CN104265257B - The combustion in situ huff and puff oil recovery method of fracturing propping agents filling auxiliary catalysis igniting - Google Patents
The combustion in situ huff and puff oil recovery method of fracturing propping agents filling auxiliary catalysis igniting Download PDFInfo
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- CN104265257B CN104265257B CN201410446090.7A CN201410446090A CN104265257B CN 104265257 B CN104265257 B CN 104265257B CN 201410446090 A CN201410446090 A CN 201410446090A CN 104265257 B CN104265257 B CN 104265257B
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 60
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 44
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 title claims abstract description 32
- 239000003054 catalyst Substances 0.000 claims abstract description 44
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 43
- 239000007924 injection Substances 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 239000006004 Quartz sand Substances 0.000 claims abstract description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 13
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000003129 oil well Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 239000003921 oil Substances 0.000 description 55
- 239000010779 crude oil Substances 0.000 description 26
- 239000007789 gas Substances 0.000 description 15
- 230000008569 process Effects 0.000 description 11
- 239000012530 fluid Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000002671 adjuvant Substances 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010793 Steam injection (oil industry) Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 229930195734 saturated hydrocarbon Natural products 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000010426 asphalt Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000007233 catalytic pyrolysis Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910052763 palladium Inorganic materials 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/243—Combustion in situ
- E21B43/247—Combustion in situ in association with fracturing processes or crevice forming processes
-
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides the combustion in situ huff and puff oil recovery method of a kind of fracturing propping agents filling auxiliary catalysis igniting, the method comprising the steps of: in well-case perforating aboveground enforcement fracturing to cause man-made fracture in the earth formation, adds fracturing propping agents and the mixture filling crack of catalyst and screen casing and casing annulus；Wherein, described fracturing propping agents include gravel, haydite and/or quartz sand；Lower pump is cold to be adopted until pit shaft is fuel-displaced；Inject 150～400t steam to stratum, stratum is preheated；To stratum, oil reservoir is lighted in continuous air injection；After air injection terminates, stewing well；Drive a well back production.The method using the present invention can improve ignition success rate, and promote combustion in situ and handle up development effectiveness.
Description
Technical field
The invention belongs to field of petroleum exploitation, use pressure break and proppant pack technology auxiliary catalysis point particularly to one
The combustion in situ huff and puff oil recovery method of fire.
Background technology
At present China's heavy oil development mode mainly includes steam soak (accounting for 78%), steam drive (accounting for 10%) and
Conventional water drive (accounting for 10%).These method techniques are simple, and recovery ratio is higher, are suitable for that buried depth is shallower (to be less than
Heavy crude reservoir 1000m).But, for bury the deep oil reservoir of (more than 1500m), water-sensitivity damage, thin mutually
Layer oil reservoir etc., owing to steam injection heat loss rate is big, the problems such as steam injection pressure is big, bring tired to the exploitation of such viscous crude
Difficult.Above steam injection is difficult to the oil reservoir of effective exploitation, general it is contemplated that use situ combustion technology (containing burning oil
Layer is handled up and combustion in situ displacement) exploitation, wherein the combustion in situ technology of handling up has advantage and the potentiality of uniqueness.
Combustion in situ handle up crude oil extraction include injecting, stewing well, back production three phases.In the stage of injection, use electric heating
The firing techniques such as igniting, chemic ignition or autogenous ignition, are heated to oil reservoir more than crude oil burning-point, use air pressure simultaneously
Contracting machine is continuously injected into air in oil reservoir, and the burning crude oil of near wellbore zone produces heat and generates flue gas, peripherally
Layer radially advances and diffusion；In the stewing well stage, stop air and inject and closing well, make non-condensing gas continue to spread and molten
Solving, heat transmits to depth；At recovery phase, again drive a well, at the multiple action machine such as heating, viscosity reducing, dissolved gas drive
Crude oil, injection gas and flue gas extraction from oil well in the lower oil reservoir of reason.
