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Composite multiple dirt dispersion agent for oilfield flooding treatment and preparation method thereof

A scale inhibitor and dispersant, multi-technology, applied in water/sludge/sewage treatment, chemical instruments and methods, scale removal and water softening, etc. To solve the problem of single scale effect, it can achieve the effect of high-efficiency silica scale deposition, preventing silica scale deposition, and good scale inhibition and dispersion performance.

Active Publication Date: 2011-08-31
SHANGHAI MEIJING ENVIRONMENTAL PROTECTION MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are many kinds of scale inhibitors in the market, there are still some problems in the following aspects: (1) The scale inhibition effect of scale inhibitors is not ideal
There is a big difference between oilfield sewage and circulating cooling water. The concentration of metal ions contained in oilfield sewage is much higher than that in circulating cooling water, so many inhibitors have poor antiscaling effect on them.
(2) For barium sulfate and strontium sulfate scale in oilfield sewage, many scale inhibitors have poor scale inhibition effect
(3) For the colloidal silica scale in oilfield sewage, such as silica and silicate scale, the existing four types of scale inhibitors have no effect on it. (4) The scale inhibition effect is single and can only be used for One or two of the several scales in the oil field are effective, and the scope of application is narrow. At the same time, there are not many scale inhibitors that have good scale inhibition effect on all the scales in the oil field sewage.
(4) Many scale inhibitors have high phosphorus content or biodegradability, which will cause certain pollution to the environment

Method used

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  • Composite multiple dirt dispersion agent for oilfield flooding treatment and preparation method thereof
  • Composite multiple dirt dispersion agent for oilfield flooding treatment and preparation method thereof
  • Composite multiple dirt dispersion agent for oilfield flooding treatment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Preparation of composite multi-element scale inhibitor and dispersant

[0044] Prepare 100.00g of composite multi-component antiscaling and dispersing agent: mix 10.00g of polymaleic acid (HPMA) with a solid content of 48% and 7.00g of water and stir evenly, then add 30.00g of polyepoxysuccinic acid with a solid content of 40% Sodium (PESA) polyepoxysuccinic acid, stirred for 30 minutes, then added 9.00 g of hexapotassium hexamethylenediaminetetramethylphosphate (HTDMP) with a solid content of 35%, and stirred for another 30 minutes to obtain Agent A. Mix 6.00g of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) with a solid content of 50% and 7.00g of water and stir evenly, then add 22.00g of polyaspartate with a solid content of 40% Acid sodium (PASP), stirred for 30 minutes, then added 9.00 g of polyamidoamine (PAMAM) with hexamethylenediamine as the core, and stirred for another 30 minutes to obtain agent B. Mix agent A and agent B and stir for 30 minut...

Embodiment 2

[0048] Example 2: Preparation of composite multi-element scale inhibitor dispersant

[0049] Prepare 100.00g of composite multi-component antiscaling and dispersing agent: mix 6.00g of polymaleic acid (HPMA) with a solid content of 48% and 6.00g of water and stir evenly, then add 20.00g of polyepoxysuccinic acid with a solid content of 40% Sodium (PESA) polyepoxysuccinic acid, stirred for 30 minutes, then added 14.00 g of hexapotassium hexamethylenediaminetetramethylphosphate (HTDMP) with a solid content of 35%, and stirred for another 30 minutes to obtain Agent A. Mix 3.00g of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) with a solid content of 50% and 6.00g of water and stir evenly, then add 37.00g of polyaspartate with a solid content of 40% Acid sodium (PASP), stirred for 30 minutes, then added 8.00 g of polyamidoamine (PAMAM) with hexamethylenediamine as the core, and stirred for another 30 minutes to obtain B agent. Mix agent A and agent B and stir for 30 minutes ...

Embodiment 3

[0053] Example 3: Preparation of composite multi-element scale inhibitor dispersant

[0054] Prepare 100.00g of composite multi-component antiscaling and dispersing agent: mix 20.00g of polymaleic acid (HPMA) with a solid content of 48% and 9.90g of water and stir evenly, then add 16.30g of polyepoxysuccinic acid with a solid content of 40% Sodium (PESA) polyepoxysuccinic acid, stirred for 30 minutes, then added 8.80 g of hexapotassium hexamethylenediaminetetramethylphosphate (HTDMP) with a solid content of 35%, and stirred for another 30 minutes to obtain Agent A. Mix 10.00g of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) with a solid content of 50% and 10.00g of water and stir evenly, then add 15.00g of polyaspartate with a solid content of 40% Acid sodium (PASP), stirred for 30 minutes, then added 10.00 g of polyamidoamine (PAMAM) with hexamethylenediamine as the core, and stirred for another 30 minutes to obtain B agent. Mix agent A and agent B and stir for 30 minut...

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Abstract

The invention belongs to the technical field of oilfield flooding treatment, and particularly relates to a composite multiple dirt dispersion agent for oilfield flooding treatment and a preparation method thereof. The composite multiple dirt dispersion agent is composed of polyepoxysuccinic acid sodium, polyaspartic acid sodium, polymaleic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, hexamethylenediamine tetra(methylene phosphonic acid) hexapotassium salt and polyamidoamine using hexamethylene diamine as the core. The composite multiple dirt dispersion agent has the characteristics of less consumption and wide range of application, can effectively prevent deposition of calcium carbonate, calcium sulfate, barium sulfate and silicate of an oilfield flooding system, and is applicable to the oilfield flooding system under conditions of high temperature, hypersalinity and high alkalinity as well as the oilfield flooding system under the conditions of high temperature, hypersalinity and high acidity.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to a water treatment scale inhibitor dispersant used in an oilfield water injection system and a preparation method thereof, in particular to a composite multi-element oilfield water injection treatment scale inhibitor dispersant and a preparation method thereof. Background technique [0002] With the rapid development of the economy, oil production has become an important industry related to the lifeline of the national economy. At present, most of my country's oil fields are in the middle and late stage of development, and water injection development has become a main way to enhance oil recovery. Some oil fields have reached the stage of tertiary oil recovery, and the amount of water injection is increasing. With the increase of water injection, the water content of crude oil continues to rise, and the amount of oily sewage is increasing. The dischar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
Inventor 杨军邓长莉王君
Owner SHANGHAI MEIJING ENVIRONMENTAL PROTECTION MATERIALS
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