CN108435154A - A kind of oil shale in-situ exploitation catalyst and its application method - Google Patents
A kind of oil shale in-situ exploitation catalyst and its application method Download PDFInfo
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- CN108435154A CN108435154A CN201710082567.1A CN201710082567A CN108435154A CN 108435154 A CN108435154 A CN 108435154A CN 201710082567 A CN201710082567 A CN 201710082567A CN 108435154 A CN108435154 A CN 108435154A
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- 239000004058 oil shale Substances 0.000 title claims abstract description 125
- 239000003054 catalyst Substances 0.000 title claims abstract description 85
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 45
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims abstract description 50
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims abstract description 25
- 235000019341 magnesium sulphate Nutrition 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000002347 injection Methods 0.000 claims description 22
- 239000007924 injection Substances 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 27
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 67
- 238000000197 pyrolysis Methods 0.000 description 21
- 229930195733 hydrocarbon Natural products 0.000 description 11
- 150000002430 hydrocarbons Chemical class 0.000 description 11
- 239000011435 rock Substances 0.000 description 10
- 239000000243 solution Substances 0.000 description 7
- 241000209094 Oryza Species 0.000 description 6
- 235000007164 Oryza sativa Nutrition 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 235000009566 rice Nutrition 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003079 shale oil Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000011949 solid catalyst Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007233 catalytic pyrolysis Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 239000010699 lard oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 239000003863 metallic catalyst Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052961 molybdenite Inorganic materials 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/10—Magnesium; Oxides or hydroxides thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/02—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by cracking a single hydrocarbon or a mixture of individually defined hydrocarbons or a normally gaseous hydrocarbon fraction
- C07C4/06—Catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/845—Compositions based on water or polar solvents containing inorganic compounds
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2521/00—Catalysts comprising the elements, oxides or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium or hafnium
- C07C2521/10—Magnesium; Oxides or hydroxides thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Catalysts (AREA)
Abstract
The present invention relates to a kind of oil shale in-situ exploitation catalyst and its application methods.The catalyst includes magnesium sulfate and water, and the mass ratio of magnesium sulfate and water is 1:(100‑1000).The application method of the catalyst is：Before oil shale in-situ conversion exploitation, carry out the seam transformation of oil shale ore bed, then catalyst solution of the present invention is injected in improved oil shale ore bed, it is heated to 340 380 DEG C, constant temperature is kept for 48 days, oil channel is opened, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.Catalyst of the present invention can reduce the oil outlet temperature of oil shale in-situ exploitation, improve out oil gas rate, realize energy-saving consumption-reducing, reduce oil shale in-situ conversion exploitation production cost.
Description
Technical field
The invention belongs to oil shale recovery technical fields, and in particular to a kind of oil shale in-situ exploitation catalyst and its make
Use method.
Background technology
Usual oil shale resources of the buried depth less than 300m can be transported to destructive distillation factory lard oil shale oil by strip mining transformation；
And oil shale of the buried depth more than 300m is suitable for, using to oil shale layer In Situ Heating, being converted into oil shale oil and being exploited.State
The current longer oil shale in-situ of run time heats destructive distillation liquefaction technology on border, with the ICP (In-suit of the Shell Oil Company
Conversion Process) technology is the most ripe.Although having developed fluid heating, radio frequency heating, microwave again in recent years
The technologies such as heating, but majority is limited to conceptual model experimental stage, and the commercial Application from real practical scale is far away.
Converted in-situ is exploited compared with the retorting technique of ground, it is not necessary to which the oil shale ore of underground is excavated to ground
Oil shale oil is obtained, but needs the high temperature that oil shale layer is heated to 500 DEG C that could be pyrolyzed to obtain oil shale oil in conversion process,
Energy consumption is huge, and the macromolecule hydrocarbon export rate of generation is slow, and simultaneously second pyrolysis easily occurs for the easy coking of organic matter so that oily page
The conversion rate and recovery rate of shale oil reduce.Catalyst, which can change, chemically reacts required activation energy in reaction process, to
Change reaction rate, accelerate reaction progress.By adding the required temperature of catalyst degradation oil shale in-situ oil gas conversion, improving
Oil gas product qualities convert a kind of industrialized direction at oil shale in-situ.Simultaneously compared with non-catalytic pyrolysis, catalysis pyrolysis
Oil shale oily yield can also be improved, oil shale pyrolysis conversion ratio is improved.
