CN102690642B - Ternary composite oil displacement composition suitable for high-temperature high-salt oil reservoir and application thereof - Google Patents
Ternary composite oil displacement composition suitable for high-temperature high-salt oil reservoir and application thereof Download PDFInfo
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Abstract
The invention relates to a ternary composite oil displacement composition suitable for a high-temperature high-salinity oil reservoir and application thereof. The composition for ternary complex flooding comprises the following components in percentage by weight: 0.05-0.3% of composite surfactant, 0.1-0.25% of polymer, 0.05-2.00% of alkaline substance and the balance of water; wherein the composite surfactant is composed of two hydroxysulfobetaines with different structures, and the mass ratio of the two hydroxysulfobetaines is 9: 1-4: 6. The invention also provides application of the ternary complex composition for flooding in tertiary oil recovery. The ternary oil displacement composition of the composite surfactant has high oil displacement efficiency and low price of the oleamide hydroxysulfobetaine, and can reduce the oil displacement cost.
Description
Technical field
The present invention relates to chemical combination complex oil displacing composition used in a kind of tertiary oil recovery, particularly relate to a kind of ternary composite oil-displacing with composition and the application in tertiary oil recovery thereof, belong to technical field of petroleum extraction.
Background technology
China main force oil field is mainly take nonmarine deposit as main, and test in place proof chemical flooding is one of nonmarine deposit agent for improving oilfield recovery dominant technology.Daqing oil field polymer flooding year incremental oil production has reached 1,000 ten thousand tons, and the amplitude that improves recovery ratio by polymer controls mobility raising swept volume reaches more than 10%.Ternary composite oil-displacing improves the recovery ratio amplitude higher than polymer flooding by the synergy of controlling mobility and reduction interfacial tension, the multinomial field test that Daqing oil field is carried out shows that strong base ternary composite driving oil improves recovery ratio more than 20%, and Weak Base ASP Flood oil improves recovery ratio more than 18%.Therefore, the complex oil displacing technology is the Main Means that China main force oil field increases workable reserve, is one of dominant technology of CNPC's stable crude output.
Strong base ternary composite driving oil, due to the effect of alkali, makes the oil well fouling serious, and pump detection period shortens, and the technical difficulty of oil recovery and fringe cost increase; The alkali of high density has considerable influence to the three-component compound system viscosity,, in order to reach the mobility control ability of design, needs to increase the concentration of polymkeric substance in formula system, thereby has increased the cost of oil-displacing agent; The emulsification of complex oil displacing production fluid is serious, the processed difficulty is large.Therefore, complex oil displacing an important development trend is weak base.
Most widely used anionic and nonionic surface active agent in tertiary oil recovery, due to salt tolerance and temperature tolerance poor, can not be applicable to high temperature and high salt oil deposit.At present, the displacement of reservoir oil is mainly concentrated on negatively charged ion one nonionogenic tenside and two aspects of Anionic Gemini Surfactant with the research of temperature resistant antisalt tensio-active agent both at home and abroad.Yet cloudy non-type tensio-active agent and Anionic Gemini Surfactant synthesis technique are comparatively complicated, and cost is higher.Therefore, the temperature resistant antisalt tensio-active agent of development Cheap highly effective is very necessary.
Have simultaneously positively charged ion, anionicsite in the zwitterionics molecule, can form inner salt, insensitive to ionogen, good stability in hard water, lime soap dispersing power are arranged, and micelle-forming concentration is low, thereby for the oil reservoir of high salinity, high-temperature, amphoterics is important, as to have a potentiality research direction.Strong basicity N atom is arranged in the betaine type amphoteric surfactant molecule, its amphoteric character does not rely on the pH value, iso-electric point zone solubleness is unchanged, and beet alkali surface activator output in amphoterics is maximum, technique is the most ripe, more promising in tertiary oil recovery, but it is relatively less to have a correlative study report of beet alkali surface activator of temperature resistant antisalt performance.
