Method, device and equipment for predicting productivity of dense water-containing gas reservoir

Abstract

The embodiment of the invention discloses a dense water-containing gas reservoir productivity prediction method, device and equipment, and the method comprises the steps: collecting geological attribute data and fracturing attribute data of a dense water-containing gas reservoir, comprehensively considering factors affecting the productivity of the dense water-containing gas reservoir, and determining evaluation indexes affecting the productivity of the dense water-containing gas reservoir; and is analyzing and determining the correlation degree between each evaluation index and the productivity by using the grey correlation main control factor weight, and then determining the influence weight value of each evaluation index on the productivity. And a productivity prediction model is trained based on the collected sample data and the calculated correlation degree, a machine learning model of the dense water-containing gas reservoir is constructed, and the productivity of the dense water-containing gas reservoir is predicted by using the constructed machine learning model, thereby realizing accurate, comprehensive and rapid productivity prediction of the dense water-containing gas reservoir.

Description

technical field [0001] This specification belongs to the technical field of oil and gas production, and in particular relates to a method, device and equipment for predicting the production capacity of tight water-bearing gas reservoirs. Background technique [0002] Tight gas refers to natural gas with reservoir porosity less than 10%, permeability less than 0.1mD, gas saturation less than 60%, and water saturation greater than 40%. Due to the characteristics of water saturation, hydraulic fracturing is often used for industrial development. With the continuous deepening of oil and gas exploration and development, tight gas has shown great potential under the existing economic and technological conditions, and global natural gas resources have ushered in a second expansion. Tight gas is characterized by high water saturation, and is often developed by hydraulic fracturing. Accurate prediction of production capacity after fracturing is an important and difficult problem for...

AI Technical Summary

Problems solved by technology

Therefore, in order to improve the development effect of tight gas, it is necessary to solve the problem that the production capacity of tight gas is difficult to predict accurately after fracturing

[0003] At present, the methods for predicting productivity after fracturing of tight gas mainly include physical simulation method and reservoir numerical simulation method. However, the physical simulation method has a long experimental cycle and high experiment cost; The scale is too large to accurately describe the characteristics of the reservoir, resulting in low prediction accuracy

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