Currently, oil shale is catalyzed Study on Pyrolysis primarily directed to ground retorting technique, can be divided by type:1. clay pit
Object, inorganic salts etc.；2. metallic catalyst, mainly Fe, Co, Mo, Ni catalyst；3. metal oxide, sulfide and halogenation
Object catalyst, such as ZnCl2、MoS2Deng；4. molecular sieve catalyst, such as ZSM-5 Series Molecules sieve, Y type molecular sieve.
Although catalyst plays an important role in oil shale oil gas conversion process, these current catalyst are main
It is to be based on ground retorting technique, and catalyst is mostly solid catalyst.For the conversion exploitation of oil shale in-situ oil gas, toward ground
Lower addition solid catalyst is very difficult, and the component of catalyst is more, and the formulation operations of catalyst are complicated, cost
It is high.It would therefore be highly desirable to select a kind of suitable liquid catalyst, the required activation energy of cracking hydrocarbon reaction is reduced, to change
Reaction pathway accelerates reaction rate, to reduce the required temperature of oil shale in-situ oil gas conversion, improve oil gas product qualities.
Invention content
The technical problem to be solved by the present invention is to provide a kind of oil shale in-situ exploitation use in view of the deficiencies of the prior art
Catalyst, the catalyst composition matter is less and is water-soluble catalyst, can preferably be injected into oil shale ore bed.
The present invention also provides a kind of application methods of above-mentioned catalyst, i.e., carry out oil shale in-situ using above-mentioned catalyst
The method of exploitation, this method accelerate kerogen to turn to oil gas by injecting above-mentioned water-soluble catalyst into oil shale ore bed
The process of change reduces oil shale in-situ conversion temperature, improves oil shale oil gas conversion ratio.
On the one hand a kind of oil shale in-situ exploitation catalyst is provided for the invention comprising magnesium sulfate and water.
According to the embodiment of the present invention, the mass ratio of the magnesium sulfate and water is 1:(100-1000).
Another aspect of the present invention provides a kind of application method of catalyst as described in the first aspect of the invention comprising
Following steps：
A carries out seam to underground oil shale mine layer, and arranges heated well and injection well in oil shale ore bed；
B injects into oil shale ore bed catalyst as described in the first aspect of the invention by injection well；
C promotes oil shale ore bed temperature using heated well, and constant temperature is kept, and carries out the generation of oil gas；
D opens oil channel, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
According to the preferred embodiment of the present invention, in step C, the temperature of oil shale ore bed is promoted to using heated well
340-380℃。
According to the preferred embodiment of the present invention, in step C, constant temperature is kept for 4-8 days.
According to the present invention, in step C, when carrying out the generation of oil gas, control oil shale mine coating systems Fluid pressure is no more than
The overlying lithostatic pressure of production range buried depth.
According to the preferred embodiment of the present invention, in step A, the seam carried out to underground oil shale mine layer is made including level
Seam and vertical seam.
In the present invention, in step A, seam is carried out by hydraulic fracturing.
According to the preferred embodiment of the present invention, in step D, the oil channel is adopting for the interior arrangement of oil shale ore bed
Oil well.
Beneficial effects of the present invention are：The bright catalyst of we is water-soluble catalyst, and component is less, is prepared
It is easy to operate, it is at low cost.The application method of catalyst of the present invention, by the oil shale mine for carrying out reservoir reconstruction to underground
Layer injection water-soluble catalyst reduces oil shale in-situ exploitation oil outlet temperature, improves out oil gas rate, and make product gas composition
It is dried, generates more methane；The catalyst has promoted oil shale to generate more oil gas in relative low temperature simultaneously, is low
Thermophase mining shale oil increases power and row drives energy, and current ground in-situ exploitation 400 is can reach at 340 DEG C -380 DEG C
DEG C or more shale oil recovery rate, realize energy-saving consumption-reducing, reduce oil shale in-situ conversion exploitation production cost target.
Description of the drawings
Illustrate the present invention below in conjunction with attached drawing.
Fig. 1 is the procedure chart of catalyst application method of the present invention.
Specific implementation mode
To make the present invention be readily appreciated that, it will illustrate the present invention in conjunction with attached drawing in detail below.
As previously mentioned, the catalyst currently used for the conversion of oil shale oil gas, is mainly based upon ground retorting technique, catalyst
Component is more and mostly solid catalyst.For the conversion exploitation of oil shale in-situ oil gas, solid is added toward underground and urges
Agent is very difficult, and the component of catalyst is more, and the formulation operations of catalyst are complicated, of high cost.
The present inventor passes through the study found that by the way that magnesium sulfate and water are configured to the suitable catalyst solution of concentration, by it
It injects in improved oil shale ore bed, the oil outlet temperature of oil shale in-situ exploitation can be reduced, improve out oil gas rate.The present invention
It is based on what the above method was made.
