CN110527498A - A kind of method that combustible ice is quickly subcooled nanometer liquefier and its exploits combustible ice - Google Patents

A kind of method that combustible ice is quickly subcooled nanometer liquefier and its exploits combustible ice Download PDF

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Publication number
CN110527498A
CN110527498A CN201910740700.7A CN201910740700A CN110527498A CN 110527498 A CN110527498 A CN 110527498A CN 201910740700 A CN201910740700 A CN 201910740700A CN 110527498 A CN110527498 A CN 110527498A
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combustible ice
ether
well
acid
nanometer
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冯文光
冯妍
冯卓
冯博
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Renshou Branch Of Chengdu Energy Materials Technology Development Co Ltd
Renshousheng Material Technology Co Ltd
One-Tenth Can Greenwood Scientific And Technological Development LLC
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Renshou Branch Of Chengdu Energy Materials Technology Development Co Ltd
Renshousheng Material Technology Co Ltd
One-Tenth Can Greenwood Scientific And Technological Development LLC
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Priority to CN201910740700.7A priority Critical patent/CN110527498A/en
Priority to PCT/CN2019/101549 priority patent/WO2021026947A1/en
Priority to RU2020112212A priority patent/RU2747127C1/en
Publication of CN110527498A publication Critical patent/CN110527498A/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/01Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells specially adapted for obtaining from underwater installations
    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16Enhanced recovery methods for obtaining hydrocarbons

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
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  • Separation By Low-Temperature Treatments (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

A kind of method that nanometer liquefier is quickly subcooled the invention discloses combustible ice and its exploits combustible ice, may be implemented safe and environment-friendly, cost-effective exploitation combustible ice, have excellent development prospect.Wherein, the component that nanometer liquefier includes following mass percent: the ammonium salt of 0%-25%, the acid of 0%-25%, the bleeding agent of 10%-80%, the amide of 0%-25%, the ester of 5%-70%, the ether of 2%-40%, the alcohol of 0%-35%, the ketone of 0%-25% and the aldehyde of 0%-35% is quickly subcooled in combustible ice.According to rock mineral composition select freezing point -200 DEG C~-10 DEG C, flash-point is high, rock dissolution rate is high, permeability increases, injection pressure is low, injection pressure drop fastly, individual well and group wells effectively be subcooleds that liquefaction distance and volume are big, supercooling liquefying speed is fast, safety and environmental protection liquefier, take the lead in fast implementing the inexpensive long-term production methane gas on a large scale of combustible ice in the whole world.

Description

A kind of method that combustible ice is quickly subcooled nanometer liquefier and its exploits combustible ice
Technical field
The present invention relates to combustible ice field of energy source developing technology, more particularly to a kind of combustible ice, which is quickly subcooled, to be received Rice liquefier and its method for exploiting combustible ice.
Background technique
Currently, the global conventional oil natural gas resource consumption contained is huge, faces exhaustion, it is badly in need of developing the new energy. And gas hydrates (Natural Gas Hydrate, abbreviation Gas Hydrate) i.e. combustible ice, it is distributed across absmal deposit In the permafrost of object or land-based area, by the crystalline material for the class ice-like that natural gas and water are formed under the conditions of high pressure low temperature, distribution Range is extremely wide.The evaluation result of scientist shows only in the distribution area of sea-bed area combustible ice just up to 40,000,000 squares Kilometer, accounts for the 1/4 of the earth ocean gross area.And at standard conditions, the gas hydrate dissociation of a unit volume is most It can produce the methane gas of 164 unit volumes.So the exploitation combustible ice energy can effectively solve petroleum resources exploitation at this stage Totally the problem of.
The researcher of the Massachusetts Institute of Technology has found recently: water being put into carbon nanotube, is tied in 151 DEG C of high temperature Ice.The diameter of carbon nanotube increases to 1.06nm from 1.05nm, and the freezing point of water can reduce tens degree.People are merely observed that cryogenically The combustible ice of layer, in fact, also having combustible ice in the nanometer slit that high temperature surpasses tight formation.
But since combustible ice is unstable at normal temperatures and pressures, there is no a kind of safety, mature combustible ice exploitation at present Method.Combustible ice recovery method is envisioned at present: thermal excitation extraction system, decompression extraction system and chemical reagent inject extraction system.It is first First, thermal excitation extraction system is directly to heat to gas hydrates layer, keeps the temperature of gas hydrates layer flat more than it Weigh temperature, so that promoting gas hydrate dissociation is water and gas extraction method, but this method is not yet fine so far Ground solves the problems, such as that efficiency of heating- utilization is lower, and can only carry out local heating, needs further perfect.Secondly, decompression fado Using sand decompression is taken out, methane gas can be produced by taking out sand decompression, but can only at most be exploited 6 months.Again, chemical reagent injection exploitation Method be by injecting certain chemical reagent, such as salt water, methanol, ethyl alcohol, ethylene glycol, glycerine into gas hydrates layer, The phase balance condition for destroying gas hydrates, promotes gas hydrate dissociation;Second two is used on mud combustible ice stratum Alcohol, glycerine can make clay swell block stratum, since methanol, ethyl alcohol flash-point are low, inflammable, unfavorable safety and environmental protection, and methanol, second Alcohol is not suitable for the high stratum of kaolin content;In addition, carbon dioxide replacement method is only used for the flammable of exploitation advanced stage slit development When ice stratum or combustible ice methane exploitation in debt.More frighteningly, after combustible ice produces, aerial, serious pollution is largely distributed Environment;On August 12nd, 2014, applicant have declared patent of invention " combustible ice supercooling liquefaction and nanometer slit decompression drop Solidifying agent SCD preparation method ", application number of invention patent 201410405050.8.On August 12nd, 2014, applicant, Patent of invention " the environmental protection united low pressure supercooled liquid production technique of combustible ice well pattern " is declared, application number of invention patent is 201410405049.5 on the July 11st, 2019 of Grant Patent Right for Invention notice.Thereafter it has been proposed that combustible ice solid Fluidisation or gas hydrates it is solids fluidized only liquefied mutation saying is subcooled, only consider freezing point temperature reduction, both do not had Consider combustible ice liquefaction is quickly subcooled, do not account for yet dissolution corrosion rock increase nanometer slit, do not account for more safety and environmental protection, The excessive deficit in stratum causes large area to collapse.The fact illustrates that supercooling liquefaction is more scientific.A large amount of extraction combustible ices, stratum are excessively in debt It causes large area to collapse, causes serious geology disaster.It is serious to destroy mankind's life if methane gas leakage is aerial in recovery process Dis environment.Therefore, the problem of how safe and environment-friendly, cost-effective exploitation combustible ice is those skilled in the art's urgent need to resolve.
