Micellar solution for extruding crude oil from bed

专利摘要:
A micellar slug for use in the recovery of oil, the slug containing a hydrocarbon, an aqueous medium, a surfactant, and a cosurfactant. The surfactant contains as an essential component an internal olefin sulfonate or sulfonates having 10 to 26 carbon atoms and having the specified compositions. This micellar slug has an excellent capability for decreasing an interfacial tension between oil and micro-emulsions and between water and micro-emulsions and an excellent salinity tolerance at a wide salt concentration range. Furthermore, the micro-emulsion can be maintained stable during the sweeping in the subterranean reservoirs even when the salt concentration of the formation water is changed.
公开号:SU1378788A3
申请号:SU833540604
申请日:1983-01-27
公开日:1988-02-28
发明作者:Морита Хироси；Кавада Ясуюки；Ямада Юнити；Укигаи Тосиюки
申请人:Лион Корпорейшн (Фирма)；
IPC主号:

专利说明:

00

00
CX)
00
 cm
The invention relates to the oil production industry, in particular, to methods of extracting oil from formations by pumping a solution of micelles into the formation
The purpose of the invention is enhanced oil recovery.
In accordance with the invention, a micellar unit, intended for the recovery of oil and consisting of a hydrocarbon, an aqueous medium, a surface active agent and a surface active agent, is proposed, the surface active agent containing olefinic sulfonate as an essential component. with internal non-bonded bond containing from 10 to 30 carbon atoms
A method has also been developed for producing oil from oil-containing underground reservoirs into which boreholes have been introduced. The method includes the steps of injecting a borehole of a micellar unit, consisting essentially of a hydrocarbon, an aqueous medium, a surface-active agent, and a surface-active co-agent, through the borehole, and the surface-active agent contains an internal component (intramolecule) ry) olefinic sulfate containing from 10 to 30 carbon atoms and injecting at least one moving fluid into the underground reservoir, as well as removing oil 1g from the underground reservoir through bzfovye wells
It is desirable to use such micellar blocks for the extraction of oil, which are transparent microemulsions containing approximately weight,%; hydrocarbon 4-90j aqueous medium about 4-92J surface active agent about 3-30, containing in turn, as a necessary component, an internal olefinic sulfonate having 10-30 carbon atoms, and a surface-coagent of about 0.1- 20,
The aqueous medium that can be used to prepare the proposed micellar block is soft water and water containing inorganic salts in brine (for example, rain, river, lake, groundwater aoAaj,
50
50 ,
about
0
five
combined with oil and sea water),
In cases where the alpha-olefin sulfonate, internal olefin sulfonates, which have good resistance to hard water, are used as a necessary component (surfactant) in the micelle blocks, micelle units characterized by excellent hard water resistance, on the order of 5000 ml of magnesium ions (approximately 2.6% by weight of MgSO4 sulphate). The proposed micelle blocks are also characterized by extremely high resistance to alkali metal salts. may contain water in which the content of alkali metal salts may be up to 10% by weight, inclusive regardless of the type of alkali metal salts. In cases where an adequate surfactant is used together with internal olefin sulfonate, or when a particular type of surfactant coagent is selected, a brine containing up to about 15% by weight, inclusive of inorganic salts, can be used to prepare a micellar block. An increase in micelle blocks and inorganic salts leads to a further decrease in the interfacial tension between oil and water.
Thus, water (or brine) suitable for preparing the proposed micelle blocks may contain from about 0 to about 15 weight%, preferably from 0.5 to 12% by weight, more preferably from 1 to 10% by weight of inorganic salts. Typical examples of inorganic salts contained in water (or in brine) are such salts as NaCl, KGl, NagSO and. For example, seawater containing about 3.5% by weight of various inorganic salts contains about 1600 mpODa in terms of ions magnesium) divalent metal ions. This salt concentration is within a preferred concentration range of about
Internal olefin sulfonates suitable for use as an essential surfactant are compounds obtained by sulfonating internal olefins containing as the main component a mono-olefin of vinylene type characterized by the following general formula:
R-CH C-H-R,
where R and R are independently linear or branched hydrocarbon radicals having 1 or more carbon atoms, provided that the total number of carbon atoms for R and R is in the range of from 8 to 28, preferably from 10 to 24 , and containing about 33 wt.% (about 1/3 of the amount of olefins) or less of mono-olefins of the three-substituted type. Neutralization of sulphonated products with noMODtbm suitable bases is carried out and, if necessary, the neutralization products are hydrolyzed. The thus obtained internal olefinic sulfonates usually contain from about 20 to 60% by weight of alkynylsulfonates, have their double bonds, about 40-80% by weight of hydroxyalkanesulfonates, and also about 80% by weight or more monosulfonates and about 20% by weight. % and less disulfonate. However, internal olefin sulfonates having compositions differing from the indicated compositions and ratios can be obtained by appropriate selection of sulfonation conditions and hydrolysis conditions. An increase in the number of carbon atoms affects (there is a tendency) an increase in the ratio of composition of alkyl sulfonate, and an increase in the molar ratio between sulfonating agent and internal olefin during the sulfonation reaction leads to an increase in the ratio of the composition of the disulfonate
Internal olefin sulfonate with relatively high lipophilicity or internal olefin sulfonate with relatively high hydrophilicity can be used in the proposed micelle blocks, depending on the properties of the oil horizons and underground reservoirs, water used (or brine) and surface-active soagens.
ten
- 15 20 25
35
40
50
five
Comrade Internal olefin sulphonyls should contain 12–26 carbon atoms, even better, if 50 Vg, s.% And more would be 006011 internal olefinic sulphones containing 14–22 carbon atoms,
