Natural gas hydrate saturation prediction method, device, equipment, medium and product

CN119291806AActive Publication Date: 2025-01-10CHINA OILFIELD SERVICES LTD
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Patent Information

Application Number
CN202411836070.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-01-10
Estimated Expiration
2044-12-13

AI Technical Summary

Technical Problem

In the exploration of natural gas hydrate, resistivity logging causes inaccurate prediction of reservoir parameters due to the influence of formation and pore fluid types, and a method for predicting natural gas hydrate saturation based on actual geological conditions is urgently needed.

Method used

By analyzing and processing the logging data, a natural gas hydrate image is generated using the watershed algorithm, the hydrate face rate is calculated, and a hydrate saturation prediction model is established based on experimental test data, and the resistivity and hydrate storage status are comprehensively considered to be accurate saturation prediction.

Benefits of technology

It improves the accuracy of natural gas hydrate saturation prediction, suppresses dark point noise interference, and has the clear and complete profile of the extracted hydrate, which is of significance to guide the exploration and development of natural gas hydrate.

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Abstract

The invention discloses a natural gas hydrate saturation prediction method, device, equipment, medium and product, and relates to the field of exploration, and the method comprises the steps: carrying out the analysis processing of logging information, and obtaining an imaging logging image and a natural gas hydrate reservoir condition; performing natural gas hydrate identification processing on the imaging logging diagram by using a preset algorithm to obtain a natural gas hydrate image; calculating the hydrate surface porosity according to the natural gas hydrate image; according to the natural gas hydrate reservoir conditions, experimental testing is conducted, the saturation degree of the second natural gas hydrate is calculated according to experimental testing data, and the relation between the saturation degree of the second natural gas hydrate and the resistivity is determined; a hydrate saturation prediction model is established according to the relation between the first natural gas hydrate saturation, the hydrate surface porosity and the second natural gas hydrate saturation in the logging information and the resistivity; and the natural gas hydrate saturation corresponding to the to-be-predicted well is determined by using the hydrate saturation prediction model, so that the prediction accuracy is improved.
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Citation Information

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