Summary of the invention
In view of this, nanometer liquefier SCD is quickly subcooled the present invention provides a kind of combustible ice and utilizes its exploitation flammable Safe and environment-friendly, cost-effective exploitation combustible ice may be implemented in the method for ice, has excellent development prospect.Using the present invention Disclosed method exploits combustible ice, and combustible ice is made to liquefy in stratum original place, original place free methane gas, and free methane gas is from stratum Shaft bottom is flowed into, then flows to well head from shaft bottom, then flow into gas transmission line, inputs user, like recovering the oil as conventional gas, Combustible ice free methane gas is all transported in closed environment, be completely secured safe and environment-friendly, economical and effective produce it is flammable Ice methane gas.
To achieve the goals above, the present invention adopts the following technical scheme:
Nanometer liquefier is quickly subcooled in a kind of combustible ice, the component including following mass percent: the ammonium salt of 0%-25%, The acid of 0%-25%, the bleeding agent of 10%-80%, the amide of 0%-25%, the ester of 5%-70%, 2%-40% ether, 0%- The aldehyde of 35% alcohol, the ketone of 0%-25% and 0%-35%.
The beneficial effect of above-mentioned optimal technical scheme is: nanometer liquefaction is quickly subcooled in a kind of combustible ice disclosed by the invention Agent, being liquefied according to rock mineral composition, combustible ice supercooling, fastest, safety and environmental protection is most effective is selected, and realizes liquid Agent freezing point -200 DEG C~-10 DEG C, flash-point is high, combustible ice liquefying speed is most fast, combustible ice liquefaction volume is most, flammable aqualite Stone dissolution rate highest, straight joint expansion larynx are best, combustible ice rock permeability improves maximum, injection pressure is minimum in injection process, infuse Injection pressure decline is most fast during entering, injects effective supercooled liquid injects effective supercooled liquid apart from longest, individual well and group wells The maximum effect of volume, so as to efficiently produce combustible ice methane gas for safety and environmental protection.
Preferably, the ammonium salt includes ammonium fluoride, ammonium acid fluoride or the one such or a variety of combination of ammonium chloride;It is described Acid includes hydrochloric acid, hydrofluoric acid, propionic acid, isooctyl acid, aphthenic acids or the one such or a variety of combination of dodecyl benzene sulfonic acid;Institute Stating bleeding agent includes that bleeding agent fast T or bleeding agent JF be one such or two kinds of combination;The amide includes N, N- dimethyl Formamide or n,N-dimethylacetamide is one such or two kinds of combination.
Preferably, the fast T of the bleeding agent is disecoctylmaleate sodium sulfonate;The bleeding agent JF is polyoxy second Alkene fatty alcohol ether JFC, chemical structural formula C17~19H21O6(n=5).
Preferably, the ester includes butyl acrylate, diethyl phthalate, dibutyl phthalate, adjacent benzene two Formic acid dioctyl ester, diisooctyl phthalate, diethy-aceto oxalate, butyl acetate, acetic acid isoamyl rouge, diethyl malonate, cream Acid butyl ester, butyl methacrylate, ethyl cellosolve acetate, butyl glycol ether acetic acid esters, ethylene acetate, diethylene glycol (DEG) Butyl ether acetic acid esters, ethyl acetoacetate, butyl lactate, propylene glycol monomethyl ether propionic acid rouge, propylene glycol monomethyl ether acetic acid rouge, benzoic acid first Ester, ethyl benzoate, propyl benzoate, butyl benzoate, propene carbonate, propionic acid isoamyl rouge, butyl butyrate, isobutyl isobutyrate Ester, isovaleric acid isoamyl rouge, 1,4- butyrolactone, diethyl oxalate, ethylene sebacate, diethyl malonate, maleic acid diformazan Ester, glycerin diacetate, 1,2- propylene glycol carbonic ether, tributyl citrate, ethyl caprilate, propylene glycol methyl ether acetate, the third two Alcohol butyl ether acetic acid esters, isoamyl butyrate, iso-amyl iso-valeriate, ethanedioic acid dioctyl ester, dioctyl sebacate, glycerol triacetate, Isooctyl acrylate monomer, tributyl phosphate or the one such or a variety of combination of acetic acid 2- butoxyethyl.Preferably, the ether Including ethylene glycol monomethyl ether, ethylene glycol ethyl ether, butyl glycol ether, butyl cellosolve, glycol monobenzyl ether, propylene glycol monomethyl ether, third Glycol ether, propandiol butyl ether, diethylene glycol (DEG), diethyl carbitol, diethylene glycol dimethyl ether, butyl, propylene glycol first Ether, isoamyl ether, phenetole, butoxy benzene, benzene amyl ether, 1,3- butanediol -3- methyl ether, diethylene glycol ether or 1,2- propylene glycol-fourth The one such or a variety of combination of ether.Preferably, the alcohol includes methanol, ethyl alcohol, n-butanol, ethylene glycol, methyl-isobutyl Methanol, 2- hexanol, isoamyl alcohol, isobutanol, benzyl alcohol or the one such or a variety of combination of 1,2- propylene glycol.Preferably, institute Stating ketone includes N-Methyl pyrrolidone, cyclohexanone;The aldehyde is formaldehyde, citral, aldehyde C-9 or benzaldehyde.
