Shale gas well partition seepage production system optimization device and method

By designing a shale gas well zoned seepage production regime optimization device, simulating the fracturing and extraction process, and optimizing the production regime, the extraction problem caused by the low permeability of shale gas reservoirs was solved, and the recovery rate and development effect of shale gas were improved.

CN122264173APending Publication Date: 2026-06-23CHINA NAT PETROLEUM CORP +1
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Patent Information

Application Number
CN202411878605.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Shale gas reservoirs have low permeability, which makes extraction difficult. Improper production pressure differentials can lead to low production capacity or reservoir damage, affecting recovery rates.

Method used

A device for optimizing the zonal seepage production regime of shale gas wells is designed. It simulates the actual gas and liquid production process by combining multiple core samples, and uses a high-temperature and high-pressure core holder and pipeline connection device to simulate the fracturing and mining process, record pressure and flow data, and select the optimal production regime.

Benefits of technology

It can effectively simulate the zonal seepage characteristics of shale gas reservoirs, optimize production systems, improve the stable production time and ultimate recovery rate of shale gas, and guide the actual development of gas reservoirs.

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Abstract

The invention discloses a shale gas well partition seepage production system optimization device and method, and relates to the technical field of shale gas reservoir recovery efficiency improvement development, the shale gas well partition seepage production system optimization device comprises a plurality of high-temperature and high-pressure rock core holders with confining pressure devices, the high-temperature and high-pressure rock core holders are respectively provided with rock cores of different partitions in a reservoir, and the rock core holders are connected in series through pipelines; pressure gauges are assembled between the core holders and at the head end and the tail end; the pressure gauge at the head end is sequentially connected with a liquid flowmeter, a three-way valve, a back-pressure valve, a metal horizontal shaft and a gas flowmeter through pipelines; the three-way valve is connected with a fracturing fluid intermediate container through a pipeline, and the fracturing fluid intermediate container is connected with a high-pressure displacement pump II through a pipeline; the pressure gauge at the tail end is connected with a gas source intermediate container and a liquid recovery device through pipelines, the gas source intermediate container is connected with a high-pressure displacement pump III through a pipeline, by means of the method and device, the flow of yield and pressure drop distribution under different production systems can be studied, and reference can be provided for development of shale gas reservoirs according to actual production conditions of the gas reservoirs.
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