CN102504788B - Foaming agent suitable for oilfield development - Google Patents
Foaming agent suitable for oilfield development Download PDFInfo
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- CN102504788B CN102504788B CN 201110327276 CN201110327276A CN102504788B CN 102504788 B CN102504788 B CN 102504788B CN 201110327276 CN201110327276 CN 201110327276 CN 201110327276 A CN201110327276 A CN 201110327276A CN 102504788 B CN102504788 B CN 102504788B
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- 238000011161 development Methods 0.000 title claims abstract description 13
- 239000004088 foaming agent Substances 0.000 title abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910017053 inorganic salt Inorganic materials 0.000 claims abstract description 8
- 239000003381 stabilizer Substances 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 46
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 claims description 14
- -1 alkylbenzene sulfonate Chemical class 0.000 claims description 12
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 claims description 10
- 229920002401 polyacrylamide Polymers 0.000 claims description 9
- 239000004094 surface-active agent Substances 0.000 claims description 9
- 239000004711 α-olefin Substances 0.000 claims description 9
- 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 7
- 239000011734 sodium Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 7
- 125000005233 alkylalcohol group Chemical group 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 5
- 239000001110 calcium chloride Substances 0.000 claims description 5
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 5
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 239000002563 ionic surfactant Substances 0.000 claims description 4
- 150000001408 amides Chemical class 0.000 claims description 3
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 150000001412 amines Chemical class 0.000 claims description 2
- 150000001413 amino acids Chemical class 0.000 claims description 2
- JPNZKPRONVOMLL-UHFFFAOYSA-N azane;octadecanoic acid Chemical compound [NH4+].CCCCCCCCCCCCCCCCCC([O-])=O JPNZKPRONVOMLL-UHFFFAOYSA-N 0.000 claims description 2
- 150000002191 fatty alcohols Chemical class 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 239000003208 petroleum Substances 0.000 claims description 2
- 239000010865 sewage Substances 0.000 claims description 2
- 235000017550 sodium carbonate Nutrition 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- ZNRSXPDDVNZGEN-UHFFFAOYSA-K trisodium;chloride;sulfate Chemical compound [Na+].[Na+].[Na+].[Cl-].[O-]S([O-])(=O)=O ZNRSXPDDVNZGEN-UHFFFAOYSA-K 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 52
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- 239000003945 anionic surfactant Substances 0.000 abstract 1
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 3
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- 241000024287 Areas Species 0.000 description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
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- 125000005599 alkyl carboxylate group Chemical group 0.000 description 1
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- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
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- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention provides a foaming agent suitable for oilfield development. The foaming agent suitable for oilfield development comprises the following components in percentage by mass: 0.05-1.0 wt% of anionic surfactant, 0.05-1.0 wt% of zwitterionic surfactant, 0-1.0 wt% of nonionic surfactant, 0.01-1.0 wt% of foam stabilizer, 0-0.8 wt% of inorganic salt and the balance of water. The foaming agent can adjust the composition and the proportion of the foaming agent at any time according to the actual conditions of different application fields in oil field development, is convenient to produce, has wide adaptability and obvious economic benefit, does not pollute the environment, does not damage the stratum and has good biodegradability.
Description
Technical field
The present invention relates to the oilfield chemical technology field, particularly a kind of whipping agent for oil field foam profile control, the displacement of reservoir oil, drilling well and water pumping gas production.
Background technology
Since proposing first with the thought of foam as mobility control agent in 1958, domestic and international many research institutions have carried out 40 years of researches to foam technology.Foam is used widely in the displacement of reservoir oil, profile control, pressure break and drilling operation at present.Foam is a kind of dispersion system that gas forms in liquid phase under the whipping agent effect, the major cause that foam has profile control, displacement of reservoir oil effect is the seepage characteristic of foam in porous medium, be " stifled very much not stifled little, the not stifled oil of water blockoff " effect of foam, cause foam in high and low pervious course, evenly to advance.Simultaneously, foam also has certain washing oil ability, thereby foam has the effect that significantly improves recovery ratio.
