CN101328798B - Method for exploiting thick oil - Google Patents
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- CN101328798B CN101328798B CN2008101174876A CN200810117487A CN101328798B CN 101328798 B CN101328798 B CN 101328798B CN 2008101174876 A CN2008101174876 A CN 2008101174876A CN 200810117487 A CN200810117487 A CN 200810117487A CN 101328798 B CN101328798 B CN 101328798B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003921 oil Substances 0.000 claims abstract description 78
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 238000000605 extraction Methods 0.000 claims abstract description 25
- 239000003129 oil well Substances 0.000 claims abstract description 21
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 238000011084 recovery Methods 0.000 claims abstract description 12
- 239000000295 fuel oil Substances 0.000 claims abstract description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 48
- 238000003756 stirring Methods 0.000 claims description 28
- 239000004698 Polyethylene Substances 0.000 claims description 24
- 229920000768 polyamine Polymers 0.000 claims description 24
- 229920000573 polyethylene Polymers 0.000 claims description 24
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 claims description 24
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 23
- -1 polyethylene Polymers 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 210000003298 dental enamel Anatomy 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- UDHMTPILEWBIQI-UHFFFAOYSA-N butyl naphthalene-1-sulfonate;sodium Chemical class [Na].C1=CC=C2C(S(=O)(=O)OCCCC)=CC=CC2=C1 UDHMTPILEWBIQI-UHFFFAOYSA-N 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 6
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000008096 xylene Substances 0.000 claims description 4
- 150000003738 xylenes Chemical class 0.000 claims description 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 3
- 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 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 abstract description 10
- 239000010779 crude oil Substances 0.000 abstract description 9
- 239000000126 substance Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 7
- 238000007710 freezing Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 239000010426 asphalt Substances 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000001993 wax Substances 0.000 description 2
- 238000010793 Steam injection (oil industry) Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The cold heavy oil extracting method is used in the normal temperature and pressure extraction of heavy oil deposit in oil field. Is characterized in that: a. preparing a water-soluble viscosity reducer I; b. preparing a viscosity reducer II; c. preparing a viscosity reducer III; d. extruding a water-soluble viscosity reducer I into an oil layer; e. lifting the produced well fluid by adopting a pumping unit or a screw pump lifting device; and respectively adding a shaft viscosity reducer II or a shaft viscosity reducer III from the annular space between the oil pipe of the oil well and the casing according to different viscosities of the crude oil of the produced liquid. The effect is as follows: the viscosity of the thick oil in the oil layer is reduced by adopting a chemical method, the viscosity of well fluid in a shaft is reduced, and the recovery effect of the thick oil is improved. The continuous production time of the oil well is far longer than that of the exploitation method in the prior art, the production and operation cost is greatly reduced, and the method is obviously superior to the prior thick oil exploitation technology.
Description
Technical field
The present invention relates to the oil field oil production method, particularly a kind of method of thickened oil recovery especially adopts the method crude oil extraction that reduces viscosity of crude.When being applicable to 50 ℃ of ground crude oil, viscosity of crude is 100mPas～10000mPas; Oil density is greater than 0.92g/cm in the time of 20 ℃
3Freezing point is-20 ℃～50 ℃; Gum asphalt is greater than 25%; Sulfur-bearing is greater than 0.2%; Paraffin content is greater than 1.0%, the problem of the exploitation of normal temperature and pressure heavy crude reservoir.
Background technology
At present, the heating exploitation method is the traditional thickened oil recovery method in oil field, and its technological core is through oil reservoir or pit shaft being heated to reduce viscosity of crude, improving the mobile performance of crude oil, to reach the purpose that improves oil well output.Mainly contain methods such as steam injection, accompanying-heat cable, down-hole heating furnace, heating sucker rod, combustion in situ.Show that through production practices for many years its technology is ripe day by day, but ubiquity is invested height, the down-hole situation is complicated, and is high to the exploitation technical requirements, and water at the bottom of thin layer, mutual thin layer oil reservoir and the limit is enlivened problems such as oil reservoir bad adaptability.Therefore, the technician who is engaged in thickened oil recovery with diversion to the cold research of viscous crude with use.
Heavy oil cold flow production is meant the process of using conventional oil well pump and various non-thermal methods heavy crude producings, mainly contains methods such as pit shaft dosing, chemical plugging removal, screw pump, suction pump, air injection, notes nitrogen, caustic waterflooding.
