CN106223911B - It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir - Google Patents
It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir Download PDFInfo
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- CN106223911B CN106223911B CN201610623446.9A CN201610623446A CN106223911B CN 106223911 B CN106223911 B CN 106223911B CN 201610623446 A CN201610623446 A CN 201610623446A CN 106223911 B CN106223911 B CN 106223911B
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- 239000001301 oxygen Substances 0.000 title claims abstract description 50
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 50
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 79
- 239000007924 injection Substances 0.000 claims abstract description 79
- 239000007789 gas Substances 0.000 claims abstract description 75
- 239000003921 oil Substances 0.000 claims abstract description 60
- 238000005336 cracking Methods 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000010779 crude oil Substances 0.000 claims abstract description 15
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims abstract description 9
- 229930195725 Mannitol Natural products 0.000 claims abstract description 9
- 239000000594 mannitol Substances 0.000 claims abstract description 9
- 235000010355 mannitol Nutrition 0.000 claims abstract description 9
- 108010077895 Sarcosine Proteins 0.000 claims abstract description 7
- 230000001590 oxidative effect Effects 0.000 claims abstract description 7
- 229940048098 sodium sarcosinate Drugs 0.000 claims abstract description 6
- ZUFONQSOSYEWCN-UHFFFAOYSA-M sodium;2-(methylamino)acetate Chemical compound [Na+].CNCC([O-])=O ZUFONQSOSYEWCN-UHFFFAOYSA-M 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000011435 rock Substances 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 235000009508 confectionery Nutrition 0.000 claims description 8
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
- 239000011734 sodium Substances 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 11
- 238000011084 recovery Methods 0.000 abstract description 8
- 239000003999 initiator Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000084 colloidal system Substances 0.000 abstract description 3
- 230000002277 temperature effect Effects 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000002045 lasting effect Effects 0.000 description 4
- 239000013589 supplement Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 150000003254 radicals Chemical class 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229940062043 nitrogen 50 % Drugs 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229940062042 oxygen 50 % Drugs 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- FSYKKLYZXJSNPZ-UHFFFAOYSA-N sarcosine Chemical compound C[NH2+]CC([O-])=O FSYKKLYZXJSNPZ-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000005417 food ingredient Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229940103067 oxygen 60 % Drugs 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 235000013324 preserved food Nutrition 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229940043230 sarcosine Drugs 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000010148 water-pollination Effects 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
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/594—Compositions used in combination with injected gas, e.g. CO2 orcarbonated gas
-
- 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
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
-
- 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
- E21B43/18—Repressuring or vacuum methods
-
- 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
- E21B43/241—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provide it is a kind of noting strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, include the following steps：High-pressure gas injection well completion is carried out to gas injection well first, injects 0.05~0.15PV initiators after completion into gas injection well, initiator uses sodium sarcosinate and mannitol；Strong high-pressure gas injection is carried out, injects 3~50,000 mark side's air to stratum；It is denitrogenated by air, isolates the oxygen-rich mixture of oxygen quality percentage 50~70%, oxygen-rich mixture is injected into oil reservoir；Carry out strong high-pressure gas injection；After stratum, which cracks, stablizes, increases gas injection rate and carry out strong high-pressure gas injection.This method cracks the crude oil of script colloid, heavy under formation temperature effect through Strong oxdiative, greatly improves rate of oil production and recovery ratio that follow-up air drives, reduces the oxidative cracking reaction time, realize quick oxicracking, improve the service efficiency of gas.
Description
Technical field
Strong pressure-air, oxygen-enriched flooding method being noted to deep buried hill reservoir the present invention relates to a kind of, belongs to oil and opens
Adopt field.
