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Recoverable gas reserve prediction method applied to low-permeability gas reservoirs and gas wells

A prediction method and low-permeability technology, applied in data processing applications, special data processing applications, earthwork drilling and production, etc., can solve the problems of difficult selection of high-yield construction sites, difficult prediction of recoverable gas volume, and harsh prediction conditions of traditional methods. Facilitate risk assessment, save time, and quickly and accurately predict the effect

Active Publication Date: 2021-02-12
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of difficult prediction of recoverable gas volume, difficult selection of high-yield construction sites, and harsh prediction conditions of traditional methods in new low-permeability gas wells or new gas reservoirs, and proposes a method for low-permeability gas reservoirs and gas wells. The recoverable gas volume prediction method can quickly and accurately calculate the recoverable gas volume of a gas well or gas reservoir under any formation pressure, and can also calculate the recoverable gas volume of a gas well or gas reservoir under pressure in the final abandoned formation

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  • Recoverable gas reserve prediction method applied to low-permeability gas reservoirs and gas wells
  • Recoverable gas reserve prediction method applied to low-permeability gas reservoirs and gas wells
  • Recoverable gas reserve prediction method applied to low-permeability gas reservoirs and gas wells

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Embodiment Construction

[0038] Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that the implementations shown and described in the drawings are only exemplary, intended to explain the principle and spirit of the present invention, rather than limit the scope of the present invention.

[0039] Embodiments of the present invention provide a method for predicting recoverable gas volume applied to low-permeability gas reservoirs and gas wells, such as figure 1 As shown, the following steps S1-S7 are included:

[0040] S1. Collect the physical parameters and production performance data of the target low-permeability gas reservoir and similar low-permeability gas reservoirs.

[0041] In the embodiment of the present invention, the physical parameters of the target low-permeability gas reservoir include effective reservoir permeability K (in mD) and effective reservoir thickness h (in m).

[0042] The produ...

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Abstract

The invention discloses a recoverable gas reserve prediction method applied to low-permeability gas reservoirs and gas wells. The recoverable gas reserve of a single well and the recoverable gas reserve of the whole gas reservoir can be predicted. According to the method, production performance data and physical property parameters of similar typical low-permeability gas reservoirs in China are mainly combined, a large number of statistical samples are regressed, a relational expression obtained by fitting the ratio Gp / Kh and the pressure difference delta p is used for a target low-permeability gas well or gas reservoir, and therefore the recoverable gas reserve of the target low-permeability gas well or gas reservoir is predicted. According to the method, data of four similar low-permeability gas reservoirs are collected, and a fitted recoverable gas reserve prediction formula is not only suitable for N gas reservoirs, but also suitable for other low-permeability gas reservoirs.

Description

technical field [0001] The invention belongs to the technical field of recoverable gas forecasting, and in particular relates to the design of a recoverable gas forecasting method applied to low-permeability gas reservoirs and gas wells. Background technique [0002] Recoverable gas volume refers to the cumulative gas volume that can be produced by a gas well or a gas reservoir at a certain formation pressure or when it reaches the final abandonment pressure. It reflects the production value of a gas well or gas reservoir and is an important guide for dynamic analysis and development adjustment of gas reservoirs significance. At present, the commonly used methods for calculating recoverable gas volume include pressure drop method, mathematical model method, production accumulation method, production decline method, etc. The pressure drop method requires accurate formation pressure measurement, which has high cost and harsh conditions; the mathematical model method and the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00G06F30/20G06Q50/06
CPCE21B49/00G06F30/20G06Q50/06
Inventor 黄全华李健郭平姜健丁泓竣林星宇
Owner SOUTHWEST PETROLEUM UNIV
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