patent of invention " a kind of phosphinylidyne-containing amine group hydroxy sulfo lycine and preparation and application " (application number 2010101304082) discloses a kind of novel beet bases zwitterionics, the binary that the erucicamide hydroxy sulfo lycine forms is wherein disclosed, ternary system all can reach ultra low interfacial tension, but the synthetic employing erucic acid of this trimethyl-glycine is raw material, its cost is very high, and the binary of making as tensio-active agent with the erucicamide hydroxy sulfo lycine merely, its interfacial tension of ternary system was gone up to some extent after 1 hour, can not reach ultra low interfacial tension after 105 minutes.Therefore, adopt cheap amine hydroxybenzene hydroxy sulfo lycine to substitute the higher erucicamide hydroxy sulfo lycine of price, and the amine hydroxybenzene hydroxy sulfo lycine is carried out composition research, improve its interface performance.
Summary of the invention
For solving the problems of the technologies described above, the purpose of this invention is to provide a kind of ternary composite oil-displacing composition that is applicable to high temperature and high salt oil deposit, with the composite formation complexed surfactant of different hydroxy sulfo lycines, when reaching ultra low interfacial tension, reduce costs, overcome the defect that long-time rear interface tension force gos up.
For achieving the above object, at first the present invention provides a kind of ternary composite oil-displacing composition that is applicable to high temperature and high salt oil deposit, and in the gross weight of this ternary composite oil-displacing with composition, it consists of the following composition:
Complexed surfactant, 0.05%-0.3%, polymkeric substance, 0.1%-0.25%, alkaline matter, 0.05%-2.00%, all the other are water; Wherein, complexed surfactant is comprised of the hydroxy sulfo lycine with the structure shown in formula 1 and the hydroxy sulfo lycine with the structure shown in formula 2, and mass ratio both is 9: 1-4: 6;
In formula 1, n is 17-21, and R is methyl or ethyl;
In formula 2, R
1For C
12-C
18Any one alkyl, R
2For methyl or ethyl.
According to the specific embodiment of the invention scheme, preferably, the above-mentioned binary alkali-free compound flooding oil that is applicable to high temperature and high salt oil deposit is used composition, and wherein, the hydroxy sulfo lycine with the structure shown in formula 1 is amine hydroxybenzene base hydroxy sulfo lycine, and structural formula is:
Hydroxy sulfo lycine with the structure shown in formula 2 is carbon octadecyl dimethyl hydroxy sulfo lycine, and structural formula is:
According to the specific embodiment of the invention scheme, preferably, above-mentioned ternary composite oil-displacing is total mineralization 〉=20000mg/L, the Ca of temperature 〉=75 ℃, water with the high temperature and high salt oil deposit that composition was suitable for
2+And Mg
2+The oil reservoir of content 〉=1000mg/L.Above-mentioned high temperature and high salt oil deposit can be that temperature is that 75 ℃-95 ℃, the total mineralization of water are 20000-100000mg/L, Ca
2+And Mg
2+Content is the oil reservoir of 1000-10000mg/L.
In the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention is used composition, preferably, the weight percent of complexed surfactant is 0.1%-0.3%, the weight percent of polymkeric substance is 0.1%-0.2%, the total amount per-cent of alkaline matter is 0.1%-1.00%, and the mass ratio of amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine is 8: 2-6: 4.
In the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention is used composition, preferably, the polymkeric substance that adopts is water-soluble polyacrylamide polymkeric substance and/or star temperature resistant antisalt polymkeric substance, water-soluble polyacrylamide polymkeric substance hydrolysis degree scope is 20%-30%, and star temperature resistant antisalt polymkeric substance hydrolysis degree scope is 1%-5%.More preferably, above-mentioned polymkeric substance is star temperature resistant antisalt polymkeric substance, for example the star temperature resistant antisalt polymkeric substance that provides of the embodiment 3 of No. 201010565501.6 Chinese invention patent applications.
With in composition, preferably, the molecular weight of the polymkeric substance that adopts is 3,000,000 to 3,500 ten thousand at the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention.
In the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention is used composition, preferably, the alkaline matter that adopts is one or several in sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, water glass, sodium tetraborate, sodium phosphate, Trimethylamine 99 and triethylamine etc.
