Bio-polysaccharide-based environmentally-friendly oilfield oil recovery composite and application thereof

A compound and environment-friendly technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of low application cost, poor temperature and salt resistance, and high usage of xanthan gum, so as to improve the overall The recovery factor and the effect of improving the displacement efficiency

Active Publication Date: 2018-07-31
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plant polymers represented by guar gum and squash gum are limited by climate, geographical conditions, etc., and their output and performance stability are poor, and their popularization and application are significantly limited; Sugar, curdlan gum and other biopolymers synthesized by microbial metabolism, according to current technical reports, they have different application characteristics in oil field tertiary oil recovery, but they all have their current defects: scleroglucan and Deran gum has good temperature and salt resistance, but its usage is high and its application cost remains high, so it is difficult to popularize; xanthan gum has low application cost but its temperature and salt resistance is not good, so its application is limited; although the usage of Welan gum is low , Good temperature and salt resistance, but due to the limitation of production efficiency, the application cost is also high, so it is difficult to meet the comprehensive needs of oilfield tertiary oil recovery for related auxiliary materials only by relying on a single or two organic compounds of biopolymers

Method used

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  • Bio-polysaccharide-based environmentally-friendly oilfield oil recovery composite and application thereof
  • Bio-polysaccharide-based environmentally-friendly oilfield oil recovery composite and application thereof
  • Bio-polysaccharide-based environmentally-friendly oilfield oil recovery composite and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 A kind of environment-friendly type oil field oil recovery compound based on biopolymer

[0032] The environment-friendly oil field oil recovery compound consists of the following components and mass fractions:

[0033]

[0034] Described scleroglucan molecular weight is 10 5 ~10 6 Da; the molecular weight of the Velan gum is 10 5 ~10 6 Da; The xanthan gum molecular weight is 10 6 ~10 7 Da; the polyacrylamide molecular weight is 10 6 ~10 7 Da; the molecular weight of the curdlan gum is 10 4 ~10 5 Da.

[0035] The preparation method of the environment-friendly oil field oil recovery compound is as follows: respectively weigh 350 g of scleroglucan, 350 g of Welan gum, 50 g of xanthan gum, 70 g of curdlan gum, 20 g of polyacrylamide, 80 g of succinic acid, and sodium sulfite 80g was mixed uniformly to obtain 1000g of an environment-friendly compound for oil recovery based on biopolymers, which was sealed for future use.

Embodiment 2

[0036] Embodiment 2 A kind of environment-friendly type oil field oil recovery compound based on biopolymer

[0037] The environment-friendly oil field oil recovery compound consists of the following components and mass fractions:

[0038]

[0039] Described scleroglucan molecular weight is 10 5 ~10 6 Da; the molecular weight of the Velan gum is 10 5 ~10 6 Da; The xanthan gum molecular weight is 10 6 ~10 7 Da; the polyacrylamide molecular weight is 10 6 ~10 7 Da; the molecular weight of the curdlan gum is 10 4 ~10 5 Da.

[0040] The preparation method of the environment-friendly oil field oil recovery compound is as follows: respectively weigh 500 g of scleroglucan, 200 g of Welan gum, 100 g of xanthan gum, 100 g of curdlan gum, 80 g of polyacrylamide, 10 g of succinic acid, and sodium sulfite 10g was mixed evenly to obtain 1000g of an environment-friendly compound for oil recovery based on biopolymers, which was sealed for future use.

Embodiment 3

[0041] Embodiment 3 A kind of environment-friendly type oil field oil recovery compound based on biopolymer

[0042] The environment-friendly oil field oil recovery compound consists of the following components and mass fractions:

[0043]

[0044] Described scleroglucan molecular weight is 10 5 ~10 6 Da; the molecular weight of the Velan gum is 10 5 ~10 6 Da; The xanthan gum molecular weight is 10 6 ~10 7 Da; the polyacrylamide molecular weight is 10 6 ~10 7 Da; the molecular weight of the curdlan gum is 10 4 ~10 5 Da.

[0045]Weigh 200g of scleroglucan, 200g of Welan gum, 200g of xanthan gum, 150g of curdlan gum, 50g of polyacrylamide, 100g of succinic acid, and 100g of sodium sulfite and mix them evenly to obtain an environmentally friendly Compound 1000g for oil recovery in oil field, sealed for future use.

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Abstract

The invention belongs to the technical field of petroleum exploitation industry, and particularly relates to an oilfield oil recovery composite and application thereof. The environmentally-friendly oilfield oil recovery composite comprises the following components by mass: 20-50% of scleroglucan, 20-40% of welan gum, 5-20% of xanthan gum, 5-15% of curdlan, 0 to 10% of polyacrylamide, 1 to 10% of succinic acid and 1 to 10% of sodium sulfite. The environmentally-friendly oilfield oil recovery composite has outstanding high temperature and salt tolerance characteristics, is an ideal environment-friendly, temperature-resistant and high-salt-resistant oil recovery auxiliary, meets the development and application requirements of the current oil production industry, and has a good application value and prospect.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation industry, and in particular relates to a biological polysaccharide-based compound for oilfield oil recovery and its application. Background technique [0002] At present, many domestic water flooding oil fields have entered the middle and late stages. Due to the heterogeneity of the reservoir and the unfavorable mobility ratio during this period, there is still a large amount of remaining oil in the formation after water flooding, which is generally manifested as high water cut, low production and poor economic benefit of production. At the same time, the demand for oil in the international and domestic markets is increasing year by year. In order to ensure the stable and increased production of oil fields and resolve the contradiction between oil production and market demand, the demand for various oil recovery additives has risen sharply. [0003] In recent years, with the rapid...

Claims

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Application Information

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IPC IPC(8): C09K8/588
CPCC09K8/588
Inventor 张永刚董学前王伟张艳敏刘建军
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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