Background technology
There is the storage entirely different with sandstone oil reservoir reservoir to ooze structure for the reservoir of buried hill reservoir, have oil reservoir deeper
The characteristics of (2000~7000 meters most of), oil reservoir thicker (generally between 100~600 meters), with other air injection displacement of reservoir oil sides
Method is completely different, first has to the accurate judgement oil reservoir as gas-drive pool or water drive oil reservoir, gas-drive pool in this way is at oil reservoir bottom
Portion's gas injection, side in this way, bottom water water-drive pool are to use high-power full load gas injection pattern then in the gas injection of oil reservoir high-order bit.
It is a large amount of studies have shown that the reservoir of buried hill reservoir is actually to be made of two kinds of storage systems of oozing, i.e. Fracture System and rock
Block system.The reservoir spaces of the two systems, permeability, porosity and oil recovery mechanism are far from it.
(1) Fracture System, be by width lower limit under reservoir condition for 10 μm crack and be attached thereto logical solution cavity institute group
At fracture pore network, i.e., usually said macropore and intermediate pore have the characteristics that low hole, hypertonic, crack when oil recovery
The hollow billet force effect of system is negligible.
(2) rock mass, the sillar made of being cut by crack form, and the reservoir and flow space in sillar includes that width is less than
10 μm of small cracks and coupled same intergranular, intercrystalline pore, corrosion hole, porosity is big compared with Fracture System porosity, is
Good oil storage space, but its permeability is poor.
Rock mass mechanism of oil displacement is：Under flowing pressure gradient between Fracture System and rock mass, displacing medium
Into sillar oil extraction, the water in Fracture System sucks sillar oil extraction by the hollow billet force effect of hydrophilic sillar, in crack~hole
In dual media, in addition to pressure difference, imbibition, gravity driving force, channelling is spread, and sillar~sillar effect is equal to oil displacement process
Participation acts on.
Due to the geologic feature of buried hill reservoir temperature, depth, the physical property (water absorbing capacity is strong) of oil reservoir is needed in sky
Large quantity of air is injected before gas drive, oxygen carries out the transformation on stratum.
The ingredient of rock is mainly carbonate and alumino-silicate in buried hill formation.Alumino-silicate has typical flake crystalline
Body structure, such crystal are made of two class basic structures：One kind is made of silicone atom layer, and apparent is in tetrahedral geometry, referred to as
Silica piece；Another kind of be made of magnesium, aluminium hydrogen-oxygen atomic layer, and apparent is in octahedral form, referred to as water aluminium flake.Buried hill formation is big
Part is made of the above Liang Lei elementary organizations.Silicon atom can be replaced by aluminium atom in tissue, aluminium atom in octahedral structure body
It can be replaced by low-valent metal atom, to cause crystal structure surface charge uneven, every layer of surface can be caused often adsorbable
There is various types of cation.
The research exploited in the prior art to buried hill reservoir is less, and and initiator is not used, there are oxidations to split
It is slow to solve speed, rate of oil production and the low problem of recovery ratio.Existing air-injection displacement technology is primarily adapted for use in 1000 meters of oil reservoir depth
The oil reservoir of left and right, it is bad to the exploitation effect of buried hill reservoir.
Invention content
To solve the above problems, the present invention provides and a kind of noting strong pressure-air, the oxygen-enriched displacement of reservoir oil to deep buried hill reservoir
Method, by noting initiator and air progress stratum transformation (to adapt to Fracture System, rock mass) to deep buried hill reservoir,
It is then poured into oxygen-rich mixture to light a fire, realizes quick oxicracking, and subsequently in a manner of strong high pressure to stratum gas injection, into
Row quickly diffusion, quickly propels cracking band, and the efficient displacement of reservoir oil is carried out to buried hill reservoir.
