Whole-process multi-parameter monitoring device and method for simulating CO2 geological sequestration and use thereof

Patent metadata

Field	Value
Publication number	US-12312952-B2
Application number	US-202418784963-A
Country	US
Kind code	B2
Filing date	Jul 26, 2024
Priority date	Jul 28, 2023
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

The present disclosure relates to the field of CO 2 geological sequestration, and provides a whole-process multi-parameter monitoring device and method for simulating CO 2 geological sequestration and use thereof. A large-scale reactor body is developed, and a geological reservoir at a depth of 800 to 3000 meters is simulated. A modular built-in model device is researched and developed, a multi-type and variable-structure reservoir remodeling technology is developed, and mutual coupling of modules can be achieved. The design idea of separating the pressure reactor from the built-in sample model is adopted in the device. The confining pressure, the pore pressure, the temperature gradient, and the axial load of the device can be independently controlled through a temperature control mechanism and a loading mechanism respectively, so that the restoration of the state of in-situ stresses in the reservoir is realized.

First claim

What is claimed is:

1. A whole-process multi-parameter monitoring device for simulating CO 2 geological sequestration, comprising a high-pressure reactor, a temperature control system, a fluid injection system, and a multi-physical field detection system, wherein
the temperature control system is configured to control an ambient temperature and an internal temperature of the high-pressure reactor;
the fluid injection system is configured to inject different types of fluids into the high-pressure reactor;
the high-pressure reactor comprises a reactor cover, a reactor body, a confining pressure rubber bucket, and a plug assembly; the reactor cover is arranged above the reactor body, and the reactor cover is fixedly connected to an outer portion of the reactor body by a snap ring; the confining pressure rubber bucket is a bucket-shaped structure having an upper opening and a lower opening and is arranged inside the reactor body, an upper edge of the confining pressure rubber bucket is sealedly connected to a lower end of the reactor cover, and a lower edge of the confining pressure rubber bucket is sealedly connected to the plug assembly; a confining pressure chamber is formed by the confining pressure rubber bucket, the plug assembly, and the reactor body; the plug assembly comprises a plug cylinder and a plug piston assembly; the lower edge of the confining pressure rubber bucket is sleeved on and sealedly connected to an outer periphery of the plug cylinder; the plug piston assembly is arranged in an upper portion of the plug cylinder, an outer wall of the plug piston assembly is in close contact with and sealedly connected to an inner wall of the plug cylinder, and a hydraulic oil cavity for accommodating a hydraulic oil is formed between a lower portion of the plug piston assembly and the plug cylinder; a piston hydraulic interface is arranged at a bottom of the plug cylinder, and axial stress loading is controlled by an axial pressure tracking pump; the plug piston assembly is provided with a channel in communication with the fluid injection system, and the channel is configured to inject a fluid required for simulating the CO 2 geological sequestration to the confining pressure rubber bucket;
the multi-physical field detection system comprises different types of sensors arranged on the reactor cover, the reactor body, and the confining pressure rubber bucket to implement multi-dimensional detection; and the sensors comprise an electrical resistance tomography sensor connected to a plurality of resistivity electrodes on the confining pressure rubber bucket to implement electrical resistance tomography,
a cavity is provided above the plug piston assembly, and a porous plug plate and a filter plate covering a bottom section of the confining pressure rubber bucket are arranged above the cavity in sequence from bottom to top, the cavity above the plug piston assembly is defined between an upper portion of the plug piston assembly and the porous plug plate, and a gas injection column is arranged in the cavity above the plug piston assembly,
the hydraulic oil cavity is provided below the plug piston assembly, a gas injection transfer pipe is arranged in the hydraulic oil cavity below the plug piston assembly, and a first end of the gas injection transfer pipe is connected to the gas injection column,
the porous plug plate is provided with holes uniformly drilled thereon, and is configured to support a porous medium; a pore size of the filter plate prevents the porous medium from leaking out of the porous plug plate; a heating circulation pipe is arranged in the cavity above the plug piston assembly to control a ground temperature gradient; and a supporting column is arranged between a bottom of the cavity above the plug piston assembly and the porous plug plate to prevent a sand-filled sample from damaging the heating circulation pipe.

