CN104449629B - A kind of emulsion mobility control agent and preparation method thereof - Google Patents
A kind of emulsion mobility control agent and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of emulsion mobility control agents and preparation method thereof, belong to oil field chemical technical field.A kind of emulsion mobility control agent, the composition being made of alkanolamide, betaine type amphoteric ionic surface active agent, cosurfactant and deionized water.Preparation method includes the following steps: for alkanolamide, betaine type amphoteric ionic surface active agent to be mixed and added in high temp glass reaction kettle, is warming up to 35 DEG C~45 DEG C, and stir evenly；Cosurfactant is added to continue to stir 30min, is then slowly added to deionized water by several times, stirs evenly to get a kind of emulsion mobility control agent is arrived.Emulsion mobility control agent provided by the invention, 110 DEG C of heatproof, salt tolerant 20 × 104Mg/l(wherein Ca2+4000mg/L、Mg2+1000mg/L), all there are good long-time stability in different reservoir temperatures, can be applied to high temperature and high salinity reservoir condition.
Description
Technical field
The present invention provides a kind of tertiary oil production in oil field mobility control agent and preparation method thereof, and in particular to a kind of emulsion
Mobility control agent and preparation method thereof belongs to oil field chemical technical field.
Background technique
For waterflooding oil field, when oil field enters high water cut viscous heavy crude oil, oil reservoir is by primary oil recovery and secondary adopts
It after oil, still has more than 60% crude oil and remains in the blowhole of oil reservoir, continue to improve recovery ratio difficulty using conventional water drive
Larger, the tertiary oil recovery technology based on the chemical floodings such as polymer flooding, surfactant and combination flooding has been carried out in each oil field in succession, takes
Obtained effect of preferably taping the latent power.But it is very limited for high temperature and high salt oil deposit polymerization species chemical flooding, with temperature-resistant anti-salt
Displacing surfactant system research and development success, chemical flooding have become the important raising recovery ratio method in each oil field in the world it
One.But there is channelling in the exclusive use of temperature-resistant anti-salt surfactant, have the defects that swept volume and oil displacement efficiency reduce,
It is more serious especially for heterogeneous reservoir channelling, it is therefore desirable to be found for surfactant drive and effectively control mobility, prevent from altering
Stream, the method for improving swept volume and oil displacement efficiency.Field application surfactant flooding fluidity control system mainly has two at present
Class:
The first kind is foam fluidity control system, periodical " University of Petroleum's journal " the 1st phase document " foam of volume 27 in 2003
Foam is described in combination flooding microcosmic oil drive specificity analysis " to the fluidity control mechanism of action of binary combination flooding, microcosmic oil drive is real
Test display foam in binary combination flooding mainly by squeeze occupy, Selective plugging macropore and emulsification seepage effect realize
Fluidity control and the effect for expanding swept volume.For such system since anti-channeling main body is foam, intensity is not high, and presence and table
Face active ingredient problem, reduces the activity of surfactant, air foam system the problems such as there is also seriously corrodeds；
Second class is the polymer mobility control system based on HPAM, and polymer can increase aqueous viscosity, improves oil
Water mobility ratio, efficiently solve the problems, such as single surfactant of infusing along the channelling of predominant pathway, but the polymer viscosity researched and developed at present
It is affected by temperature salinity, after polymer injects oil reservoir, thermal degradation and further water can occur under the conditions of high temperature and high salt
Solution, destroys the stability of polymer, substantially reduces the oil displacement efficiency of polymer.Periodical " Petroleum finance " 1998 the 25th
It rolls up in the 6th phase document " hydrolysis of polyacrylamide repercussion study under the conditions of high-temperature oil reservoir " through experimental verification temperature, salinity
Stronger hydrolysis occurs under the high temperature conditions for the influence to HPAM viscosity, studies have shown that HPAM, when degree of hydrolysis is more than certain value
Viscosity is on a declining curve afterwards, if water salinity is high, especially bivalent cation content is high, and viscosity is even more sharp fall, very
Precipitating can be extremely generated, HPAM is made to lose oil-displacement capacity.Research is thought for most of oil reservoirs, generally uses the HPAM displacement of reservoir oil most
High-temperature is 70-82 DEG C.