It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, according to the preservation of buried hill reservoir
Condition, geological structure and well pattern arrangement situation, select gas injection well and producing well, include the following steps：
Step 1. carries out high-pressure gas injection well completion to gas injection well first；
The mixture of 0.05~0.15PV sodium sarcosinates and mannitol, sarcosine are injected after step 2. completion into gas injection well
The mass ratio of sodium and mannitol is 1: 2~1: 4, and confection is soluble in water, and mass percent is 2%~5%；
Step 3. carries out strong high-pressure gas injection, injects 3~50,000 mark side's air, the oxygen in air to stratum by gas injection well
Ingredient to buried hill crack, sillar carry out full load gas injection, by colloid, heavy crude oil formation temperature effect under Strong oxdiative split
Solution, the nitrogen of generation, carbon dioxide addedly lower deficit, basis early period is carried out for the drive of follow-up air；
Step 4. is denitrogenated by air, isolate oxygen-rich mixture (mass percent be oxygen 50~70%, nitrogen 30~
50%) 3~50,000 mark side's oxygen-rich mixtures, are injected into oil reservoir, oxygen-rich fraction occurs redox reaction with crude oil, promotes crude oil
Cracking discharges heat, since buried hill reservoir original formation temperature is higher (120~300 °), can make the oxygen of injection quickly with original
Fry dried food ingredients gives birth to cracking reaction, it can be achieved that oil reservoir autogenous ignition, can make oil reservoir that Strong oxdiative cracking occur.After cracking reaction occurs for oil reservoir,
Discharge a large amount of CO2And heat, CO2It is partially soluble in crude oil, serves as surfactant, crude oil is diluted, simultaneously because note
Enter large quantity of air and oxygen-enriched, renwing stratum reset pressure is realized by oxicracking, restores original oil recovery energy；
Step 5. carries out strong high pressure air injection, the CO generated with the lasting injection of strong pressure-air, oxidative cracking reaction2
Pneumatic jack is formed in top of oil horizon with nitrogen, applies downward immense pressure to oil reservoir, constantly supplements stratum energy；
Step 6. examines oxygen discharge capacity in tail gas by producing well, calculates underground cracking situation and speed；
Step 7. works as CO in tail gas2Discharge capacity reaches 8~15%, O2When discharge capacity reaches 1~4%, stratum cracking is stablized,
Gas injection rate is increased using air compressor system, increases by 15~25% on original gas injection rate and carries out strong high-pressure gas injection, keep cracking quick
It promotes, quickly supplements strata pressure, with the continuous raising of landing surface ability and strata pressure, crude oil is pushed to be flowed to producing well direction
It moves and produces, while energy opposite side water, bottom water play control action.
Preferably, in step 1 when completion, successively in lower going-into-well component sequence be horn mouth, packer, safety valve, sliding sleeve,
Compensator, with oil pipe together lower going-into-well bottom, more than horn mouth tripping in artificial bottom of a well 2~5 meters, more than lower rock stratum 5~10
At rice, perforated interval middle and lower part, packer location is adjusted to more than overlying rock 2~5 meters, and safety valve is adjusted to 10 on packer~
At 20 meters, sliding sleeve is adjusted at 10~15 meters of safety valve top, after whole component tripping in carry out packer seal, packer with
Sleeve closure forms enclosure space, injection air is made to ensure to be designed as required into oil reservoir.
Preferably, the mass percent of oxygen is 60% in the oxygen-rich mixture injected in step 4；
Preferably, the gas injection pressure of the strong high-pressure gas injection of step 3,5 and 7 is 25~50Mpa.
The dominant mechanism that oxygen-rich mixture transformation stratum is injected into oil reservoir is, after oxygen enters stratum, the ground with crude oil
Layer water (have certain salinity) and buried hill rock react and reservoir temperature is high, generate free radicals, have it is automatic from
Oxidation is fired, the reaction of oxyradical can be divided mainly into three steps：Cause, increase and terminates：
Cause：Formation rock → ROO
Increase：RO2·+R/H→ROOH+R·/R·/+·O2→R/OO·
It terminates：2R/OO → torpescence substance
Formation rock system absorbs energy, generates peroxy radical R/OO and replaces the functionalized cationic adsorbed originally
Group forms free radical R/ and hydroperoxidation group ROOH, at this point, free radical is combined with oxygen in rock system, forms peroxide certainly
By base, such process is repeated multiple times, will show hydrophily in the earth formation.Due to the presence of water flooding, will be formed in mantle of rock
One layer of hydration shell, makes crude oil gradually remove, it is easier to be plucked out of.Original formation pressure will be increased substantially by injecting air simultaneously,
Supplement stratum energy, enhancing elasticity, mobility.