During combustion in situ, the most frequently used sparking mode is electric heater ignition process at present, has been reported that in document more.
But during combustion in situ is handled up, igniting/gas injection well itself is again producing well, electric heater to take before recovering the oil
Going out pit shaft, this causes the biggest difficulty to Contraction in Site, the most even cannot realize that (mainly job safety cannot
Ensure).For most formation temperatures oil reservoir less than 75 DEG C, it is impossible to utilize formation condition to realize spontaneous ignition,
Chemic ignition almost becomes unique selection in this case.
CN1995697A discloses a kind of oil reservoir fire-flooding thermal-ignition method, wherein use active shell dress formula gas-
Vapour generator complexes inject high-temperature gas mixture body and are preheated on stratum to stratum, then continuous air injection makes crude oil to stratum
Burning, the method substantially belongs to preheating igniting, and principle is similar to electrical heating igniting.CN1789660A discloses one
Planting stimulated ignition method for fire-flooding driven oil well, wherein preheated by high-temperature steam, then air injection realizes spontaneous ignition.On
Stating two kinds of ignition methods and be all not related to chemical catalyst or combustion adjuvant, both sparking mode are owing to start-up temperature is less than electricity
Mode of heating and do not use catalyst, it is not easy to realize high temperature and burn completely, in mining site practice, there is low temperature in multiple wells
Oxidative phenomena, output carbon dioxide in gas content is not enough, and viscosity of crude goes up not down and (do not occurs Pintsch process to change
Matter).
CN101161987B discloses the Technology of a kind of combustion soaking heavy crude producing, and description is that combustion soaking is opened
Adopting air injection igniting in technology, stewing well and oil recovery stage technique parameter and feature, the ignition method wherein recommended is that electricity adds
Thermal ignition, natural gas fired and spontaneous ignition, be also not related to catalytic ignition method.
CN101122227A discloses a kind of fire flooding oil extraction crude oil combustion-assistant ignition process, is wherein to be passed through on stratum
After injecting a certain amount of steam preheating, by the metal combustion adjuvant such as platinum, palladium (i.e. described in present invention catalyst) with former
Oil injects stratum by a certain percentage, and continuous air injection simultaneously is lighted a fire.This sparking mode is than above two sparking mode
Improving, but the combustion adjuvant owing to being used is solid particle, its particle size is commonly greater than porous media mesopore, stratum
The size of venturi, causes the wherein overwhelming majority cannot enter depths, stratum along with crude oil, but is trapped near wellbore zone,
Therefore catalysis or combustion-supporting effect cannot be played in a long time.Mining site practice process there is multiple wells even to cause
Near wellbore formation blocks, and not only loss of ignition also have to carry out extra assignment.
To sum up, although at present chemical catalysis firing technique advantages, it is suitable for combustion in situ and handles up process, but existing
Chemic ignition catalyst (such as platinum/C catalyst, palladium/carbon catalyst etc.) mostly is solid granular, difficult in actual application
Effectively persistently to play a role, chemical catalysis firing technique is not widely applied.
Summary of the invention
The present invention is primarily directed to chemical catalysis firing technique catalyst or combustion adjuvant is difficult to effectively persistently to play a role
Problem, it is provided that the combustion in situ huff and puff oil recovery method of a kind of fracturing propping agents filling auxiliary catalysis igniting, improves some pyrogene
Power, and promote combustion in situ and handle up development effectiveness.
The invention provides the combustion in situ huff and puff oil recovery method of a kind of fracturing propping agents filling auxiliary catalysis igniting, the party
Method includes step:
(1) in well-case perforating aboveground enforcement fracturing to cause man-made fracture in the earth formation, fracturing propping agents are added
With the mixture filling crack of catalyst and screen casing and casing annulus；Wherein, described fracturing propping agents include gravel, pottery
Grain and/or quartz sand；
(2) under, pump is cold adopts until pit shaft is fuel-displaced；
(3) inject 150～400t steam to stratum, stratum is preheated；
(4) to stratum, oil reservoir is lighted in continuous air injection；
(5) after air injection terminates, stewing well；
(6) drive a well back production.