Summary of the invention
The objective of the invention is: a kind of method of thickened oil recovery is provided, the thinner of a series mainly is provided, comprise that at oil well oil reservoir and well wellbore make reducing thick oil viscosity, improve the flowability of viscous crude.Viscosity, freezing point, paraffin content, gum asphaltic content and core intersection, effecive porosity, the permeability of crude oil are utilized 0.2%～2.0% water-soluble thinner I:50m during according to 50 ℃ of viscous crude
3～300m
3After clamp-oning oil reservoir, solve the problem that in-place oil flows into pit shaft; In pit shaft lifting process, when 50 ℃ of viscosity of extraction well liquid during, use thinner II and carry out the drag reduction viscosity reduction less than 5000mPa.s, when 50 ℃ of viscosity of extraction well liquid during greater than 5000mPa.s, thinner III,, utilize thinner III to carry out the drag reduction viscosity reduction.When realizing 50 ℃, ground viscosity of crude: 100mPas～10000mPas; In the time of 20 ℃, oil density is greater than 0.92g/cm
3Freezing point :-20 ℃～50 ℃; Gum asphalt is greater than 25%; Sulfur-bearing is greater than 0.2%; Paraffin content greater than: 1.0% the viscous crude crude oil of heavy crude reservoir is at normal temperatures and pressures more effectively exploited.
The technical scheme that the present invention is taked for its technical problem of solution is:
A kind of method of heavy oil cold flow production, the step of implementing this method is following:
1, the water-soluble thinner I of preparation: each components by weight of water-soluble thinner I: 3～5% NaOH; 2～6% polyethylene polyamine polyoxyethylene polyoxypropylene ether I; 8～10% sodium carbonate, 2～3.5% sodium butylnaphthalenesulfonates, 2～4.5% sodium acid carbonates; All the other are water, and each component weight percentage sum is 100%.
Capital equipment:
Enamel reaction still with stirring, heating, cooling and vacuum system.
Production method:
At first, NaOH, sodium carbonate and three kinds of raw materials of sodium acid carbonate are added enamel reaction still in proportion.Slowly be warmed up to 50～60 ℃, secondly, add 20% water, after constantly stirring 30 minutes, constantly adding polyethylene polyamine polyoxyethylene polyoxypropylene ether I, sodium butylnaphthalenesulfonate in proportion successively under the condition of stirring then; Add remaining water at last in proportion, stir while adding, stir after 20 minutes, stop heating, be stirred to the normal temperature discharging while cooling off, obtain water-soluble thinner I.
The code name of described polyethylene polyamine polyoxyethylene polyoxypropylene ether I is demulsifier AE7921, production unit: general petrochemical works, Changzhou.Polyethylene polyamine polyoxyethylene polyoxypropylene ether has introduction in " Chinese surfactant overview " (the 473rd page) book of Chemical Industry Press's publication of Huang Hongzhou chief editor.
Described sodium butylnaphthalenesulfonate has introduction in course teaching materials geared to the 21st century " oilfield chemistry " (the 302nd a page) book of Zhao Fulin chief editor's publishing house of China University Of Petroleum Beijing publication.
Described sodium butylnaphthalenesulfonate can adopt 2,6-di-t-butyl sodium naphthalene sulfonate, and consumption is identical.2, the molecular formula of 6-di-t-butyl sodium naphthalene sulfonate is: C18H23SO3Na.
2, preparation thinner II: each components by weight of thinner II: 45～50% crude benzol, 2～4% polyethylene polyamine polyoxyethylene polyoxypropylene ether II, all the other are the 200# solvent naphtha, each component weight percentage sum is 100%.
Above-mentioned crude benzol is the accessory substance (there is sale in market) that reclaims in the coal coking process, and its Main Ingredients and Appearance is benzene (molecular formula C
6H
6), toluene (molecular formula C
7H
8), xylenes (molecular formula C
8H
10).Therefore, the crude benzol among the present invention can adopt benzene, toluene or xylenes to replace.Crude benzol, benzene, toluene and xylenes all are good liquid fluxs, and use amount is identical.
Capital equipment:
Normal pressure enamel reaction still with stirring, heating, cooling and vacuum system.
Production method:
Crude benzol, polyethylene polyamine polyoxyethylene polyoxypropylene ether II and three kinds of components of 200# solvent naphtha are added enamel reaction still in proportion, and the limit edged stirs, and adds material and stirs after 60 minutes again and stop to stir discharging, obtains thinner II.
