• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A microemulsion comprises a mixture of water containing an excess of 60 g/l of mono- and divalent salts, a hydrocarbon, an amphoteric surfactant of the formula: <IMAGE> wherein m is a whole number ranging from 1 to 5, inclusive, n is a whole number ranging from 1 to 22 inclusive, X<-> is a member selected from the group consisting of COO<->, SO3 and a sulphonated ethylene polyoxide, and R1 and R2 are hydrocarbon groups containing from 1 to 22 carbon atoms and a co- surfactant comprising at least one C1 to C10 alcohol. This microemulsion may be used for recovering petroleum in beds containing water of high salinity.
    公开号:SU1090264A3
    申请号:SU782640396
    申请日:1978-07-07
    公开日:1984-04-30
    发明作者:Кост Жан-Франсуа；Гранжетт Анри
    申请人:Сосьете Насьональ Елф Акитэн (Продюксьон) (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the development of oil fields using microemulsions for formations with high salinity of formation waters. It is known to obtain micro-emulsions with distilled water and hydrocarbons containing surfactant and co-surfactants p. A known emulsifier for the preparation of microemulsions used to extract oil based on coenzide surfactant (co-surfactant) is G2. A disadvantage of the known microemul is that both of these types of surface-active ion exchangers react in a highly concentrated salt medium with the risk of precipitating, but are adsorbed on the mineral particles. The purpose of the invention is to increase the stability of a microemulsion with an elevated salt content in reservoir waters. This goal is achieved by the fact that the emulsifier for the preparation of microemulsions used to extract oil on the basis of surfactant and codenside, as a surfactant, it contains a compound of the general formula CHg-COOKa where R is an alkyl chain with carbon distribution corresponding to fatty acids of carbon, acids with carbonic acids chains from C ;, to C, and the volume ratio of surfactant to codenside is 1: (O, 5-4.5). A mixture of i-hexanol, n-octanol and isopropanol is used as a coenzide. An amphoteric surfactant belonging to the group of alkyl betaines, α-amphosol can be represented by the following general formula R-N-CHj-COgNa CHt 41 where R is the residual residue of copra fatty acid. Copra fatty acids are a mixture of acids with different chain lengths from C to C wt.%: Cj7.8-9.5, 5-9.7 44-51 13-18.5, 5-10.5 (exemplary) 1-3 (unsaturated) 6-10.8 The surfactants are selected from the group of alcohols with, depending on their distribution coefficient between the water and the hydrocarbon component of the microemulsion. To study the stability of microemulsions, mixtures are prepared that include an amphoteric surfactant; co-surfactants having the structure of alcohols; hydrocarbon: crude oil, petroleum fraction - gas oil - keosin, or refined crude oil fraction, or liquefied gas; water containing mono- or divalent ions with a concentration greater than 60 g / l. For comparison of the formation of micromulsions in saline media, take an emulsifier with a classical anionic surfactant. Emulsifier (1) containing surfactant Hz BN-CH2-C02lfaCl, de R-Su ((} (copa fatty acids), codenzide,%: Isopropanol 72 n-Hexanol 14 n-Octanol 14 Emulsifier (2) containing surfactant sodium auryl sulfonate, codenzide, %: Isopropanol 72 N-Hexanol 14 H-Octanol14 Aslo-dodecane Table 1 shows the results of microamulsion stability with oil in a highly salty medium, especially in the presence of divalent ions even at high temperatures. C is a surfactant and a surfactant; E is water from a deposit; P - hydrocarbon. Each built-up section to the curve shows that the area of homogeneous solutions or microemulsions is located above it, and the area of multiphase composition below it. Ex. 1. Water from the field site containing 200 g / l of NaCfc; - dodecane and surfactants with the alkylbetaine structure, where R is the copra