Prediction method and device for reserves and water invasion of water-drive gas reservoir

A technology of water intrusion and water driving gas, applied in the direction of prediction, instrumentation, complex mathematical operations, etc., can solve the problems of failure to test and little difference in fitting accuracy, and achieve high reliability and accurate prediction results

Active Publication Date: 2020-08-07
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

Most of the methods that can simultaneously calculate the water influx and reserves of water drive gas reservoirs are to add the conventional water influx calculation method to the material balance equation of water drive gas reservoirs, and then assume the water body first and conduct trial calculation

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  • Prediction method and device for reserves and water invasion of water-drive gas reservoir
  • Prediction method and device for reserves and water invasion of water-drive gas reservoir
  • Prediction method and device for reserves and water invasion of water-drive gas reservoir

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Embodiment Construction

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present specification in combination with the drawings in the embodiments of the present specification. Obviously, the described embodiments are only some of the embodiments of the present specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0022] For water-drive gas reservoirs, especially active water-drive gas reservoirs, water invasion can replenish energy to the gas reservoir, delay the reduction of formation pressure and gas well production, until the water cone breaks through and water breakthrough occurs in production, which directly affects the gas production. Tibetan recovery rate. During the exploitation of natural water drive gas reservoirs, as the cumulative gas production i...

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Abstract

The embodiment of the invention provides a prediction method and device for reserves and water invasion of a water-drive gas reservoir. The method comprises the following steps: acquiring reservoir physical property parameters of a gas reservoir and production dynamic data of the gas reservoir; determining the substance balance equation of the gas reservoir based on the elastic expansion effect ofbound water and rock particles, and establishing a first linear regression model; establishing a second linear regression model according to the material balance equation and the first linear regression model; and predicting the reserves and the water invasion amount of the gas reservoir according to the reservoir physical property parameters, the production dynamic data, the first linear regression model and the second linear regression model, thereby improving the prediction efficiency and accuracy of the reserves and the water invasion amount.

Description

technical field [0001] The embodiments of this specification relate to the field of gas reservoir development, and in particular to a method and device for predicting reserves and water influx of water drive gas reservoirs. Background technique [0002] With the improvement of exploration technology, more and more abnormally high-pressure gas reservoirs have been discovered. Accurately estimating the reserves and water influx of abnormally high-pressure gas reservoirs plays an extremely important role in analyzing and predicting gas reservoir dynamics and gas reservoir development planning. Common methods for estimating gas reservoir reserves mainly include: material balance method, well testing method, volumetric method and empirical algorithm. The accuracy of the volumetric method is closely related to the accuracy of the geological data. With the abundance of geological data, the accuracy of the volumetric method is getting higher and higher, but the acquisition of geolo...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/02G06F17/11G06F17/18
CPCG06Q10/04G06Q50/02G06F17/11G06F17/18Y02A10/40
Inventor 石军太鲁家国房烨欣吴嘉仪贾焰然李星浩徐涛石浩田刘熙
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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