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A Calculation Method of Gas Reservoir Dynamic Reserves

A technology of dynamic reserves and calculation methods, applied in the direction of earthwork drilling and production, wellbore/well components, etc., can solve problems such as lack of data, harsh use conditions, complex analysis process, etc., to overcome harsh use conditions, and the calculation process is simple and convenient Accurately Calculated Effects

Active Publication Date: 2021-05-28
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] The present invention aims at problems such as lack of data, harsh conditions of use, or complicated analysis process in existing gas reservoir dynamic reserve calculation methods. Based on the advantages of the material balance method, combined with the gas seepage process, the vertical pipe flow model, the gas well productivity equation and the material balance equation are integrated. Propose a Calculation Method for Gas Reservoir Dynamic Reserves

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  • A Calculation Method of Gas Reservoir Dynamic Reserves
  • A Calculation Method of Gas Reservoir Dynamic Reserves
  • A Calculation Method of Gas Reservoir Dynamic Reserves

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Embodiment Construction

[0050] A method for calculating dynamic reserves of a gas reservoir, the method comprising the following steps:

[0051] S1. Prepare production dynamic data: obtain gas well production dynamic data, the gas well production dynamic data includes gas well daily gas production, wellhead pressure and wellhead temperature, for the needs of vertical pipe flow model calculation, eliminate production dynamic data during well shut-in period, and The gas wells whose daily production time is less than 24 hours are converted into 24-hour daily gas production to ensure the accuracy of the calculation results.

[0052] S2. Calculating the bottomhole flow pressure: according to the compiled gas well production dynamic data, select the appropriate vertical pipe flow equation to calculate the bottomhole flow pressure of the gas well;

[0053] In this embodiment, the calculation method of the bottom hole pressure is as follows:

[0054] The vertical pipe flow model is selected to calculate the...

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Abstract

The present invention aims at problems such as lack of data, harsh operating conditions or complex analysis process in the existing gas reservoir dynamic reserve calculation method, based on the advantages of the material balance method, combined with the gas seepage process, the vertical pipe flow model, the gas well productivity equation and the material balance equation are integrated , discloses a method for calculating dynamic reserves of gas reservoirs. The method includes the following steps: S1, preparing production dynamic data; S2, calculating the bottom hole flow pressure: calculating the gas well bottom hole flow pressure according to the sorted gas well production dynamic data; S3, calculating formation static pressure: using the gas well binomial productivity equation, Calculate the average formation pressure of the gas well; S4, divide the flow stage: determine the boundary control flow stage, the unstable flow stage, and the transition stage; S5, calculate the dynamic reserves: calculate the dynamic reserves after the end of the unstable flow stage of the gas well, and the The cumulative gas production is added to obtain the real dynamic reserves of the gas well.

Description

technical field [0001] The invention relates to a method for calculating the dynamic reserves of a gas reservoir, in particular to a method for calculating the dynamic reserves of a gas reservoir. Background technique [0002] The dynamic reserves of a gas reservoir refer to the total gas volume participating in the flow in the reservoir. Accurate calculation of gas reservoir dynamic reserves is an important prerequisite for correctly evaluating gas reservoir development effects, accurately predicting gas reservoir development performance, and making a good gas reservoir development plan. At present, the methods for calculating the dynamic reserves of gas reservoirs mainly include material balance method (pressure drop method), flowing material balance method and production instability analysis method, etc. The material balance method is the most accurate and reliable method for calculating the dynamic reserves of gas reservoirs, but it requires regular and long-term shut-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 李继强胡世莱杨棽垚姜楠袁迎中黄小亮
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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