The code name of described polyethylene polyamine polyoxyethylene polyoxypropylene ether II is demulsifier AE8051, production unit: shore, Shandong group company.Polyethylene polyamine polyoxyethylene polyoxypropylene ether has introduction in " Chinese surfactant overview " (the 473rd page) book of Chemical Industry Press's publication of Huang Hongzhou chief editor.
3, preparation thinner III: each components by weight of thinner III: 30～35% polyethylene polyamine polyoxyethylene polyoxypropylene ether III, ethyl acetate (the molecular formula C of 5-8%
4H
8O
2), all the other are water, each component weight percentage sum is 100%.
Capital equipment:
Enamel reaction still with stirring, heating, cooling and vacuum system.
Production method:
Ethyl acetate and three kinds of components of water of polyethylene polyamine polyoxyethylene polyoxypropylene ether III, 5-8% are constantly being added enamel reaction still under the condition of stirring in proportion.Slowly be warmed up to 50～60 ℃, stir stop after 60 minutes the heating, be stirred to the normal temperature discharging while cooling off, obtain thinner III.
The code name of described polyethylene polyamine polyoxyethylene polyoxypropylene ether III is demulsifier AP121, production unit: Jinling Petrochemical Co.'s chemical industry two factories.Polyethylene polyamine polyoxyethylene polyoxypropylene ether has introduction in " Chinese surfactant overview " (the 471st page) book of Chemical Industry Press's publication of Huang Hongzhou chief editor.
4, oil reservoir is clamp-oned liquid and clamp-on oil reservoir: water and water-soluble thinner I be by weight being 100: 0.2～2.0, mixes to be mixed with oil reservoir and to clamp-on liquid; With 50m
3～300m
3Oil reservoir clamp-on liquid and clamp-on oil reservoir, built the pressure 24～48 hours.
Oil reservoir makes the reducing thick oil viscosity in the oil reservoir after clamp-oning liquid entering oil reservoir, improves the flowability of viscous crude in the oil reservoir, and the viscous crude that solves oilbearing stratum flows into the problem of pit shaft difficulty.It is the method commonly used that down-hole, oil field constructor knows that oil reservoir is clamp-oned the liquid method of clamp-oning oil reservoir and the method for building the pressure, and does not introduce in detail.
5, adopt oil pumper or screw pump lifting equipment lifting extraction well liquid; And the viscosity when detecting 50 ℃ of extraction well liquid.Oil pumper or screw pump lifting extraction well liquid viscosity method when detecting 50 ℃ of extraction well liquid is that those skilled in the art know technology, does not introduce in detail.
When 50 ℃ of viscosity of extraction well liquid during, add thinner II from the annular space between oil well oil conduit and the sleeve pipe, the extraction of lifting simultaneously well liquid less than 5000mPa.s.The adding weight of thinner II and oil well liquid-producing volume ratio are 600～800 milligrams: 1 liter.Such as: oil well liquid-producing is 10m
3/ d, the dosing cycle is 7 days, 7 days production fluid amount adds up to 70m so
3, adding dose so is 42kg～56kg.If the dosing cycle is 10 days, 10 days production fluid amount adds up to 100m so
3, adding dose so is 60kg～80kg.
When 50 ℃ of viscosity of extraction well liquid during, add thinner III from the annular space between oil well oil conduit and the sleeve pipe, the extraction of lifting simultaneously well liquid greater than 5000mPa.s.The adding weight of thinner III liquid and oil well liquid-producing volume ratio are 400～600 milligrams: 1 liter.
The component of 3 same being named as of use " polyethylene polyamine polyoxyethylene polyoxypropylene ether " has a plurality of products all to be this name in the above-mentioned explanation on the market.Their manufacturer is different, and molecular weight is also different, and the product code name is different.For using same name " polyethylene polyamine polyoxyethylene polyoxypropylene ether " component to distinguish, after " polyethylene polyamine polyoxyethylene polyoxypropylene ether ", be marked with the differentiation symbol of I, II or III to 3 times.
Adding the thinner method from the annular space between oil well oil conduit and the sleeve pipe is that those skilled in the art know technology, does not introduce in detail.