In the method for the present invention, mainly by pressure break and the technical process of proppant pack, solid granular is catalyzed
Agent uniformly mixes with proppant, enters crack and distal strata with fracturing fluid and is uniformly filled into the annular space of sleeve pipe and screen casing
In.The scope that so catalyst plays a role is not limited solely near wellbore zone.Described catalyst is at gas injection ignition phase
The time of the effect that can play catalytic combustion-supporting be continued until combustion zone away from after fracture tip (far away from 15 days with
On), it is achieved high-temperature stable burns；When the stage crude oil that recovers the oil flows through crack, as long as temperature is more than 150 DEG C (at fire
During oil firing layer is handled up, under combustion zone effect, the crude oil in recovery phase most of the time internal fissure is higher than this
Temperature), catalyst just can play its catalytic pyrolysis modification effect to crude oil, reduces former oil viscosity；Thus
Limits improves ignition success rate and combustion in situ and handles up development effectiveness.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, described catalyst is chemic ignition catalyst, the platinum/carbon of preferably 3%～8% bullion content
Catalyst or palladium/carbon catalyst.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, catalyst is mixed in fracturing propping agents with the volume ratio accounting for proppant 0.02%～0.4%.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, the particle diameter of proppant is 0.425～0.850mm.Catalyst uses the conventional particle size of art
Catalyst.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, depending on formation condition, the expanded height in the crack that general fracturing causes is that core intersection is (right
In stratified reservoir, fracture height adds middle compartment thickness equal to oil reservoir gross thickness), Fracture half-length is 30～50m.
The present invention utilizes fracturing form vertical man-made fracture at pit shaft both wings, change around pit shaft former by man-made fracture
The Radial Flow Through Porous Media come flows to and seepage flow interfacial area, can increase substantially the note of ignition phase during combustion in situ is handled up
Ability of air.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, add fracturing propping agents and the mixture filling crack of catalyst and screen casing and casing annulus.Split
The distribution of seam i.e. catalyst are in the main distribution of oil reservoir.Under normal circumstances, in the present invention, pressure break supports
Agent consumption is 30～70m3。
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, after pressing crack construction terminates, under step (2), pump is cold adopts until pit shaft is fuel-displaced, mainly discharges
Fracturing fluid, allows the crude oil in stratum be full of crack and screen casing annulus simultaneously.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, steam is injected mainly by stratum preheating in the cold backward stratum of end of adopting.It is preferably injected during Gai
Vapor (steam) temperature more than 250 DEG C, 250～374 DEG C.It is highly preferred that injecting quantity of steam is 200～300t.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, inject the speed 6000～35000m of air3/d。
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
In huff and puff oil recovery method, in step (5), the stewing well time is 2～5 days, preferably 2～3 days.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
Huff and puff oil recovery method, is particularly well-suited to the heavy crude reservoir of hyposmosis, the heavy crude reservoir of thin layer and/or the viscous crude of thin interbed
Oil reservoir.When for the exploitation of alternate thin beds reservoir, the man-made fracture that beneficially fracturing transformation produces realizes having of interlayer
Imitate through.
According to specific embodiments of the present invention, the combustion in situ of the fracturing propping agents filling auxiliary catalysis igniting of the present invention
Huff and puff oil recovery method, is additionally included in air injection and terminates in backward oil well nitrogen injection slug or steam slug and carry out stewing well again
Process.Air in burned region in oil reservoir so can be replaced combustion zone, thus consume completely in burned region
Oxygen, reduces oxygen concentration in exploitation process, it is achieved safety coal extraction.
