Complex gas reservoir drainage gas recovery process system optimization method

Abstract

The invention discloses a complex gas reservoir drainage gas recovery process system optimization method, which comprises the following technical measures: step 1, on the basis of gas well data of a drainage gas recovery process developed in a region, obtaining characteristic factors influencing the gas well drainage gas recovery process by adopting a gray correlation analysis method; 2, sorting the obtained characteristic factors according to the correlation degree; 3, establishing a neural network model based on drainage gas production process effectiveness identification; 4, taking the contribution rate of the characteristic factors as a target, carrying out the successive analysis of the characteristic factors, and optimizing a neural network model; 5, removing feature factors causingincrease of the recognition error rate of the training sample; and establishing a prediction model of the regional gas reservoir drainage gas recovery process. The prediction effectiveness of the application of the drainage gas recovery process in the complex gas reservoir gas well can be reliably improved, so that the implementation success rate of the drainage gas recovery process in the complexgas reservoir gas well can be effectively guaranteed, the recovery efficiency is remarkably improved, and the maintenance cost of the gas well is effectively reduced.

Description

technical field [0001] The invention relates to drainage gas recovery technology of natural gas, in particular to an optimization method for complex gas reservoir drainage gas recovery process system. Background technique [0002] During the production of gas wells, as the formation pressure of the gas wells continues to decrease, the gas wells will produce formation water or condensate water to varying degrees. When the gas production of the gas well is greater than the critical liquid-carrying flow rate, the gas well can continuously and smoothly carry the produced water out of the wellbore relying on its own gas production, and the gas well can maintain stable production by relying on its own energy; The pressure is gradually reduced so that the gas production of the gas well is also gradually reduced. When the gas production rate of the gas well gradually decreases to less than the critical liquid-carrying flow rate, the gas production rate of the gas well itself is not...

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Problems solved by technology

[0006] The technical purpose of the present invention is to provide a complex gas reservoir drainage and gas recovery process that can effectively guarantee the success rate of implementation and significantly improve the recovery rate in view of the particularity of the above-mentioned complex gas reservoir and drainage gas recovery process and the deficiencies of the prior art System Optimization Method

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