Therefore, the oil shale in-situ exploitation catalyst involved by one aspect of the present invention comprising magnesium sulfate and water.
According to the embodiment of the present invention, the mass ratio of the magnesium sulfate and water is 1:(100-1000).Magnesium sulfate and water
In the water-soluble catalytic agent solution of formation, if the too high levels of magnesium sulfate, the concentration of catalyst can be caused too high, so that urging
Agent crystallizes in use, blocks production tubing and oil shale ore bed oil and gas flow channel, reduces the yield of oil gas；
If the content of magnesium sulfate is too low, the concentration of catalyst can be caused too low, catalyst cannot be played significantly in use
Effect.In some currently preferred embodiments of the present invention, the mass ratio of the magnesium sulfate and water is 1:600.
Water-soluble catalyst of the present invention is magnesium sulfate.In the presence of sulfate, once reach required temperature
Thermochemical sulfate reduction, abbreviation TSR reactions can occur for degree.TSR reacts the gas yield that can improve hydro carbons, and
SO4 2-The heavier hydro carbons generated with kerogen degradation in oil shale reacts, and generates methane, product gas composition is made to be dried.
Possible reaction equation is：
MgSO4+ hydrocarbon → gaseous alkanes+MgCO3+H2S+CO2+H2O
MgSO4+ hydrocarbon → gaseous alkanes+Mg (HCO3)2+H2S+CO2+H2O
The application method of catalyst as described in the first aspect of the invention involved by another aspect of the present invention, as utilizes
The method that catalyst of the present invention carries out oil shale in-situ conversion, the flow chart of the application method is as shown in Figure 1, specifically include
Following steps：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And heated well and injection well are arranged in oil shale ore bed；
B injects into oil shale ore bed catalyst as described in the first aspect of the invention by injection well；
Oil shale ore bed temperature is promoted to 340-380 DEG C by C using heated well, and constant temperature is kept for 4-8 days, carries out oil gas
Generation；
D opens oil channel, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
The method for carrying out oil shale in-situ conversion using catalyst of the present invention exploits energy relative to existing destructive distillation in situ
Enough significantly improve in-situ retorting oil yield.Under the same terms, the in-situ retorting of oil shale is carried out using catalyst of the present invention
The more existing destructive distillation exploitation in situ of oil yield can most multipotency improve 49.7%；The more existing destructive distillation exploitation in situ of gas yield can be at most
70.7% can be improved.And using after catalyst of the present invention, in-situ retorting oil yield at 380 DEG C has been approached destructive distillation conversion
Exploitation 500 DEG C when oil yield, significant effect.
According to the present invention, when carrying out the generation of oil gas in step C, the amount of the catalyst of rate-determining steps B injections so that oily page
Rock ore bed system Fluid pressure is no more than overlying lithostatic pressure P (the P=ρ of production range buried depthRockGh, ρRockFor rock density, h
For production section area oil shale ore bed buried depth).
In the present invention, in step A, seam is carried out by hydraulic fracturing.
According to the preferred embodiment of the present invention, in step D, the oil channel is adopting for the interior arrangement of oil shale ore bed
Oil well.
Embodiment
To keep the present invention easier to understand, below in conjunction with embodiment, present invention be described in more detail, these realities
Apply example only serve it is illustrative, it is not limited to application range of the invention.If the raw material used in the present invention or component nothing
Specified otherwise can be made by commercial sources or conventional method.
Embodiment 1：
In Jilin Huadian somewhere, oil shale mine layer choosing determines the trial stretch of 5m × 5m, arrangement injection well, heated well and oil recovery
Well, well depth 60m, oil shale top plate buried depth 46m, oil shale layer thickness 12m, oil shale ore bed use the oil content that aluminium rice steamer method measures
22.35%, the mass ratio of magnesium sulfate and water is 1 in the catalyst used:100.
The application method of above-mentioned catalyst is as follows：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And injection well, heated well and producing well are arranged in oil shale ore bed；
B, by injection well into improved oil shale ore bed injecting catalyst solution；
C opens heated well, so that oil shale ore bed temperature is promoted to 380 DEG C, and constant temperature is kept for 8 days, carries out the life of oil gas
At；The control of oil shale mine coating systems Fluid pressure is in the overlying lithostatic pressure no more than production range buried depth during production of hydrocarbons
1.2MPa；
D opens producing well, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
Interpretation of result：Using catalyst of the present invention, it is in the oil yield that 380 DEG C of situ catalytics are exploited
8.37%, gas 38.04m3/ t rocks；It is fuel-displaced that in-situ retorting can be significantly improved relative to existing destructive distillation exploitation in situ
Rate.And it is generally acknowledged that destructive distillation 500 DEG C of oil yields of exploitation in situ use the oil content of aluminium rice steamer method measurement in oil shale ore bed
40%-60%, namely 500 DEG C of destructive distillation in situ exploit the final oil yield of trial zone oil shale in 8.94-13.41%, it is seen that
It is fuel-displaced when in-situ retorting oil yield at 380 DEG C has been approached 500 DEG C of destructive distillation conversion exploitation after catalyst of the present invention
Rate, significant effect.