The present invention this have the advantage that compared with prior art：
1. tradition is recovered the oil relatively, the present invention has carried out note initiator early period (sodium sarcosinate and mannitol) and air, is drawing
Under the action of sending out agent, oxygen through the air is transformed buried hill formation, by oxygen and water flooding and Fracture System,
The crude oil of script colloid, heavy is cracked under formation temperature effect through Strong oxdiative, is greatly improved by the concerted reaction of rock mass
The rate of oil production and recovery ratio that follow-up air drives, and energy can be effectively supplemented, renwing stratum reset pressure.
2. being denitrogenated by air, isolates oxygen-rich mixture injection stratum and lights a fire, reduce the oxidative cracking reaction time,
Realize quick oxicracking, effectively avoid the excessively high generation gas channeling phenomenon of nitrogen content, and can effective explosion-proof, anti-corrosion, to greatest extent
It ensure that safety work.
3. subsequently persistently inject strong pressure-air for a long time, it is difficult the crude oil employed originally that can effectively produce, originally by water logging,
Oil recovery energy deficiency can all carry out air injection complex oil displacing.
4. by injecting air for a long time, top of oil horizon forms artificial gas cap, applies to oil reservoir and increases pressure downwards, constantly
Stratum energy is supplemented, realizes multinomial mixed phase complex oil displacing and gravity auxiliary oil drainage.
5. in completion mode, bell-mouthed tripping in position and horn mouth and packer with the use of can make the first slug,
Second slug more effectively injects stratum, to improve the service efficiency of gas.
6. carrying out strong high-pressure gas injection to stratum with the pressure of 25~50MPa, diffusion velocity can be improved, further increases and adopts
Yield.
7. after stratum, which cracks, stablizes, increases gas injection rate and carry out strong high-pressure gas injection, so that cracking is quickly propelled, quickly addedly
Stressor layer applies immense pressure to edge-bottom water system, and by edge-bottom water passage plugging, solving buried hill reservoir edge-bottom water influences water logging
The problem of oil reservoir, can be improved oil recovery, realize the efficient displacement of reservoir oil.
The present invention is suitable for straight well, horizontal well, SAGD wells, has stronger adaptability.
Description of the drawings
Fig. 1：Completion schematic diagram
Fig. 2：Initiator sphere of action schematic diagram
In figure：1 sliding sleeve；2 casings；3 safety valves；4 oil pipes；5 packers；6 overlying rocks；7 perforated intervals；8 horn mouths；9 people
Work shaft bottom；10 times rock stratums；11 oil reservoirs；12 air compressor systems；13 compensators；14 nitrogen removal systems；15 initiator sphere of actions；16
Ground；17 buried hills area；19 pneumatic jacks.
Specific implementation mode
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now illustrate that the present invention's is specific
Embodiment.
Embodiment 1
It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, include the following steps：
Step 1. carries out high-pressure gas injection well completion to gas injection well first, as shown in Figure 1, component sequence is in lower going-into-well successively
Horn mouth (8), packer (5), safety valve (3), sliding sleeve (1), compensator (13), with oil pipe (4) together lower going-into-well bottom, loudspeaker
More than mouthful tripping in artificial bottom of a well (9) 4 meters, more than lower rock stratum (10) at 7 meters, perforated interval (7) middle and lower part, packer location tune
At whole to more than overlying rock (6) 3 meters, safety valve is adjusted on packer at 18 meters, and sliding sleeve is adjusted at 10 meters of safety valve top, entirely
It carries out packer after portion's component tripping in seal, packer is sealed with casing (2), forms enclosure space.
