A method for judging the risk of sand production in multi-layer gas storage of sandstone oil and gas reservoir

CN122347342APending Publication Date: 2026-07-07CHINA UNIV OF PETROLEUM (EAST CHINA)

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: CHINA UNIV OF PETROLEUM (EAST CHINA)
Filing Date: 2026-06-09
Publication Date: 2026-07-07

AI Technical Summary

Technical Problem

Existing technologies are insufficient to accurately determine the sand production risk of each sublayer in a multi-layer gas storage facility with combined injection and production, and conventional methods cannot account for the differences between reservoirs and the impact of flow disturbances, resulting in inaccurate sand production risk assessments.

Method used

The gas storage and injection/production wells are divided into several stratified evaluation units, which respectively characterize the sand production susceptibility, pressure circulation disturbance, flow velocity scour disturbance, and flow direction conversion disturbance of each stratum. A stratified sand production risk index is constructed, and the risk is ranked and the main controlling stratum is identified by combining the comprehensive risk characterization value and calibration coefficient.

Benefits of technology

It enables accurate assessment of the stratified sand production risk in multi-level combined injection and production wells, identifies the main sand production risk strata, provides a basis for stratified sand control design and dynamic adjustment, and improves the accuracy of evaluation results and field application capabilities.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN122347342A_ABST

Patent Text Reader

Abstract

The present application belongs to the technical field of sand control of gas wells of oil and gas reservoir type gas storage, and specifically provides a method for determining the risk of sand production in multi-layer injection-production wells of sandstone oil and gas reservoir type gas storage. By dividing the multi-layer injection-production wells into separate evaluation units, the degree of sand production, pressure cycle disturbance, flow scour disturbance, and flow direction conversion disturbance of each separate unit are characterized, and then a separate sand production risk index is constructed to realize the ordering, classification, and main control sand production risk layer identification of the relative sand production risks of different layers. The present application can specifically characterize the differences in sand production risks of different reservoir sublayers under the conditions of multi-layer injection-production of sandstone oil and gas reservoir type gas storage, and provide a basis for injection-production system optimization, separate sand control design, and sand production monitoring of injection-production wells.

Need to check novelty before this filing date? Find Prior Art