Foam also is widely used in drilling well and the water pumping gas production, and the most of oil gas-field exploitation is to the middle and later periods, and reservoir pressure descends.Adopting foam drilling is best selection, can improve drilling speed, reduce reservoir damage.And the gas recovery well gas production rate reduces, and the problems such as water logging occur.Foam drainage gas recovery is simple owing to technique, less investment, instant effect, do not affect to produce and be widely used.
The key problem in technology that foam is used in oil-field development is the foaming properties of whipping agent, and the public patent major part of using in the oil field about foam all is confined to the single application field at present, can not be applicable to simultaneously a plurality of Application Areass.A kind of prescription for foam flooding and method are provided such as 98813947.2,91103859.0 disclose a kind of foam system for profile control, 200910016512.6 disclose a kind of pore forming material for the heavy crude reservoir displacement of reservoir oil, 200810045167.4 disclose a kind of whipping agent preparation method of used for oil gas field drilling and extracting etc.This has limited the widespread use of foam in oil-field development to a certain extent.The invention provides a kind of whipping agent that is applicable to foam profile control, the displacement of reservoir oil, drilling well and water pumping gas production, its cost is low, free from environmental pollution, do not damage the stratum, is with a wide range of applications.
Summary of the invention
The object of the present invention is to provide a kind of whipping agent that is applicable to foam profile control, the displacement of reservoir oil, drilling well and water pumping gas production in the oil-field development.It can adjust composition and the proportioning of whipping agent according to the actual requirements, makes it be applicable to Application Areass different in the oil-field development.
Technical scheme of the present invention is: this is applicable to the whipping agent of oil-field development, consist of by mass percentage: aniorfic surfactant content is 0.05～1.0wt%, amphoteric ionic surfactant content is 0.05～1.0wt%, nonionic surface active agent content is 0～1.0wt%, suds-stabilizing agent content is 0.01～1.0wt%, inorganic salt content is 0～0.8wt%, and surplus is water.
Aniorfic surfactant in the whipping agent of the present invention can be following one or more mixing: alkyl-sulphate, alkyl alcohol polyoxyethylene ether sulfate, alkylbenzene sulfonate, sulfonated α-olefin, sulfonated petro-leum, alkyl carboxylate; Amphoteric ionic surfactant can be following one or more mixing: alkyl betaine, sultaine, amino acid pattern; Nonionic surface active agent can be following one or more mixing: alkyl alcohol Soxylat A 25-7, alkylol amide, alkylol amide Soxylat A 25-7, alkyl polyglycoside, amine oxide type.Utilize the composite effect that can play synergy of anionic, amphoteric ion type and nonionic surface active agent, its foaming properties is better than single tensio-active agent, and compound system can reduce Financial cost simultaneously.
Suds-stabilizing agent in the whipping agent of the present invention can be following one or more mixing: polyacrylamide, Zulkovsky starch, modification guanidine glue, Mierocrystalline cellulose, high fatty alcohol, stearic acid ammonium salt.In whipping agent, add suds-stabilizing agent and be conducive to increase the foam solution film strength, improve the stability of foam.Suds-stabilizing agent can also reduce tensio-active agent in use because the loss that reservoir rock absorption causes makes tensio-active agent better bring into play its foaming properties simultaneously.
For increasing compatibleness and the adaptability of whipping agent and reservoir fluid, can contain inorganic salt in the whipping agent of the present invention, inorganic salt can be the inorganic salt that contain in the oilfield sewage, also can be following one or more mixing: sodium-chlor, sodium sulfate, sodium bicarbonate, yellow soda ash, Repone K, calcium chloride, magnesium chloride.