In sum, the invention provides the combustion in situ huff and puff oil recovery of a kind of fracturing propping agents filling auxiliary catalysis igniting
Method, it has the advantage that
1) method applying the present invention, can enter crack and ground along with fracturing fluid by catalyst granules together with proppant
Layer far-end, the scope that such catalyst plays a role is not limited solely near wellbore zone, solves catalyst and effectively plays
The problem that action time is short.It is continued until that combustion zone is away from splitting in the time that gas injection ignition phase catalyst plays a role
After seam end (far away from more than 15 days), can be completely achieved crude oil high-temp combustion, meet or exceed electrical heating igniting effect
Really；
2) method applying the present invention, the success rate of steam preheating igniting significantly improves, output carbon dioxide in gas
Component rises to more than 15%, and combustion zone leading edge peak temperature brings up to 450 DEG C from 300 DEG C.
3) method applying the present invention, the combustion in situ process of handling up achieves burning completely and more sufficient crude oil splits
Solving modification, on-the-spot application shows, the crude oil light components after catalytic pyrolysis increases, heavy component reduces, viscosity of crude
Drop to about 1st/1 to two/3rds of prime stratum viscosity of crude；
4) wind that during combustion in situ is handled up, oil reservoir generation low-temperature oxidation causes reservoir permeability to reduce is greatly reduced
Danger, improves single well productivity.
Accompanying drawing explanation
The combustion in situ of Fig. 1: the present invention handle up during the schematic diagram of fracturing propping agents filling auxiliary catalysis ignition method.
In figure, 1 wire-wrapped screen；2 sleeve pipes (perforation)；3 crack walls (proppant+catalyst)；4 original oil districts；D
Fracture half-length；The latter half is schematic top plan view.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, in conjunction with instantiation
And technical scheme is carried out described further below by accompanying drawing, it should be understood that these examples be merely to illustrate the present invention and
It is not used in restriction the scope of the present invention.Perforation etc. before the step mentioned the most in detail in each embodiment, such as fracturing,
All can carry out according to the routine operation of art.
Shown in Figure 1, the combustion in situ of the present invention handle up during fracturing propping agents filling auxiliary catalysis igniting side
Method specifically includes that
On the basis of well-case perforating, implement fracturing, after pressure break, define the most vertical oval sides of fracture
Face, then fills proppant and the mixture of catalyst in crack, and screen casing and casing annulus filling proppant with
The mixture of catalyst；(platinum/C catalyst or palladium/carbon are urged for proppant and the solid granular catalyst being mixed therein
Agent) it is evenly distributed in crack, (by the proppant pack) being simultaneously also uniformly dispersed between wire-wrapped screen and sleeve pipe
In annular space (top view see in Fig. 1)；
After catalyst is inserted, lower pumping oil, make the crude oil in stratum flow through crack and be full of between wire-wrapped screen and sleeve pipe
Annular space, is beneficial to next step igniting；
The steam of a pill (temperature is more than 250 DEG C, 150～400t) is injected, to realize near wellbore zone before igniting
Preheating；
Then being continuously injected into air to stratum, under the effect of catalyst, air contacts realization height with the crude oil after preheating
Temperature burning；During combustion zone is pushed ahead, as long as before combustion zone leading edge does not break through crack tail end, catalyst
Play a role always；
After air injection terminates, nitrogen injection slug or steam slug in oil well, stewing well 2-3 days；
Drive a well back production；In exploitation process, flow first in crack through the crude oil that combustion zone and heat front thereof are heated,
Pit shaft is flowed to the most again from crack.In this process, high temperature crude oil fully can connect with the catalyst in crack always
Touch, realize cracking modification with abundant.
Embodiment 1
Oil reservoir 1 oil reservoir degree of depth 800m；Core intersection 19.6m；Reservoir permeability 610 × 10-3μm2；Reservoir temperature 32 DEG C；
Viscosity of crude 5100mPa.s；Oil density 0.9240g/cm3；Oil saturation 58.9%；J3 well is on this oil reservoir 1
Mouth producing well, conventional cold yield of adopting is less than limiting economic rate.