Beneficial effect of the present invention: the thickened oil recovery method that the present invention adopts is different with existing thickened oil recovery method.Adopt chemical method to make reducing thick oil viscosity in the oil reservoir, improve the flowability of viscous crude in the oil reservoir, the viscous crude that solves oilbearing stratum flows into the problem of pit shaft difficulty; And distinguish the viscosity of 50 ℃ of extraction well liquid, and add different pit shaft property drag reduction viscosity reduction liquid from oil well oil conduit with annular space between the sleeve pipe, reduce the viscosity of well liquid in the pit shaft, improve the thickened oil recovery effect.The continuous production time of oil well is far longer than the exploitation method of prior art, and the production run cost reduces significantly, obviously is superior to existing thickened oil recovery technology.On average descending the pump degree of depth at the middle and south, North China Oilfield Ji heavy crude reservoir is to test in 54 mouthfuls of heavy oil wells of 1439m, adds up the crude oil 52.940 * 10 of producing more
4Ton.The average pump detection period of individual well 816 days.
The specific embodiment
Utilize the present invention in North China Oilfield is recovered the oil a plurality of heavy crude reservoirs of five factories, to test, all receive significant development effectiveness.With the Shen Nan oil field is that example describes.
Embodiment 1: pool 70 heavy crude reservoirs in Shen Nan oil field, and oil reservoir is being grown Qp from top to bottom, Nm, Ng, Ed and Es stratum, oil reservoir mainly is distributed in Ed, dark 2400m during oil reservoir is average, its reservoir physical property is: degree of porosity is: 15%～25.5%; Permeability is: 208 * 10
-3～2290 * 10
-3μ m
2Ground viscosity of crude: (50 ℃) 1157～85085mPa.s; 20 ℃ of oil density: 0.9442～1.0035g/cm
3Freezing point: 20～40 ℃; Gum asphalt: 29.38%～71.23%; Sulfur-bearing: 0.4%～0.82%; The content of wax: 1.56～10.75%; Oil reservoir average temperature: 93.4 ℃; Geothermal gradient: 3.34 ℃/100m; Original formation pressure: 23.08MPa; Pressure coefficient: 0.99, belong to normal temperature, normal pressure heavy crude reservoir.
When developing this oil reservoir, recording damp 70 fault block viscous crude acid numbers at 1.26～1.85mgKOH/g, belong to strong active viscous crude, taked following steps during practical implementation, is example with damp 70-23 well, further explain.
Pool 70-23 well reservoir physical property is: effecive porosity is: 19.8%; Permeability is: 1042.3 * 10
-3μ m
2, ground viscosity of crude: (50 ℃) 4386.2mPa.s; 20 ℃ of oil density: 0.9985g/cm
3, freezing point: 27 ℃; Gum asphalt: 58.4%; Sulfur-bearing: 0.76%; The content of wax: 7.5%, reservoir temperature: 94.3 ℃, geothermal gradient: 3.34 ℃/100m, original formation pressure: 24.3MPa, pressure coefficient: 0.99; Acid value for crude oil is at 1.57mgKOH/g.
1, the water-soluble thinner I of preparation: each components by weight of water-soluble thinner I: 3.5% NaOH, 4.5% code name demulsifier AE7921,2.8% sodium butylnaphthalenesulfonate, 8.5% sodium carbonate, 3.0% sodium acid carbonate, all the other are water, and each component weight percentage sum is 100%.
At first, NaOH, carbonic acid and three kinds of components of carbonic acid are added enamel reaction still in proportion.Slowly be warmed up to 55 ℃, secondly, add 20% of water consumption, constantly stirring 30 minutes, constantly adding demulsifier AE7921, sodium butylnaphthalenesulfonate in proportion successively under the condition of stirring then; Add remaining water at last in proportion, stir while adding, stir after 20 minutes, stop heating, be stirred to the normal temperature discharging while cooling off, obtain water-soluble thinner I.
2, water-soluble thinner I is clamp-oned oil reservoir: water and water-soluble thinner I be by weight being 100: 1.2, mixes to be mixed with oil reservoir and to clamp-on liquid; With 150m
3Oil reservoir clamp-on liquid and clamp-on oil reservoir; Built the pressure 30 hours.
3, adopt lifting equipment oil pumper lifting extraction well liquid; And detect the viscosity obtain 50 ℃ of extraction well liquid be 4834mPa.s (because of sample time different, the viscosity number of mensuration has certain fluctuation);
4, preparation thinner II: each components by weight of thinner II: 47.5% crude benzol, 3.0% demulsifier AE8051, all the other are the 200# solvent naphtha, each component weight percentage sum is 100%.