The present invention has following beneficial effect: (1) this whipping agent can be adjusted composition and the proportioning of whipping agent at any time according to the practical situation in different application field in the oil-field development, convenient production, wide adaptability.(2) this whipping agent production cost is low, and its whipability and foam stability are good, and the bubble of formation is even; Consumption is few, remarkable in economical benefits.(3) this whipping agent is free from environmental pollution, does not damage the stratum, has good biological degradability, does not contain prohibitive materials.
Description of drawings:
Fig. 1 is foam injection pressure curve.
Embodiment:
Concrete methods of realizing of the present invention may further comprise the steps:
Further describe the present invention by following embodiment, it should be understood that these embodiment only are used for the purpose of explanation, never consist of any limitation of the invention.Select air-flow method foam survey meter and foam flooding device to estimate foaming volume, froth stability, foam profile control and the oil displacement efficiency of whipping agent, implementation is as follows:
Embodiment 1:
With the foam scanner different whipping agents are carried out whipability and foam stability mensuration, air-flow method foam survey meter passes into nitrogen with the 30mL/min flow velocity under 45 ℃ of constant temperatures, inject 5min.The lather volume that produces when gas injection finishes is as the lathering property of whipping agent, i.e. foaming volume (V).Lather volume decays to the used time of a half as the froth stability evaluation index, i.e. half foam life period (t).Foam aggregative index (FCI) can be considered foaming volume and two indexs of half foam life period simultaneously, and its calculation relational expression is FCI=3Vt/4.
The foaming properties of different whipping agents is as shown in table 1.As shown in Table 1, the foaming volume of different whipping agents all is higher than 160mL, half foam life period is all above 60min, its foam aggregative index all is higher than 8000mLmin, show that different whipping agents all have extraordinary foaming properties, can satisfy the different demands of oil field foam profile control, the displacement of reservoir oil, drilling well and water pumping gas production.
The foaming properties of table 1 whipping agent
Embodiment 2:
The foam profile control of whipping agent and oil displacement efficiency experimental technique are as follows: (a) choose artificial three layers of heterogeneous body core of 4.5cm * 4.5cm * 30cm, the variation coefficient is 0.72, and rate of permeation is 1100 * 10
-3μ m
2About, porosity is 22～25 %.Be evacuated to-1.0MPa two hours, then saturation water is measured the core volume of voids.Saturated Daqing oil field simulated oil (viscosity 9.5cp) is determined oil saturation, and is aging more than 12 hours.(b) water displacing oil is to moisture 98%, and record injection pressure, oil offtake and water production rate are calculated waterflood recovery efficiency factor.(d) during foam flooding, gas is selected nitrogen, and gas-liquid is injected simultaneously, and vapour-liquid ratio is 1:1, injects the foaming agent solution to be measured of 0.5 times of core volume of voids (PV).And then follow-up water displacing oil is to moisture 98%, and record injection pressure, oil offtake and water production rate are calculated the foam flooding recovery ratio.
The foam injection pressure curve of different whipping agents as shown in Figure 1 in the heterogeneous body core.As shown in Figure 1, the foam flooding stage injection pressure of different whipping agents is apparently higher than the injection pressure in water drive stage, and the pressure in follow-up water drive stage also is higher than the water drive stage.This foam that shows that whipping agent of the present invention produces has extraordinary profile control effect.Experiment numbers is that the foam injection pressure that the whipping agent system of 3# produces is higher than two other, and namely the effect of 3# whipping agent system profile control is best.
The foam flooding experimental result of different whipping agents is as shown in table 2 in the heterogeneous body core.As shown in Table 2, the foam flooding recovery ratio of different whipping agents all is higher than 36%, and experiment numbers is that the foam flooding recovery ratio of whipping agent system of 3# is near 40%.Analysis-by-synthesis shows that the foam that whipping agent of the present invention produces has extraordinary profile control, oil displacement efficiency.