Summary of the invention
It is an object of the invention to overcome, temperature-resistant anti-salt degree is low, matches existing for existing surfactant fluidity control system
The defects of 5 property are poor, and then a kind of emulsion mobility control agent is provided.
It is a further object to provide the preparation methods of above-mentioned mobility control agent.
The technical solution adopted by the invention is as follows:
A kind of emulsion mobility control agent by alkanolamide, betaine type amphoteric ionic surface active agent, helps surface-active
The composition of agent and deionized water composition, contains following structural formula:
Formula 1
In formula 1, R1 C12-C18Alkyl；
Formula 2
In formula 2, R2For alkyl or alkylene, R3For methyl, ethyl, propyl or ethoxy；
Formula 3
In formula 3, R4For alkyl or alkylene, X is ethanesulfonic acid sodium, propanesulfonate or hydroxide sodium dimercaptosulphanatein.
A kind of preparation method of emulsion mobility control agent comprising the steps of:
Alkanolamide, betaine type amphoteric ionic surface active agent are mixed and added in high temp glass reaction kettle, risen
Temperature is stirred evenly to 35 DEG C~45 DEG C；Cosurfactant is added to continue to stir 20-40min, is then slowly added to by several times
Ionized water stirs evenly to get a kind of emulsion mobility control agent is arrived, wherein each component mass percent are as follows: alkanolamide
20wt%~30wt%, betaine type amphoteric ionic surface active agent 10wt%~20wt%, cosurfactant 10wt% are remaining
Amount is the deionized water.
The alkanolamide, preferably lauric acid diethyl amide, lauric acid amide of ethanol.
The betaine type amphoteric ionic surface active agent is fatty acid amide propyl glycine betaine and alkyl sulfobetaines beet
One or both of alkali is compound.
The fatty acid amide propyl glycine betaine, preferably Cocoamidopropyl betaine and lauric amide propyl sweet tea
One of dish alkali.
The alkyl sulfo betaines, preferably docosyl hydroxypropyl sulfobetaines, eicosyl hydroxypropyl sulfo group
One of glycine betaine and octadecyl hydroxypropyl sulfobetaines.
The cosurfactant is one of methanol, ethyl alcohol, isopropanol or n-butanol.
The beneficial effects of the present invention are: the present invention provides to obtain emulsion mobility control agent, 110 DEG C of heatproof, salt tolerant 20 ×
104Mg/l (wherein Ca2+4000mg/L、Mg2+1000mg/L), all there is good long-time stability, energy in different reservoir temperatures
Enough it is applied to high temperature and high salinity reservoir condition；In different oil-water ratio mixed proportion conditions, high concentration uses emulsus of the invention
Liquid mobility control agent energy emulsified crude oil forms the emulsion that viscosity is 2.8-12.8mPa.s, partial size is 1-500 μ m, is formed
Emulsion performance is stable, power of regeneration is strong；Low concentration can form 10 with crude oil using emulsion mobility control agent of the invention-4
~10-3The ultralow interfacial tension of mN/m；By using the change of concentration, so that it may realize the dual effect of fluidity control and washing oil
Fruit effectively solves the problems, such as channelling existing for single note surfactant, goes back while avoiding and match existing for conventional surfactants combination flooding
5 property problems；The emulsion mobility control agent uses high-concentration and low-concentration alternate injection method, can improve and adopt on the basis of water drive
Yield 18%~21.5%.
Detailed description of the invention
Attached drawing 1 is that embodiment 1 obtains oil displacement agent composition concentration, oil-water ratio and the relationship for forming emulsus fluid viscosity；
Attached drawing 2 is the reconstituted emulsion viscosimetric analysis that embodiment 1 obtains the formation of oil displacement agent composition；
Attached drawing 3 is that embodiment 1 obtains oil displacement agent composition reduction crude oil oil water interfacial tension ability；
Attached drawing 4 is that embodiment 1 obtains oil displacement agent composition high-temperature stability.
