A method for determining the original oil-water interface of a block-shaped bottom water buried hill reservoir

By comprehensively utilizing gas logging, geochemical logging, and well logging technologies, combined with trial production evaluation, the problem of identifying the original oil-water interface in blocky bottom-water buried hill oil reservoirs has been solved, achieving accuracy and efficiency in reserve calculation and development deployment.

CN121066564BActive Publication Date: 2026-06-23PETROCHINA CO LTD
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Patent Information

Application Number
CN202410715825.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-04
Publication Date
2026-06-23
Estimated Expiration
2044-06-04

AI Technical Summary

Technical Problem

Existing technologies make it difficult to accurately identify and determine the original oil-water interface of blocky bottom-water buried hill oil reservoirs, affecting the accuracy of reserve calculations and development deployment.

Method used

By comprehensively utilizing gas logging, geochemical logging, and well logging technologies, combined with trial production evaluation, and by determining the oil-water interface difference points and calculating the weights, the preliminary interface is corrected to obtain the final interface. This method is suitable for layered blocky bottom water buried hill oil reservoirs.

Benefits of technology

It enables accurate calculation of the original oil-water interface in blocky bottom-water buried hill oil reservoirs, providing a reliable basis for reserve evaluation and development deployment, and improving exploration efficiency and development results.

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Abstract

The present application relates to a kind of block bottom water buried hill reservoir original oil-water interface determination method, belong to the technical field of reservoir development.In single stratum trap, the favorable position of structure is selected to implement test production well, and the preliminary original oil-water interface h i Of stratum trap is obtained by geological information, then the test production well is carried out test production by selecting perforation horizon, when the comprehensive water content of test production well evaluation period is not more than 10%, preliminary original oil-water interface h i Equal to final original oil-water interface h u When the comprehensive water content of test production well evaluation period is more than 10%, preliminary original oil-water interface is reviewed and corrected, so that final original oil-water interface is accurately calculated.The present application comprehensively considers the trap type and storage and seepage characteristics of block bottom water buried hill reservoir, and accurately calculates the original oil-water interface of block bottom water buried hill reservoir with layered structure by using multiple technical means such as comprehensive geochemical logging, well logging, gas logging, test production evaluation, etc., to provide basis for reserve evaluation and development deployment.
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