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Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method

A composition and oil displacement technology, which are applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor oil displacement efficiency and the like

Active Publication Date: 2016-03-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems to be solved by the present invention is the problem of poor oil displacement efficiency of the oil displacement composition in the prior art, and a new oil displacement composition is provided

Method used

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  • Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method
  • Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method
  • Oil-displacing composition, preparing method of oil-displacing composition and intensified oil production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) The anionic surfactant structural formula of preparation is as follows, wherein R 1 The carbon chain distribution is: C 12 72.3wt%, C 14 27.7wt%, m 1 +m 2 = 3, n 1 +n 2 =20, m 3 +m 4 =8.

[0066]

[0067] Add 192.6 grams (1 mole) of mixed twelve / fourteen (C 12～14 ) amine, 9.5 grams of potassium hydroxide, when heated to 80-90°C, turn on the vacuum system, dehydrate under high vacuum for 1 hour, then replace with nitrogen for 3-4 times, adjust the reaction temperature of the system to 110°C and slowly introduce 132.9 grams (3.02 moles) of ethylene oxide, the control pressure is ≤0.50MPa, after the reaction of ethylene oxide is completed, slowly feed 1171.6 grams (20.2 moles) of propylene oxide at 150°C, the control pressure is ≤0.60MPa, wait After the propylene oxide reaction, the temperature was adjusted to 130° C. and 354.2 g (8.05 moles) of ethylene oxide was slowly introduced. After the reaction, lower the temperature to 90°C, remove low boilers in a...

Embodiment 2

[0075] (1) with 【Example 1】, the difference is that mixing twelve / fourteen (C 12～14 ) amine polyoxyethylene (3) polyoxypropylene (20) polyoxyethylene (8) ether and sodium chloroacetate do not need to be treated with acid after reacting, that is, after reflux reaction for 3 hours, change the distillation device to remove the solvent toluene / distillate Toluene (v / v=1), add water to the residue and stir evenly to obtain nonionic and anionic mixed surfactant S-2 containing sodium chloride and sodium hydroxide.

[0076] (2) Prepare the S-2 and modified polyacrylamide (P1, copolymerized AM / AMPS molar ratio = 2 / 1, viscosity-average molecular weight 15 million) aqueous solution prepared in step (1) respectively with Shengli Oilfield simulated formation water 1, and stir 4 hours, all the other are the same as [Example 1] (2), and the results are shown in Table 2. The oil-water interfacial tension of different concentrations of S-2 aqueous solutions, see figure 1 shown.

[0077] (3) ...

Embodiment 3

[0081] (1) The anionic surfactant structural formula prepared is as follows, wherein, m 1 +m 2 =8,n 1 +n 2 =16,m 3 +m 4 =15.

[0082]

[0083] Add 261 grams (1 mole) of dodecylaniline, 5.2 grams of sodium hydroxide and 13.1 grams of Anhydrous Potassium Carbonate in the 5L pressure reactor that stirrer is equipped with, carry out water removal and nitrogen replacement with [embodiment 1], Adjust the reaction temperature of the system to 110°C and slowly feed 354.2 grams (8.05 moles) of ethylene oxide, and control the pressure to ≤0.50 MPa. After the reaction of ethylene oxide is completed, slowly feed 933.8 grams (16.1 moles) ) Propylene oxide, control pressure≤0.60MPa, after the completion of the reaction of propylene oxide, adjust the temperature to 140°C and slowly feed 664.4 grams (15.1 moles) of ethylene oxide. After the reaction, the same post-treatment as in [Example 1] was carried out to obtain dodecylaniline polyoxyethylene (8) polyoxypropylene (16) polyoxyeth...

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Abstract

The invention relates to an oil-displacing composition, a preparing method of the oil-displacing composition and an intensified oil production method to mainly solve the problem that the oil-displacing efficiency of an oil-displacing composition is poor in the prior art. The oil-displacing composition is prepared from, by mass, 1 part of surfactant, 0-50 parts of a polymer which accounts for larger than 0 part and 0-50 parts of alkaline matter which accounts for larger than 0 part, wherein the surfactant is a mixture formed by non-ionic surfactant shown in the formula (1) and anionic surfactant show in the formula (2) at the mass ratio of 1:(0.1-1), R1 and R2 are the same or different C4-C40 aliphatic groups, or the same or different aryl groups replaced by saturated or unsaturated alkyl with C4-C30 linear chains or branched chains, Z1 is -R01Y1, R01 is selected from C1-C5 alkylidene or alkylidene replaced by hydroxyl, and Y1 is selected from SO3M or COON. The problem is well solved through the technical scheme, and the oil-displacing composition can be used for an oil field and intensified oil production. The formula (1) and the formula (2) can be seen in the specification.

Description

technical field [0001] The invention relates to an oil displacement composition, a preparation method thereof and a method for enhancing oil recovery. Background technique [0002] Enhanced oil recovery technology, that is, the enhanced (EOR) and improved (IOR) oil recovery technology commonly referred to abroad, can be summarized as improving water flooding, chemical flooding, heavy oil thermal recovery, gas flooding, microbial oil recovery and physical oil recovery, etc. Six aspects. At present, the enhanced oil recovery technologies that have entered the large-scale application in mine fields are concentrated in three categories: thermal recovery, gas flooding and chemical flooding, of which the production of chemical flooding is 5.18×10 4 m 3 / d or more, accounting for about 14.7% of the world's total EOR production. Chemical flooding is an enhanced measure to enhance oil recovery by adding chemical agents to the aqueous solution to change the physical and chemical pr...

Claims

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Application Information

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IPC IPC(8): C09K8/584
Inventor 沈之芹李慧琴吴国英李斌
Owner CHINA PETROLEUM & CHEM CORP
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