1) in J3 aboveground enforcement well-case perforating completion, perforated interval 17.6m, upper and lower respectively the keeping away of oil layer section penetrates 1m.
2) hydraulic fracturing proppants filling technique is used to extrude man-made fracture.Specific construction parameter is as follows: accumulative addition
Particle diameter is the haydite 40m of 0.425mm～0.850mm3, this haydite before addition with the platinum/C catalyst of 4% platinum content
40 liters of mix homogeneously；Prepad fluid 40m3；Crosslinking load fluid 105m3；Discharge capacity 3.5m3/min；During construction, sand compares ladder
It is incremented by, from 10%～80%, reaches to add after high sand ratio displacement fluid 5m3。
3), after the sand off of pressure break gravel, lower pump is cold to be adopted until pit shaft is fuel-displaced.
4) inject 200t steam (temperature 280 DEG C) to stratum, stratum is preheated.
5) oil reservoir is lighted to stratum continuous air injection, neighbouring 70m outer producing well monitoring gas concentration lwevel during igniting
Rise to 15.5% after 7 days, accumulative gas injection 70 × 104m3Rear end gas injection.
6), after air injection terminates, in oil well, 80000m is injected3Nitrogen slug.
7) stewing well back production after 3 days, J3 well initial stage peak value yield 21t/d, average production per well 11t/d, the cycle tires out yield
1930t.Output crude oil average viscosity is the 51% of prime stratum viscosity of crude, i.e. 2600mPa.s.Warp after back production 45 days
Cross crude oil 4 component analysis, it was demonstrated that in crude oil, the component of saturated hydrocarbons rises 15%, and resin and asphalt component have dropped
22%, crude oil achieves modification.After back production 150 days, in output crude oil, saturated hydrocarbon content is still than original oil many 9%,
Prove that catalyst persistently plays a role.
Embodiment 2
Oil reservoir 2 oil reservoir degree of depth 1200m；Core intersection divides 3 little thin layers, gross thickness 11.2m；Reservoir permeability
410×10-3μm2；Reservoir temperature 30 DEG C；Viscosity of crude 4800mPa.s；Oil density 0.9220g/cm3；Oil-containing is satisfied
With degree 55.9%.J15 well is 1 mouthful of producing well on oil reservoir, and routine is cold adopts without production capacity.
1) in J15 aboveground enforcement well-case perforating completion, oil layer section is all penetrated out；
Hydraulic fracturing proppants filling technique is used to extrude man-made fracture.Specific construction parameter is as follows: accumulative addition particle diameter
Haydite 30m for 0.425mm～0.850mm3, this haydite before addition with the palladium/carbon catalyst 35 liters of 4% palladium content
Mix homogeneously；Prepad fluid 35m3；Crosslinking load fluid 85m3；Discharge capacity 3.2m3/min；Construction medium sand is incremented by than ladder,
From 10%～80%, reach to add after high sand ratio displacement fluid 5m3。
2), after the sand off of pressure break gravel, lower pump is cold to be adopted until pit shaft is fuel-displaced.
3) inject 150t steam (temperature 295 DEG C) to stratum, stratum is preheated.
4) oil reservoir is lighted to stratum continuous air injection, neighbouring 100m outer producing well monitoring gas concentration lwevel during igniting
Rise to 15.1% after 10 days, accumulative gas injection 650000m3Rear end gas injection.
5), after air injection terminates, in oil well, 65000m is injected3Nitrogen slug.
6) stewing well back production after 3 days, J15 well initial stage peak value yield 14.5t/d, average production per well 9.71t/d, cycle tired product
Amount 1410t.Output crude oil average viscosity is the 48.9% of prime stratum viscosity of crude, i.e. 2350mPa.s.Back production 30 days
After, measure back production crude oil 4 component, it was demonstrated that in crude oil, the component of saturated hydrocarbons rises 17%, resin and asphalt component
Have dropped 23.2%.