0.05PV sodium sarcosinates and mannitol mixture, sodium sarcosinate and sweet dew are injected after step 2. completion into gas injection well
The mass ratio of alcohol is 1: 2, and confection is soluble in water, mass percent 3%.
Step 3. injects 30,000 mark side's air, gas injection pressure 30Mpa by gas injection well to stratum.
Step 4. isolates oxygen-rich mixture (quality percentage as shown in Fig. 2, denitrogenate air by nitrogen removal system (14)
Than for oxygen 60%, nitrogen 40%), by 30,000 mark side of oxygen-rich mixture injection oil reservoir (11).
Step 5. carries out strong high pressure air injection (30Mpa), with the lasting injection of strong pressure-air, oxidative cracking reaction production
Raw CO2With nitrogen pneumatic jack (19) is formed in top of oil horizon.
Step 6. examines oxygen discharge capacity in tail gas by producing well, calculates underground cracking situation and speed.
Step 7. works as CO in tail gas2Discharge capacity 10%, O2When discharge capacity 1%, stratum cracking is stablized, using air compressor system
(12) gas injection rate is increased, increases by 15% on original gas injection rate and carries out strong high-pressure gas injection (30Mpa), so that cracking is quickly propelled, push away
Dynamic crude oil is flowed and is produced to producing well direction, while opposite side water, bottom water play control action.
Embodiment 2
It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, include the following steps：
Step 1. carries out high-pressure gas injection well completion to gas injection well first, as shown in Figure 1, component sequence is in lower going-into-well successively
Horn mouth (8), packer (5), safety valve (3), sliding sleeve (1), compensator (13), with oil pipe (4) together lower going-into-well bottom, loudspeaker
More than mouthful tripping in artificial bottom of a well (9) 5 meters, more than lower rock stratum (10) at 10 meters, perforated interval (7) middle and lower part, packer location
It adjusting at more than overlying rock (6) 5 meters, safety valve is adjusted on packer at 15 meters, and sliding sleeve is adjusted at 10 meters of safety valve top,
It carries out packer after whole component tripping in seal, packer is sealed with casing (2), forms enclosure space.
0.1PV sodium sarcosinates and mannitol mixture, sodium sarcosinate and sweet dew are injected after step 2. completion into gas injection well
The mass ratio of alcohol is 1: 3, and confection is soluble in water, mass percent 2%.
Step 3. injects 40,000 mark side's air, gas injection pressure 40Mpa by gas injection well to stratum.
Step 4. isolates oxygen-rich mixture (quality percentage as shown in Fig. 2, denitrogenate air by nitrogen removal system (14)
Than for oxygen 50%, nitrogen 50%), by 40,000 mark side of oxygen-rich mixture injection oil reservoir (11).
Step 5. carries out strong high pressure air injection (40Mpa), with the lasting injection of strong pressure-air, oxidative cracking reaction production
Raw CO2With nitrogen pneumatic jack (19) is formed in top of oil horizon.
Step 6. examines oxygen discharge capacity in tail gas by producing well, calculates underground cracking situation and speed.
Step 7. works as CO in tail gas2Discharge capacity 8.5%, O2When discharge capacity 3%, stratum cracking is stablized, using air compressor system
(12) gas injection rate is increased, increases by 15% on original gas injection rate and carries out strong high-pressure gas injection (40Mpa), so that cracking is quickly propelled, push away
Dynamic crude oil is flowed and is produced to producing well direction, while opposite side water, bottom water play control action..