The beneficial effect of above-mentioned optimal technical scheme is: nanometer liquefier is quickly subcooled in combustible ice disclosed by the invention, dodges Point is high, freezing point is low, combustible ice liquefying speed is fast, combustible ice liquefaction volume is more, combustible ice rock dissolution rate is high, straight joint expansion larynx is good, Combustible ice rock permeability improve injection pressure in big, injection process is low, injection pressure decline is fast, the effective supercooled liquid of injection away from Big from length, the effective supercooled liquid volume of injection, safety and environmental protection efficiently quickly produces combustible ice methane gas.
The use scope of nanometer liquefier is quickly subcooled in combustible ice disclosed by the invention: it is flammable to can be used for continent permafrost Ice, the deep water combustible ice of inland lake, the slope mud combustible ice on island, bottom silt combustible ice, marine rock combustible ice etc. are opened Adopt combustible ice;And liquefaction is quickly subcooled in the combustible ice that can be also used for high-temperature stratum nanometer slit.It can be stored up according to combustible ice The Minerals And Rocks of layer are suitble to super fine and close coal petrography, mud stone, mud, shale, sandstone, conglomerate, carbonate rock, igneous rock etc. at assignment system Low temperature combustible ice and the quick supercooled liquid of nanometer slit high temperature combustible ice.
The invention also discloses a kind of injection liquid for combustible ice exploitation, including a kind of combustible ice as described above are quick Nanometer liquefier is subcooled;It further include sodium chloride or potassium chloride, HCl, HF and water.
Preferably, the component including following mass percent: 0.8%-1.5% such as claim 1~6 any one institute Nanometer liquefier, 0%-5% sodium chloride or potassium chloride, 0%-5%HCl, 0%-3%HF is quickly subcooled in a kind of combustible ice stated And excess water;The water includes seawater, river water or tap water.
The present invention also provides a kind of combustible ice recovery methods to specifically include following step using injection liquid as described above It is rapid:
(1) combustible ice Mining Test area drilling well:
The block for selecting flammable ice reserves big starts as combustible ice Mining Test area in combustible ice Mining Test district center Well spacing surrounds centerwell up time by five-spot, 7 methods, 9 methods, inverted five spot method, anti-7 methods or inverted nine spot water flooding pattern well pattern Needle or counterclockwise circulation progress drilling well;
Island slope mud combustible ice is along the drilling well of island slope;Five-spot is that centerwell is gas recovery well, 4 mouthfuls of remaining periphery well For water injection well, 7 methods, 9 methods and so on;Inverted five spot method is that centerwell is water injection well, and 4 mouthfuls of remaining periphery well is gas production Well, anti-7 methods, anti-9 methods and so on;Bottom silt combustible ice drilling straight-hole, below combustible ice bottom or bottom 2 meters with On horizon d perforation, since the methane gas that the raw pressure drop of underflow movable property forces supercooling liquefaction free flows downwardly into firm base In rock stratum, then pit shaft is flowed into, flow into gas pipeline, prevents bottom silt collapsing from causing supercooling liquefied methane is free to be diffused into seawater In, polluted seawater, or even pollution air;Island slope mud combustible ice off-angle drilling, inclined shaft is in island slope mud combustible ice It is below slope and parallel with slope, at least 2 meters or more below the slope of inclined shaft and island slope mud combustible ice, preferably on slope The bottom below hard density perforation, ramp portion preferably not perforation or few perforation, or first in bottom perforation, bottom can Gradually upward perforation after combustion ice has been adopted, because the methane gas that the raw pressure drop of underflow movable property forces supercooling liquefaction free flows downwardly into Pit shaft;Other kinds of combustible ice is in the middle part of combustible ice reservoir routinely natural gas well density perforation;
(2) combustible ice Mining Test area is injected entirely:
Injection such as above-mentioned injection liquid in the above-mentioned well drilled through are started the cycle over from center;
(3) the full pilot production in combustible ice Mining Test area:
Well after step (2) inject injection liquid is pressed into natural gas pilot production standard pilot production methane gas;
(4) combustible ice Mining Test area note adopts the stage:
Using the above-mentioned centerwell drilled through according to five-spot, 7 methods or 9 methods as gas recovery well, gas recovery well all around around Well as water injection well;Or using it is above-mentioned according to inverted five spot method, the centerwell of anti-7 methods or anti-9 methods drilled through is as note Well, water injection well all around around well as gas recovery well;Water injection well is injected as described in claim 7 or 8 by oil-field flooding standard Injection liquid, gas recovery well by natural gas pilot production standard exploit methane, until it can not adopt methane gas;
(5) carbon dioxide injection produces methane:
Water injection well is exploited by oil-field flooding standard injection liquid or gaseous carbon dioxide, gas recovery well by natural gas pilot production standard Methane, until it can not adopt methane gas.
