Method for reinforcing geological storage by injecting nanoparticles to stabilize CO2 microbubbles
A geological storage and nanoparticle technology, applied in the field of multiphase flow, can solve the problems of poor storage safety and slow dissolution speed, and achieve the effects of reducing buoyancy, reducing surface tension and enhancing thermal conductivity.
Active Publication Date: 2022-07-12
DALIAN UNIV OF TECH
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Problems solved by technology
[0004]
Considering the reservoir conditions comprehensively, for the residual storage and dissolution storage of CO
2
The dissolution rate is slow, and the security of storage is poor in the later stage of dissolution, etc., the present invention proposes an accelerated reservoir CO
2
The dissolution method with salt water, that is, the injection of nanoparticles to stabilize CO
2
Microbubble enhanced geological storage method
Method used
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Embodiment 1
[0027] figure 1 for a SiO injection 2 Nanoparticles stabilize CO 2 Schematic diagram of microbubble enhanced geological storage method, combined with attached figure 1 To further describe the method:
[0028] Step 1: Determine the location of the injection well;
[0029] Select an area with gentle terrain, stable geological structure and good storage capacity as the storage location, install injection wells at a relatively reasonable reservoir depth, install monitoring devices 7 around the injection wells, and use deep and shallow monitoring techniques to monitor leakage and blockage in real time risks of;
[0030] Step 2: Get SiO 2 Nanoparticles;
[0031] The raw material collection tank 1 is loaded into the preparation of SiO 2 The raw material of the nano-particles enters the nano-sand mill 2 for grinding through the pipeline, and then passes into the nano-particle filter 4 to filter out the nano-particles with the nano-particle size less than 500 nm.
[0032] Step ...
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Abstract
The invention discloses a method for reinforcing geological sequestration by injecting nanoparticles to stabilize CO2 microbubbles, and belongs to the technical field of multiphase flow. According to the method, firstly, CO2 and nano-particles are premixed to improve the physical property of fluid, then the fluid is conveyed to the underground through a high-pressure pipeline, CO2 micro-bubbles containing the nano-particles are generated through a compact porous plate arranged in an injection well, the dissolution speed and the sweep efficiency of gas in a saline water layer are improved, and later mixing of the fluid is enhanced. By means of the combined injection mode, the storage amount and storage safety of CO2 can be improved, and the gas leakage risk of the reservoir is further reduced.
Description
technical field [0001] The invention belongs to the technical field of multiphase flow, and relates to a nano-particle-injected stable CO 2 Microbubble enhanced geological storage method. Background technique [0002] with CO 2 The massive emission of greenhouse gases as the main cause of global warming, greenhouse gas emission reduction has become the focus of global attention. of which CO 2 Capture and storage (CCS) technology has become an effective way to reduce greenhouse gas emissions, especially in underground saline aquifers with large storage capacity, deep burial depth and wide distribution. For example, my country's Shenhua Ordos project has successfully launched the first 300,000-ton scale CCS full-process demonstration project, so the current CO 2 The prospect of storage in saline aquifers is good, and the South China Sea is also building the first marine saline aquifer storage project. [0003] The saline layer mainly captures the injected CO by residual s...
Claims
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IPC IPC(8): C01B32/50E21F17/16
CPCC01B32/50E21F17/16Y02P90/70C09K8/594C09K2208/10
Inventor 宋永臣蒋兰兰王思佳王欣杨明军刘瑜王大勇
Owner DALIAN UNIV OF TECH