With in composition, preferably, water is that sewage, local water or clear water etc. are injected in oil field at the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention.The salinity of water of the present invention is preferably less than 200000mg/L.
In the ternary composite oil-displacing that is applicable to high temperature and high salt oil deposit provided by the invention is used composition, preferably, the weight percent of complexed surfactant is 0.2%, the weight percent of polymkeric substance is 0.2%, the weight percent of alkaline matter is 0.2%, the mass ratio of amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine is 7: 3, and polymkeric substance is star temperature resistant antisalt polymkeric substance, and alkaline matter is sodium carbonate or sodium tetraborate etc.
Above-mentioned ternary composite oil-displacing provided by the invention can prepare according to following steps with composition:
Take the polymer dry powder of certain mass, the water configuration obtains polymer mother liquor, and slaking is after 24 hours; Complexed surfactant, alkaline matter and polymer mother liquor mixed preparing are obtained the ternary composite oil-displacing composition.
The present invention also provides the above-mentioned ternary composite oil-displacing application of composition in tertiary oil recovery that is applicable to high temperature and high salt oil deposit., by adopting this ternary composite oil-displacing composition, can obtain higher oil displacement efficiency.
According to the specific embodiment of the invention scheme, preferably, above-mentioned composition is be used to the oil reservoir that meets the following conditions: total mineralization 〉=20000mg/L, the Ca of temperature 〉=75 ℃, water
2+And Mg
2+The oil reservoir of content 〉=1000mg/L.Above-mentioned high temperature and high salt oil deposit can be that temperature is that 75 ℃-95 ℃, the total mineralization of water are 20000-100000mg/L, Ca
2+And Mg
2+Content is the oil reservoir of 1000-10000mg/L.
The ternary composite driving composition that is applicable to high temperature and high salt oil deposit provided by the invention adopts the complexed surfactant of the different composite formation of hydroxy sulfo lycine, its interface performance has surpassed simple with the performance of erucicamide hydroxy sulfo lycine as tensio-active agent, reached ultra low interfacial tension, ultralow state can be maintained in long-time rear its interfacial tension simultaneously, cost for oil production can also be reduced.Not only interface performance is good for the ternary composite driving composition that is applicable to high temperature and high salt oil deposit provided by the invention, and emulsifying property is also very good.
The rock core oil displacement experiment shows, the oil displacement efficiency of the ternary displacement of reservoir oil composition of the complexed surfactant that employing amine hydroxybenzene base hydroxy sulfo lycine provided by the invention and carbon octadecyl dimethyl hydroxy sulfo lycine are composite is high, and amine hydroxybenzene hydroxy sulfo lycine price is low, can reduce displacement of reservoir oil cost.
Description of drawings
Fig. 1 is the interfacial tension test result figure in embodiment 1.
Embodiment
Understand for technical characterictic of the present invention, purpose and beneficial effect being had more clearly, existing technical scheme of the present invention is carried out following detailed description, but but can not be interpreted as restriction to practical range of the present invention.
Embodiment 1 interface performance test
the present embodiment is to adopting carbon octadecyl dimethyl hydroxy sulfo lycine, amine hydroxybenzene base hydroxy sulfo lycine, erucicamide base hydroxy sulfo lycine has carried out interface performance research with the ternary composite oil-displacing of the complexed surfactant of composition and employing amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine composition with composition as the displacement of reservoir oil of tensio-active agent, wherein, above-mentioned amine hydroxybenzene base hydroxy sulfo lycine, the structure of erucicamide base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine is (hydroxy sulfo lycine of following examples is identical with hydroxy sulfo lycine herein) as follows respectively:
Amine hydroxybenzene base hydroxy sulfo lycine:
Erucicamide base hydroxy sulfo lycine:
Carbon octadecyl dimethyl hydroxy sulfo lycine:
Test method: the local water that adopts salinity 84000mg/L, preparation carbon octadecyl dimethyl hydroxy sulfo lycine, polymkeric substance and concentration of sodium carbonate are respectively the solution of 0.2wt%, obtain adopting the displacement of reservoir oil composition of carbon octadecyl dimethyl hydroxy sulfo lycine as tensio-active agent, wherein, polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides).
