A Method for Determining the Well Control Radius of Gas Wells in the Early Production Stage of Carbonate Gas Reservoirs

Abstract

The invention discloses a method for determining the well control radius of a gas well in the early stage of carbonate gas reservoir production. The determination method uses the geological parameters and dynamic parameters obtained from well logging data and oil test data, and first uses logistic regression to Various types of production wells are quantified and classified, and then the same set of parameters is used to regress the well control radius of different types of production wells using the multiple linear regression method, so as to obtain the well control radius of gas wells in the early production stage of carbonate gas reservoirs. The present invention adopts a small amount of readily available geological parameters and dynamic parameters through classification evaluation and multiple regression methods to solve the shortcomings of large differences in the well control radius of different types of gas wells in carbonate gas reservoirs and the inability to quantitatively evaluate the well control radius of gas wells in the early stage of production. Demonstrating reasonable certainty in developed reserves (PDP) assessment and well pattern deployment provides an important basis.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir development, in particular to a method for determining the well control radius of a gas well in the early stage of carbonate gas reservoir production. Background technique [0002] It is proved that the evaluation of developed reserves (PDP) is an important work in the process of oilfield development, and the well control radius is the key parameter to evaluate PDP reserves by the volumetric method. Quantitative evaluation of the well control radius of gas wells in the early stage of production can improve the accuracy of PDP reserves. At the same time, the quantitative evaluation of the well control radius of production wells in the early stage of production can provide a certain basis for subsequent well pattern deployment. At present, the well control radius evaluation of production wells in oil and gas fields is mainly divided into two categories: qualitative evaluation and quant...

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Problems solved by technology

However, due to complex factors controlling the development of carbonate oil and gas reservoirs, strong heterogeneity, and various reservoir types, the well control radius of different types of development wells varies greatly. The actual well control radius of the well varies greatly

[0004] The second type of quantitative evaluation mainly includes dynamic reserve inverse algorithm and production dynamic analysis method. The dynamic reserve inverse algorithm needs relatively complete geological and engineering parameters, long production time, and relatively stable production system to quantitatively evaluate the well control radius. The wells in the initial stage of production do not have complete production performance data, which is obviously not applicable to the production wells in the early stage of development; the production performance analysis method is more complicated, and requires more dynamic and static data, which is not available for oil and gas wells in the early stage of development. above conditions

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