Preferably, injection rate=π × [(0.25-0.35) well spacing] of liquid is injected described in step (2) each well2× reservoir is thick Degree × porosity.
The beneficial effect of above-mentioned optimal technical scheme is: it is permanent that combustible ice recovery method disclosed by the invention can be used for continent Frozen soil combustible ice, the deep water combustible ice of inland lake, the slope mud combustible ice on island, bottom silt combustible ice, marine rock can Fire the exploitation low temperature combustible ice such as ice;Can be used for super fine and close coal petrography, mud stone, mud, shale, sandstone, conglomerate, carbonate rock, The rocks formation production combustible ice such as igneous rock;It can be used for the quick supercooled liquid of combustible ice of the extra small nanometer slit of high-temperature stratum Change, exploits extra small nanometer slit high temperature combustible ice.The phase injects carbon dioxide to method disclosed by the invention after mining, due to first The molecular diameter 0.38nm of alkane, the molecular diameter 0.34nm of carbon dioxide pass through liquid using carbon dioxide replacement residue methane Remaining combustible ice first is greatly improved in carbon dioxide shrinkage seam, carbon dioxide volume expansion seam and carbon dioxide replacement methane The production efficiency of alkane gas;And carbon dioxide replacement methane is used, firm carbon dioxide hydrate is generated on stratum, fills up first Deficit after alkane extraction, carbon dioxide hydrate is more firm than methane hydrate, and stratum is made not collapse, after protection combustible ice exploitation Ground environment, advantageous safety and environmental protection.
It can be seen via above technical scheme that compared with prior art, the present disclosure provides a kind of combustible ice is quick The method that nanometer liquefier is subcooled and exploits combustible ice, has the following beneficial effects:
(1) nanometer liquefier is quickly subcooled in combustible ice disclosed by the invention, and molecular weight easily enters nanometer slit less than 500; Flash-point is greater than 71 DEG C, has non-flammable, has non-explosion hazard, prevents rock expansion, prevents rock sensitivity, inhibits sodium swelling Soil, kaolinite, illite, chlorite expansion;Inhibition rock water-sensitive, speed is quick, acid-sensitive, alkali is quick, stress sensitive;The dissolution of rock height Property, straight joint expands larynx, and being introduced into big slit dissolves cement, charges in big slit, links up big slit, gradually enters nano-pore Seam dissolves cement, charges in nanometer slit, links up nanometer slit, dissolve nano-pore slotted wall face, expands nanometer slit; Improve permeability;For freezing point at -200 DEG C~-10 DEG C, freezing point is lower, and it is faster to improve supercooling liquefying speed.
(2) liquefier disclosed by the invention can make combustible ice supercooling liquefaction, and seabed combustible ice is in pressure 30MPa, sea The freezing point of bottom combustible ice is 2 DEG C or so, i.e., is likely to become liquid when bottom-water temperature is greater than 2 DEG C;And liquefier is subcooled can will be extra large The freezing point of bottom combustible ice is moved to -200 DEG C~-10 DEG C, even if bottom-water temperature is constant, due to freezing point to supercooling direction be moved to - 200 DEG C~-10 DEG C, seabed combustible ice quickly becomes liquid from solid under same temperature, pressure environment, and solid-state methane becomes free State methane;Supercooling nanometer liquefier can make combustible ice fast liquefying, and due to liquefier low freezing point, one contacts combustible ice liquid immediately Change, supercooling nanometer liquefier low molecule, which enters in the nanometer slit of combustible ice, to liquefy rapidly.
(4) nanometer liquefier and HCl, HF and seawater etc. is quickly subcooled in combustible ice disclosed by the invention to complement each other to form Liquid is injected, permeability improves, to promote in its injection process that injection pressure is low, injection pressure decline is fast;And due to permeability It improves, can promote to liquefy, make volume increase of liquefying, efficient liquefaction distance improves, and liquefaction volume increases.
(5) method disclosed by the invention is liquefied using fast volume, and carbon dioxide replacement promotes recovery ratio height;Inject liquid With high-flash, non-flammable, non-explosion hazard, ensure that using safe;Combustible ice Stratigraphic liquidation free methane, only stratum, It is flowed in pit shaft, pipeline, never in leakage atmosphere, guarantees production safety;Carbon dioxide injection is replaced after development late stage formation depletion, Solid carbon dioxide hydrate is generated, formation damage more stronger than original methane hydrate has safety and environmental protection;Together Shi Caiyong carbon dioxide replacement, secured stratum, the danger for reducing Tectonic earthquake.
(6) recovery method disclosed by the invention has extensive adaptability, is not only applicable to big slit low temperature combustible ice, and adapt to In extra small nanometer slit high temperature combustible ice;The recovery method of the combustible ice is not only applicable to ocean mud combustible ice, and is adapted to sea Foreign marine rock combustible ice is also adapted to island slope combustible ice, is equally applicable to land dirt band layer combustible ice;It is right simultaneously It is all adapted in the combustible ice of the formation rocks such as coal petrography, mud stone, shale, sandstone, conglomerate, carbonate rock, igneous rock.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation Example is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common Technical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protects It encloses.
