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A Rapid Productivity Prediction Method for Low Permeability Gas Reservoirs

A forecasting method and low-penetration technology, applied in forecasting, data processing applications, instruments, etc., to achieve the effect of high forecast applicability, high result accuracy, and fast speed

Active Publication Date: 2022-04-29
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of productivity prediction of oil and gas fields, and propose a method for fast prediction of productivity of low-permeability gas reservoirs

Method used

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  • A Rapid Productivity Prediction Method for Low Permeability Gas Reservoirs
  • A Rapid Productivity Prediction Method for Low Permeability Gas Reservoirs
  • A Rapid Productivity Prediction Method for Low Permeability Gas Reservoirs

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Embodiment Construction

[0046] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0047] Such as figure 1 As shown, the present invention provides a method for quickly predicting the productivity of low-permeability gas reservoirs, comprising the following steps:

[0048] S1: Obtain the relevant parameters of the production layers that have completed productivity tests in low-permeability gas fields, including the open flow Q AOF , effective thickness h and permeability K;

[0049] S2: Test the unimpeded flow Q of the production layer according to the completed production capacity AOF and the effective thickness h to calculate the open flow q per unit thickness AOF ;

[0050] S3: unimpeded flow q per unit thickness AOF Carry out fitting with the permeability K to obtain the correlation fitting relationship diagram and the correlation fitting relationship formula;

[0051] S4: According to the relevant fitting relationship diagra...

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Abstract

The invention discloses a method for quickly predicting the production capacity of low-permeability gas reservoirs, which includes obtaining relevant parameters of production layers that have been tested for production capacity, analyzing and obtaining a correlation fitting relationship diagram and a correlation fitting relationship formula; and then combining multiple similar low-permeability gas fields The production capacity prediction data is obtained from the comparison and fitting relationship diagram and the comparison and fitting relationship formula; finally, the abnormal points are deleted, and the standard fitting relationship diagram is obtained to obtain the standard fitting relationship formula, and the production capacity prediction is completed. The method for quickly predicting the production capacity of low-permeability gas reservoirs of the present invention combines the production test data of domestic similar typical low-permeability gas fields, returns a large number of statistical samples, obtains a fitting relational expression, and completes the rapid production capacity prediction. The method has high predictive applicability, fast speed and high result accuracy, and can meet the needs of on-site production.

Description

technical field [0001] The invention belongs to the technical field of production capacity prediction of oil and gas fields, and in particular relates to a method for quickly predicting production capacity of low-permeability gas reservoirs. Background technique [0002] Productivity prediction is an important part of oil and gas field development planning and deployment, development scheme design, development scheme adjustment and development dynamic analysis. Most sites use capacity testing to obtain unimpeded flow, but this method takes a long time and may fail the test. When merging gas fields abroad, it is often necessary to quickly predict production capacity to conduct risk assessment. The production capacity test cannot meet the requirements, and the error of the traditional fitting method is large. For this reason, the present invention proposes a new method of regional statistics to predict productivity, and combines the data of a number of similar gas fields to f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 黄全华李健郭平
Owner SOUTHWEST PETROLEUM UNIV
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