The intra olefin sulfonyl compounds can be alkali metal salts, alkaline earth metal salts, ammonium salts, their organic amine salts. Counted cations (counted) are sodium, potassium, magnesium, calcium, ammonium and alkanol ammonium cations, sodium salts easily accessible and low cost
Examples of internal olefin sulphonates suitable for the preparation of micelle blocks are internal olefin sulphonates containing 1: 10, 12, 14, 16, 18, 20, 22, 24, 26, 12-16, 14-16, 14-18. , 14-20, 15-18, 15-20, 16-18, 16-20, 18-20, 18-24, 20-24, 25-28, 20-30 carbon atoms. These sulfonates can be used in pure form. or in the form of mixtures of
Micellar blocks contain about 3–30 wt.% Surfactant version4. However, it is desirable that these micellar blocks contain approximately 5–25 wt.% Surfactant, taking into account low interfacial tension and moderate cost. The number of higher internal olefin sulfonates containing 5x 10-30 carbon atoms should be at least 50 ° C% and more, preferably 60% by weight or more relative to the total amount of surfactants contained in the micelles pry blocks
The hydrocarbons used as oil components in the micelle blocks are, for example, oil, liquefied petroleum gas, crude gasoline (naphtha, heavy gasoline, naphtha), kerosene, diesel fuel and petroleum fuel. It is preferable to use the extracted oil due to its low cost and availability, since its composition is similar to the composition of oil containing in underground tanks. Micelle blocks may contain about 4 to 90 wt.% Hydrocarbon. A desirable concentration of hydrocarbons should be in the range of about 5 to 40 wt.%, Thereby achieving an oil-in-water emulsion, since using large amounts of hydrocarbons is uneconomical. .
Surface-active coagents used for the production of micelle blocks are the necessary components for obtaining a microemulsion associated with surface-active substances. Surface-active coagents suitable for use in accordance with the invention are such compounds. MIs that have an alcoholic hydroxyl group. The required surface active agents are alcohols characterized by the following general formula:
R OCCHgCH O) H,
where n is a number from O to about 4; R is an alkyl or alkenyl group,
containing 2-8 carbon atoms when it is equal to O, and an alkyl, alkenyl or alkylphenyl group containing 6 to 18 carbon atoms when n is not equal to O 0 Aliphatic groups R can belong to either linear or branched groups.
Examples of such alcohols are ethanol, propanols, butanols, pentanoles, hexanols, 2-methylhexanol or
other octanols, polyoxyethylenehexyl ethers (p 1), polyoxyethylene decile ethers (p 2), polyoxyethylene tridecyl ethers (p 4), polyoxyethylene butylphenyl ethers (and 2), polyoxyethylene nonylphenyl ethers (ii) 3) and polyoxy-ethylenedodecylphenyl ethers (p 4) s,
The micelle blocks offered may contain generally 0.1 to 20 wt.% Surfactant coagents. However, the required concentration of surfactant coagents is in the range of about 1 to 10% by weight, in terms of the stability of microemulsions and decreasing. interfacial tensions between oil and water.
Mycelial blocks contain internal olefin sulfonates as necessary or basic
0 5 0
five
ABOUT
,
DO 45
P
55
surfactants. However, other co-surfactants can also be included together with internal olefin sulfonates, taking into account the required interfacial tension between oil and water, the required viscosity, the adsorptive capacity of surfactants to other rocks, underground reservoirs, and also the cost and availability of surfactants.
Examples of such auxiliary surfactants are anionic surfactants and nonionic surfactants, such as sulfonates, petroleum (petroleum sulfonates), alkyl benzene sulfonates, sulfates oksietilenalkilovogo poly ether, dialkyl sulfosuccinates, alpha-olefinically sulfonates, paraffin sulfonates , lower internal olefinic sulfonates, soaps,.-higher alcohol ethoxylates, alkylphenol ethoxylates, polyol-esters of fatty acids, alkylol-amides of fatty acids p Yes, and polyoxyethylene amides of fatty acids.
Viscosity, micelle blocks. is lower than the viscosity of micellar blocks prepared using alpha-olefin sulfonate. In cases where a micellar block with high viscosity is needed, then a suitable compressing agent, such as, for example, a solution pHMbrti in water is a polymer, can be added to the micelle block. As examples of thickening agents suitable for use in the preparation of micelle blocks, heteropolysaccharides derived from microorganisms can be mentioned; naphthalenesulfonic acid and formaldehyde condensates, polyacrylamides, polyacrylates, hydroxyethylcellulose and carboxymethylcellulose
The micelle blocks can be prepared using known methods. For example, hydrocarbons, surfactants, an aqueous medium, and surfactant coagents can be mixed using any mixing method using conventional:
71
devices, mixing temperatures and mixing pressures.
Example 1. Preparing compositions of micelle blocks containing anionic surfactants, surfactant coagents, hydrocarbons and an aqueous medium.
- Used anionic surfactants:
sodium s. inner olefin sulfonate (lOS-Na);
sodium Cj Cj4 internal olefin sulfonate (lOS-Na);
sodium apf olefin sulfonate (AOS-Na);
sodium alpha-olefin sulfonate (AOS-Na) or petroleum sulfate TRS-10, manufactured by Witco Chemical Corp.
Composition
Anionic surfactant (surfactant)
C, 4-C, 8 lOS-Na
Cjo-C, 4lOS-Na
C, 4-C, 8 AOS-Na Cjo-C, 4 AOS-Na Petroleum sulfonate agent surfactant
Amyl alcohol, 4
Isoprogogo alcohol.
hydrochloride
Kerosene8
Oil fuel ode
Morska 72
mkka Properties
Visual transparency about
16 16 16
1D
8 8 8 24 24
72 72 56 56 72
X x
3787888
The surface coagents used were amyl alcohol or isopropyl alcohol. The hydrocarbons used in this case were kerosene or petroleum fuel (ASTM No. 2 petroleum fuel). The aqueous medium consisted of seawater characterized by a salt content of about 3.5% and a concentration of alkaline earth metal ions of 1600 ppm, or soft water of
The micellar blocks were initially added to the mix by mixing the surfactant and the aqueous medium, and then adding the surfactant co-agent and hydrocarbon to the mixture while mixing them. The composition and properties of the micellar blocks prepared in this way are listed in Table “G,
Table 1
Ja
10.5
10.5
1D
, 10.5
10.5
4.5 4.5 4.5 4.5
25.5 25.6
8.5 8.5
59.5 59.5 76.5 76.5
o X o X
Indicators
Sample
IIj.Jl.TiriLLjLiIZLJ