Specific embodiment
Below with reference to embodiment, the following further describes the technical solution of the present invention.
Embodiment 1:
By mass concentration be 30% lauric acid amide of ethanol, 10% Cocoamidopropyl betaine is mixed and added to height
In warm glass reaction kettle, 40 DEG C are warming up to, after mixing evenly with 200r/min revolving speed, 9% ethyl alcohol is added and continues to stir 30min,
Then 1% isopropanol is added, then is slowly added to balance deionized water by several times, stirs evenly to get a kind of active matter content is arrived
The emulsion mobility control agent of 40%, pH value 7-9, product are yellow homogeneous liquid.
The emulsion mobility control agent total salinity that embodiment 1 is obtained is 18 × 104The Pucheng oil field in Zhongyuan of mg/L
Scene injection water, total salinity are 20 × 104The live recovered water of mg/L is configured to 0.6wt%-3wt% strength solution as water
Phase, 2+3 crude oil is closed to be placed in 85 DEG C of constant temperature after mixing by 1:9,3:7 difference oil-water ratio as oily phase on the Chengxi District Pu sand two
Constant temperature 8 hours in case, using 85-2 type constant temperature blender with magnetic force, with 140r/min revolving speed stirring 5 minutes, crude oil emulsified shape completely
At uniform emulsion, with III cloth viscosimeter of DV- under the conditions of 85 DEG C, 60r/min, use 4# rotor measurement emulsus fluid viscosity for
2.8-10.5mPa.s result is as shown in Fig. 1.As shown in Figure 1, illustrate the emulsion mobility control agent thickening effect of high concentration
Fruit is obvious, has good fluidity control effect.
After above-mentioned emulsion stratification, mixed again, under jog 10 using above-mentioned identical side up and down by hand
Method measures emulsus fluid viscosity, as a result as shown in Fig. 2.As shown in Figure 2, manual jog can be newborn again after the quiet layering of emulsion
Change, viscosity, stability are more little than changing with first Emulsion Phase, illustrate that emulsion power of regeneration is stronger.
The 0.05%-0.5% emulsion fluidity control agent solution for taking injection water to prepare drips ultralow boundary using TX500C rotation
It is 10 that face tensiometer measures oil water interfacial tension under the conditions of 85 DEG C, 6000r/min-3-10-4MN/m, as shown in Fig. 3, explanation
The emulsion mobility control agent of low concentration can reach ultralow oil water interfacial tension, effectively improve oil displacement efficiency.It is dense by 0.05%
It spends displacement of reservoir oil agent solution and places 110 DEG C after baking oven high temperature ageing 90 days, be still able to maintain ultralow interfacial tension, as shown in Fig. 4, explanation
Present invention performance under the conditions of high temperature and high salt oil deposit is stablized, and can satisfy live needs.
The solution that water is prepared will be injected and carry out rock core displacement test on high temperature and pressure oil reservoir physical simulation experiment device.If
Setting experimental temperature is 85 DEG C, injects water saturation displacement artificial core with scene, carries out saturated oils to artificial core with Simulation of Crude Oil,
With 0.5ml/min speed water drive, 0.5PV fluidity control agent solution, subsequent waterflooding then are injected using different injection combinations
To residual oil state, recovery ratio 18%-21.5% can be improved on the basis of water drive using high-concentration and low-concentration alternate injection method,
The results are shown in Table 1.
