile control technology is an important means to improve the heterogeneity of the reservoir, improve the sweep efficiency of injected water, thereby enhancing the water injection development effect of the oilfield and improving the oil recovery rate of the oilfield. However, at present, the effectiveness of chemical water plugging and profile control in horizontal wells is generally judged based on experience, or only rely on a certain index such as injected water distribution ratio or water absorption index for analysis and evaluation. The comparative changes before and after chemical water plugging and profile control in Hira wells are relat...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G06N7/02
CPCG06Q10/06393G06Q50/06G06N7/02
Inventor 贾虎黎棚武张瑞周政君吕伟
Owner SOUTHWEST PETROLEUM UNIV
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