A method for solving the evaluation parameter weight of an oil-containing gas region

Abstract

The invention discloses a method for solving the evaluation parameter weight of an oil-containing gas region. The method comprises the steps of (1) dividing zone evaluation units, determining the boundaries of the evaluation units, (2) determining the parameter characteristic values of the reservoir forming conditions of the evaluation units, mainly including hydrocarbon source rock conditions, migration conditions, reservoir conditions, trap conditions and storage conditions; (3) obtaining evaluation parameter scores of the reservoir forming conditions by adopting an assignment method according to the evaluation criteria of the evaluation parameters of the reference zone; 4) calculating the accumulation coefficient Q of the evaluation unit; 5) taking the reservoir forming condition coefficient as a constraint to obtain the weight of the evaluation parameter of the oil-gas-containing zone, and 6) performing comprehensive evaluation: multiplying the score value of each reservoir formingcondition of the evaluation unit by the weight of the corresponding parameter of the oil-gas-containing zone, then performing accumulation to obtain the total score value Z of the evaluation unit, performing sorting, and taking the evaluation unit in front of the sorting as a favorable optimization target. According to the method, the parameter weight can be objectively determined under the constraint of the regional geological background, so that the oil-gas-containing zone can be reasonably evaluated, and a favorable exploration target can be found.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration, and in particular relates to a method for obtaining the weight of evaluation parameters of oil and gas zones. Background technique [0002] The evaluation of oil and gas plays is the focus of oil and gas exploration, which is related to the increase of oilfield reserves and long-term development. Therefore, it is of great significance to effectively evaluate oil and gas plays. At present, the main problem in the evaluation of oil and gas plays is the lack of objectivity in 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 purely mathematical calculations are used, this method uses data algorithms such as correlation analysis or gray theory to achieve quantification of weight calculati...

AI Technical Summary

Problems solved by technology

At present, the main problem in the evaluation of oil and gas plays is the lack of objectivity in 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 purely mathematical calculations are used, this method uses data algorithms such as correlation analysis or gray theory to achieve quantification of weight calculations, but is greatly affected by parameter values, and often occurs under similar geological conditions. The problem of excessive parameter weight deviation

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