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Quantitative identification method and system for water invasion amount of fractured edge water gas reservoir

A quantitative identification and water influx technology, applied in the direction of instruments, data processing applications, prediction, etc., can solve the problem of less research on quantitative identification of water influx, which affects the adjustment of production measures in development plans, and it is difficult to solve the problem of water in fractured edge water gas reservoirs. Intrusion identification and other issues

Active Publication Date: 2019-06-07
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

[0003] However, for a long time, most of the research work on the identification method of water influx has been carried out for single-medium gas reservoirs, and there are few studies on the quantitative identification of water influx in gas reservoirs with dual media of fractures and pores.
According to the existing methods, it is difficult to accurately identify the water influx of fractured edge water gas reservoirs, which will affect the formulation of subsequent development plans and the adjustment of production measures

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  • Quantitative identification method and system for water invasion amount of fractured edge water gas reservoir
  • Quantitative identification method and system for water invasion amount of fractured edge water gas reservoir
  • Quantitative identification method and system for water invasion amount of fractured edge water gas reservoir

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[0026] The implementation of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, so as to fully understand how the present invention applies technical means to solve technical problems and achieve the realization process of technical effects and implement them accordingly. It should be noted that, as long as there is no conflict, the various embodiments of the present invention and the various features in each embodiment can be combined with each other, and the technical solutions formed are all within the protection scope of the present invention.

[0027] In addition, the steps shown in the flowcharts of the drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical sequence is shown in the flowcharts, in some cases, they can be different Perform the steps shown or described in the order here.

[0028] Please refer to figure 1 As shown, the method for qu...

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Abstract

The invention provides a quantitative identification method and system for the water invasion amount of a fractured edge water gas reservoir, and the method comprises the steps: obtaining geological and production data, and obtaining geological parameters and production data according to the geological and production data and a water invasion amount quantitative identification algorithm; accordingto the geological parameters, the production data and a preset gas reservoir and water body radius value, calculating a water invasion amount value through a fractured edge water gas reservoir waterinvasion amount calculation formula; according to a water drive gas reservoir material balance equation and the water invasion amount value, obtaining a dynamic curve through a linear regression method, and obtaining a linear regression coefficient corresponding to the dynamic curve through calculation according to the dynamic curve; and when the linear regression coefficient is greater than a predetermined threshold, obtaining a water invasion amount identification result according to the dynamic curve, the geological parameters and the production data.

Description

Technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method and system for quantitatively identifying water influx in fractured edge water gas reservoirs. Background technique [0002] Fractured edge water water drive gas reservoirs occupy an important position in the development of gas fields in my country. For this type of gas reservoirs, the breakthrough of edge water may cause many reservoirs to be sealed by water, reduce the control area of ​​gas wells, and seriously affect gas well productivity and production. stability. When the production is lower than the critical liquid-carrying flow rate, it is likely to cause serious liquid accumulation at the bottom of the gas well and stop production. The amount of water invasion can be calculated, and certain drainage measures can be taken according to the water invasion situation to release formation gas to restore production. The calculation of water influx is a...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
Inventor 张家丽廖新维陈志明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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