Claims (12)
1. a combustion in situ huff and puff oil recovery method for fracturing propping agents filling auxiliary catalysis igniting, the method includes step
Rapid:
(1) in well-case perforating aboveground enforcement fracturing to cause man-made fracture in the earth formation, fracturing propping agents are added
With the mixture filling crack of catalyst and screen casing and casing annulus；Wherein, described fracturing propping agents include gravel, pottery
Grain and/or quartz sand；
(2) under, pump is cold adopts until pit shaft is fuel-displaced；
(3) inject 150～400t steam to stratum, stratum is preheated；
(4) to stratum, oil reservoir is lighted in continuous air injection；
(5) after air injection terminates, stewing well；
(6) drive a well back production.
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 1 igniting
Method, wherein, described catalyst is chemic ignition catalyst.
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 2 igniting
Method, wherein, described catalyst is platinum/C catalyst or the palladium/carbon catalyst of 3%～8% bullion content.
4. the combustion in situ lighted a fire according to the fracturing propping agents filling auxiliary catalysis described in claim 1 or 2 or 3 gulps down
Telling oil production method, wherein, catalyst is mixed in fracturing propping agents with the volume ratio accounting for proppant 0.02%～0.4%.
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 4 igniting
Method, wherein, the particle diameter of proppant is 0.425～0.850mm.
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 1 igniting
Method, wherein, the expanded height in the crack that fracturing causes is core intersection, and Fracture half-length is 30～50m.
7. the combustion in situ lighted a fire according to the fracturing propping agents filling auxiliary catalysis described in claim 1 or 6 is handled up and is adopted
Oil method, wherein, fracturing propping agents consumption is 30～70m3。
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 1 igniting
Method, wherein, injection vapor (steam) temperature 250～374 DEG C.
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 1 igniting
Method, wherein, injects the speed 6000～35000m of air3/ d, cyclic injection amount 30 × 104～100 × 104m3。
The combustion in situ huff and puff oil recovery side of fracturing propping agents filling auxiliary catalysis the most according to claim 1 igniting
Method, wherein, in step (5), the stewing well time is 2～5 days.
The combustion in situ huff and puff oil recovery side of 11. fracturing propping agents filling auxiliary catalysis according to claim 1 igniting
Method, the method is for the heavy crude reservoir of hyposmosis, the heavy crude reservoir of thin layer and/or the heavy crude reservoir of thin interbed.
The combustion in situ huff and puff oil recovery side of 12. fracturing propping agents filling auxiliary catalysis according to claim 1 igniting
Method, the method is additionally included in air injection and terminates nitrogen injection slug or steam slug in backward oil well and carry out the mistake of stewing well again
Journey.
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| CN106753503A (en) * | 2016-12-03 | 2017-05-31 | 吉林大学 | A kind of method that oil shale in-situ catalytic oxidation extracts shale oil gas |
| CN108222895A (en) * | 2016-12-14 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of gravel filling sand prevention method |
| CN115161004B (en) * | 2022-08-11 | 2023-07-18 | 安东石油技术（集团）有限公司 | Catalytic viscosity reduction propping agent for fracturing and preparation method thereof |
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| CN101004132A (en) * | 2007-01-04 | 2007-07-25 | 中国石油大学(华东) | Exploitation technique for disgorging thick oil by pouring air to assistant steam |
| CN101122224A (en) * | 2006-08-11 | 2008-02-13 | 中国石油天然气股份有限公司 | Gravity-assisted steam flooding exploitation method for heavy laver common heavy oil reservoir |
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| CN202810813U (en) * | 2012-08-08 | 2013-03-20 | 张方礼 | Well pattern structure for using combustion and steam combination flooding to jointly exploit thick oil |
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