Adopt the local water of salinity 84000mg/L, preparation amine hydroxybenzene base hydroxy sulfo lycine, polymkeric substance and concentration of sodium carbonate are respectively the solution of 0.2wt%, obtain adopting the displacement of reservoir oil composition of amine hydroxybenzene base hydroxy sulfo lycine as tensio-active agent, wherein, polymkeric substance adopts star temperature resistant antisalt polymkeric substance.
Local water preparation erucicamide base hydroxy sulfo lycine, polymkeric substance and the concentration of sodium carbonate of employing salinity 84000mg/L is the solution of 0.2wt%, obtain adopting the displacement of reservoir oil composition of erucicamide base hydroxy sulfo lycine as tensio-active agent, wherein, polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides);
Carbon octadecyl dimethyl hydroxy sulfo lycine=8: 2), local water and the polymer formulation of salinity 84000mg/L obtain the solution that complexed surfactant concentration is 0.2wt% adopt complexed surfactant (amine hydroxybenzene base hydroxy sulfo lycine:, obtain adopting the ternary composite oil-displacing composition of complexed surfactant, wherein, polymkeric substance adopts star temperature resistant antisalt polymkeric substance, and concentration is 0.2wt%; Alkaline matter adopts sodium carbonate, and concentration is 0.2wt%.
Utilize the TX500C interface tension test instrument to adopt rotation to drip the interfacial tension of the above-mentioned two kinds of displacement of reservoir oils of method test with composition, probe temperature is 80 ℃, and rotating speed is 5000RPM, and result as shown in Figure 1.Wherein, the displacement of reservoir oil composition of carbon octadecyl dimethyl hydroxy sulfo lycine as tensio-active agent adopted in the curve A representative, the displacement of reservoir oil composition of amine hydroxybenzene base hydroxy sulfo lycine as tensio-active agent adopted in the curve B representative, the displacement of reservoir oil composition of erucicamide base hydroxy sulfo lycine as tensio-active agent adopted in the curve C representative, and curve D representative employing amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine are as the binary alkali-free compound flooding oil composition of complexed surfactant.
as seen from Figure 1, adopt separately carbon octadecyl dimethyl hydroxy sulfo lycine can not reach ultra low interfacial tension within 120 minutes, adopt separately amine hydroxybenzene base hydroxy sulfo lycine to go up to some extent with composition interfacial tension after 45 minutes as the displacement of reservoir oil of tensio-active agent, after 60 minutes, interfacial tension can not reach ultralow, adopt the displacement of reservoir oil of erucicamide base hydroxy sulfo lycine to go up to some extent with composition interfacial tension after 90 minutes, after 105 minutes, interfacial tension can not reach ultralow, and the ternary composite oil-displacing that adopts complexed surfactant composition not resilience of interfacial tension within 120 minutes, keep ultralow always, and its interfacial tension is lower, therefore, adopt the ternary composite oil-displacing of the composite complexed surfactant of amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine can overcome the problem of independent employing amine hydroxybenzene base hydroxy sulfo lycine or the long-time rear interface tension force rise of erucicamide base hydroxy sulfo lycine with composition, also can solve the problem that independent employing carbon tetradecyl dimethyl hydroxy sulfo lycine can't reach ultralow interfacial tension, interface performance is better.
Embodiment 2 complexed surfactant ratio optimizations
The present embodiment has carried out interface performance research to the complexed surfactant that is comprised of amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine.Above-mentioned complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and the carbon octadecyl dimethyl hydroxy sulfo lycine of different mass ratio.
Testing method: adopting local water, polymkeric substance, alkaline matter and the complexed surfactant preparation complexed surfactant concentration of salinity 84000mg/L is the solution of 0.2wt%, the polymkeric substance that adds adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides), and concentration is 0.2wt%; Alkaline matter adopts sodium carbonate, and concentration is 0.2wt%.Utilize the TX500C interface tension test instrument to adopt rotation to drip the interfacial tension of the above-mentioned solution of method test, probe temperature is 80 ℃, and rotating speed is 5000RPM, and test result is as shown in table 1.
