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Biochemical anti-salt anti-high temperature oil displacement viscosity reducer and preparation method thereof

A technology of high temperature resistance and viscosity reducing agent, applied in the field of oil displacement viscosity reducing agent, can solve problems such as difficulties and immature technology, achieve convenient construction, improve crude oil recovery, high temperature resistance and salinity resistance. Effect

Active Publication Date: 2014-03-05
DALIAN OPUS BIOENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology improves upon current methods by providing specific ranges of temperatures that prevent damage from freezing or sticking together during storage periods. Additionally, this new method allows for more efficient use of space while maintaining consistently low levels of salt concentration within each sample. Overall, these technical improvements enhance the performance of various types of chemical agents used in exploration operations like drilling fluids.

Problems solved by technology

This patents discusses how current methods involve adding expensive specialty agents (such as quaternaries) onto drilling fluids containing heavy oils called bitumen, causing issues due to changes caused by environmental factors including temperatures and salininess levels. Current solutions require multiple steps before reaching optimal results, leading to delayed response times and poor efficiency.

Method used

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  • Biochemical anti-salt anti-high temperature oil displacement viscosity reducer and preparation method thereof
  • Biochemical anti-salt anti-high temperature oil displacement viscosity reducer and preparation method thereof
  • Biochemical anti-salt anti-high temperature oil displacement viscosity reducer and preparation method thereof

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Effect test

Embodiment 1

[0038] A preparation method of a biochemical anti-salt and anti-high temperature oil displacement viscosity reducer, the preparation method comprises the following steps:

[0039] ① Inoculate Pseudomonas aeruginosa ATCC NO.9027 on a solid medium and culture at 37°C for 1 day. The solid medium is agar powder 20g / L, glucose 10g / L, NH 4 Cl2g / L, K 2 HPO 4 3.5g / L, KH 2 PO 4 0.5g / L, MgSO 4 ·7H 2 O0.2g / L, FeSO 4 ·7H 2 O0.1g / L, add water to 1L, pH is 7;

[0040] ②Transfer the single colony of the solid medium obtained in step ① into the seed medium, and shake and culture at 150rpm at 37°C for 2 days to obtain the seed liquid. The seed medium is glucose 10g / L, NH 4 Cl2g / L, K 2 HPO 4 12H 2 O3.5g / L, KH 2 PO 4 0.5g / L, KCl0.5g / L, MgSO 4 ·7H 2 O0.2g / L, FeSO 4 ·7H 2 O0.1g / L, add water to 1L, pH is 7;

[0041] ③Add the seed liquid obtained in step ② into the fermentation medium, and cultivate it at 37°C for 4 days to obtain a microbial fermentation liquid, the glucose 12g / L,...

Embodiment 2

[0045] A preparation method of a biochemical anti-salt and anti-high temperature oil displacement viscosity reducer, the preparation method comprises the following steps:

[0046] ① Inoculate Bacillus subtilis ATCC NO.21332 on a solid medium and culture at 37°C for 1 day. The solid medium is agar powder 20g / L, glucose 10g / L, NH 4 Cl2g / L, K 2 HPO 4 3.5g / L, KH 2 PO 4 0.5g / L, MgSO 4 ·7H 2 O0.2g / L, FeSO 4 ·7H 2 O0.1g / L, add water to 1L, pH is 7;

[0047] ②Transfer the single colony of the solid medium obtained in step ① into the seed medium, and culture it with shaking at 150rpm for 2 days at 37°C to obtain the seed liquid. The seed medium is glucose 12g / L, NH 4 Cl1.5g / L, K 2 HPO 4 12H 2 O3.5g / L, KH 2 PO 4 0.5g / L, KCl0.5g / L, MgSO 4 ·7H 2 O0.2g / L, FeSO 4 ·7H 2 O0.2g / L, add water to 1L, pH is 7.5;

[0048] ③Add the seed liquid obtained in step ② into the fermentation medium, and cultivate it at 37°C for 4 days to obtain a microbial fermentation liquid, the glucose ...

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Abstract

The invention relates to a viscosity reducer, and particularly relates to a biochemical anti-salt anti-high temperature oil displacement viscosity reducer and a preparation method thereof. The anti-salt anti-high temperature oil displacement viscosity reducer comprises the following components in percentage by mass: 30-85% of microbial fermentation liquid, 0.5-5% of anionic surfactant, 0.5-10% of nonionic surfactant and the balance of distilled water, wherein the microbial fermentation liquid is microbial strain fermentation liquid for producing glycolipid or lipopeptide biosurfactant. Compared with the existing viscosity reducer, the viscosity reducer provided by the invention has the beneficial effects of high-temperature resistance, hypersalinity resistance, efficient reduction of oil-water interfacial tension and wettability improvement; under the same conditions, the viscosity reducing effect is improved by 10% over the existing viscosity reducer, and the viscosity reducing effect on medium-viscosity thick oil is 99%; the viscosity reducer provided by the invention is safe and environment-friendly and realizes a stable effect as well as double abilities of viscosity reduction and oil displacement.

Description

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Claims

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Application Information

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Owner DALIAN OPUS BIOENG
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