Method for predicting productivity of horizontal well in tight sandstone reservoir and device for predicting productivity

By dividing the horizontal wells in tight sandstone reservoirs into blocks and constructing reservoir-production correlation coefficients, the problem of insufficient production capacity prediction accuracy in existing technologies has been solved, achieving higher accuracy production capacity prediction and efficiency improvement.

CN122114246APending Publication Date: 2026-05-29PETROCHINA CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PETROCHINA CO LTD
Filing Date
2024-11-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies suffer from parameter uncertainties in predicting the productivity of horizontal wells in tight oil reservoirs, resulting in insufficient prediction accuracy and an inability to effectively and quickly predict productivity.

Method used

Tight sandstone oil reservoirs are divided into blocks based on geological parameter data, and a reservoir-production correlation coefficient is constructed. Production capacity is predicted by the relationship between stable daily oil production and exploitable geological reserves, and production is calculated using the reservoir-production correlation coefficient.

Benefits of technology

It improves the accuracy and efficiency of production capacity prediction for horizontal wells in tight sandstone reservoirs, enabling more accurate production capacity prediction and reducing extraction costs.

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Abstract

The application discloses a method and device for predicting productivity of a horizontal well in a tight sandstone oil reservoir. The method comprises the following steps: step 1), based on geological parameter data, dividing the tight sandstone oil reservoir into a plurality of blocks, each block comprising a plurality of horizontal wells that have been put into production; step 2), obtaining stable daily oil production of each horizontal well in each block and corresponding producing geological reserves of each horizontal well, and based on the stable daily oil production and the corresponding producing geological reserves of the plurality of horizontal wells that have been put into production in each block, a storage-production correlation coefficient representing the relationship between the stable daily oil production and the producing geological reserves of the horizontal well in the corresponding block is constructed; and step 3), based on the storage-production correlation coefficient representing the relationship between the stable daily oil production and the producing geological reserves of the horizontal well in the corresponding block, productivity of the horizontal well in the corresponding block is predicted. Through the above method, productivity prediction of the horizontal well in the tight sandstone oil reservoir can be effectively and quickly realized.
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