The method for preparing oil-soluble viscosity reducer II: crude benzol, demulsifier AE8051 and three kinds of components of 200# solvent naphtha are added enamel reaction still in proportion, and the limit edged stirs, and adds material and stirs after 60 minutes again and stop to stir discharging, obtains oil-soluble viscosity reducer II.
5, last, add oil-soluble viscosity reducer II from the annular space between oil well oil conduit and the sleeve pipe, the extraction of lifting simultaneously well liquid.The adding weight of oil-soluble viscosity reducer II and oil well liquid-producing volume ratio are 700 milligrams: 1 liter.
Embodiment 2: damp 70-25 well, ground viscosity of crude: (50 ℃) 9886.2mPa.s;
1, adopts the step 1 of embodiment 1.
2, adopt the step 2 of embodiment 1.
3, adopt lifting equipment oil pumper lifting extraction well liquid; And detect the viscosity obtain 50 ℃ of extraction be 9812.3mPa.s (because of sample time different, the viscosity number of mensuration has certain fluctuation);
4, preparation thinner III: each components by weight of thinner III: 32% demulsifier AP121,6.2% ethyl acetate, all the other are water, and each component weight percentage sum is 100%.
The method for preparing thinner III: demulsifier AP121, ethyl acetate and three kinds of components of water are constantly being added enamel reaction still under the condition of stirring in proportion.Slowly be warmed up to 55 ℃, stir stop after 60 minutes the heating, be stirred to the normal temperature discharging while cooling off, obtain thinner III.
5, add thinner III from the annular space between oil well oil conduit and the sleeve pipe, the extraction of lifting simultaneously well liquid.The adding weight of thinner III liquid and oil well liquid-producing volume ratio are 430 milligrams: 1 liter.
In adopting thickened oil recovery process of the present invention, the drag reduction viscosity break ratio reaches more than 75%, and on average descend the pump degree of depth at the middle and south, North China Oilfield Ji heavy crude reservoir is to test in 54 mouthfuls of heavy oil wells of 1439m, adds up many production crude oil 52.940 * 10
4Ton.The average pump detection period of individual well 816 days.
Embodiment 3-5: each weight percentages of components is tabulated as follows: each component weight percentage sum is 100%.(what adopt among the embodiment 5 is 2,6-di-t-butyl sodium naphthalene sulfonate)
Claims (5)
1. the method for a heavy oil cold flow production, it is characterized in that: the step of this method is following:
A, the water-soluble thinner I of preparation: each components by weight of water-soluble thinner I: 3～5% NaOH, 2～6% polyethylene polyamine polyoxyethylene polyoxypropylene ether I, 8～10% sodium carbonate, 2～3.5% sodium butylnaphthalenesulfonates, 2～4.5% sodium acid carbonates; All the other are water, and each component weight percentage sum is 100%;
The method for preparing water-soluble thinner I:
At first, NaOH, sodium carbonate and three kinds of components of sodium acid carbonate are added enamel reaction still in proportion; Slowly be warmed up to 50～60 ℃, secondly, add 20% water, stirred 30 minutes, constantly adding polyethylene polyamine polyoxyethylene polyoxypropylene ether I, sodium butylnaphthalenesulfonate in proportion successively under the condition of stirring then; Add remaining water at last in proportion, stir while adding, stirred 20 minutes, stop heating, be stirred to the normal temperature discharging while cooling off, obtain water-soluble thinner I;
B, preparation thinner II: each components by weight of thinner II: 45～50% crude benzol, 2～4% polyethylene polyamine polyoxyethylene polyoxypropylene ether II, all the other are the 200# solvent naphtha, each component weight percentage sum is 100%;
The method for preparing thinner II:
Crude benzol, polyethylene polyamine polyoxyethylene polyoxypropylene ether II and three kinds of raw materials of 200# solvent naphtha are added enamel reaction still in proportion, and the limit edged stirs, and adds material and stirs after 60 minutes again and stop to stir discharging, obtains thinner II;
C, preparation thinner III: each components by weight of thinner III: 30～35% polyethylene polyamine polyoxyethylene polyoxypropylene ether III, the ethyl acetate of 5-8%, all the other are water, and each component weight percentage sum is 100%;
