Method for Evaluating the Effect of Drainage Construction Based on Deviation Maximization Approach

Abstract

Drainage gas recovery technologies are primarily utilized to control the effusion in the gas well bore and maintain the gas well's regular production. The primary evaluation method for the application effect of the drainage gas production process is the production parameter evaluation after construction. However, the evaluation index system lacks a reasonable drainage gas production construction effect evaluation index system. To address this gap, this paper examines the principles and characteristics of six common drainage and gas production processes and analyzes the evaluation construction effect in detail from four perspectives, including object, process, data, and goal. Six basic principles for the construction of the index system are established. Based on grounded theory and deviation maximization approach, this paper proposes 30 effect evaluation indicators, including four categories of production layer status, process requirements, downhole conditions, and equipment status, and statistical independence and significance indicators are screened. The factor analysis method is used to test the rationality of the construction effect evaluation indicators, and the contribution rate of selected indicator information is found to be greater than 90%, indicating that the constructed drainage and gas production construction effect evaluation indicator system is reasonable.