42 results about "Geological sequestration" patented technology

The invention discloses a method of carbon dioxide geological sealing based on the self-detaching of mixed fluid and relates to a method of carbon dioxide geological sealing. The invention comprises the following steps: (1) forming an injection well (10) and an emission well (20) in a selected geological sealing site; (2) injecting the mixed fluid containing CO2 continuously by a high pressure injection device into a geological sealing layer (43) through the injection well (10); (3) releasing the fluid moving to the emission well (20) through the emission well (20); (4) injecting the mixed fluid and releasing the emission well (20) continuously until the concentration of CO2 in the fluid discharged by the emission well (20) is larger than the economic concentration value. The invention is suitable for the field of CO2 geological sealing and for sealing CO2 in a deep brine layer, which is especially suitable for the CO2 geological sealing of the deep brine layer of the structure of inclined formation and dome.

Distributions of a Brillouin frequency shift and a Rayleigh frequency shift in optical fibers set up in a material are measured from scattered waves of pulse laser light entered into the optical fibers, and distributions of pressure, temperature, and strain of the material along the optical fibers at a measurement time point are analyzed using coefficients that are inherent to the set up optical fibers and correlate pressure, temperature, and strain of material with the Brillouin frequency shift and the Rayleigh frequency shift.

The invention provides a deep stratum environment carbon dioxide geological sequestration simulation experiment system. The deep stratum environment carbon dioxide geological sequestration simulation experiment system comprises a constant temperature box, a sound wave receiver, a temperature, pressure and flow stress coupling core device, a gas-liquid injection device, a gas-liquid discharge device and a confining pressure gas-liquid injection device, wherein the temperature, pressure and flow stress coupling core device is arranged in the constant temperature box. The temperature, pressure and flow stress coupling core device comprises a cylindrical core holding unit, a seal rubber sleeve, an upper stress transfer connector, a lower stress transfer connector, an upper pressure machine force transfer column, a lower pressure machine force transfer column, an upper sound wave transmitting and receiving probe and a lower sound wave transmitting and receiving probe, wherein the two ends of the core holding unit are provided with openings, the seal rubber sleeve is used for wrapping an experimental core in a sealed mode, the upper stress transfer connector, the lower stress transfer connector, the upper pressure machine force transfer column, the lower pressure machine force transfer column, the upper sound wave transmitting and receiving probe and the lower sound wave transmitting and receiving probe are matched with the openings at the two ends of the core holding unit, and the cylindrical body of the core holding unit is provided with a confining pressure gas-liquid injection port. By means of the deep stratum environment carbon dioxide geological sequestration simulation experiment system, a flow experiment of a stratum core sample in an in-situ environment of a deep stratum, a movement mode of carbon dioxide in deep underground rock holes is stimulated really, and accurate experimental data parameters can be obtained in real time.

The invention discloses a supercritical carbon dioxide geothermal power generation system and method. The system comprises a flashing loop valve, a flashing tank, a supercritical carbon dioxide loop valve, a turbine, an electric generator, a precooler, a compressor, an after-cooler, a fossil fuel power plant exhaust gas carbon dioxide collecting and treating device, an injection well, an output well and the like. The system can realize the purpose of developing geothermal resources and also can realize geological sequestration of carbon dioxide in exhaust gas of a fossil fuel power plant, so that the situation that the thermal power plant and geothermal exploitation are combined to generate electricity so as to realize zero emission of carbon dioxide becomes possible.

The invention provides an in-situ on-line measurement method for solubility of CO2 in pure water. The method comprises two parts as follows: drawing a standard curve and measuring solubility of CO2 inpure water. The method has the advantages of being direct, low-consumption, accurate and convenient, realizing continuous operation and the like, temperature gradient of the reaction can be effectively reduced by a quartz capillary tube, and the defects that bulk temperature is lower than set temperature and measurement value is too large when the system is under the condition close to the environment temperature are overcome; besides, according to the method, in-situ on-line analysis based on Raman spectrum is applied to the system innovatively, a peak height ratio of CO2 to pure water in the system is detected and calculated in a certain period of time, whether the system reaches thermodynamics balance is judged by measured value comparison, accuracy of measured CO2-H2O system solubility is guaranteed, and a new thinking is provided for research of measuring dissolution characteristics of CO2 in geological sequestration under conditions of certain temperature and pressure.

