CN113187450A - CO (carbon monoxide)2Electric reduction burying and oil extraction method - Google Patents
CO (carbon monoxide)2Electric reduction burying and oil extraction method Download PDFInfo
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- 238000000605 extraction Methods 0.000 title claims abstract description 13
- 230000009467 reduction Effects 0.000 title claims abstract description 12
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 3
- 239000003921 oil Substances 0.000 claims abstract description 60
- 230000003197 catalytic effect Effects 0.000 claims abstract description 55
- 239000010779 crude oil Substances 0.000 claims abstract description 50
- 238000011084 recovery Methods 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 28
- 239000007924 injection Substances 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 17
- 238000011065 in-situ storage Methods 0.000 claims abstract description 13
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 230000009919 sequestration Effects 0.000 claims description 34
- 239000002105 nanoparticle Substances 0.000 claims description 25
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 9
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 8
- 235000019253 formic acid Nutrition 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 7
- 238000006073 displacement reaction Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000009933 burial Methods 0.000 description 3
- 238000004523 catalytic cracking Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003129 oil well Substances 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 methanol Chemical class 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
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- Physical Or Chemical Processes And Apparatus (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The application discloses a CO2An electroreduction method for recovering oil and recovering oil based on the catalytic negative electrode and inert positive electrode respectively connected to the injection well and the extraction well in the same communicated well group includes adding CO2Injecting a crude oil reservoir through the injection well; energizing the catalytic negative electrode and the inert positive electrode; using the catalytic negative electrode and the inert positive electrode to CO2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2And the target product is used for displacing crude oil, and the catalytic cathode and the inert anode are also used for carrying out in-situ crude oil electrocatalytic cracking to improve the flowability of the crude oil. CO as described above2The method for electric reduction and oil recovery can improve CO2The method has the advantages of improving the recovery ratio of the oil deposit, ensuring the energy safety and reducing the emission of greenhouse gases.
Description
Technical Field
The invention belongs to crude oil exploitation and CO2The technical field of sequestration, in particular to CO2An electroreduction burying and oil extraction method.
Background
Currently, CO2Emission reduction, capture and sequestration have risen to the national governance level, and CO2Technology for burying and increasing recovery ratioHas important significance for national greenhouse gas emission reduction and fossil energy safety, and is receiving more and more extensive attention. However, CO is now common2Technology for sequestration and enhanced recovery (CO)2Immiscible phase flooding, CO2Miscible flooding, CO2Supercritical flooding, carbonated water flooding, etc.) primarily of CO2Injection into reservoir for CO2Physical sequestration, in the process, CO is not sequestered2Undergoes chemical conversion so that CO is present2Low burying efficiency and poor effect of improving the recovery ratio.
For example, there is now a well over-critical over-injection of CO2Realizes the maximum solid burying and residual oil displacement technology, which comprises a high-pressure air pump injection well, an oil extraction well, a plugging area, a fracturing crack, a breaking crack and CO2A dispersion area, injecting CO into the oil layer of the waste oil field or the oil area by a high-pressure air pump through an injection well at supercritical pressure2The method utilizes the super-strong permeability, diffusivity and cleaning capacity of the solution to displace thick, sticky and scattered residual oil to be discharged from an oil well, and injects plugging materials into an injection well at intervals and repeatedly to block a smooth channel between the injection well and the oil well to force CO2Liquid diffusion pressurization, fracturing oil layer interlayer and penetrating same-layer oil area interval, diffusion to all intervals, dead angles and blind areas, and the scheme completely displaces residual oil and buries solid CO2Large amount, stable storage, reduced air pollution and no underground pollution. However, this solution has the following drawbacks: injecting supercritical CO into seam net development area2The gas channeling is serious, so the extraction effect is poor; large amount of supercritical CO2Extracting light components in the crude oil to cause asphaltene precipitation, so that a flow space is easy to block; supercritical CO2After injection, it is rapidly extracted, so that CO2The burying efficiency is low.