Embodiment 2：
In 1 trial zone of embodiment adjacent to the similar region of geological conditions, carry out destructive distillation Mining Test in situ, namely omit
State the injecting catalyst step of embodiment 1.
The result shows that 380 DEG C of destructive distillation exploitation oil yields in situ are 6.44%, gas 22.29m3/ t rocks.
Embodiment 3：
In 1 trial zone of embodiment adjacent to the similar region of geological conditions, the trial stretch of 5m × 5m, arrangement arrangement note are selected
Enter well, heated well and producing well, well depth 60m, oil shale top plate buried depth 46m, oil shale layer thickness 12m, oil shale ore bed uses
The oil content 22.35% that aluminium rice steamer method measures, the mass ratio of magnesium sulfate and water is 1 in the catalyst used:90.
The application method of above-mentioned catalyst is as follows：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And injection well, heated well and producing well are arranged in oil shale ore bed；
B injects above-mentioned catalyst solution by injection well into improved oil shale ore bed；
C opens heated well, so that oil shale ore bed temperature is promoted to 380 DEG C, and constant temperature is kept for 8 days, carries out the life of oil gas
At；The control of oil shale mine coating systems Fluid pressure is in the overlying lithostatic pressure no more than production range buried depth during production of hydrocarbons
1.2MPa；
D opens producing well, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
Interpretation of result：When the mass ratio of magnesium sulfate in catalyst and water is 1:When 90, the situ catalytic exploitation at 380 DEG C
Oil yield be 6.02%, gas 18.04m3/ t rocks；It is exploited relative to existing destructive distillation in situ, the matter of magnesium sulfate and water
Amount is than being 1:90 catalyst fails to effectively improve in-situ retorting oil yield, mainly since the concentration of catalyst is too high so that
Catalyst crystallizes in use, and then blocks production tubing and oil shale ore bed oil and gas flow channel.
Embodiment 4：
In Period In Maoming somewhere, oil shale mine layer choosing determines the trial stretch of 3m × 3m, arrangement injection well, heated well and oil recovery
Well, well depth 80m, oil shale top plate buried depth 70m, oil shale layer thickness 8m, oil shale ore bed use the oil content that aluminium rice steamer method measures
7.8%, the mass ratio of magnesium sulfate and water is 1 in the catalyst used:1000.
The application method of above-mentioned catalyst is as follows：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And injection well, heated well and producing well are arranged in oil shale ore bed；
B injects above-mentioned catalyst solution by injection well into improved oil shale ore bed；
C opens heated well, so that oil shale ore bed temperature is promoted to 340 DEG C, and constant temperature is kept for 4 days, carries out the life of oil gas
At；The control of oil shale mine coating systems Fluid pressure is in the overlying lithostatic pressure no more than production range buried depth during production of hydrocarbons
Value 1.6MPa；
D opens producing well, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
The results show that the oil cut rate that the situ catalytic at 340 DEG C produces is 2.08%, gas 5.48m3/ t rocks.
Embodiment 5：
In 4 trial zone of embodiment adjacent to the similar region of geological conditions, carry out destructive distillation Mining Test in situ, namely omit
State the injecting catalyst step of embodiment 4.
The results show that the oil yield of the destructive distillation in situ exploitation at 340 DEG C is 1.89%, gas 4.54m3/ t rocks.
Embodiment 6：
In 4 trial zone of embodiment adjacent to the similar region of geological conditions, the trial stretch of 3m × 3m, arrangement injection are selected
Well, heated well and producing well, well depth 80m, oil shale top plate buried depth 70m, oil shale layer thickness 8m, oil shale ore bed is using aluminium rice steamer
The oil content 7.8% that method measures, the mass ratio of magnesium sulfate and water is 1 in the catalyst used:600.