2. The whole-process multi-parameter monitoring device for simulating the CO 2 geological sequestration according to claim 1 , wherein the plug assembly further comprises a copper sleeve wear-resistant ring, the copper sleeve wear-resistant ring is sheathed in a groove on an outer wall surface of the plug piston assembly, and a guide groove is provided on an outer periphery of the copper sleeve wear-resistant ring to prevent the plug piston assembly from deviating during movement relative to the plug cylinder.

3. The whole-process multi-parameter monitoring device for simulating the CO 2 geological sequestration according to claim 1 , wherein a second end of the gas injection transfer pipe is connected to a gas injection module in the fluid injection system for injecting gas into a reservoir; a heat injection circulation transfer pipe is further arranged in the hydraulic oil cavity below the plug piston assembly, a first end of the heat injection circulation transfer pipe is connected to the heating circulation pipe, a second end of the heat injection circulation transfer pipe is connected to a temperature control water bath, and the heat injection circulation transfer pipe is configured to simulate the ground temperature gradient and control a vertical temperature gradient; and both the gas injection transfer pipe and the heat injection circulation transfer pipe are spirally shaped to prevent damage to pipelines during displacement.

4. The whole-process multi-parameter monitoring device for simulating the CO 2 geological sequestration according to claim 1 , wherein the multi-physical field detection system further comprises one or more of a pressure sensor measuring column, a temperature sensor measuring column, an acoustic dipole sensor, optical fiber sensors, or a confining pressure sensor; data acquisition cables of each sensor pass through the reactor cover and are connected to an external data acquisition system;
measuring column holes are provided on the reactor cover, a sealing sleeve is inserted at each of the measuring column holes, a plurality of pressure or temperature sensor conduits are arranged inside the sealing sleeve, the plurality of pressure or temperature sensor conduits and the sealing sleeve are welded by silver welding to form the pressure sensor measuring column or the temperature sensor measuring column, and the pressure sensor measuring column or the temperature sensor measuring column are each tightly connected to the reactor cover with a clamping nut; the temperature sensor measuring column requires filling of heat-conducting grease in the sealing sleeve to improve temperature measurement precision;
the optical fiber sensors are distributed around the confining pressure rubber bucket to monitor deformation of a reservoir;
the acoustic dipole sensor is connected to symmetrically distributed acoustic dipoles arranged in the reservoir, to study an occurrence form and a distribution law of a fluid flow process according to changes of acoustic characteristics;
the confining pressure sensor is arranged on a pipeline connected between a confining pressure tracking pump and the confining pressure chamber to monitor a pressure change in the confining pressure chamber;
the electrical resistance tomography sensor is connected to the plurality of resistivity electrodes to implement the electrical resistance tomography; each of the plurality of resistivity electrodes is an integral structure comprising an electrode sheet and a stud, the stud is perpendicular to a center of the electrode sheet, a surface of the electrode sheet is an arc surface having a same curvature radius as an inner surface of the confining pressure rubber bucket, and the electrode sheet is embedded in a groove pre-formed on an inner wall of the confining pressure rubber bucket, to ensure that the inner surface of the confining pressure rubber bucket is smooth and flat, and avoid impacts of the electrode sheet on deformation and m

Assignees

• Univ Dalian Tech

Inventors

• Song Yongchen
• Yang Lei
• Yang Mingjun
• Liu Yu
• Jiang Lanlan
• Guan Dawei
• Zhang Lunxiang
• Zhang Yi
• Li Yanghui
• Ling Zheng
• Yu Tao
• Chen Bingbing
• Wu Peng

Classifications

• G01N33/00

  Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00 · CPC title

• E21B43/164

  Injecting CO2 or carbonated water (in combination with organic material C09K8/594) · CPC title

• E21B47/07 Primary

  Temperature · CPC title

• E21B2200/20

  Computer models or simulations, e.g. for reservoirs under production, drill bits · CPC title

• E21B49/008 Primary

  by injection test; by analysing pressure variations in an injection or production test, e.g. for estimating the skin factor (measuring pressure E21B47/06) · CPC title