Disclosure of Invention
In order to solve the problems, the invention provides CO2The method for electric reduction and oil recovery can improve CO2The method has the advantages of improving the recovery ratio of the oil deposit, ensuring the energy safety and reducing the emission of greenhouse gases.
The invention provides CO2Electroreduction burial and miningAn oil method based on a catalytic negative electrode and an inert positive electrode respectively connected to an injection well and a production well within the same communicating well group, comprising:
introducing CO2Injecting a crude oil reservoir through the injection well;
energizing the catalytic negative electrode and the inert positive electrode;
using the catalytic negative electrode and the inert positive electrode to CO2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2And the target product is used for displacing crude oil, and the catalytic cathode and the inert anode are also used for carrying out in-situ crude oil electrocatalytic cracking to improve the flowability of the crude oil.
Preferably, in the above CO2In the electroreduction sequestration and oil recovery method, water and nano-particles are mixed with the CO2And injecting the crude oil reservoir through the injection well, wherein the nano particles at least comprise particles with the same material as the catalytic negative electrode.
Preferably, in the above CO2In the electroreduction sequestration and oil extraction method, the nanoparticles also comprise particles made of the same material as the inert positive electrode.
Preferably, in the above CO2In the electroreduction sequestration and oil recovery method, the diameter of the nanoparticle is 10nm to 150 nm.
Preferably, in the above CO2In the electroreduction sequestration and oil recovery method, the water and nanoparticles are mixed with the CO2Prior to simultaneous injection into the crude oil reservoir through the injection well, further comprising:
CO generation using high temperature, high pressure vessels simulating formation conditions2Water and the nano particles are stirred into a mixed solution.
Preferably, in the above CO2In the electroreduction oil-burying and oil-extracting method, when the low-permeability oil reservoir is exploited, 10m is used3D to 20m3Injecting the mixed solution into the crude oil reservoir at a rate of/d;
when a fractured reservoir is produced, 10m3D to 15m3The mixed solution is injected at a speed of/dIn the crude oil reservoir.
Preferably, in the above CO2In the electroreduction sequestration and oil recovery method, the mass fraction of the nanoparticles in the mixed solution is 0.01% to 0.05%.
Preferably, in the above CO2In the method for electroreduction sequestration and oil recovery, the energizing the catalytic negative electrode and the inert positive electrode comprises:
and electrifying the catalytic negative electrode and the inert positive electrode until the voltage gradient is 500.0V/m to 1000.0V/m.
Preferably, in the above CO2In the electroreduction sequestration and oil extraction method, the catalytic cathode is a catalytic electrode with a target product of methane, a catalytic electrode with a target product of methanol or a catalytic electrode with a target product of formic acid, and the inert anode is a C electrode or a Pt electrode.
Preferably, in the above CO2In the electroreduction sequestration and oil extraction method, the diameters of the catalytic cathode and the inert anode are 1cm to 6 cm.
As apparent from the above description, the present invention provides the above CO2The electroreduction method for burying and oil production includes the first CO recovery2Injecting a crude oil reservoir through the injection well; then electrifying the catalytic cathode and the inert anode; finally, the catalytic negative electrode and the inert positive electrode are utilized to react with CO2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2The target product is used for displacing crude oil, and the catalytic cathode and the inert anode are used for carrying out in-situ crude oil electrocatalytic cracking to improve the fluidity of the crude oil, so that the method can improve CO2The oil reservoir burying efficiency can also improve the recovery ratio of the oil reservoir, ensure the energy safety and reduce the emission of greenhouse gases.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 shows a CO according to the present invention2A schematic of an embodiment of an electroreductive sequestration and recovery process;
FIG. 2 shows CO2A schematic diagram of an electrorecovery sequestration and production system;
FIG. 3 is a schematic diagram of a core recovery curve under different displacement systems;
FIG. 4 shows CO2Displacement and CO2Electroreduction of displaced CO2And burying efficiency schematic diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides CO2The method for electric reduction and oil recovery can improve CO2The method has the advantages of improving the recovery ratio of the oil deposit, ensuring the energy safety and reducing the emission of greenhouse gases.