1 rock core displacement test result of table
2~4 step of embodiment is same as Example 1, and the drug used of emulsion mobility control agent preparation matches such as 2 institute of table
Show.It is real according to " measurement of GB/T22235-2008 liquid viscosity ", " surface SY/T5370-1999 and interfacial tension measuring method "
Standard inspection standard carries out viscosity and interfacial tension performance evaluation, experiment condition and result as shown in table 3, table 4:
Drug used in 2 emulsion mobility control agent of table matches table
The viscosity of emulsion is formed under the conditions of the different oil-water ratios of table 3
4 various concentration mobility control agent of table reduces oil water interfacial tension ability
By table 3 and table 4 it is found that the obtained emulsion mobility control agent of the present invention is in different oil-water ratio mixed proportion conditions,
High concentration forms the emulsion that viscosity is 2.8-12.8mPa.s, partial size is 1-500 μ m using energy emulsified crude oil, formation
Emulsion performance is stable, power of regeneration is strong, and emulsus fluid viscosity is 2.2-10.3 times of viscosity of crude, can be used to control mobility；
Low concentration use can form 10 with crude oil-3-10-4The ultralow interfacial tension of mN/m improves displacement efficiency；110 DEG C of heatproof, salt resistance
20×104mg/L。
Claims (4)
1. a kind of emulsion mobility control agent, it is characterised in that: be by alkanolamide, betaine type amphoteric ion surface active
Agent, cosurfactant and deionized water composition composition, wherein each component mass percent are as follows: alkanolamide 20wt%~
30wt%, betaine type amphoteric ionic surface active agent 10wt%~20wt%, cosurfactant 10wt%, surplus is deionization
Water；The alkanolamide is lauric acid diethyl amide or lauric acid amide of ethanol；The betaine type amphoteric ion table
Face activating agent is one or both of fatty acid amide propyl glycine betaine and alkyl sulfo betaines；Described helps surface-active
Agent is one or both of methanol, ethyl alcohol, isopropanol or n-butanol.
2. a kind of preparation method of emulsion mobility control agent as described in claim 1, it is characterised in that: by alkanolamide,
Betaine type amphoteric ionic surface active agent is mixed and added in high temp glass reaction kettle, is warming up to 35 DEG C~45 DEG C, and stir
It mixes uniformly, cosurfactant is added and continues to stir 20-40min, is then slowly added to deionized water by several times, stirs evenly, i.e.,
Obtain a kind of emulsion mobility control agent.
3. the preparation method of emulsion mobility control agent according to claim 2, it is characterised in that: the fatty acid acyl
Amine propyl betaine is one of Cocoamidopropyl betaine and lauric amide propyl betaine.
4. the preparation method of emulsion mobility control agent according to claim 2, it is characterised in that: the alkyl sulfobetaines
Glycine betaine is docosyl hydroxypropyl sulfobetaines, eicosyl hydroxypropyl sulfobetaines and octadecyl hydroxypropyl sulfobetaines
One of alkali.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109666473A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | Surfactant binary built flooding method |
| CN109666474B (en) * | 2017-10-17 | 2021-10-01 | 中国石油化工股份有限公司 | Surfactant binary compound system with ultralow oil-water interfacial tension |
| CN111073620A (en) * | 2018-10-22 | 2020-04-28 | 中国石油化工股份有限公司 | Surfactant composition |
| CN109401745B (en) * | 2018-11-21 | 2021-03-12 | 西南石油大学 | Self-adaptive mobility control system and application thereof in high-temperature high-salinity oil reservoir |
| CN109810683A (en) * | 2019-03-26 | 2019-05-28 | 黑龙江信维源化工有限公司 | A kind of high temperature resistant transfer drive composition |
| CN110643338A (en) * | 2019-10-17 | 2020-01-03 | 大港油田集团有限责任公司 | Corrosion inhibitor with oil displacement effect |
| CN112251208B (en) * | 2020-10-26 | 2022-09-30 | 德仕能源科技集团股份有限公司 | Oil displacement surfactant for high-temperature high-salt oil reservoir and preparation method and application thereof |
| CN113356814B (en) * | 2021-07-14 | 2022-03-11 | 西南石油大学 | Method for improving recovery ratio of thickened oil by using high-phase-change oil-water in-situ emulsion |
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