Device and method for monitoring CO2 wave and dynamic state in CO2 injection process of gas reservoir rock
A technology for reservoirs and rocks, which is applied in the field of devices for monitoring CO2 sweep dynamics during CO2 injection in gas reservoir rocks, can solve the problem of destroying gas seepage and distribution states, unable to realize porous media seepage and distribution rules, and unable to realize real-time monitoring And other issues
Active Publication Date: 2022-08-05
CHINA UNIV OF MINING & TECH
View PDF37 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, compared with gas-liquid seepage in reservoirs, CO
2
The ripple dynamics of
2
- Lack of accurate real-time monitoring of CO in physical simulations of the EGR mechanism
2
Sweep dynamic means, unable to achieve the CO in porous media
2
Direct study of seepage and distribution laws
In some existing experiments, the gas in the porous medium is sampled and its composition is analyzed to monitor the CO in the mixed gas.
2
Concentration, judge CO
2
distribution, because the gas seepage and distribution state are destroyed during the sampling process, and real-time monitoring cannot be realized, the results are not convincing
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0040] The specific embodiments of the present invention will be briefly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work For example, all belong to the protection scope of the present invention.
[0041] Figure 1-Figure 3 The preferred embodiments of the present invention are shown and analyzed in detail.
[0042] like figure 1 A monitoring gas reservoir rock is shown for CO injection 2 process CO 2 The device that affects the dynamics includes a quartz sandstone slab model 1, a fluid injection system, a confining pressure application system, a back pressure system, a sampling system, a vacuum pump 13 and a data acquisition and processing system.
[0043] like figure 2 , 3 As shown, ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| size | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a device and a method for monitoring the CO2 wave and dynamic state in the CO2 injection process of gas reservoir rock, and relates to the technical field of oil and gas field development engineering. The device comprises a quartz sandstone plate model, a fluid injection system, a confining pressure applying system, a pressure returning system, a sampling system, a vacuum pump and a data collecting and processing system. The quartz sandstone plate model comprises a quartz sandstone plate, an epoxy resin layer, a hydraulic oil cavity and a pressure-resistant shell from inside to outside, and a PH probe, an injection pipeline and an extraction pipeline are pre-embedded in the quartz sandstone plate. The PH value of CO2-dissolved saline water in pores of the porous medium at different positions in the model is monitored in real time by adopting a PH probe, the relative concentration of CO2 at the positions is calculated, a distribution dynamic graph of CO2 in the large-scale porous medium is drawn in real time through a data analysis system, the CO2 distribution dynamic rule in the CO2 injection process can be better simulated and monitored, and the real-time monitoring of the CO2 injection process is realized. And an effective means is provided for improving the recovery ratio by injecting CO2 into the rock of the gas reservoir and researching a CO2 burying mechanism.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development engineering, in particular to a monitoring gas reservoir rock injection CO 2 process CO 2 Apparatus and method for affecting dynamics. Background technique [0002] During the development of gas reservoirs, the continuous decrease of pressure will lead to reservoir stress sensitivity and edge and bottom water intrusion, resulting in a decrease in reservoir permeability and an increase in reservoir water saturation, which will seriously affect the productivity of gas wells and the ultimate reservoir recovery. influences. CO injection into depleted gas reservoirs 2 It can effectively maintain or even increase reservoir pressure, replenish gas reservoir energy, delay edge and bottom water intrusion, and improve gas well productivity and ultimate gas reservoir recovery (CO2). 2 -EGR). due to CO 2 and CH 4 density difference, injected CO 2 Eventually accumulate at the bott...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/24G01N15/08G01N13/04
CPCG01N33/24G01N15/082G01N13/04Y02P90/70
Inventor 王千申建
Owner CHINA UNIV OF MINING & TECH