Emulsion self-dispersion relative-permeability regulator and preparation method

A technology of interpenetration regulator and dispersant, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of small feasibility and poor economic benefits, and achieve strong applicability, reduce mining costs, and adjust ability strong effect

Active Publication Date: 2019-03-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the whole oilfield enters the medium-high water cut period, the method of enlarging the injection-production pressure difference and increasing the injection multiple is adopted to improve the sweep coefficient and oil washing efficiency, such as subdivision, infill adjustment, flow field reconstruction, well pattern reorganization, stratum reorganization, Intensified injection and production, chemical flooding, etc., under low oil prices, their economic benefits are poor and their feasibility is relatively small

Method used

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preparation example Construction

[0029] The present invention also provides the preparation method of described emulsion self-dispersion interphase osmosis regulator, it comprises the following steps:

[0030] (1) prepare oil-soluble dispersion agent, it comprises:

[0031] (1-1) Mix the components of the oil-soluble dispersant evenly and control the temperature at 3-8°C;

[0032] (1-2) logical nitrogen, remove the oxygen in the above-mentioned solution;

[0033] (1-3) Add an oil-soluble initiator, control the temperature at 3-8°C, initiate polymerization under normal pressure; then gradually raise the temperature to 90-95°C, continue the reaction, and obtain an oil-soluble dispersant;

[0034] (2) Prepare a water-soluble dispersant: mix the components of the water-soluble dispersant uniformly to obtain a water-soluble dispersant;

[0035] (3) The oil-soluble dispersant and water-soluble dispersant are mixed in proportion based on the water content of the reservoir.

[0036] In a preferred embodiment, the ...

Embodiment 1

[0042] Preparation of emulsion self-dispersing phase osmosis regulator:

[0043] (1) Synthesis of 1 ton of oil-soluble dispersant: 210 kilograms of stearyl acrylate, 20 kilograms of acrylic acid, 110 kilograms of vinyl acetate, 60 kilograms of styrene, and 100 kilograms of dibutyl maleic anhydride are added to the reactor, and the rest are No. 180 (refined) aromatic solvent oil, mix it evenly; pass nitrogen for 30 minutes, then control the temperature to 5°C; stir for 30 minutes, add 2 kg of benzoyl peroxide after 15 minutes, stir for 30 minutes and then gradually heat up, Raise to 90°C within 2.5 hours, control the temperature at 90°C and react for 1.5 hours to obtain an oil-soluble dispersant;

[0044] (2) Synthesis of 1 ton of water-soluble dispersant: 200 kilograms of sodium lauryl sulfate is added to the reaction kettle, then 50 kilograms of absolute ethanol and 150 kilograms of OP-10 are added and stirred evenly, and the rest is deionized water. Obtain water-soluble dis...

Embodiment 2

[0047] (1) Synthesis of 1 ton of oil-soluble dispersant: 200 kilograms of stearyl acrylate, 10 kilograms of acrylic acid, 100 kilograms of vinyl acetate, 50 kilograms of styrene, and 140 kilograms of dibutyl maleic anhydride are added in the reactor, and the rest are No. 200 (refined) solvent oil, mix it evenly; pass nitrogen for 30 minutes, then control the temperature to 5°C; stir for 30 minutes, add 2 kg of benzoyl peroxide after 15 minutes, stir for 30 minutes and then gradually heat up, in Raise to 90°C within 3 hours, control the temperature at 90°C and react for 2 hours to obtain an oil-soluble dispersant;

[0048] (2) Synthesis of 1 ton of water-soluble dispersant: add 250 kg of sodium tetradecyl sulfate to the reactor, then add 40 kg of absolute ethanol, 100 kg of OP-12 polyether and stir evenly, and the rest is deionized water after stirring evenly That is, a water-soluble dispersant is obtained.

[0049] (3) The products synthesized in steps (1) and (2) are mixed a...

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Abstract

The invention relates to an emulsion self-dispersion relative-permeability regulator. The emulsion self-dispersion relative-permeability regulator comprises an oil-soluble dispersant and a water-soluble dispersant, wherein the volume ratio of the oil-soluble dispersant to the water-soluble dispersant is (1: 9) to (9: 1); based on 100 parts (by weight) of the oil-soluble dispersant, the oil-solubledispersant is prepared from the following ingredients: 20-35 parts of octadecyl acrylate, 1-5 parts of acrylic acid, 10-18 parts of vinyl acetate, 5-12 parts of styrene, 10-20 parts of dibutyl maleicanhydride and the balance of solvent oil; based on 100 parts (by weight) of the water-soluble dispersant, the water-soluble dispersant is prepared from the following ingredients: 15-30 parts of water-soluble anionic surfactant, 10-25 parts of water-soluble nonionic surfactant, 5-12 parts of anhydrous ethanol and the balance of deionized water. The invention further relates to a preparation methodof the emulsion self-dispersion relative-permeability regulator.

Description

technical field [0001] The invention relates to an emulsion self-dispersing phase osmosis regulator and a preparation method. Background technique [0002] At present, there are three major contradictions in domestic old oilfields. The plane is flooded seriously. The number of non-absorbent small layers reaches about 25%, the non-absorbent thickness is about 20%, and the inner layer water-flooded thickness is only 30%. After the whole oilfield enters the medium-high water cut period, the method of enlarging the injection-production pressure difference and increasing the injection multiple is adopted to improve the sweep coefficient and oil washing efficiency, such as subdivision, infill adjustment, flow field reconstruction, well pattern reorganization, stratum reorganization, Intensified injection and production, chemical flooding and other oil recovery, under the low oil price, its economic benefit is poor, and its feasibility is relatively small. Therefore, it is still n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/584C09K8/60C09K8/88C08F220/18C08F220/06C08F212/08C08F218/08C08F222/26
CPCC08F220/18C09K8/584C09K8/588C09K8/604C09K8/882C08F220/1818C08F220/06C08F212/08C08F218/08C08F222/26
Inventor 王增林靳彦欣刘希明郭宏伟陈雷辛爱渊赵玲刘军胡秋平薄纯辉
Owner CHINA PETROLEUM & CHEM CORP
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