Embodiment 1:
The embodiment of the present invention 1 discloses a kind of combustible ice and nanometer liquefier SCD1 is quickly subcooled, and the technical solution of use is such as Under:
Nanometer liquefier SCD1 is quickly subcooled in a kind of combustible ice, by mass percentage, by following weight percent composition Composition: 10% ammonium acid fluoride, 5% propionic acid, the fast T of 5% bleeding agent, 8% bleeding agent JF, 12% butyl acetate, 5% phthalic acid Diethylester, 5% diethy-aceto oxalate, 5% propionic acid diethylester, 5% butyl, 5%N- methyl pyrrolidone, 5% the third two Alcohol methyl ether, 5% n-butanol, 5% propene carbonate, 5% ethyl cellosolve acetate and 15% formaldehyde.The fast T of bleeding agent is along fourth Enedioic acid di-sec-octyl sodium sulfonate;Bleeding agent JF is polyoxyethylene aliphatic alcohol ether JFC, chemical structural formula C17~19H21O6(n =5).
The embodiment of the present invention 1 realizes that freezing point is fast at -60~-10 DEG C for the sandstone combustible ice liquefaction based on quartz Speed supercooling liquefaction.
Embodiment 2:
The embodiment of the present invention 2 discloses a kind of combustible ice and nanometer liquefier SCD2 is quickly subcooled, and the technical solution of use is such as Under:
Nanometer liquefier SCD2 is quickly subcooled in a kind of combustible ice, by mass percentage, is grouped as by following group: 22% seeps The saturating fast T of agent, 16% diethylene glycol acetic acid esters, 16% acetic acid isoamyl rouge, 12% diethylene glycol dimethyl ether, 5% propene carbonate, 8% diethylene glycol (DEG), 8% butyl acetate, 8% ethyl benzoate, 3% ethyl acetoacetate and 2% diethyl phthalate.Infiltration The fast T of agent is disecoctylmaleate sodium sulfonate.
The embodiment of the present invention 2 is adapted to using sodium bentonite as the quartzy sandstone combustible ice liquefaction based on charges, cement Process realizes that freezing point liquefies in -60~-10 DEG C of quick supercooling.
Embodiment 3:
The embodiment of the present invention 3 discloses a kind of combustible ice and nanometer liquefier SCD3 is quickly subcooled, and the technical solution of use is such as Under:
Nanometer liquefier SCD3 is quickly subcooled in a kind of combustible ice, by mass percentage, is grouped as by following group: 5% chlorine Change ammonium, 14% hydrochloric acid, the fast T of 18% bleeding agent, 18% bleeding agent JF, 24% diethylene glycol (DEG), 8% n-butanol, 8% ethyl acetoacetate With 5% cyclohexanone.The mass concentration of hydrochloric acid is 31%;The fast T of bleeding agent is disecoctylmaleate sodium sulfonate;Bleeding agent JF is polyoxyethylene aliphatic alcohol ether JFC, chemical structural formula C17~19H21O6(n=5).
The embodiment of the present invention 3 is adapted to liquefy by the quartzy sandstone combustible ice based on charges, cement of kaolinite Journey realizes freezing point in -60~-10 DEG C of quickly supercooling liquefaction.
Embodiment 4:
The embodiment of the present invention 4 discloses a kind of combustible ice and nanometer liquefier SCD4 is quickly subcooled, and the technical solution of use is such as Under:
Nanometer liquefier SCD4 is quickly subcooled in a kind of combustible ice, by mass percentage, is grouped as by following group: 12% the third Acid, the fast T of 8% bleeding agent, 8% bleeding agent JF, 8% diethyl phthalate, 8% diethy-aceto oxalate, 8% diethylene glycol fourth Ether, 6% methanol, 10%N- methyl pyrrolidone, 8% ethylene glycol ethyl ether, 8% propylene glycol monomethyl ether, 8% n-butanol and 8% acetyl Ethyl acetate.The fast T of bleeding agent is disecoctylmaleate sodium sulfonate;Bleeding agent JF is polyoxyethylene aliphatic alcohol ether JFC, Chemical structural formula is C17~19H21O6(n=5).
The embodiment of the present invention 4 is adapted to liquefy by the quartzy sandstone combustible ice based on charges, cement of illite Journey realizes freezing point in -60~-10 DEG C of quickly supercooling liquefaction.
Embodiment 5:
The embodiment of the present invention 5 discloses a kind of combustible ice and nanometer liquefier SCD5 is quickly subcooled, and the technical solution of use is such as Under:
Laboratory fill out sand tube methane combustible ice is generated by 95% quartzy+5% chlorite, and nanometer is quickly subcooled in a kind of combustible ice Liquefier SCD5 is grouped as by following group by mass percentage: 4% hydrofluoric acid, 26% [31% hydrochloric acid], 18% propionic acid, The fast T of 12% bleeding agent, 12% bleeding agent JF, 4%N, N- dimethyl acetamide, 4% diethylene glycol (DEG), 4% diethylene glycol dimethyl ether, 4% methanol, 4%N- methyl pyrrolidone, 4% cyclohexanone and 4% n-butanol.The mass concentration of hydrofluoric acid is 40%, hydrochloric acid Mass concentration is 31%;The fast T of bleeding agent is disecoctylmaleate sodium sulfonate;Bleeding agent JF is polyoxyethylene aliphatic alcohol ether JFC, chemical structural formula C17~19H21O6(n=5).
