• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    The invention concerns the plugging of underground formations. …<??>The plugging agent used is aluminum hydroxychloride with hexamethylene tetramine, or a weak-base activator such as urea. …<??>The invention has applicants in the treatment of oil wells and the traversed formations.
    公开号:SU1514244A3
    申请号:SU864027789
    申请日:1986-07-01
    公开日:1989-10-07
    发明作者:Kolen Davidson；Alen Parker
    申请人:Etyud E Fabrikason Dovvel Shly；
    IPC主号:
    专利说明:

    The invention relates to the production of aluminum hydroxide • for blockage of underground rocks during oil development. The purpose of the invention is to increase the depth of penetration of aluminum hydroxide in the pores of the rocks and the period of its formation. For this, an aqueous solution of aluminum hydroxochloride of the formula A1 g (0H) 5 C1 "2.5H ^ O is treated with urea or hexamethylenetetramine at pH 4-4.5. Aluminum hydroxychloride is taken as a 1.5-6.0% solution, urea in the form of a 1-3% aqueous solution, and hexamethylenetetramine in the form of a 0.1-0.6% aqueous solution. Treatment of aluminum hydroxochloride with urea or hexamethylenetetramine is carried out with additives selected from the series: sodium sulfate, citric acid , tartaric acid, sodium fluoride, oxalic acid, fumaric acid and erythorbic acid with concentration 0.01-0.03 M in aqueous solution.The proposed method allows to increase the depth of penetration of aluminum hydroxide into the pores of rocks and the period of its formation. 3 ef f-crystals,
    10 tab.
    511 .... 1514244 AZ
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    The invention relates to the production of aluminum hydroxide for blockage of underground rocks during oil development. one
    The purpose of the invention is to increase the depth of penetration of aluminum hydroxide into the pores of rocks and the period of its formation,
    Example 1. A 3% solution of aluminum hydroxochloride is treated with a 3% solution of urea in distilled water. The initial pH is 4.2.
    At a temperature of 65 ° C, the time of gelation is approximately 3 days.
    PRI mme R 2. The method is carried out analogously to example 1. Aluminum hydroxychloride is taken in the form of a 5% solution. Gel time 8 hours
    Example The method is carried out analogously to example 1, Urea taken in the form of a 1% aqueous solution in distilled water. The gel time is approximately 6 days.
    EXAMPLE 4. The process is osugstrated as in Example 1 with the addition of a 5% strength solution of CacCl. The gel time is approximately 30 hours.
    Example 5. A 3% solution of aluminum hydroxochloride is treated with a 3% solution of urea at a pH of 4.3 and a temperature of 65 C. For this standard solution, the reaction in question leads to the formation of a solid gel within 72 hours . 35
    G1p and measure 6. The method is carried out analogously to example 5. The addition of sodium sulfate 0.02 M, gelation time 35 hours
    Example 7. The method is carried out in the anapogic manner of Example 5. The addition of sodium sulfate is 0.03 M. The gelation time is 20 h.
    II p and me R 8. The method is carried out analogously to example 5. Additive - 45
    citric acid is 0.01 M. Gel time is 40 h.
    II p and mep 9. The method is carried out as described in example 5. The addition of citric acid to 0.03 M. Vre; my gel - 5θ education 30 hours,
    II p ry measure 10. The method is carried out analogously to example 5. The addition of tartaric acid 0.01 M. The gelation time 48 hours 55
    Example 11. The method is carried out analogously to example 5. The addition of tartaric acid is 0.03 M. The gelation time is 35 hours
    Example 12. The method is carried out analogously to example 5. Addition of sodium fluoride to 0.01 M. The gelation time is 52 hours.
    Example 13. The method is carried out analogously to example 5. Addition of sodium fluoride to 0.03 M. The gelation time is 40 hours.
    EXAMPLE 14 The method is carried out analogously to Example 5. Addition of oxalic acid is 0.01 M. The gelation time is 42 h.
    Example 15. The method is carried out analogously to example 5. The addition of oxalic acid is 0.03 M. The gelation time is 33 h.
    Example 16. The method is carried out analogously to example 5. The addition of fumaric acid, 0.01 M. The gelation time is 55 hours.
    Example 17. The method is carried out analogously to example 5. The addition of fumaric acid is 0.03 M. The gelation time is 38 h.
    Example 18. The method is carried out analogously to example 5. The addition of erigorbic acid is 0.01 M. The gelation time is 55 hours,
    Example 19. The method is carried out analogously to example 5. The additive serum acid 0.03 M. The gelation time is 46 hours
    I! p and measure 20, Permeability tests.
