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Barium and strontium scale inhibitor composition for oil recovery waterflood system of oilfield, and preparation method for same

A technology of water injection system and composition, which is applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. It can solve the problems of reducing the effect of scale inhibitors and prevent oil layer scaling damage , to achieve reuse, to solve the effect of scaling and corrosion

Active Publication Date: 2014-12-24
GANSU HEIMA PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012]Third, the cause of barium and strontium scaling in the oil production water injection system
Because polyphosphate is easily hydrolyzed into orthophosphate, it can not only reduce the use effect of these antiscalants, but also may change the less serious CaCO3 scale into very serious Ca 3 (PO4) 2 scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1, raw materials were weighed according to the following components and weight: polyanhydride 50kg, glucosamine acetate 23kg, sodium ethylenedienetriaminepentaacetate 4kg, sodium glycolate 5kg, sodium dihexyl sulfosuccinate 13kg, hydroxyl Sodium succinate 10kg, hexamethylenetetramine 6kg, sodium p-hydroxysulfonate 18kg, fatty alcohol polyoxyethylene sodium sulfate 5kg, amino acid sodium 6kg, polyethylene glycol 5kg, ethyl lactate 6kg, tert-butyl hydrogen peroxide Base 6kg, diethylene glycol laurate 0.3kg and water 68kg; The method that above-mentioned raw material is prepared oil field oil recovery water injection system anti-barium strontium scale agent composition is as follows:

[0057] 1. The above-mentioned polyanhydride, glucosamine acetate, sodium ethylenedienetriaminepentaacetate, sodium glycolate, sodium dihexyl sulfosuccinate, sodium hydroxysuccinate, hexamethylenetetramine and p-hydroxysulfonic acid Sodium, mixed with a conical mixing mixer, crushed w...

Embodiment 2

[0061] Example 2, raw materials were weighed according to the following components and weight: polyanhydride 46kg, glucosamine acetate 20kg, sodium ethylenedienetriaminepentaacetate 3kg, sodium glycolate 5kg, sodium dihexyl sulfosuccinate 12kg, hydroxyl Sodium succinate 8kg, hexamethylenetetramine 7kg, sodium p-hydroxysulfonate 17kg, fatty alcohol polyoxyethylene sodium sulfate 5.8kg, amino acid sodium 7kg, polyethylene glycol 4kg, ethyl lactate 6.5kg, hydrogen peroxide Tertiary butyl 4kg, diethylene glycol laurate 0.1kg and water 60kg; The method for preparing the barium strontium scale agent composition of oil field oil recovery water injection system by above-mentioned raw materials is as follows:

[0062] 1, with embodiment 1;

[0063] 2. Add the above-mentioned fatty alcohol polyoxyethylene sodium sulfate, amino acid sodium and 15kg water into the reaction tank, mix and stir for 40 minutes until uniform, and obtain the first mixed liquid;

[0064]3. Stir polyethylene gly...

Embodiment 3

[0066] Example 3, raw materials were weighed according to the following components and weight: polyanhydride 40kg, glucosamine acetate 22kg, sodium ethylenedienetriaminepentaacetate 5kg, sodium glycolate 6kg, sodium dihexyl sulfosuccinate 10kg, hydroxyl Sodium succinate 12kg, hexamethylenetetramine 5kg, sodium p-hydroxysulfonate 19kg, fatty alcohol polyoxyethylene sodium sulfate 4kg, amino acid sodium 5kg, polyethylene glycol 6kg, ethyl lactate 7kg, tert-butyl hydrogen peroxide Base 3kg, diethylene glycol laurate 0.2kg and water 65kg; The method that above-mentioned raw material is prepared oil field oil recovery water injection system anti-barium strontium scale agent composition is as follows:

[0067] 1, with embodiment 1;

[0068] 2. Add the above-mentioned fatty alcohol polyoxyethylene sodium sulfate, amino acid sodium and 15kg water into the reaction tank, mix and stir for 40 minutes until uniform, and obtain the first mixed liquid;

[0069] 3. Stir polyethylene glycol,...

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Abstract

A barium and strontium scale inhibitor composition for an oil recovery waterflood system of an oilfield is prepared from the following raw materials: 40 to 50 parts of polyanhydride, 20 to 24 parts of glucose ammonium acetate, 3 to 5 parts of diethylenetriam inepentaacetate, 4 to 6 parts of sodium hydroxyacetate, 10 to 13 parts of sodium dihexyl sulfosuccinate, 8 to 12 parts of sodium malate, 5 to 7 parts of hexamethylenetetramine, 16 to 19 parts of sodium phenolsulfonate, 4 to 6 parts of sodium alcohol ether sulphate, 5 to 7 parts of amino acid sodium salt, 4 to 6 parts of polyethylene glycol, 5 to 7 parts of ethyl lactate, 3 to 7 parts of tert-butyl hydroperoxide, 0.1 to 0.3 part of diethylene glycol laurate, and 60 to 70 parts of water. The barium and strontium scale inhibitor has remarkable effects of complexation, low limitation and lattice distortion, and can effectively inhibit the formation of barium sulfate scale and strontium sulfate scale; the barium and strontium scale inhibitor composition provided by the invention contains no phosphorus and is highly biodegradable so as not to accumulate in the environment and cause water pollution; meanwhile, formation damage is reduced, so that the technical difficulties of scaling and corrosion of gathering and transportation systems and oil recovery equipment of the oilfield are solved.

Description

technical field [0001] The invention relates to a barium-strontium scale inhibitor composition for oil production and water injection systems in oil fields, which is used to solve the scaling and anti-corrosion problems of barium and strontium scales in oil production and water injection systems in oil fields. method of preparation. Background technique [0002] First, the current situation of scale prevention in the development of oil production and water injection systems in oilfields [0003] 1. At present, there have been many new developments in the research on scaling damage of oilfields in water injection production at home and abroad, mainly reflected in three aspects, namely, the research on the formation mechanism of scaling damage in oilfields, the development and research of scaling trend prediction technology and anti-scaling countermeasures Research. [0004] 2. Phosphorous corrosion and scale inhibitors, polyacrylic acid and other polymers and copolymers are...

Claims

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Application Information

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IPC IPC(8): C02F5/10
Inventor 赵丽萍刘音希刘志新
Owner GANSU HEIMA PETROCHEM ENG
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