Table 1 interfacial tension test result
| Amine hydroxybenzene base hydroxy sulfo lycine: carbon octadecyl dimethyl hydroxy sulfo lycine | Interfacial tension, mN/m |
| 9∶1 | 8.34×10 -3 |
| 8∶2 | 6.91×10 -3 |
| 7∶3 | 4.57×10 -3 |
| 6∶4 | 5.79×10 -3 |
| 5∶5 | 7.86×10 -3 |
| 4∶6 | 9.05×10 -3 |
As can be seen from Table 1, within the proportional range of listing, adopt the solution of complexed surfactant all can reach ultra low interfacial tension; And when amine hydroxybenzene base hydroxy sulfo lycine: during carbon octadecyl dimethyl hydroxy sulfo lycine=7: 3, the interfacial tension value is minimum is 4.57 * 10
-3MN/m.Therefore, optimize best proportioning, amine hydroxybenzene base hydroxy sulfo lycine: the mass ratio of carbon octadecyl dimethyl hydroxy sulfo lycine is 7: 3.
The present embodiment is tested with the impact of the viscosity of composition ternary composite oil-displacing polymkeric substance.
Testing method: adopt (ASP) ternary system solution of local water preparation alkaline matter/polymkeric substance/complexed surfactant of salinity 84000mg/L, i.e. ternary composite oil-displacing composition, wherein, and alkaline matter employing sodium carbonate, concentration is 0.2wt%; Complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine, and both mass ratio is 7: 3, and the concentration of complexed surfactant is 0.2wt%; Adopt three kinds of polymkeric substance to carry out respectively the preparation of solution, its physical and chemical index is as shown in table 2, and concentration is 0.2%.Viscosity test adopts U.S. Brookfield LVDVII rotational viscosimeter to carry out, and 0# rotor, rotating speed are 6RPM, and probe temperature is 95 ℃, and experimental result is as shown in table 3, and viscosity unit is mPas.
As can be seen from Table 3, three kinds of polymkeric substance contrasts, the viscosity of the solution of employing star temperature resistant antisalt polymkeric substance is the highest, and this correlated performance that this star temperature resistant antisalt polymkeric substance is described is better.
Table 2 polymkeric substance physical and chemical index
Table 3 viscosity test result
| Ternary system solution | |
| Polymkeric substance 1 | 8.6 |
| Polymkeric substance 2 | 7.8 |
| |
6.8 |
The present embodiment is tested with the interface performance of composition ternary composite oil-displacing alkaline matter.
Testing method: the ternary system solution that adopts local water configuration alkaline matter/polymkeric substance/complexed surfactant of salinity 84000mg/L, it is the ternary composite oil-displacing composition, wherein, alkaline matter adopts sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, water glass, sodium tetraborate, sodium phosphate, and concentration is 0.2wt%; Complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine, and mass ratio both is 7: 3, and the concentration of complexed surfactant is 0.2wt%; Polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides), and concentration is 0.2wt%.Utilize the TX500C interface tension test instrument to adopt rotation to drip the interfacial tension of the above-mentioned solution of method test, probe temperature is 80 ℃, and rotating speed is 5000RPM, and experimental result is as shown in table 4.
As can be seen from Table 4, adopting different alkaline matters: when sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, water glass, sodium tetraborate, sodium phosphate, the ternary system solution of alkaline matter/polymkeric substance/complexed surfactant all can reach ultra low interfacial tension.There are the problems such as formation damage and pipeline corrosion due to the strong base ternary chemical displacement of reservoir oil, therefore, alkaline matter of the present invention preferably adopts weak base sodium carbonate, water glass, sodium tetraborate, sodium phosphate etc., wherein, the interfacial tension value of the solution of employing sodium carbonate and sodium tetraborate is lower, and performance is relatively better.