The embodiment of the present invention 5 is adapted to liquefy by the quartzy sandstone combustible ice based on charges, cement of chlorite Journey realizes freezing point in 60 DEG C~-10 DEG C quickly supercooling liquefaction.
Embodiment 6:
The embodiment of the present invention 6 discloses a kind of combustible ice and nanometer liquefier SCD6 is quickly subcooled, and the technical solution of use is such as Under:
25% Isooctyl acrylate monomer, 25% tributyl phosphate, 20% propylene-glycol ethyl ether, 12% butyl glycol ether acetic acid esters and 6% butyl.
The embodiment of the present invention 6 is adapted to bottom silt combustible ice more than cold liquefaction process, realize freezing point -200 DEG C~- It is more than cold liquefaction that 60 DEG C supper-fast.The embodiment 6 is preferably used in combustible ice early stage exploitation, the exploitation of bottom silt combustible ice or island Slope mud combustible ice etc. need place or the period of supper-fast exploitation.
The preparation method of nanometer liquefier is quickly subcooled in a kind of combustible ice disclosed in the embodiment of the present invention 1~6 specifically: root According to selected formula, it is packed into blender by the up to minimum sequence of component density, stirs, is packed on one side on one side, stir 40min- 150min measures barrelling and goes out product after being completely dissolved.
Embodiment 7
Quartzy fill out sand tube methane combustible ice is kept for -10 DEG C, is replaced with 1%SCD1+99% water drive, displacement pressure decline 2.6MPa displaces 10.9cm3Methane gas, displacement efficiency 59.9%.
Embodiment 8
Quartzy sodium bentonite fill out sand tube methane combustible ice is kept for -10 DEG C, is replaced with 1%SCD2+99% water drive, under displacement pressure 2.8MPa is dropped, 11.8cm is displaced3Methane gas, displacement efficiency 62.8%.
Embodiment 9
Quartzy kaolinite fill out sand tube methane combustible ice is kept for -10 DEG C, is replaced with 1%SCD3+99% water drive, displacement pressure decline 2.3MPa displaces 11.0cm3Methane gas, displacement efficiency 59.1%.
Embodiment 10
Quartzy illite fill out sand tube methane combustible ice is kept for -10 DEG C, is replaced with 1%SCD4+99% water drive, displacement pressure decline 2.8MPa displaces 11.2cm3Methane gas, displacement efficiency 60.9%.
Embodiment 11
Quartzy chlorite fill out sand tube methane combustible ice is kept for -10 DEG C, is driven with 1%SCD5+92% water+5%KCl+2%HCl It replaces, displacement pressure declines 2.6MPa, displaces 11.1cm3Methane gas, displacement efficiency 58.7%.
Embodiment 12
Quartzy fill out sand tube methane combustible ice is kept for -10 DEG C, is replaced with 1%SCD6+99% water drive, displacement pressure decline 2.0MPa displaces 14.4cm3Methane gas, displacement efficiency 77.8%.
Embodiment 13 calculates displacement efficiency
1, laboratory fill out sand tube methane combustible ice generation method are as follows:
The first step is stirred evenly using 30% butyl+water, is fitted into graduated 2000 milliliters of glasses, if dress Entering volume is VWater.The back-off of graduated 1000 milliliters of glasses is put into 2000 milliliters of glasses equipped with methane lytic agent. Methane is input into 1000 milliliters of glasses of back-off with degassing method, the methane gas for writing down input is paid attention to, waits until methane always Until when almost no longer dissolving (methane in 1000 milliliters of glasses of back-off is no longer reduced), the methane total amount of dissolution is determined VMethane, calculate Methane solubility R=VMethane/VWater
Second step measures dissolved methane volume total amount Q1 in fill out sand tube.Fill out sand tube sand grains can be directly used true flammable The sand grains that ice formation rock is worn into, can also be by subterranean minerals at the sand grains of assignment system.First sand grains is packed into fill out sand tube and determines volume, The solvent of dissolved methane is poured slowly into sand grains, until all wet, determines the solvent for invading the dissolved methane of drenched sand grains Volume VIt is wet, dissolved methane volume total amount Q1=V in fill out sand tubeIt is wetR。
Third step generates fill out sand tube methane combustible ice.The methane lytic agent of dissolved methane is mixed with fill out sand tube sand grains It is even, it is packed into fill out sand tube compacting.Fill out sand tube outer packing is very thick to be invaded drenched cotton or cloth by water completely.It is put into refrigerator or freezing Cabinet is put 2-3 days, and fill out sand tube methane combustible ice is generated.
2, the disclosed injection liquid of the embodiment of the present invention 6~12 is respectively adopted to carry out in fact the fill out sand tube combustible ice being prepared Room supercooling liquefaction displacement is tested, method particularly includes:
Fill out sand tube combustible ice always constant temperature at 0 DEG C hereinafter, injection liquid pair is respectively adopted disclosed in the embodiment of the present invention 6~12 The fill out sand tube combustible ice being prepared carries out laboratory supercooling liquefaction displacement, and the methane tolerance displaced is collected with water pumping gas production method Q2。
3, extraction methane displacement efficiency is calculated, obtained result is as shown in table 1 below, method particularly includes:
The methane tolerance Q2 for collecting displacement extraction with water pumping gas production method, multiplied by 100%, obtains the fill out sand tube methane divided by Q1 The displacement efficiency of combustible ice.