The application method of above-mentioned catalyst is as follows：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And injection well, heated well and producing well are arranged in oil shale ore bed；
B injects above-mentioned catalyst solution by injection well into improved oil shale ore bed；
C opens heated well, so that oil shale ore bed temperature is promoted to 340 DEG C, and constant temperature is kept for 4 days, carries out the life of oil gas
At；The control of oil shale mine coating systems Fluid pressure is in the overlying lithostatic pressure no more than production range buried depth during production of hydrocarbons
Value 1.6MPa；
D opens producing well, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
The results show that it is 1 to work as the mass ratio of magnesium sulfate and water in catalyst:600, the situ catalytic exploitation at 340 DEG C
Oil yield be 2.83%, gas 7.57m3/ t rocks；Original position can be significantly improved relative to existing destructive distillation exploitation in situ
Exploit oil yield.And embodiment 4 is compared with embodiment 6, only changes the concentration of catalyst, catalyst is 1 with water quality ratio:
600 it is with obvious effects than catalyst and water quality ratio be 1:1000 effect is good.
Embodiment 7：
In 4 trial zone of embodiment adjacent to the similar region of geological conditions, the trial stretch of 3m × 3m, arrangement injection are selected
Well, heated well and producing well, well depth 80m, oil shale top plate buried depth 70m, oil shale layer thickness 8m, oil shale ore bed is using aluminium rice steamer
The oil content 7.8% that method measures, the mass ratio of magnesium sulfate and water is 1 in the catalyst used:1100.
The application method of above-mentioned catalyst is as follows：
A carries out horizontal seam and vertical seam to underground oil shale mine layer, generates transverse crack and longitudinal crack respectively,
And injection well, heated well and producing well are arranged in oil shale ore bed；
B injects above-mentioned catalyst solution by injection well into improved oil shale ore bed；
C opens heated well, so that oil shale ore bed temperature is promoted to 340 DEG C, and constant temperature is kept for 4 days, carries out the life of oil gas
At；The control of oil shale mine coating systems Fluid pressure is in the overlying lithostatic pressure no more than production range buried depth during production of hydrocarbons
Value 1.6MPa；
D opens producing well, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
The results show that it is 1 to work as the mass ratio of magnesium sulfate and water in catalyst:1100, it is exploited in 340 DEG C of situ catalytics
Oil yield is 1.92%, gas 4.68m3/ t rocks；Fail to significantly improve in situ open relative to existing destructive distillation exploitation in situ
Oil cut rate is produced, mainly since the concentration of catalyst is too low, catalyst fails to play apparent effect in use.
It should be noted that embodiment described above is only used for explaining the present invention, do not constitute to any of the present invention
Limitation.By referring to exemplary embodiments, invention has been described, it should be appreciated that word used in it is descriptive
With explanatory vocabulary, rather than limited vocabulary.The present invention can be made within the scope of the claims by regulation
Modification, and the present invention is revised in without departing substantially from scope and spirit of the present invention.Although the present invention described in it relates to
And specific method, material and embodiment, it is not intended that the present invention is limited to particular case disclosed in it, on the contrary, this hair
It is bright to can be extended to other all methods and applications with the same function.
Claims (9)
1. a kind of oil shale in-situ exploitation catalyst comprising magnesium sulfate and water.
2. catalyst according to claim 1, which is characterized in that the mass ratio of the magnesium sulfate and water is 1:(100-
1000)。
3. a kind of application method of catalyst as claimed in claim 1 or 2 comprising following steps：
A carries out seam to underground oil shale mine layer, and arranges heated well and injection well in oil shale ore bed；
B injects catalyst as claimed in claim 1 or 2 into oil shale ore bed by injection well；
C promotes oil shale ore bed temperature using heated well, and constant temperature is kept, and carries out the generation of oil gas；
D opens oil channel, so that the oil gas of generation is exported by crack, realizes the in-situ retorting of oil shale.
4. application method according to claim 3, which is characterized in that in step C, using heated well by oil shale ore bed
Temperature is promoted to 340-380 DEG C.
5. application method according to claim 3 or 4, which is characterized in that in step C, constant temperature is kept for 4-8 days.
6. according to the application method described in any one of claim 3-5, which is characterized in that in step C, carry out the generation of oil gas
When, control oil shale mine coating systems Fluid pressure is no more than the overlying lithostatic pressure of production range buried depth.
7. according to the application method described in any one of claim 3-6, which is characterized in that in step A, to underground oil shale mine
The seam that layer carries out includes horizontal seam and vertical seam.
8. according to the application method described in any one of claim 3-7, which is characterized in that in step A, by hydraulic fracturing into
Row seam.
9. according to the application method described in any one of claim 3-8, which is characterized in that in step D, the oil channel
For the producing well arranged in oil shale ore bed.
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| CN117166976A (en) * | 2023-09-14 | 2023-12-05 | 东北石油大学 | Oil shale fireflood in-situ catalytic combustion method |
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