A process for geo-sequestration of a water-soluble fluid includes selecting a target water-laden geological formation bounded by an upper formation of low permeability, providing an injection well into the formation and injecting the fluid into the injection well under conditions of temperature, pressure and density contrast selected to cause the fluid to enter the formation and rise within the formation. This generates a dynamic density-driven convection current of formation water which promotes enhanced mixing of the water-soluble fluid with formation water.

The invention discloses a method for carrying out compressed carbon dioxide energy storage on deep aquifer carbon dioxide geological sequestration. The method comprises the steps of engineering site selection, well drilling construction, ground energy storage system arrangement, carbon dioxide transportation, injection and production and system operation period monitoring and feedback. Carbon dioxide generated in industrial activities is purified and collected, is transported to a selected site through a pipeline or a tank car, and is continuously compressed and injected into a water-containing (salt water) layer by utilizing surplus electric power generated by solar energy and wind energy, so that geological storage and electric power storage of the carbon dioxide are realized; part of carbon dioxide is extracted from the salt water layer for power generation in the peak period of power utilization, and the carbon dioxide after power generation is injected into the water-containing (salt water) layer again for storage. The problems of renewable energy power generation volatility, uncontrollability and the like are solved while large-scale storage of carbon dioxide is achieved, and energy conservation and emission reduction and efficient utilization of renewable energy are facilitated.

The invention provides a CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method. The CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method is suitable for simulating CO2 geological sequestration and enhancement gas extraction induced outburst risk testing, and comprises the stages of the previous preparation stage, the gas outburst inoculation stage, the gas outburst stage before coal seam CO2 injection for gas displacement, the stage of coal seam CO2 injection for gas displacement, the CO2 outburst testing stage after compressed coal seam CO2 injection for gas displacement, and evaluation for the measure of preventing outburst through coal seam CO2 injection for gas displacement. The CO2 geological sequestration and enhancement gas extraction induced outburst risk testing method is simple in step, good in detecting property, and capable of simulating the outburst coal seam CO2 geological sequestration and enhancement gas extraction process under the large-scale condition; gas outburst simulation experiments under the different conditions and CO2 outburst simulation experiments after CO2 injection can be developed; and the coal seam CO2 outburst strength under the different CO2 geological sequestration conditions and the original coal seam gas outburst strength are compared, thus the outburst risk after coal seam CO2 sequestration can be effectively tested and evaluated, the CO2 sequestration conditions are further optimized, and important guiding significance for coordinating on-site coal mine outburst prevention and treatment and CO2 geological sequestration is achieved.

A converted wave AVO calculating method of four-dimensional multi-component seismic monitoring in CO2 geological sequestration is disclosed. The method is characterized by simulating PS1converted wave and PS2 converted wave AVO corresponding to different incident angles and different orientations in different phases of CO2 injection and geological sequestration under the condition that storage layer hole pressure, CO2 saturation and a fracture density are changed; aiming at a storage layer, for an isotropic medium and an anisotropic medium, in different phases of CO2 injection, under the condition that the storage layer hole pressure and mixed fluid saturation are changed, carrying out storage-layer elasticity parameter changes and AVO changes; aiming at an HTI media model, simulating crack opening caused by increase of injection well pressure and crack closing caused by decrease of production well pressure; aiming at porosity and crack density changes, analyzing four-dimensional converted wave AVO and orientation AVO changes in the anisotropic medium before and after the CO2 injection, wherein the changes are caused by fracture density changes. Four-dimensional converted wave earthquake data is calibrated and interpreted, CO2 oil displacement efficiency, an underground sequestration state of CO2 and a distribution scope are determined and safety of the CO2 geological sequestration is evaluated.