Table 4 interfacial tension test result
| Alkaline matter | Interfacial tension, mN/m |
| Sodium hydroxide | 6.03×10 -3 |
| Potassium hydroxide | 3.94×10 -3 |
| Sodium bicarbonate | 5.81×10 -3 |
| Sodium carbonate | 2.73×10 -3 |
| Water glass | 8.22×10 -3 |
| Sodium tetraborate | 2.57×10 -3 |
| Sodium phosphate | 7.24×10 -3 |
Embodiment 5 emulsifying property tests
The present embodiment is tested with the emulsifying property of composition the ternary composite oil-displacing that adopts complexed surfactant.
Testing method: local water preparation alkaline matter/polymkeric substance/complexed surfactant (ASP) ternary system solution that adopts salinity 84000mg/L, it is the ternary composite oil-displacing composition, wherein, alkaline matter adopts sodium carbonate, water glass, sodium tetraborate, sodium phosphate, and concentration is 0.2wt%; Complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine, and mass ratio both is 7: 3, and the concentration of complexed surfactant is 0.2wt%; Polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides), and concentration is 0.2wt%;
(under 95 ℃, 21.4MPa condition, viscosity of crude was 0.85mPa.s with crude oil according to the water oil ratio of 1: 1; Saturated hydrocarbon content is 52%, and aromaticity content is 43%) and prepare the solution that obtains and mix, pour air-tight bottle into;
Adopt the reciprocating type isothermal vibration device of HZ-8812S water-bath, with the speed of 90rpm, shook 6 hours, observe system layering situation after standing 72 hours, probe temperature is 80 ℃, experimental result is as shown in table 5.
Table 5 emulsifying property test result
| Alkaline matter | Sodium carbonate | Water glass | Sodium tetraborate | Sodium phosphate |
| Middle phase micro-emulsified liquid amasss content, % | 23 | 15 | 19 | 11 |
As can be seen from Table 5, for the ternary system solution of lower concentration, while adopting different types of weak base, all there is middle phase micro-emulsified liquid in system, has the good emulsifying performance.The middle phase micro-emulsified liquid proportion of the ASP ternary system solution of employing sodium carbonate is the highest by 23%, adopt the ASP ternary system solution of sodium tetraborate to take second place, adopt the ASP ternary system solution middle phase micro-emulsified liquid proportion minimum 11% of sodium phosphate, this moment profit System forming bicontinuous microemulsion liquid, the microemulsion type is the WinsorIII type.Middle phase micro-emulsified liquid has not only the peculiar property of can solubilisation oils but also can Solubilization of Water, and and oil phase and water between interfacial tension reach extremely low.Middle phase micro-emulsified liquid proportion is higher, shows that emulsifying capacity is stronger, and therefore, the emulsifying capacity of the ASP ternary system solution of employing sodium carbonate is the strongest, adopts the ASP ternary system solution of sodium tetraborate to take second place, and adopts the ASP ternary system solution of sodium phosphate the poorest.
Interface performance test under the different alkaline material concentration conditions of embodiment 6
The present embodiment is tested with the interface performance of composition the ternary composite oil-displacing under the alkaline material concentration condition of difference.
Testing method: adopt local water preparation alkaline matter/polymkeric substance/complexed surfactant (ASP) ternary system solution of salinity 84000mg/L, i.e. the ternary composite oil-displacing composition; Wherein, alkaline matter adopts sodium carbonate, and concentration is 0.2wt%-2.0wt%; Complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine, and mass ratio both is 7: 3, and the concentration of complexed surfactant is 0.1wt%-0.3wt%; Polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 Chinese invention patent applications provides), and concentration is 0.2wt%; Utilize the TX500C interface tension test instrument to adopt rotation to drip the interfacial tension of the above-mentioned solution of method test, probe temperature is 80 ℃, and rotating speed is 5000RPM, and experimental result is as shown in table 6.
Table 6 interfacial tension test result
As can be seen from Table 6, concentration of sodium carbonate is in the 0.2wt%-1.5wt% scope, and ternary composite oil-displacing all can reach ultra low interfacial tension with composition, has interfacial activity preferably.
Embodiment 7 oil displacement efficiency tests
The present embodiment adopts the rock core oil displacement experiment to test with the oil displacement efficiency of composition ternary composite oil-displacing.