The method for preparing thinner III:
Ethyl acetate and three kinds of components of water of polyethylene polyamine polyoxyethylene polyoxypropylene ether III, 5-8% are constantly being added enamel reaction still under the condition of stirring in proportion; Slowly be warmed up to 50～60 ℃, stir stopped in 60 minutes the heating, be stirred to the normal temperature discharging while cooling off, obtain thinner III;
D, oil reservoir is clamp-oned liquid clamp-on oil reservoir: water and water-soluble thinner I be by weight being 100: 0.2～2.0, mixes to be mixed with oil reservoir and to clamp-on liquid; With 50m
3～300m
3Oil reservoir clamp-on liquid and clamp-on oil reservoir, built the pressure 24～48 hours;
E, oil recovery: adopt oil pumper or screw pump lifting equipment lifting extraction well liquid; And the viscosity when detecting 50 ℃ of extraction well liquid;
50 ℃ of viscosity of extraction well liquid add thinner II from the annular space between oil well oil conduit and the sleeve pipe during less than 5000mPa.s, the extraction of lifting simultaneously well liquid; The adding weight of thinner II and oil well liquid-producing volume ratio are 600～800 milligrams: 1 liter;
Or 50 ℃ of viscosity of extraction well liquid add thinner III from the annular space between oil well oil conduit and the sleeve pipe during greater than 5000mPa.s, the extraction of lifting simultaneously well liquid; The adding weight of thinner III liquid and oil well liquid-producing volume ratio are 400～600 milligrams: 1 liter;
The code name of polyethylene polyamine polyoxyethylene polyoxypropylene ether I is demulsifier AE7921;
The code name of polyethylene polyamine polyoxyethylene polyoxypropylene ether II is demulsifier AE8051;
The code name of polyethylene polyamine polyoxyethylene polyoxypropylene ether III is demulsifier AP121.
2. the method for heavy oil cold flow production as claimed in claim 1, it is characterized in that: described crude benzol is a benzene.
3. the method for heavy oil cold flow production as claimed in claim 1, it is characterized in that: described crude benzol is a toluene.
4. the method for heavy oil cold flow production as claimed in claim 1, it is characterized in that: described crude benzol is an xylenes.
5. like the method for claim 1,2,3 or 4 described heavy oil cold flow productions, it is characterized in that: described sodium butylnaphthalenesulfonate is 2,6-di-t-butyl sodium naphthalene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101174876A CN101328798B (en) | 2008-07-31 | 2008-07-31 | Method for exploiting thick oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101174876A CN101328798B (en) | 2008-07-31 | 2008-07-31 | Method for exploiting thick oil |
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| Publication Number | Publication Date |
|---|---|
| CN101328798A CN101328798A (en) | 2008-12-24 |
| CN101328798B true CN101328798B (en) | 2012-03-07 |
Family
ID=40204788
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|---|---|---|---|
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106893572A (en) * | 2017-03-13 | 2017-06-27 | 中山市绿浪助剂有限公司 | A kind of heavy oil cold flow production auxiliary agent |
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| CN101852073B (en) * | 2009-11-13 | 2013-01-16 | 新疆德蓝股份有限公司 | Novel integration technique for improving recovery ratio of thick oil with high thickness and low yield |
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| CN102635343B (en) * | 2012-04-13 | 2014-11-19 | 中国石油天然气股份有限公司 | Method for lifting thick oil from thick oil cold production well shaft |
| CN102852489B (en) * | 2012-09-04 | 2014-11-26 | 中国石油天然气股份有限公司 | Method for treating cold oil production layer of heavy oil |
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| CN106988714B (en) * | 2017-04-10 | 2019-10-18 | 中国石油化工股份有限公司 | A kind of super-viscous oil drop sticking method |
| CN107143319A (en) * | 2017-06-29 | 2017-09-08 | 新疆科力新技术发展股份有限公司 | The cold method adopted of shallow oil reservoir reducing thick oil viscosity |
| CN107893648B (en) * | 2017-12-19 | 2019-06-18 | 北京百利时能源技术股份有限公司 | The cold mining method of heavy crude reservoir carbon dioxide accumulation of energy high pressure viscosity reduction |
| CN109973064A (en) * | 2019-03-26 | 2019-07-05 | 长沙而道新能源科技有限公司 | A kind of oil exploitation method |
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