The invention provides CO2An embodiment of the electroreduction sequestration and oil recovery method is shown in fig. 1 and 2, wherein fig. 1 is a CO provided by the invention2FIG. 2 is a schematic diagram of an embodiment of an electroreductive sequestration and oil recovery process, with CO2The schematic diagram of the electric reduction sequestration and oil production system is that based on the catalytic negative electrode 203 and the inert positive electrode 204 which are respectively connected to the injection well 201 and the production well 202 in the same communicated well group, the proper catalytic negative electrode can be selected according to the characteristics of crude oil, and different types of catalytic negative electrodes correspond to different CO2The electro-reduction product, a different crude oil catalytic cracking pathway, plays a different role in the enhanced oil recovery process, wherein the catalytic negative electrode 203 is powered by the negative electrode 207 of the power plant 205 and the inert positive electrode 204 is fed by the positive electrode 206 of the power plant 205The power is supplied, it should be noted that the power generation device is not limited to a common generator, but may also be a power generation device utilizing renewable energy, such as a wind power generation device or a photovoltaic power generation device, and the method may include the following steps:
s1: introducing CO2Injecting a crude oil reservoir through an injection well 201;
it is to be noted that CO2The injection can be carried out under normal pressure or high pressure, and is not limited in the above, and the injection can be used for displacing crude oil, and the appropriate injection speed can be selected according to the actual situation of the crude oil.
S2: electrifying the catalytic cathode and the inert anode;
the electric field intensities of the catalytic negative electrode and the inert positive electrode can be adjusted to optimum values by adjusting the power generation device.
S3: using catalytic negative and inert positive electrode to CO2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2The target products can be, but are not limited to, formic acid, methanol and methane, and the crude oil is displaced by the target products, and the crude oil is subjected to in-situ electro-catalytic cracking by a catalytic cathode and an inert anode so as to improve the fluidity of the crude oil.
Note that, in this case, CO2The catalytic negative electrode can be CO simultaneously injected and the electric field applied2Reaction occurs, so that the buried CO is not easy to leak, and CO is realized2The burial efficiency is greatly improved, and theoretically, CO is generated firstly2Electroreduction of CO2Is totally consumed to generate formic acid, methanol and the like which are dissolved in water to displace crude oil, and actually, the efficiency of a catalytic electrode is limited, and part of CO2The electric reduction generates formic acid and methanol which are dissolved in water to displace crude oil, and the other part of the CO which is not reduced2The two electrodes can be used for carrying out crude oil catalytic cracking, so that the flowability of the crude oil is improved, and the crude oil can be further conveniently exploited.
It is also noted that the presence of the electric field and the catalytic electrode catalyzes CO2Electroreduction productionThe crude formic acid, the methanol, the methane and the like can change the original oil-water-rock reaction of the oil reservoir and realize the improvement of the recovery ratio, in addition, the existence of an electric field and a catalytic electrode can effectively catalyze and crack the crude oil, realize the in-situ modification of the crude oil, reduce the viscosity of the crude oil and improve the flowability, and the three actions are mutually cooperated and jointly promoted, thereby the recovery ratio of the oil reservoir can be obviously improved.
As apparent from the above description, the present invention provides the above CO2In the embodiment of the electroreduction sequestration and oil production method, the CO is firstly added2Injecting a crude oil reservoir through an injection well; then electrifying the catalytic cathode and the inert anode; finally, CO is utilized as a catalytic cathode and an inert anode2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2The target product is used for displacing the crude oil, and the catalytic cathode and the inert anode are used for carrying out in-situ crude oil electrocatalytic cracking to improve the fluidity of the crude oil, so that the method can improve CO2The oil reservoir burying efficiency can also improve the recovery ratio of the oil reservoir, ensure the energy safety and reduce the emission of greenhouse gases.