radical in an aqueous solution containing 25% of the active substance and 18% isopropanol; the co-surfactant substances are n-hexanol and H-octanol mixed in a 50-50 volume ratio. The volume ratio of surfactant to codenzide varies from 0.1 to 1.5, preferably in the range of 0.5-1.0. The microemulsion is prepared as a simple mixture of field water, a dodec as a hydrocarbon, a mixture of surfactant and codenside. The curve in the diagram (figure 1) shows that it is possible to obtain an extensive range of microemulsions from water from fields with 200 g of NaC per liter of dodecane that are stable in time and at 80 C. Example 2. The triple diagram (figure 2) defines the region of existence microemulsions formed and water with 100 g / l of SASS dodecane AND the same systems of surfactants and alcohols described in example 1. Example 3. The diagram (Fig. 3) defines the region of existence of microemulsions formed from water with an average salt content 60 g / l NaCt and 15 g / l CaCl, dodecane and mixtures of amphosol in an aqueous 35% plant thief with isopropanol and hexanol mixed in 1/3 - 2/3 volume ratios. The ratio of surfactant / alcohols vary from 0.25 to 4.5. The stability of microemulsions is as good as in previous cases. Example 4. The diagram (figure 4) defines the region of existence of stable microemulsions and resistance to heat, which can be obtained from water from a deposit with a high salt content of 100 g / l NaCt and 20 g / l CaCl, dodecane and surfactant system - alcohols, as indicated in Example 3. The surfactant / alcohols volume ratio is 0.30-4.50. The following are the compositions of microemulsions according to examples 1-4. Table 2 lists the weight percentages of points located on the solution splitting curve for the corresponding maximum ionic forces. Thus, lambs prepared using this emulsifier are resistant to highly saline water and elevated reservoir temperature. Table 1
    58.9
    0.5
    one
    3
    4.5
    60,8
    0.5
    one
    3
    4.5
    80
    200
    f + + f
    f
    100
    table 2
    8,658,932,5
    22.238,639.2
    31,323,345,4
    49,415,934,7
    57.54,837,7
    9,160,830,1
    21,537,640,9
    32,824,642,6 45,314,640,1
    54.94,640,5
    Continued table. one
    Emulsifier
    Continued table. 2
    10,067,422,6
    27.747,225.1 37.027.036.0
    49,615,734,7 59,34,835,9
    10,768,520,8
    28.846,924.3
    39.7.27,632.7 51,515,533.0 60.34,735.0
    权利要求:
    Claims (2)
    [1]
    1. EMULSIFIER FOR PREPARATION OF MICROEMULSIONS used to extract oil based on a surfactant and a cotenzide; characterized in that, in order to increase the stability of the microemulsion with a high content of salts in the formation water, c. as a surfactant, it contains a compound of the general formula
    RH xCHZ X CH 3
    SG
    CHz-COONO where R is an alkyl chain with a carbon distribution corresponding to copra fatty acids, acids with carbon chains from
    D ° C44, and the volumetric ratio of surfactant to coenzid is 1: (0.5-4.5).
    [2]
    2. The emulsifier according to claim 1, wherein the mixture of N-hexanol, K-octanol and isopropanol is used as the co-benzide.
    M / uumMMAMADLAALADO.
    FIG. 1
    类似技术:
    公开号 | 公开日 | 专利标题
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    US3622518A|1971-11-23|Water-in-oil invert emulsions
    US4468342A|1984-08-28|Blends of surfactant homologues adjusted to salinity during waterflooding
    US4811788A|1989-03-14|Surfactant combinations and enhanced oil recovery method employing same
    EP0061932B1|1985-06-19|Composition for use in oil recovery, its method of use, and novel surfactant compounds
    US4610305A|1986-09-09|Oilfield flooding polymer
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    同族专利:
    公开号 | 公开日
    DE2829617C2|1982-02-11|
    JPS5437002A|1979-03-19|
    NL7807384A|1979-01-10|
    FR2396866B1|1982-10-08|
    DE2829617A1|1979-01-18|
    FR2396866A1|1979-02-02|
