A Method for Obtaining the Weights of Geological Target Evaluation Parameters

A technology for evaluating parameters and targets, applied in the field of oil and gas exploration, can solve problems such as large influence, uncertainty, and strong subjectivity, and achieve the effect of optimizing exploration targets and overcoming direct intervention

Active Publication Date: 2022-07-22
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

At present, the main problem in the quantitative evaluation of favorable targets is that there is no reasonable basis for determining the weight of evaluation parameters, which is mainly manifested in: (1) When using the expert scoring method, the defect is that it is highly subjective and relies too much on the experience and level of geological personnel. ...

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  • A Method for Obtaining the Weights of Geological Target Evaluation Parameters
  • A Method for Obtaining the Weights of Geological Target Evaluation Parameters
  • A Method for Obtaining the Weights of Geological Target Evaluation Parameters

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Embodiment 1

[0147] like image 3 As shown, taking a block in the central uplift belt of the Tarim Basin as an example, the evaluation of favorable Ordovician targets was carried out. 11 evaluation objectives are drawn up, represented by serial numbers, and the typical parameters of the objective units are selected to carry out comprehensive evaluation.

[0148] S1, read the parameter characteristic value of the target evaluation unit

[0149] (1) Reference Figure 4 and Figure 5 , and read parameter values ​​such as the distribution thickness of the source rock, the hydrocarbon supply area coefficient and the hydrocarbon supply condition in each evaluation target area, as the basis for the evaluation of the source rock condition.

[0150] (2) Reference Image 6 , Figure 7 , and read the sedimentary facies types and distances from faults of different evaluation targets as the basis for evaluating reservoir conditions.

[0151] (3) Reference Figure 7 , read the fault development d...

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Abstract

The invention discloses a new method for obtaining the weight of geological target evaluation parameters, which includes the following steps: S1: determining the parameter characteristic value of the geological target evaluation; S2: determining the expert weight of the evaluation parameter, and obtaining an expert experience scoring table; S3: constructing Parameter evaluation matrix; S4: Construct expert constraints to determine the mother sequence of grey relational matrix; S5: Construct parameter evaluation matrix under expert constraints; S6: Normalization of grey relational analysis evaluation index parameters; S7: Calculate grey relational degree coefficient ; S8: Calculate the grey relational degree; S9: Obtain the weight of the target evaluation parameter; S10: Target evaluation. The constraints of the evaluation parameters are constructed by using the expert experience value, and then the parameter matrix under the constraints of the experts is established, and the weights of the parameters are obtained. The method can objectively determine the parameter weights under the constraints of regional geological background, overcome the direct intervention of human beings in the previous methods, and then evaluate favorable targets reasonably and effectively, and realize the optimization of favorable exploration targets.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration, in particular to a method for obtaining the weight of geological target evaluation parameters. Background technique [0002] Quantitative evaluation of favorable targets is an important part of oil and gas exploration, which is related to the selection of geological targets and the smooth development of exploration and development. Therefore, it is of great significance to effectively improve the results of quantitative evaluation. At present, the main problem in the quantitative evaluation of favorable targets is that there is no reasonable basis for determining the weight of evaluation parameters, which is mainly manifested in: (1) When the expert scoring method is used, the defect is that it is highly subjective and relies too much on the experience and level of geologists. (2) When pure mathematical method is used for calculation, this method uses data algorithms such as corre...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06F17/18G06F17/16
CPCG06Q10/06393G06F17/18G06F17/16
Inventor 李斌赵星星张鑫梁宇吉鑫付修根张欣玥
Owner SOUTHWEST PETROLEUM UNIV
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