The rock core oil displacement experiment carries out according to petroleum industry standard SY/T 6424-2000 composite oil-displacing system performance test methods.Base program is: rock core is found time, and saturated local water-survey water phase permeability-saturated crude oil is made irreducible water-water drive to moisture 98%-injection chemical flooding slug (being displacement of reservoir oil composition)-follow-up local water that turns and is driven to moisture 98%.
experimental temperature is 90 ℃, use in composition in the displacement of reservoir oil, the water that adopts is the local water of salinity 84000mg/L, surfactant 1 is carbon octadecyl dimethyl hydroxy sulfo lycine, surfactant 2 is amine hydroxybenzene base hydroxy sulfo lycine, surfactant 3 is erucicamide base hydroxy sulfo lycine, complexed surfactant is amine hydroxybenzene base hydroxy sulfo lycine and carbon octadecyl dimethyl hydroxy sulfo lycine (mass ratio both is 7: 3), polymkeric substance adopts star temperature resistant antisalt polymkeric substance (the star temperature resistant antisalt polymkeric substance that the embodiment 3 of No. 201010565501.6 applications for a patent for invention provides).Experimental result is as shown in table 7.
Table 7 oil displacement efficiency evaluation result
as can be seen from Table 7, adopting simple single polymers system further to improve recovery ratio after carrying out water drive is only 14.43%, the ASP ternary composite oil-displacing of employing carbon octadecyl dimethyl hydroxy sulfo lycine improves recovery ratio after water drive with composition be 17.35%, the ASP ternary composite oil-displacing of employing amine hydroxybenzene base hydroxy sulfo lycine improves recovery ratio after water drive with composition be 18.17%, the ASP ternary composite oil-displacing of employing erucicamide base hydroxy sulfo lycine improves recovery ratio after water drive with composition be 19.64%, and the employing complexed surfactant, the ASP ternary composite oil-displacing of sodium carbonate improves recovery ratio after water drive with composition can reach 26.16%.Therefore, the oil displacement efficiency of ternary composite driving oil compositions is higher than monobasic system; For ASP ternary composite oil-displacing composition, adopt complexed surfactant to improve the better effects if of recovery ratio than simple carbon octadecyl dimethyl hydroxy sulfo lycine, amine hydroxybenzene base hydroxy sulfo lycine, erucicamide base hydroxy sulfo lycine, the ternary composite oil-displacing of employing complexed surfactant carries out displacement of reservoir oil operation with composition and has more advantage.
Claims (9)
1. be applicable to the ternary composite oil-displacing composition of high temperature and high salt oil deposit, in the gross weight of this ternary composite oil-displacing with composition, it consists of the following composition: complexed surfactant, 0.05%-0.3%, polymkeric substance, 0.1%-0.25%, alkaline matter, 0.05%-2.00%, all the other are water; Wherein, described complexed surfactant is comprised of the hydroxy sulfo lycine with the structure shown in formula 1 and the hydroxy sulfo lycine with the structure shown in formula 2, and mass ratio both is 9:1-4:6;
In formula 1, n is 17-21, and R is methyl or ethyl;
In formula 2, R
1For C
12-C
18Any one alkyl, R
2For methyl or ethyl;
Wherein, described polymkeric substance is water-soluble polyacrylamide polymkeric substance and/or star temperature resistant antisalt polymkeric substance, and the degree of hydrolysis of described water-soluble polyacrylamide polymkeric substance is 20%-30%, and the degree of hydrolysis of described star temperature resistant antisalt polymkeric substance is 1%-5%;
Described alkaline matter is one or several in sodium hydroxide, potassium hydroxide, sodium bicarbonate, sodium carbonate, water glass, sodium tetraborate, sodium phosphate, Trimethylamine 99 and triethylamine.