Table 2 foam flooding experimental result
| Experiment numbers | Whipping agent forms and proportioning | Waterflood recovery efficiency factor (%) | Foam flooding recovery ratio (%) | Overall recovery factor (%) |
| 1# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.2wt%, dodecanamide propyl dimethyl betaine 0.18wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.1% | 34.6 | 36.8 | 71.4 |
| 2# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.2 wt%, dodecanamide propyl hydroxy sulfo lycine 0.15 wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.1% | 35.5 | 38.5 | 74.0 |
| 3# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.6 wt%, dodecanamide propyl hydroxy sulfo lycine 0.45wt%, the alkyl alcohol Soxylat A 25-7 (contains 2 ~ 3 polyoxyethylene groups, 12 ~ 15 alkyl carbon) 0.3 wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.2 wt%, calcium chloride 0.4wt% | 34.5 | 39.2 | 73.7 |
Embodiment 3:
The measurement of whipping agent drainability, under 90 ℃ of simulation gas well oil pipe conditions, the method for stirring with air-flow makes foaming agent solution produce foam, measures drainability within a certain period of time.The drainability of different whipping agents is shown in Table 3.As shown in Table 3, the liquid carry over of different whipping agents is numbered the used shortest time of whipping agent of 3# all near 150mL.This shows that different whipping agents all have preferably drainability, can satisfy the demand of gas well foam drainage gas recovery.
The drainability of table 3 whipping agent
| Experiment numbers | Whipping agent forms and proportioning | Liquid carry over (mL) | Take the liquid time (min) |
| 1# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.5wt%, dodecanamide propyl dimethyl betaine 0.35wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.02% | 145.6 | 13.4 |
| 2# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.5wt%, dodecanamide propyl hydroxy sulfo lycine 0.3wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.02%, sodium-chlor 0.6% | 146.9 | 12.3 |
| 3# | Alpha-olefin sodium sulfonate (containing 14 ~ 16 carbon) 0.6 wt%, dodecanamide propyl hydroxy sulfo lycine 0.45wt%, the alkyl alcohol Soxylat A 25-7 (contains 2 ~ 3 polyoxyethylene groups, 12 ~ 15 alkyl carbon) 0.3 wt%, partially hydrolyzed polyacrylamide (molecular weight 1,600 ten thousand) 0.04 wt%, calcium chloride 0.4wt% | 149.4 | 9.5 |
Claims (2)
1. whipping agent that is applicable to oil-field development, consist of by mass percentage: aniorfic surfactant content 0.2～1.0wt%, amphoteric ionic surfactant content 0.15～1.0wt%, nonionic surface active agent content 0～1.0wt%, suds-stabilizing agent content 0.01～1.0wt%, inorganic salt content 0～0.8wt%, surplus is water; Described aniorfic surfactant can be alkylbenzene sulfonate, sulfonated α-olefin, sulfonated petro-leum; Described amphoteric ionic surfactant can be sultaine, amino acid pattern; Described nonionic surface active agent can be alkyl alcohol Soxylat A 25-7, alkylol amide Soxylat A 25-7, alkyl polyglycoside, amine oxide type; Described suds-stabilizing agent can be partially hydrolyzed polyacrylamide, high fatty alcohol, stearic acid ammonium salt; Described inorganic salt are one or more the mixing in sodium-chlor, sodium sulfate, sodium bicarbonate, yellow soda ash, Repone K, calcium chloride, the magnesium chloride, also can be the inorganic salt that contain in the oilfield sewage.
2. the whipping agent that is applicable to oil-field development according to claim 1, it is characterized in that: alpha-olefin sodium sulfonate 0.6wt%, dodecanamide propyl hydroxy sulfo lycine 0.45wt%, alkyl alcohol Soxylat A 25-7 0.3wt%, partially hydrolyzed polyacrylamide 0.2wt%, calcium chloride 0.4wt%, water surplus.
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| CN 201110327276 CN102504788B (en) | 2011-10-25 | 2011-10-25 | Foaming agent suitable for oilfield development |
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