0.6А 18
92
Indicators





  .
, 6

24
 71718 18
.
68 68 72 72 56

1378788
ten
Prod-giseiny tab.1
Sample
ten
0,69 22
96
0.12 - 19
98
0.11 5
95
15
Continuation of table 1
14 14 14
14
14 14
6 6
6 6
40 24
24 40 50
40 40
56 40 30 "about 56 40 40
ooo oo to
0.31 0.230.070.06 0.050.82 161823 2755
969598 95
- comparative examples.
7P
EXAMPLE 4 The p-Coagent micelles samples were used for a smart block using the viscosity method of the micellar block, Example 1, except that the compositions and properties of the samples were pre-alcohol and other surfactants in Table 4. .
Composition
Anion Surfactant
C, 4-C, in lOS-Na 1414
C, -C, 10S-Na

6 5


24 22

Continuation of table 3
25
Table 4
13 16 10.5 10,510.5 14
4.5 3
25.5 23.8 8
24
17
Indicators
38
T 39 T 40 GAG D 42 f 43 J 44 D 45
Water
Morska
water5656

Brine
Ethylene glycol3
Propylene glycol
Properties
Visual
transparency is about
Interfacial
tension
x10 dyn / cm 0,78 0,6
Viscosity cp 32 12
Extract
oil,% 95 96
59.5 59.5 68
72 7256
0.4 32
98
0.53 6
95
96
96
1.5
1.78 1.8 0.57 0.4 7 4 5 25
97 98
EXAMPLE 5, Samples of micelles of the ry block. were prepared according to the method of Example 1, except that the counterions of the internal olefin sulfonates were changed.
Continuation of table 4
Sample
1.5