Table 1
Q2 Q1 Displacement efficiency %
Embodiment 7 10.9 18.2 59.9
Embodiment 8 11.8 18.8 62.8
Embodiment 9 11.0 18.6 59.1
Embodiment 10 11.2 18.4 60.9
Embodiment 11 11.1 18.9 58.7
Embodiment 12 14.4 18.5 77.8
1 experimental data of table absolutely proves that method disclosed by the invention has technical effect outstanding.
Embodiment 14
A kind of combustible ice recovery method, the injection liquid stated using such as embodiment 7~12, is specifically comprised the following steps:
(1) combustible ice Mining Test area drilling well:
The block for selecting flammable ice reserves big starts as combustible ice Mining Test area in combustible ice Mining Test district center Well spacing surrounds centerwell up time by five-spot, 7 methods, 9 methods, inverted five spot method, anti-7 methods or inverted nine spot water flooding pattern well pattern Needle or counterclockwise circulation progress drilling well;
(2) combustible ice Mining Test area is injected entirely:
Injection liquid of the injection as described in embodiment 7~12 in the above-mentioned well drilled through is started the cycle over from center;In each well Inject injection rate=π × [(0.25-0.35) well spacing] of liquid2× reservoir thickness × porosity.
(3) the full pilot production in combustible ice Mining Test area:
Well after step (2) inject injection liquid is pressed into SY/T 6171-1995 gas reservoir pilot production technical specification standard pilot production Methane gas;
(4) combustible ice Mining Test area note adopts the stage:
Using the above-mentioned centerwell drilled through according to five-spot, 7 methods or 9 methods as gas recovery well, gas recovery well all around around Well as water injection well;Or using it is above-mentioned according to inverted five spot method, the centerwell of anti-7 methods or anti-9 methods drilled through is as note Well, water injection well all around around well as gas recovery well;Water injection well presses oil field SY/T 4122-2012 oil-field flooding engineering construction Technical specification injects the injection liquid as described in embodiment 7~12, and gas recovery well presses SY/T 6171-1995 gas reservoir pilot production technical specification Standard exploits methane, until it can not adopt methane gas;
(5) carbon dioxide injection produces methane:
Water injection well presses SY/T 6171-1995 gas reservoir by oil-field flooding standard injection liquid or gaseous carbon dioxide, gas recovery well Pilot production technical specification standard exploits methane, until it can not adopt methane gas.
Combustible ice prepared by the present invention is quickly subcooled nanometer liquefier SCD and has both low molecule, low freezing point, prevent swollen anti-anaphylaxis, is molten Solution rock, straight joint expansion larynx, the liquefaction of supercooling fast volume, methane quickly dissociate.
Nanometer liquefier SCD is quickly subcooled in combustible ice prepared by the present invention, and product is easy to produce.
The present invention proposes that laboratory generates fill out sand tube combustible ice, easy to operate.
The present invention propose handle up method exploitation combustible ice methane gas method, it is simple and convenient.Early stage producing well and injection well are all It handles up and adopts methane.Water injection well early metaphase infuses SCD, and injection pressure drops fastly, efficient liquefaction distance;The displacement of advanced stage carbon dioxide injection is adopted Methane and secured stratum, safety and environmental protection.This patent is widely applicable to the various rock low temperature combustible ices in seabed land and extra small nanometer High temperature combustible ice in the slot of hole, application range are extremely wide.
The preparation method of nanometer liquefier SCD is quickly subcooled in combustible ice of the present invention, combustible ice supercooled liquid melts and adopts methane Method, demand is big, market is big, required time has persistence.A kind of combustible ice be quickly subcooled nanometer liquefier SCD have it is wide General practicability can in high volume be organized to produce, and it is flammable to meet the whole nation, whole world low temperature combustible ice and extra small nanometer slit high temperature The great demand of ice, a kind of combustible ice are quickly subcooled nanometer liquefier SCD and pass through to the energy strategy of country, energy demand, the energy Ji influence is extremely great, and economic benefit, social benefit are all difficult to the appraisal.Nanometer liquefier is quickly subcooled in a kind of combustible ice SCD has wide applicability, can in high volume organize to produce.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For device disclosed in embodiment For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part It is bright.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims (10)

1. nanometer liquefier SCD is quickly subcooled in a kind of combustible ice, which is characterized in that the component including following mass percent: The ammonium salt of 0%-25%, the acid of 0%-25%, the bleeding agent of 10%-80%, the amide of 0%-25%, 5%-70% ester, The ether of 2%-40%, the alcohol of 0%-35%, the ketone of 0%-25% and the aldehyde of 0%-35%.
2. nanometer liquefier is quickly subcooled in a kind of combustible ice according to claim 1, which is characterized in that the ammonium salt includes Ammonium fluoride, ammonium acid fluoride or the one such or a variety of combination of ammonium chloride;The acid includes hydrochloric acid, hydrofluoric acid, propionic acid, different pungent Acid, aphthenic acids or the one such or a variety of combination of dodecyl benzene sulfonic acid;The bleeding agent includes the fast T of bleeding agent or infiltration Agent JF is one such or two kinds of combination;The amide include n,N-Dimethylformamide or n,N-dimethylacetamide wherein One or two kinds of combinations.
