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Oil displacement agent based on microbial polysaccharide and application thereof

A technology of microbial polysaccharide and oil displacing agent, applied in the field of microbial polysaccharide-based oil displacing agent

Inactive Publication Date: 2020-10-30
轩凯生物科技(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pantoea exopolysaccharide has excellent properties such as rheology, thickening, thermal stability and fluidity

Method used

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  • Oil displacement agent based on microbial polysaccharide and application thereof
  • Oil displacement agent based on microbial polysaccharide and application thereof
  • Oil displacement agent based on microbial polysaccharide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of oil displacement agent based on microbial polysaccharide.

[0037] (1) Formulation:

[0038] 3% Pantoea polysaccharide fermentation liquid (each 1L fermentation liquid contains 30g pantoea polysaccharide), 5% rhamnolipid, 15% organic acid (fumaric acid and citric acid mass ratio 1:1), 0.5% metal ion ( 20% Fe 2+ +80% Zn 2+ ), and the balance is water. The above are all percentages by mass.

[0039] (2) Preparation method:

[0040] Add surfactant rhamnolipid and organic acid (fumaric acid and citric acid mass ratio 1: 1) to the Pantoea polysaccharide fermentation broth and stir for 1-2 hours, and finally add the remaining water to obtain a novel flooding agent based on microbial polysaccharide fermentation broth. Oil agent, named as No. 1 new oil displacing agent.

Embodiment 2

[0041] Example 2 Preparation of oil displacement agent based on microbial polysaccharide.

[0042] (1) Formulation:

[0043]2% Pantoea polysaccharide fermentation liquid (each 1L fermentation liquid contains 20g pantoea polysaccharide), 1% welan gum, 5% rhamnolipid, 15% organic acid (mass ratio of fumaric acid and citric acid 1:1), 0.5% metal ions (20% Fe 2+ +80% Zn 2+ ), and the balance is water. The above are all percentages by mass.

[0044] (2) Preparation method:

[0045] 1) Adding 1 times the volume of water to the pantoea polysaccharide fermentation liquid, stirring for 1-2 hours, to obtain a pantoea polysaccharide solution with a viscosity in the range of 300-400mPa.s;

[0046] 2) preparing Welan gum into an aqueous solution with a mass concentration of 1%, and stirring for 1-2 hours to obtain a Welan gum solution;

[0047] 3) adding the pantoea polysaccharide solution in 1) to the welan gum solution in 2) to obtain a microbial polysaccharide solution;

[0048] ...

Embodiment 3

[0049] Example 3 Preparation of oil displacement agent based on microbial polysaccharide.

[0050] (1) Formulation:

[0051] 2% pantoea polysaccharide fermentation broth (each 1L fermentation broth contains 20g pantoea polysaccharide), 1% xanthan gum, 5% rhamnolipid, 15% organic acid (mass ratio of fumaric acid and citric acid 1:1), 0.5% metal ions (20% Fe 2+ +80% Zn 2+ ), and the balance is water. The above are all percentages by mass.

[0052] (2) Preparation method:

[0053] 1) Add 1 times the volume of water to the pantoea polysaccharide fermentation liquid, stir for 1-2 hours, and obtain the pantoea polysaccharide solution;

[0054] 2) preparing welan gum into an aqueous solution with a concentration of 1%, and stirring for 1-2 hours to obtain a xanthan gum solution;

[0055] 3) adding the pantoea polysaccharide solution in 1) to the xanthan gum solution in 2) to obtain a microbial polysaccharide solution;

[0056] 4) Add surfactant and organic acid to the microbia...

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Abstract

The invention discloses an oil displacement agent based on microbial polysaccharide. The oil displacement agent comprises the following components in percentage by mass: 1%-30% of microbial polysaccharide, 5%-20% of a surfactant, 10%-30% of organic acid and 0.1%-5% of metal ions, with the balance of water, wherein the microbial polysaccharide is prepared from the following components in percentageby weight: 50 to 100% of pantoea polysaccharide, 0 to 50% of welan gum and 0 to 50% of xanthan gum. According to the invention, the viscosity of the oil displacement agent prepared by compounding themicrobial polysaccharide, the surfactant, the organic acid, the metal ions and the water can still be maintained at 300-400 mPa.s at 140 DEG C; and the prepared oil displacement agent can remarkablyimprove the displacement efficiency of an oil-displacing fluid and reduce a water-oil fluidity ratio, so the overall recovery ratio of in-place oil of crude oil is improved, and the oil displacement agent is a novel efficient oil displacement agent.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to an oil displacement agent based on microbial polysaccharide and application thereof. Background technique [0002] In recent years, with the development of the economy, in order to meet the demand for energy, especially oil, tertiary oil recovery technology has emerged as the times require. my country's tertiary oil recovery technology mainly has four major technologies, namely gas miscible flooding, thermal oil recovery, chemical flooding and microbial oil recovery technology. Among them, the most widely used is the polymer driving technology in chemical flooding, which mainly uses partially hydrolyzed polyacrylamide (HPAM) as the oil displacement agent. Under acidic and slightly alkaline conditions, reactions such as hydrolysis and degradation will occur, resulting in a significant decrease in the viscosity of the polymer solution, affecting the over...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/588E21B43/22C12P19/04C12R1/01
CPCC09K8/584C09K8/588C12P19/04E21B43/16
Inventor 梁金丰王延斌詹伊婧
Owner 轩凯生物科技(山东)有限公司
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