96
96
1.78 1.8 0.57 0.42 7 4 5 25
97 98
The compositions and properties of the resulting samples are listed in Table 5 (in samples 46-54, monovalent cations, and in samples 55-60, divalent cations).
Example 3: Samples of micelles of the unitary block were obtained according to the method of Example 1, except that different brines were obtained by adding 1% by weight of sodium chloride and magnesium chloride and / or chloride.
,, lOS-Na Sao-CM lOS-Na
121216
10.51
Oil sulphonate
Coagent surfactant Amyl alcohol



16 8.5 16
64 76.5
64
Ca1500 Mg 2000 + ion - ION Ca 1000- Properties
Visual transparency
calcium in order to provide target values of bivalent metal ion concentrations in demineralized water.
The compositions and properties of the samples are presented in the table.
Table 3
10.5
4.5 4
4.5
17 8
18
25.5
68
72
72
59.5
11 1
in Table 1 and in the following tables, the abbreviations 10S and AOS refer to the internal olefin sulfonate and alpha olefin sulfonate, respectively. The visual appearance was determined in accordance with the following gradation:
o - microemulsion was obtained;
X - was prepared to a greater extent than microemulsion suspension.
The interfacial tensions listed in the tables refer to interfacial tension between the micelles, rs blocks and oil. Extract
Indicators
23 T 24 I 25 I 26 G 27 T 28 T 66 I 67 T

a
- sixteen

3
sixteen

6A

about
10.5
sixteen
4.5
17
at 8
72

1.4
eight
95
0.10 0.27 0.95 0.52 18 12 42 19
97
95
95
98
comparative pgimery.
88 12
oil (%) was determined in accordance with the method of Yamazaki.
Samples 1, 5, 7, 9, 11, 13 and 15-19 are used in accordance with the invention, and samples 2-4, 6, 8, 10, 12, 14 and 20-22 are comparative examples.
EXAMPLE 2 Micelles of the real block were obtained according to the procedure of Example 1, except that various brines were used, obtained by dissolving sodium chloride in demineralized water to a predetermined salt concentration. The composition and properties of the samples are listed in Table 2.
table 2
68
10.5
10.5
thirty
H
10.5
10.5
4.5
 S
0.1
20
4.5
4.5
8.5
25.5
4.9
20
17
17
59.5
6c
92
92
thirty
76, J
72
68
0.52 19
98
0.07 20
97
0.07 19
95
0.09 0.06 0.09 P 15 36
94
92
97
Example 6. Samples of micelle-new sulfonate were used instead of the block were prepared by method. Dice of example 1, except. The compositions and properties of the resulting two or more internal olefins are listed in Table 6,
Table
Nionic surfactant composition
C, 3-C, lOS-Na
 l ° S-Mg lOS-Ca
C, ° C. LOS-Mg C.5-C. and OS-Na
6 5
6 5
five
C j-C IOS-NH, So-C, slOS-N

Coagent surfactant butanol
Amyl alcohol
Hydrocarbon Kerosene Oil
Water
Brine, NaCl 0.5%, 0%
Sea water
Properties
Visual transparency
5 1520 30 20
. -5 80 60 50
65 7569
20
69
Interfacial tension
Viscosity
Oil recovery,%
0.34 0.08 0.02 0.24 0.040.160.07
812727221820
9698
97
9697
94
98

权利要求:
Claims (1)
[1]
Invention Formula
A micelle solution to displace oil from the formation, including a hydrocarbon, a surfactant, an auxiliary surfactant, and water, characterized in that, in order to enhance oil recovery, the solution contains an olefin sulfonate with an internal unsaturated oil as a surfactant. a bond containing 10–30 carbon atoms, and as an auxiliary surfactant — alcohols of the general formula -,
R 0 (CH.jCHjO) H,
97
9697
94
98
where n is a number from O to 4;
R is Cd-Cd-alkyl or C-Cd-appenyl, when n is O, and Cj is Cg-alkyl or -alkenyl or Cg-C j-alkylphenyl, when n is 1-4,
in the following ratios of solution components, masd:
Hydrocarbon4-70
Olefin sulphonate with internal bond 3-30
Auxiliary PAV.0,1-20
Water15-92

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同族专利:

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公开号 | 公开日

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US4555351A|1985-11-26|

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JPH0157235B2|1989-12-05|

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JPS58131295A|1983-08-05|

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US4532053A|1985-07-30|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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JP57010858A|JPH0157235B2|1982-01-28|1982-01-28|

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