An experimental device and method for simulating shale oil elastic mining and CO2 throughput

By designing an experimental device to simulate the elastic extraction of shale oil and CO2 huff and puff, and combining high-temperature and high-pressure CO2 huff and puff with nuclear magnetic resonance testing, the problem of lacking full life cycle simulation in existing technologies has been solved, and a true evaluation of the oil production capacity of shale oil reservoirs has been achieved.

CN122328072APending Publication Date: 2026-07-03DAQING OILFIELD CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DAQING OILFIELD CO LTD
Filing Date
2025-01-02
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing technologies lack experimental equipment and methods to simulate the entire life cycle of shale oil, from elastic extraction to gas injection for energy replenishment and extraction, especially for shale oil reservoirs.

Method used

An experimental device for simulating elastic extraction and CO2 huff and puff of shale oil is designed, including a motor, a reactor, a core locking mechanism, a temperature and pressure regulation system, and a nuclear magnetic resonance (NMR) testing system. The entire life cycle of a shale oil reservoir is simulated by combining high-temperature and high-pressure CO2 huff and puff with NMR testing.

Benefits of technology

It achieves a realistic simulation of the entire life cycle of shale oil reservoirs, reflects the oil production capacity of shale oil reservoirs, calculates the degree of shale oil recovery and the saturation of mobile fluids, and realistically evaluates the oil production capacity of shale oil reservoirs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present disclosure relates to an experimental device and method for simulating shale oil elastic production and CO2 huff and puff, specifically by soaking the pressure-maintained sealed shale core in a simulation liquid to spontaneously escape gas, simulating the elastic production stage, then through the method of high-temperature and high-pressure CO2 huff and puff combined with nuclear magnetic resonance test, simulating the shale oil reservoir gas injection energy supplement production process after the end of the elastic production stage, through the above simulation, the component change of the gas produced by the core in different depletion development stages can be reflected, and the recovery degree of shale oil in the elastic development stage can be calculated, and the change of nuclear magnetic resonance T2 spectrum of shale before and after huff and puff can be tested in situ, giving the movable fluid saturation of shale, realizing the evaluation of the oil production capacity of shale under the original condition, thereby truly reflecting the oil production capacity of the shale reservoir, and effectively solving the problem that the existing technology lacks an experimental device and experimental method for simulating the whole life cycle of shale oil from elastic production to gas injection energy supplement production.
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