Embodiment 3
It is a kind of to note strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, include the following steps：
Step 1. carries out high-pressure gas injection well completion to gas injection well first, as shown in Figure 1, component sequence is in lower going-into-well successively
Horn mouth (8), packer (5), safety valve (3), sliding sleeve (1), compensator (13), with oil pipe (4) together lower going-into-well bottom, loudspeaker
More than mouthful tripping in artificial bottom of a well (9) 3 meters, more than lower rock stratum (10) at 5 meters, perforated interval (7) middle and lower part, packer location tune
At whole to more than overlying rock (6) 4 meters, safety valve is adjusted on packer at 15 meters, and sliding sleeve is adjusted at 10 meters of safety valve top, entirely
It carries out packer after portion's component tripping in seal, packer is sealed with casing (2), forms enclosure space.
0.15PV sodium sarcosinates and mannitol mixture, sodium sarcosinate and sweet dew are injected after step 2. completion into gas injection well
The mass ratio of alcohol is 1: 4, and confection is soluble in water, mass percent 5%.
Step 3. injects 50,000 mark side's air, gas injection pressure 50Mpa by gas injection well to stratum.
Step 4. isolates oxygen-rich mixture (quality percentage as shown in Fig. 2, denitrogenate air by nitrogen removal system (14)
Than for oxygen 50%, nitrogen 50%), by 50,000 mark side of oxygen-rich mixture injection oil reservoir (11).
Step 5. carries out strong high pressure air injection (50Mpa), with the lasting injection of strong pressure-air, oxidative cracking reaction production
Raw CO2Pneumatic jack (19) is formed in top of oil horizon with nitrogen, applies downward immense pressure to oil reservoir, it is continuous to supplement stratum energy
Amount.
Step 6. examines oxygen discharge capacity in tail gas by producing well, calculates underground cracking situation and speed.
Step 7. works as CO in tail gas2Discharge capacity 8%, O2When discharge capacity 3%, stratum cracking is stablized, using air compressor system
(12) gas injection rate is increased, increases by 15% on original gas injection rate and carries out strong high-pressure gas injection (50Mpa), so that cracking is quickly propelled, push away
Dynamic crude oil is flowed and is produced to producing well direction, while opposite side water, bottom water play control action.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It is thin to illustrate, above is only a specific embodiment of the present invention, it is not intended to limit the scope of protection of the present invention, it is all in the present invention
Spirit and principle within, any modification, equivalent substitution, improvement and etc. done, should be included in protection scope of the present invention it
It is interior.
Claims (3)
1. a kind of noting strong pressure-air, oxygen-enriched flooding method to deep buried hill reservoir, which is characterized in that including following step
Suddenly：
Step 1. carries out high-pressure gas injection well completion to gas injection well first；
0.05~0.15PV sodium sarcosinates and mannitol mixture, wherein sodium sarcosinate are injected after step 2. completion into gas injection well
Mass ratio with mannitol is 1: 2~1: 4, and confection is soluble in water, and mass percent is 2%~5%；
Step 3. carries out strong high-pressure gas injection by gas injection well, injects 3~50,000 mark side's air to stratum；
Step 4. is denitrogenated by air, isolates oxygen-rich mixture, and oxygen-rich mixture includes that mass percent is 50~70%
Oxygen and 30~50% nitrogen, by the mark side of oxygen-rich mixture 3~50,000 injection oil reservoir (11)；
Step 5. carries out strong high pressure air injection, the CO that oxidative cracking reaction generates2With nitrogen pneumatic jack (19) is formed in top of oil horizon；
Step 6. examines oxygen discharge capacity in tail gas by producing well, calculates underground cracking situation and speed；
Step 7. works as CO in tail gas2Discharge capacity reaches 8~15%, O2When discharge capacity reaches 1~4%, stratum cracking is stablized, and is used
Air compressor system (12) increases gas injection rate, increases by 15~25% on original gas injection rate and carries out strong high-pressure gas injections, push crude oil to
Producing well direction is flowed and is produced, while opposite side water, bottom water play control action；
The gas injection pressure of the strong high-pressure gas injection of step 3,5 and 7 is 25~50Mpa.