3. nanometer liquefier is quickly subcooled in a kind of combustible ice according to claim 1, which is characterized in that the ester includes third Olefin(e) acid butyl ester, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, phthalic acid two are different pungent Ester, diethy-aceto oxalate, butyl acetate, acetic acid isoamyl rouge, diethyl malonate, butyl lactate, butyl methacrylate, ethylene glycol Ether acetate, butyl glycol ether acetic acid esters, ethylene acetate, butyl carbitol acetate, ethyl acetoacetate, lactic acid Butyl ester, propylene glycol monomethyl ether propionic acid rouge, propylene glycol monomethyl ether acetic acid rouge, methyl benzoate, ethyl benzoate, propyl benzoate, benzene first Acid butyl ester, propene carbonate, propionic acid isoamyl rouge, butyl butyrate, isobutyl isobutyrate, isovaleric acid isoamyl rouge, 1,4- butyrolactone, second Diethyl adipate, ethylene sebacate, diethyl malonate, dimethyl maleate, glycerin diacetate, 1,2- propylene glycol carbonic acid Rouge, tributyl citrate, ethyl caprilate, propylene glycol methyl ether acetate, propandiol butyl ether acetic acid esters, isoamyl butyrate, isovaleric acid Isopentyl ester, ethanedioic acid dioctyl ester, dioctyl sebacate, glycerol triacetate, Isooctyl acrylate monomer, tributyl phosphate or acetic acid 2- The one such or a variety of combination of butoxyethyl.
4. nanometer liquefier is quickly subcooled in a kind of combustible ice according to claim 1, which is characterized in that the ether includes second Glycol methyl ether, ethylene glycol ethyl ether, butyl glycol ether, butyl cellosolve, glycol monobenzyl ether, propylene glycol monomethyl ether, propylene glycol second Ether, propandiol butyl ether, diethylene glycol (DEG), diethyl carbitol, diethylene glycol dimethyl ether, butyl, propylene glycol monomethyl ether, isoamyl Ether, phenetole, butoxy benzene, benzene amyl ether, 1,3 butylene glycol -3- methyl ether, diethylene glycol ether or 1,2- propylene glycol-butyl ether are therein One or more combinations.
5. nanometer liquefier is quickly subcooled in a kind of combustible ice according to claim 1, which is characterized in that the alcohol includes first Alcohol, ethyl alcohol, n-butanol, ethylene glycol, methyl isobutyl carbinol, 2- hexanol, isoamyl alcohol, isobutanol, benzyl alcohol or 1,2- propylene glycol One such or a variety of combination.
6. nanometer liquefier is quickly subcooled in a kind of combustible ice according to claim 1, which is characterized in that the ketone includes N- Methyl pyrrolidone, cyclohexanone;The aldehyde is formaldehyde, citral, aldehyde C-9 or benzaldehyde.
7. a kind of injection liquid for combustible ice exploitation, which is characterized in that including as described in claim 1~6 any one Nanometer liquefier is quickly subcooled in a kind of combustible ice;It further include sodium chloride or potassium chloride, HCl, HF and water.
8. a kind of injection liquid for combustible ice exploitation according to claim 7, which is characterized in that including following quality hundred Divide the component of ratio: nano fluid is quickly subcooled in a kind of combustible ice as described in claim 1~6 any one of 0.8%-1.5% Agent, 0%-5% sodium chloride or potassium chloride, 0%-5%HCl, 0%-3%HF and excess water;The water include seawater, river water or Tap water.
9. a kind of combustible ice recovery method, which is characterized in that using as claimed in claim 7 or 8 injection liquid, specifically include as Lower step:
(1) combustible ice Mining Test area drilling well:
The block for selecting flammable ice reserves big starts cloth as combustible ice Mining Test area, in combustible ice Mining Test district center Well, it is clockwise around centerwell by five-spot, 7 methods, 9 methods, inverted five spot method, anti-7 methods or inverted nine spot water flooding pattern well pattern Or circulation carries out drilling well counterclockwise;
(2) combustible ice Mining Test area is injected entirely:
It is started the cycle over from center and injects injection liquid as claimed in claim 7 or 8 in the above-mentioned well drilled through;
(3) the full pilot production in combustible ice Mining Test area:
Well after step (2) inject injection liquid is pressed into natural gas pilot production standard pilot production methane gas;
(4) combustible ice Mining Test area note adopts the stage:
Using the above-mentioned centerwell drilled through according to five-spot, 7 methods or 9 methods as gas recovery well, gas recovery well all around around well As water injection well;Or using it is above-mentioned according to inverted five spot method, the centerwell of anti-7 methods or anti-9 methods drilled through as water injection well, Water injection well all around around well as gas recovery well;Water injection well is by oil-field flooding standard injection injection as claimed in claim 7 or 8 Liquid, gas recovery well exploits methane by natural gas pilot production standard, until it can not adopt methane gas;
(5) carbon dioxide injection produces methane:
Water injection well exploits first by natural gas pilot production standard by oil-field flooding standard injection liquid or gaseous carbon dioxide, gas recovery well Alkane, until it can not adopt methane gas.
10. a kind of combustible ice recovery method according to claim 9, which is characterized in that injected described in step (2) each well Injection rate=π of liquid × [(0.25-0.35) well spacing]2× reservoir thickness × porosity.
CN201910740700.7A 2019-08-12 2019-08-12 A kind of method that combustible ice is quickly subcooled nanometer liquefier and its exploits combustible ice Pending CN110527498A (en)

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