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Xanthan gum-based profile control agent for oil exploitation and preparation method thereof, and application of xanthan gum-based profile control agent for oil exploitation

A technology of xanthan gum and profile control agent, which is applied in the fields of production fluids, chemical instruments and methods, earthwork drilling, etc., can solve the problems of deep reservoir formation, reduced application effect, and high temperature, and achieves good profile control effect and high temperature. Stability, low dosage effect

Active Publication Date: 2020-03-31
SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid development of my country's economy and the strengthening of environmental protection policies, the research and practice of biopolymers represented by xanthan gum in oil recovery are increasing rapidly, but the geological conditions of my country's oil reservoirs are extremely complex , the oil reservoir has deep strata, high temperature and high salinity, and after decades of continuous development, the proportion of easy-to-exploitation has dropped sharply
Xanthan gum has stable production capacity and low price among biopolymers, but its application effect is significantly reduced under high temperature (>70°C) and high salt (>50,000ppm) conditions due to the physical and chemical properties of the molecule itself

Method used

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  • Xanthan gum-based profile control agent for oil exploitation and preparation method thereof, and application of xanthan gum-based profile control agent for oil exploitation
  • Xanthan gum-based profile control agent for oil exploitation and preparation method thereof, and application of xanthan gum-based profile control agent for oil exploitation
  • Xanthan gum-based profile control agent for oil exploitation and preparation method thereof, and application of xanthan gum-based profile control agent for oil exploitation

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Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A kind of improved environment-friendly oilfield profile control agent

[0031] The xanthan gum-based environment-friendly high-temperature-resistant and salt-resistant oil recovery additive for oilfields consists of the following components and parts by mass:

[0032] 72 parts of xanthan gum;

[0033] 23 parts of guar gum;

[0034] 1.5 parts of succinic acid;

[0035] 3.5 parts of sodium sulfite.

[0036] The preparation method of the xanthan gum-based environment-friendly high-temperature-resistant and salt-resistant oilfield oil recovery additive is as follows: after weighing 720g of xanthan gum, 230g of guar gum, 15g of succinic acid, and 35g of sodium sulfite and fully mixing them uniformly, the product based on 1000g of oilfield oil recovery additive of biopolymer, sealed up for future use.

Embodiment 2

[0037] Embodiment 2 A kind of improved environment-friendly oilfield profile control agent

[0038] The xanthan gum-based environment-friendly high-temperature-resistant and salt-resistant oil recovery additive for oilfields consists of the following components and parts by mass:

[0039] 50 parts of xanthan gum;

[0040] 42 parts of guar gum;

[0041] 3 parts of adipic acid;

[0042] Sodium sulfite 5 parts.

[0043] The preparation method of the xanthan gum-based environment-friendly high temperature-resistant and salt-resistant oilfield oil recovery additive is as follows: after weighing 500g of xanthan gum, 420g of guar gum, 30g of adipic acid, and 50g of sodium sulfite, and fully mixing them uniformly, the product based on 1000g of oilfield oil recovery additive of biopolymer, sealed up for future use.

Embodiment 3

[0044] Embodiment 3 A kind of improved environment-friendly oilfield profile control agent

[0045] The improved environmental protection oilfield profile control agent consists of the following components and parts by mass:

[0046] 90 parts of xanthan gum;

[0047] 5.0 parts of guar gum;

[0048] 1.0 parts of succinic acid;

[0049] 4.0 parts of sodium sulfite.

[0050] The preparation method of the environment-friendly high temperature-resistant and salt-resistant oilfield oil production aid based on xanthan gum is as follows: after weighing 900g of xanthan gum, 50g of guar gum, 10g of succinic acid, and 40g of sodium sulfite, and fully mixing them uniformly, the product based on 1000g of oilfield oil recovery additive of biopolymer, sealed up for future use.

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Abstract

The invention relates to a xanthan gum-based profile control agent for oil exploitation and a preparation method thereof, and application of a xanthan gum-based profile control agent for oil exploitation. The xanthan gum-based profile control agent is prepared from the following raw materials in parts by weight: 50-90 parts of xanthan gum, 5-45 parts of guar gum, 1-3 parts of binary acid and 1-5 parts of sodium sulfite. The temperature resistance of the profile control agent is up to 110 DEG C, and the salt resistance of the profile control agent is up to 100,000 ppm. The profile control agenthas long-term stability in a high-temperature state as an oil extraction aid, and the average viscosity loss rate is 20% or below after 6 months under the condition of the temperature of 100 DEG C.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a profile control agent for petroleum exploitation based on xanthan gum and its preparation method and application. Background technique [0002] The information in the background technology section of the present invention disclosure is only intended to increase the understanding of the general background of the present invention, and is not necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art known to those skilled in the art. [0003] In recent years, oilfields have been continuously exploited for many years, and many water flooding oilfields 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 manifest...

Claims

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Application Information

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IPC IPC(8): C09K8/514E21B43/22
CPCC09K8/514E21B43/16
Inventor 董学前张永刚王伟
Owner SHANDONG FOOD & FERMENT IND RES & DESIGN INST
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