2. a kind of as described in claim 1 note strong pressure-air, oxygen-enriched flooding method, feature to deep buried hill reservoir
It is：In step 1 when completion, component sequence is horn mouth (8), packer (5), safety valve (3), sliding sleeve in lower going-into-well successively
(1), compensator (13), with oil pipe (4) together lower going-into-well bottom, more than horn mouth tripping in artificial bottom of a well (9) 2~5 meters, under cover
More than rock stratum (10) at 5~10 meters, perforated interval (7) middle and lower part, packer location is adjusted to more than overlying rock (6) 2~5 meters
Place, safety valve are adjusted on packer at 10~20 meters, and sliding sleeve is adjusted at 10~15 meters of safety valve top, and whole component tripping in finish
It carries out packer afterwards to seal, packer is sealed with casing (2), forms enclosure space.
3. a kind of as described in claim 1 note strong pressure-air, oxygen-enriched flooding method, feature to deep buried hill reservoir
It is：The mass percent of oxygen is 60% in the oxygen-rich mixture injected in step 4.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456066A (en) * | 1981-12-24 | 1984-06-26 | Mobil Oil Corporation | Visbreaking-enhanced thermal recovery method utilizing high temperature steam |
| CN101122225A (en) * | 2007-07-05 | 2008-02-13 | 尤尼斯油气技术（中国）有限公司 | Fire flooding oil extraction method for oil extraction of vertical well, steam injection and horizontal well |
| CN101864936A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Authigenic carbon dioxide oil displacement recovery ratio technology in oil layer |
| CN202152670U (en) * | 2011-07-08 | 2012-02-29 | 中国石油天然气股份有限公司 | Construction pipe column for horizontal well sectional measure |
| CN102900415A (en) * | 2012-09-25 | 2013-01-30 | 中国石油天然气股份有限公司 | Deep and ultra-deep heavy oil reservoir double-horizontal well fire flooding oil drainage exploitation method |
| CN103939072A (en) * | 2014-05-07 | 2014-07-23 | 邓晓亮 | Liquid oxygen strong-stimulation ignition air-driving high temperature pyrolyzing mixed-phase gas composite oil driving technology |
| CN104594863A (en) * | 2014-11-24 | 2015-05-06 | 中国石油天然气股份有限公司 | Method for enhancing in-situ combustion exploitation of oil reservoir |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008048455A2 (en) * | 2006-10-13 | 2008-04-24 | Exxonmobil Upstream Research Company | Enhanced shale oil production by in situ heating using hydraulically fractured producing wells |
-
2016
- 2016-08-01 CN CN201610623446.9A patent/CN106223911B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4456066A (en) * | 1981-12-24 | 1984-06-26 | Mobil Oil Corporation | Visbreaking-enhanced thermal recovery method utilizing high temperature steam |
| CN101122225A (en) * | 2007-07-05 | 2008-02-13 | 尤尼斯油气技术（中国）有限公司 | Fire flooding oil extraction method for oil extraction of vertical well, steam injection and horizontal well |
| CN101864936A (en) * | 2010-03-23 | 2010-10-20 | 邓惠荣 | Authigenic carbon dioxide oil displacement recovery ratio technology in oil layer |
| CN202152670U (en) * | 2011-07-08 | 2012-02-29 | 中国石油天然气股份有限公司 | Construction pipe column for horizontal well sectional measure |
| CN102900415A (en) * | 2012-09-25 | 2013-01-30 | 中国石油天然气股份有限公司 | Deep and ultra-deep heavy oil reservoir double-horizontal well fire flooding oil drainage exploitation method |
| CN103939072A (en) * | 2014-05-07 | 2014-07-23 | 邓晓亮 | Liquid oxygen strong-stimulation ignition air-driving high temperature pyrolyzing mixed-phase gas composite oil driving technology |
| CN104594863A (en) * | 2014-11-24 | 2015-05-06 | 中国石油天然气股份有限公司 | Method for enhancing in-situ combustion exploitation of oil reservoir |
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