A Method for Obtaining the Weights of Geological Target Evaluation Parameters

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...

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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. Uncertainty; (2) When using pure mathematical methods to calculate, this method uses data algorithms such as correlation analysis or gray theory to realize the quantification of weight calculations, but is greatly affected by parameter values ​​and mathematical methods, and often appears similar Excessive weight deviation of parameters under geological conditions

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