The invention discloses a device and method for analyzing the influence of CO2 escape of an oil reservoir geological sequestration body on the environment. The device comprises an oil reservoir sequestration body simulation module, a CO2-to-environment influence simulation module, a CO2 escape evaluation module and a data acquisition module, wherein the oil reservoir sequestration body simulationmodule is used for simulating CO2 diffusion escape and CO2 seepage escape conditions in the sequestration process of CO2 in a stratum; the CO2-to-environment influence simulation module is used for researching and testing the influence rule of CO2 escaped from the oil reservoir sequestration body simulation module on the environment; the CO2 escape evaluation module is used for evaluating a CO2 diffusion escape rate and a CO2 seepage escape rate; and the data acquisition module is used for receiving, processing and operating data of the oil reservoir sequestration body simulation module, the CO2-to-environment influence simulation module and the CO2 escape evaluation module. According to the invention, the escape characteristic of CO2 from the geologic body can be analyzed, the influence on the environment after CO2 escape can also be analyzed, and the device has important significance in CO2 sequestration research; and the device has the advantages of reasonable structure, simple operation, accurate data, high efficiency and practicability.

The invention discloses a system for experimentally simulating CO2 geological storage feasibility, which comprises a simulation cabin, a thermotank, a first pressure pump, a first pressure sensing rod, a second pressure pump, a second pressure sensing rod, a third pressure pump, a third pressure sensing rod, a CO2 gas cylinder, a CH4 gas cylinder, a first guide pipe, a second guide pipe, a first flow meter, a third guide pipe, a first lime aqueous solution bottle, a second guide pipe, a first flow meter, a third guide pipe, a first lime aqueous solution bottle, a fourth guide pipe, a second flow meter, a fifth guide pipe, a second lime aqueous solution bottle, a sixth guide pipe, a third flow meter, a seventh guide pipe, a third lime aqueous solution bottle, a first electronic balance, a second electronic balance and a third electronic balance. The system can simulate the sequestration feasibility of CO2 under different geological conditions.

The invention discloses a method for integrating in-situ pyrolysis of oil-rich coal and geological storage of CO2. The method comprises the following steps that 1, drilling is achieved to form an injection well, an extraction well and a horizontal well, and the injection well communicates with the extraction well through the horizontal well; 2, holes are drilled in the surface of a coal seam of the horizontal well, then heating and pyrolyzing are achieved by adopting a pyrolysis thermodynamic system, and the obtained pyrolysis gas product is treated in an oil gas collection and separation system; and 3, a pyrolysis technology in the second step is repeated, after the pyrolysis technology is finished, supercritical CO2 is injected through a sealing heat power system and adsorbed on the pyrolysis solid product in a drill hole, and the CO2 geological storage process is completed. According to the method for integrating in-situ pyrolysis of the oil-rich coal and geological storage of the CO2, the oil-rich coal in the coal seam is subjected to in-situ heating pyrolysis to be converted into oil gas, then the CO2 is fully adsorbed through pyrolysis solid products for CO2 geological storage, integration of in-situ pyrolysis of the oil-rich coal and the geological storage of the CO2 is achieved, green and safe mining and utilization of coal are achieved, and the pyrolysis and storage cost is reduced.

The invention discloses an in-situ pyrolysis system for coupling self-heat generation and electric heating of oil-rich coal. The in-situ pyrolysis system comprises a wind-light complementary power generation device, a heat injection well/air cooling inlet well, a production well/air cooling outlet well, an electric heating well, a temperature monitoring well, a high-temperature heat exchanger, a primary separation device, a secondary separation device, a medium-temperature coal tar storage tank, a low-temperature coal tar storage tank and the like. Aiming at the long period required by underground direct pyrolysis of the oil-rich coal, the invention adopts a method of slowly oxidizing self-generated heat of coal to assist an electric heating well to heat a land parcel, and aims at a large amount of waste heat generated by underground direct pyrolysis of the oil-rich coal, an air cooling system is constructed, and the waste heat is effectively transferred to a next land parcel for use. In order to achieve conditions required by slow oxidation of coal, preheating air needs to be secondarily preheated, and the temperature and the amount of oxygen entering a coal seam area are strictly controlled by a temperature control system. The whole system inputs electric energy, outputs oil, captures CO2 and carries out geological sequestration, the atmospheric pollution and the greenhouse effect are relieved, and the rest of energy is fully utilized.