2. the ternary composite oil-displacing composition that is applicable to high temperature and high salt oil deposit according to claim 1, wherein, described hydroxy sulfo lycine with the structure shown in formula 1 is amine hydroxybenzene base hydroxy sulfo lycine, structural formula is:
Described hydroxy sulfo lycine with the structure shown in formula 2 is carbon octadecyl dimethyl hydroxy sulfo lycine, and structural formula is:
3. the ternary composite oil-displacing composition that is applicable to high temperature and high salt oil deposit according to claim 2, wherein, the weight percent of described complexed surfactant is 0.1%-0.3%, the weight percent of described polymkeric substance is 0.1%-0.2%, the total amount per-cent of described alkaline matter is 0.1%-1.00%, and the mass ratio of described amine hydroxybenzene base hydroxy sulfo lycine and described carbon octadecyl dimethyl hydroxy sulfo lycine is 8:2-6:4.
4. according to claim 1 or 3 described ternary composite oil-displacing compositions that are applicable to high temperature and high salt oil deposit, wherein, the molecular weight of described polymkeric substance is 3,000,000 to 35,000,000.
5. the ternary composite oil-displacing composition that is applicable to high temperature and high salt oil deposit according to claim 1, wherein, described water is that sewage, local water or clear water are injected in oil field, the salinity of described water is less than 200000mg/L.
6. according to claim 1 or 3 described ternary composite oil-displacing compositions that are applicable to high temperature and high salt oil deposit, wherein, the weight percent of described complexed surfactant is 0.2%, the weight percent of described polymkeric substance is 0.2%, the weight percent of described alkaline matter is 0.2%, the mass ratio of described amine hydroxybenzene base hydroxy sulfo lycine and described carbon octadecyl dimethyl hydroxy sulfo lycine is 7:3, described polymkeric substance is star temperature resistant antisalt polymkeric substance, and described alkaline matter is sodium carbonate or sodium tetraborate.
7. the described ternary composite oil-displacing application of composition in tertiary oil recovery that is applicable to high temperature and high salt oil deposit of claim 1-6 any one.
8. application according to claim 7, wherein, described composition is be used to the oil reservoir that meets the following conditions: temperature 〉=75 ℃, the total mineralization 〉=20000mg/L of water, Ca
2+And Mg
2+The oil reservoir of content 〉=1000mg/L.
9. according to claim 7 or 8 described application, wherein, described high temperature and high salt oil deposit is that temperature is the oil reservoir of 75 ℃-95 ℃.
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| CN104399405B (en) * | 2014-12-05 | 2016-06-08 | 中国石油天然气股份有限公司 | Aryl alkyl polyoxyethylene ether sulfobetaine surfactant, preparation method and application thereof |
| US10047279B2 (en) * | 2016-05-12 | 2018-08-14 | Saudi Arabian Oil Company | High temperature viscoelastic surfactant (VES) fluids comprising polymeric viscosity modifiers |
| CN107916098A (en) * | 2016-10-08 | 2018-04-17 | 中国石油化工股份有限公司 | Displacement of reservoir oil Surfactant Used in Viscoelastic Fracturing Fluids composition and its preparation method and application |
| CN106566513B (en) * | 2016-10-31 | 2019-07-09 | 中国石油天然气股份有限公司 | Alkali-free binary composite flooding composition and application thereof in chemical flooding |
| CN106566509B (en) * | 2016-10-31 | 2019-07-09 | 中国石油天然气股份有限公司 | Ternary combination flooding composition and application thereof in high-temperature high-salinity oil reservoir |
| CN106566514B (en) * | 2016-10-31 | 2019-07-09 | 中国石油天然气股份有限公司 | Alkali-free binary composite flooding composition and application thereof in high-temperature high-salinity oil reservoir |
| CN106987242A (en) * | 2017-05-02 | 2017-07-28 | 东营黄蓝知识产权运营管理有限公司 | A kind of resistance to high Mg2+The compound petroleum driving and recovering agent of salt and oil flooding method |
| CN110317597A (en) * | 2018-03-29 | 2019-10-11 | 中国石油化工股份有限公司 | A kind of lotion composite oil-displacing system and its preparation method and application |
| CN111322044A (en) * | 2019-12-10 | 2020-06-23 | 大庆油田有限责任公司 | Multi-pump multi-well three-agent separate injection process |
| CN112651123B (en) * | 2020-12-24 | 2022-11-25 | 大庆油田有限责任公司 | Ternary combination flooding injection scheme design method |
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