Multi-objective optimization method for reasonable well spacing in ultra-deep reef-shoal gas reservoirs

Abstract

The invention relates to a multi-objective optimization method for reasonable well spacing of ultra-deep reef-shoal gas reservoirs, relates to the technical field of oil and gas reservoir development, and is used to solve problems in the prior art that the optimal development well pattern does not comprehensively consider the maximization of economic benefits, production Technical issues of yield maximization and multiple objectives with a certain stable production period. The method of the present invention includes the steps of establishing a multi-objective function for reasonable well spacing of reef-shoal gas reservoirs; the steps of establishing a constraint function and the step of solving the multi-objective function according to the constraint function; and solving the multi-objective function by establishing the constraint function , the value of the multi-objective function corresponding to the optimal and reasonable well spacing obtained can satisfy the maximum profit, the maximum recovery rate and the maximum stable production period at the same time, so the optimal and reasonable well spacing can provide valuable guidance for oilfield exploration , so as to obtain good social and economic benefits.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, in particular to a multi-objective optimization method for reasonable well spacing in ultra-deep reef-shoal facies gas reservoirs. Background technique [0002] At present, there are many techniques for determining reasonable well spacing, such as single well productivity method, reasonable gas production rate method, dynamic prediction method, and well-controlled reserve inversion method, but these methods have not been determined on the basis of considering the joint influence of various factors Reasonable well spacing, so the obtained reasonable well spacing is not the optimal solution, and cannot provide valuable guidance for oil and gas exploration. [0003] In the exploration of reef-shoal facies in ultra-deep layers (that is, the buried depth of the target layer is greater than 6000m), people hope that the optimal development well pattern can meet the three goals ...

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Problems solved by technology

[0004] The present invention provides a multi-objective optimization method for reasonable well spacing of ultra-deep reef-shoal gas reservoirs with different acquisition parameters, which is used to solve the problem in the prior art that the optimal development well pattern does not comprehensively consider the maximization of economic benefits and recovery rate and technical issues with multiple goals with a certain stable production period

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