The invention provides an anti-seismic system used for an underground neutron energy power station and relates to the technical field of underground energy structures and geological sequestration. Theunderground neutron energy power station comprises a main tunnel structure body and at least one branch tunnel structure body connected to one end of the main tunnel structure body. The main tunnel structure body is formed by connecting two or more main tunnel units in series, anti-seismic seam structures are arranged between linings of the adjacent main tunnel units and are arranged between thelinings of the branch tunnel bodies and linings of the main tunnel units adjacent to the branch tunnel bodies, and damping layers are wrapped outside the linings of the main tunnel units and the linings of the branch tunnel structure bodies. By means of the anti-seismic system used for the underground neutron energy power station, the anti-seismic fortification which is feasible and high in safetycan be provided for the underground neutron energy power station, and it is ensured that equipment in the underground neutron energy power station runs safely.

The invention belongs to the technical field of carbon peak reaching and carbon neutralization, and particularly relates to a complex terrain CFD computational domain modeling method and a geological sequestration CO2 leakage simulation and risk assessment system. The modeling method is simple, and three-dimensional modeling of complex terrains such as loess loess ridge beam areas can be achieved through data conversion. The simulation and risk assessment system comprises a CO2 exposure concentration acquisition module, a CO2 exposure reference concentration module, a health risk assessment module and a health risk spatial and temporal distribution visualization module, the simulation and risk assessment system based on modeling has good visualization characteristics, and the CCUS potential leakage risk assessment with high speed, high operability, high precision and high visualization degree is realized.

The invention belongs to the technical field of carbon dioxide geological sequestration and capture, and discloses a method for carbon sequestration by using an organic ore bed subjected to in-situ pyrolysis. According to the method, on the basis of in-situ efficient pyrolysis of the organic ore bed, a large number of pore fracture spaces in the pyrolyzed ore bed are used for physical sequestration of the carbon, a large number of free metal ions in the pyrolyzed ore bed are used for chemical sequestration of the carbon, and therefore efficient and stable sequestration of carbon dioxide are achieved. Water is injected into the ore bed subjected to in-situ pyrolysis, so that calcium and magnesium ions in the ore bed are dissolved into the water, and good conditions are provided for a reaction of the carbon dioxide and the calcium and magnesium ions; a double sequestration technology of physical sequestration and chemical sequestration is formed; and the method is particularly suitable for sequestration of the carbon dioxide by using the organic ore bed subjected to in-situ pyrolysis and having different thicknesses with the depth of 300 m.

The invention discloses a method for comprehensive assessment of geological sequestration CO2 leakage tolerance of crops. The method includes steps: calculating single-index tolerance coefficients, subjecting each index to correlation analysis and calculating a correlation coefficient matrix according to a correlation coefficient calculation method, performing principal component analysis on the basis of the correlation coefficient matrix, converting multiple original correlative indexes into few new independent comprehensive indexes, and selecting j principal components as the comprehensive indexes on the basis of principal component analysis, wherein sigma Pj>0.85; according to a fuzzy comprehensive evaluation method, calculating CO2 comprehensive tolerance indexes (Dk) of each crop by formulas as shown in the specification. Eight typical C3 and C4 crops in the loess plateau of northern Shaanxi are used as objects for creating the method for assessment of CO2 tolerance of the crops,crops tolerant to high-concentration CO2 is screened out, and references are provided for agricultural production decisions in CCS projection areas in the loess plateau of northern Shaanxi.

The invention provides a carbon dioxide flooding multi-stage streamline injection production simulation device and simulation method, and relates to the technical field of carbon sequestration and petroleum exploitation. The carbon dioxide flooding multi-stage streamline injection production simulation device comprises a shell, a simulation reservoir module for simulating a displacement process, and a tubular column module for forming an injection production channel with the simulation reservoir module, the simulation reservoir module and the tubular column module are stacked and arranged in the shell, the shell is provided with an opening for mounting the simulation reservoir module and the tubular column module, the simulation reservoir module comprises a simulation reservoir and at least three injection production hole tubular column modules in communication with the simulation reservoir, the tubular column module is further configured to change a multi-stage injection production relationship by controlling opening and closing of a plurality of valves, thereby completing simulation of a current well pattern to a target well pattern. The carbon dioxide flooding multi-stage streamline injection production simulation device and simulation method can simulate carbon dioxide flooding and dynamic geological sequestration processes in a complex well pattern environment.