In the above-mentioned CO2In one embodiment of the electroreductive sequestration and oil recovery method, with continued reference to FIG. 2, water and nanoparticles 208 may be mixed with CO2Simultaneously injecting the crude oil reservoir through an injection well, wherein the nano particles at least comprise particles made of the same material as the catalytic negative electrode, and the nano particles can be used for realizing the purpose of being contacted with CO when the distance between the two electrodes is larger2Ensures that the reaction is carried out more rapidly, and also mixes water and nanoparticles with CO2Simultaneously, before the crude oil reservoir is injected through the injection well, the method can also comprise the following steps:
with continued reference to FIG. 2, the CO is introduced using a high temperature, high pressure vessel 209 that simulates formation conditions2Water and nanoparticles into a mixed solution, so that as much CO as possible can be injected2And the nanoparticles allow the reaction to proceed faster, water being the solvent. In a further preferred embodiment, the nanoparticles may further include particles made of the same material as that of the inert positive electrode, so that the reaction rate of the negative electrode can be increased, and the positive electrode can be increasedThe polar reaction rate. After the nanoparticles are injected, the micro-nano-scale electrodes are injected into the oil reservoir, and once the electrodes are electrified, CO exists in the oil reservoir2The reaction rate is faster through the electro-reduction and crude oil cracking reaction.
Wherein the diameter of the nanoparticles may preferably be 10nm to 150nm, and the size of the nanoparticles can accelerate the reaction to allow CO to react2The electrode reacts more rapidly to obtain the target product, although other diameters can be selected according to actual needs, and are not limited herein.
In one specific example, when producing a low permeability reservoir, it may be at 10m3D to 20m3Injecting the mixed solution into the crude oil reservoir at a rate of/d;
when a fractured reservoir is produced, 10m3D to 15m3The velocity of/d injects the mixed solution into the crude reservoir.
Of course, this can be chosen according to the actual situation, and the speed is not limited here.
In the above-mentioned CO2In a preferred embodiment of the method for electroreductive sequestration and oil recovery, the mass fraction of nanoparticles in the mixed solution may preferably be 0.01% to 0.05%. In the above-mentioned CO2In a preferred embodiment of the electroreductive sequestration and oil recovery process, energizing the catalytic negative electrode and the inert positive electrode may comprise energizing the catalytic negative electrode and the inert positive electrode to a voltage gradient of 500.0V/m to 1000.0V/m.
It will be appreciated by those skilled in the art that the catalytic negative electrode may be a catalytic electrode targeted to methane, a catalytic electrode targeted to methanol, or a catalytic electrode targeted to formic acid, and the inert positive electrode may be a C electrode or a Pt electrode. In particular, the catalytic negative electrode may be a Cu electrode, the product of which may be an alcohol or a hydrocarbon including methanol, and CO may be introduced2The electro-reduction is methane, and can also be a Pb electrode, Hg electrode, In electrode, Sn electrode, Bi electrode, Cd electrode or Tl electrode, and the product can be formic acid or formate.
In the above-mentioned CO2Electroreduction buried andin a preferred embodiment of the oil recovery method, the catalytic negative electrode and the inert positive electrode have a diameter of 1cm to 6cm, and the electrodes of such large size are guaranteed to be CO2The contact area between the two is larger, so that the reaction rate is faster and more sufficient, and other sizes can be selected according to the actual perforation length of the oil well, and the size is not limited here, and further 5cm can be preferred.
Note that the existing CO2Sequestration and CO2In the displacement process, CO2The sequestration efficiency is only 30% -50%, and the CO is adopted2The mode of electroreduction and sequestration can greatly promote CO2The burying efficiency is even up to 70%.