    A sample in the form of a rod with a diameter of 5 cm, a length of 15 cm is injected with a standard solution prepared according to Example 5, with the addition of 5% citric acid. After that, the injection is stopped to form a solid phase. The initial permeability of the medium (3% DaC1) is 1 mD (millidarcy). The final permeability (3% N <301) is 53 mD.
    EXAMPLE 21 The sample is a pack of finely dispersed sandstone (i.e., the tube is filled with non-compressed sand) with a diameter of 8 cm and a length of 30 cm. The process is carried out analogously to example 20. Initial permeability of the medium (3% CaС1) is 1663 mD . Final permeability (3% ΝβΟΙ)
    130 md Lrmeer 22. The sample is a pad of sandstone with a diameter of 8 cm and a length of 55 cm. Process
    lead analogously to example 20. The initial permeability of the medium (3% ΝβΟΙ)
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    2360 md. Ultimate permeability
    (3% LaC1) 49 mD,
    Example 23. The sample is an uncured pack of sandstone with a diameter of 8 cm and a length of 55 cm. The initial permeability (3% NaCl) is 9843 mD. Permeability after the first treatment is 3250 mD. Permeability after the second stage of processing is 1004 mD.
    PRI me R 24. Prepare various solutions containing aluminum hydroxochloride (A1 g (0H) 5 C1 · 2.5 H 0), urea and ΝβΟΙ, and their temperature is raised to the test temperature. The initial pH value is 4-4.5.
    The test results are shown in table 1-6.
    PRI me R 25. Prepare solutions containing aluminum hydroxochloride, urea, NaCl, CaCl 2 or seawater. The process is carried out analogously to example 24.
    The composition of the applied sea water is listed in Table 7; the test results in the table.8.
    Example 26. Prepare solutions containing A1 2 (OH) 5 C1 , 5H 2 0 and hexamethylenetetramine (C ( .H, 2 P < ). The process is carried out similarly to examples 24, 25.
    The test results are presented in table 9 and 10.
    To select the optimal process parameters, you can use the presented Tables 1-10. One of the advantages of the compositions is their compatibility with salty media. The proposed formulations can be used when salt levels are several percent, including calcium salts or seawater, which opens up opportunities for working on the high seas.
    This method allows to increase the depth of penetration of alumina hydroxide into the pores of rocks and the period of its formation.
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    权利要求:
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    1. A method of producing aluminum hydroxide for blocking porous underground rocks during oil development
    10 by processing an aqueous solution
    alkaline-containing compound agent that regulates the pH of the medium, characterized in that, in order to increase the depth of penetration
    15 aluminum hydroxide in the pores of rocks and the period of its formation, as an aqueous solution of aluminum-containing compounds use 1.5-6.0% solution of aluminum hydroxochloride
    2θ of the formula A1 2 (OH) 5 C1 2.5 N 0, and as an agent that regulates the pH of the medium - urea or hexamethylenetetramine, while the treatment is carried out at pH 4-4.5.
    2. The method according to claim 1, about tl and h ayi and th with the fact that “urea is used in the form of a 1-3% aqueous solution.
    3. Method pop.1, characterized in that hexamethylenetetramine is used in the form of a 0.1-6.0% aqueous solution.
    4. The method of pop. 1, which differs from the fact that the treatment is carried out
    35 with additives selected from the range: sodium sulfate, citric acid, tartaric acid, sodium fluoride, oxalic acid, fumaric acid and erythoric acid, with concentration
    40 0.01-0.03 M in an aqueous solution.
    Priority points
    02.07.85 according to π.1 with a sign of treatment with urea; with a sign of processing ki hexamethylenetetramine on PP. 2 and 4.
    04/30/86 p.Z.
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    同族专利:
    公开号 | 公开日
    NO862647L|1987-01-05|
    NO862647D0|1986-07-01|
    CA1282667C|1991-04-09|
    EP0210427A1|1987-02-04|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8510272A|FR2584387B1|1985-07-02|1985-07-02|PROCESS FOR DELAYING AND CONTROLLING THE FORMATION OF GELS OR PRECIPITES OF ALUMINUM DERIVATIVES, COMPOSITIONS THEREOF AND APPLICATIONS IN PARTICULAR FOR THE EXPLOITATION OF OIL WELLS|
    FR8606434A|FR2598144B2|1986-04-30|1986-04-30|PROCESS FOR DELAYING AND CONTROLLING THE FORMATION OF GELS OR PRECIPITIES OF ALUMINUM DERIVATIVES, CORRESPONDING COMPOSITIONS AND APPLICATIONS IN PARTICULAR FOR THE EXPLOITATION OF OIL WELLS.|
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