Multi-objective optimization method for reasonable well spacing of ultra-deep reef flat-phase gas reservoir

Abstract

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 of an ultra-deep reef flat-phase gas reservoir. The method is used for solving the technical problem that an optimal development well pattern in the prior art does not comprehensively take maximation of economic benefits, maximizationof recovery efficiency and implementation of several targets with certain stable production periods into account. The method comprises the following steps of establishing a multi-objective function of the reasonable well spacing of the reef flat-phase gas reservoir, establishing a constraint condition function and solving the multi-objective function according to the constraint condition function. The multi-objective function is solved by establishing the constraint condition function, and the obtained value of the multi-objective function corresponding to the optimized reasonable well spacing can meet the requirements for the maximum profit, the maximum recovery efficiency and the maximum stable production period. Therefore, the optimized reasonable well spacing can provide a valuable guiding basis for oil field exploration, and correspondingly considerable social benefits and economic benefits are obtained.

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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