Selecting a certain oil reservoir core to carry out a core displacement experiment, and comparing CO2Electroreduction displacement, CO2Displacement and formation water displacement vs. recovery and CO2The influence of the burial efficiency, the parameters are shown in table 1:
table 1 core physical properties parameters for displacement
FIG. 3 is a schematic diagram of the core recovery curves for different displacement systems, and from FIG. 3, it can be seen that the CO is relative to the formation water displacement mode2Electroreduction displacement can obviously improve the recovery ratio of the oil reservoir.
FIG. 4 shows CO2Displacement and CO2Electroreduction of displaced CO2Schematic of the sequestration efficiency, as can be seen from FIG. 4, with CO2During displacement, CO2The sequestration efficiency is about 45.6%, and CO is used2In the electroreduction mode, CO2The burying efficiency of the buried layer is as high as 70.4 percent.
To sum up, CO can be seen2The electric reduction mode can effectively improve CO2The sequestration efficiency and the oil reservoir recovery ratio have important practical significance for guaranteeing national energy safety and reducing emission of greenhouse gases.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. CO (carbon monoxide)2The method for electric reduction sequestration and oil recovery is based on a catalytic negative electrode and an inert positive electrode which are respectively connected to an injection well and a production well in the same communicated well group, and is characterized by comprising the following steps:
introducing CO2Injecting a crude oil reservoir through the injection well;
energizing the catalytic negative electrode and the inert positive electrode;
using the catalytic negative electrode and the inert positive electrode to CO2Performing in-situ electroreduction to remove CO2Conversion to the target product to CO2And the target product is used for displacing crude oil, and the catalytic cathode and the inert anode are also used for carrying out in-situ crude oil electrocatalytic cracking to improve the flowability of the crude oil.
2. CO according to claim 12The electroreduction sequestration and oil production method is characterized in that water and nano-particles are mixed with the CO2And injecting the crude oil reservoir through the injection well, wherein the nano particles at least comprise particles with the same material as the catalytic negative electrode.
3. CO according to claim 22The electroreduction sequestration and oil extraction method is characterized in that the nanoparticles also comprise particles made of the same material as the inert positive electrode.
4. CO according to claim 2 or 32The electroreduction sequestration and oil extraction method is characterized in that the diameter of the nano-particles is 10nm to 150 nm.
5. CO according to claim 22Electroreduction sequestration and oil recovery process characterized in that said water and nanoparticles are mixed with said CO2Prior to simultaneous injection into the crude oil reservoir through the injection well, further comprising:
CO generation using high temperature, high pressure vessels simulating formation conditions2Water and the nano particles are stirred into a mixed solution.
6. CO according to claim 52The electroreduction oil-burying and oil-extracting method is characterized by that when the low-permeability oil reservoir is exploited, it is worked out by 10m3D to 20m3Injecting the mixed solution into the crude oil reservoir at a rate of/d;
when a fractured reservoir is produced, 10m3D to 15m3The velocity of/d injects the mixed solution into the crude oil reservoir.
7. CO according to claim 52The electroreduction sequestration and oil recovery method is characterized in that the mass fraction of the nanoparticles in the mixed solution is 0.01-0.05%.
8. CO according to claim 12The electroreduction sequestration and oil production method is characterized in that the electrifying the catalytic cathode and the inert anode comprises the following steps:
and electrifying the catalytic negative electrode and the inert positive electrode until the voltage gradient is 500.0V/m to 1000.0V/m.
9. CO according to any of claims 1 to 82The electroreduction sequestration and oil extraction method is characterized in that the catalytic cathode is a catalytic electrode with a target product of methane, a catalytic electrode with a target product of methanol or a catalytic electrode with a target product of formic acid, and the inert anode is a C electrode or a Pt electrode.
10. CO according to claim 92Electric reduction buried layerThe oil storage and extraction method is characterized in that the diameters of the catalytic negative electrode and the inert positive electrode are 1 cm-6 cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116950620A (en) * | 2023-09-19 | 2023-10-27 | 江苏卫东机械有限公司 | Carbon dioxide oil extraction double-pump injection device and method |
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