    DK306478A|1979-01-09|
    BR7804406A|1979-03-13|
    OA06005A|1981-06-30|
    RO83822B|1984-04-30|
    IT7825480D0|1978-07-10|
    CA1106587A|1981-08-11|
    IT1096925B|1985-08-26|
    NO149859C|1984-07-04|
    GB2001377B|1982-01-20|
    GB2001377A|1979-01-31|
    RO83822A|1984-04-02|
    NO782390L|1979-01-09|
    NO149859B|1984-03-26|
    BE868821A|1978-11-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3275552A|1963-04-23|1966-09-27|Milchem Inc|Well treating composition and method|
    US3939911A|1975-03-14|1976-02-24|Texaco Inc.|Surfactant oil recovery process usable in high temperature formations containing water having high concentrations of polyvalent ions|
    US4008165A|1975-03-14|1977-02-15|Texaco Inc.|Surfactant oil recovery process usable in high temperature formations having high concentrations of polyvalent ions|
    DE2532469C3|1975-07-19|1978-10-12|Institut Fuer Erdoelforschung, 3000 Hannover|Use of betaines in oil production|
    DE2600779C2|1976-01-10|1986-08-28|Degussa Ag, 6000 Frankfurt|Use of betaines|
    DE2600778C2|1976-01-10|1985-01-03|Henkel KGaA, 4000 Düsseldorf|Use of betaines in oil production|DE3025383C2|1980-07-04|1982-05-13|Th. Goldschmidt Ag, 4300 Essen|Use of mixtures of betaines or amine oxides and polyoxyethylene esters of naphthenic acids in oil production|
    US4370243A|1981-02-09|1983-01-25|Mobil Oil Corporation|Oil recovery by surfactant-alcohol waterflooding|
    US4479894A|1981-02-09|1984-10-30|Mobil Oil Corporation|Oil recovery by surfactant-alcohol waterflooding|
    US4502540A|1981-06-01|1985-03-05|Mobil Oil Corporation|Tertiary oil recovery|
    DE3265256D1|1981-10-22|1985-09-12|Basf Ag|Application of amine-sulphur-dioxide adducts and sulfitobetaines as bactericides against sulfate reducing bacteria|
    DE3143362A1|1981-11-02|1983-05-11|Basf Ag, 6700 Ludwigshafen|Use of sulphitobetaines as bactericides against sulphate-reducing bacteria|
    DE3431414A1|1984-08-27|1986-02-27|Hoechst Ag, 6230 Frankfurt|MOBILITY CONTROL OF GAP, SLOT OR PORE FLOWS|
    US4976315A|1989-11-06|1990-12-11|Texaco Inc.|Use of taurine additives in enhanced oil recovery with anionic surfactants|
    US5376397A|1993-05-06|1994-12-27|Kraft General Foods, Inc.|Microemulsions of oil and water|
    US7220709B1|1999-08-26|2007-05-22|Bj Services Company|Process of diverting stimulation fluids|
    US6432885B1|1999-08-26|2002-08-13|Osca, Inc.|Well treatment fluids and methods for the use thereof|
    US6509301B1|1999-08-26|2003-01-21|Daniel Patrick Vollmer|Well treatment fluids and methods for the use thereof|
    EA200201078A1|2000-04-07|2003-04-24|Шлюмбергер Текнолоджи Б.В.|WELL FLUIDS AND THEIR APPLICATION|
    AU5602301A|2000-05-03|2001-11-12|Trican Well Service Ltd|Fracturing fluid|
    US7919437B2|2006-06-26|2011-04-05|Bp Exploration Operating Company Limited|Wellbore fluid comprising sulfonated copolymers with pendant alkyl groups|
    MX346963B|2012-09-21|2017-03-07|Inst Mexicano Del Petróleo|Process for preparing a micro emulsion for improving the flow of heavy hydrocarbons.|
    US11066594B2|2017-03-09|2021-07-20|Saudi Arabian Oil Company|Fluoropolymers to reduce retention of nanosurfactants to carbonate reservoir rock for applications in oil fields|
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    US11078405B2|2017-03-09|2021-08-03|Saudi Arabian Oil Company|3 in 1 foam formulation for enhanced oil recovery including conformance control, ultra-low interfacial tension, and wettability alteration|
    CN110382661A|2017-03-09|2019-10-25|沙特阿拉伯石油公司|Nanometer surfactant for improving and intensified oil reduction is applied|
    US11066914B2|2017-03-09|2021-07-20|Saudi Arabian Oil Company|Foam from low cost petroleum sulfonate surfactants for fracturing along with wettability alteration|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7721093A|FR2396866B1|1977-07-08|1977-07-08|
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