Method for preparing polysaccharide biogum polymer gel profile control agent

A technology of biological glue and profile control agent, which is applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as adverse effects on environmental construction personnel, and achieve the effects of good strength, lower production costs and less environmental impact.

Inactive Publication Date: 2015-10-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, these two crosslinking agents will have a great adverse effect on the environment and construction personnel

Method used

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  • Method for preparing polysaccharide biogum polymer gel profile control agent
  • Method for preparing polysaccharide biogum polymer gel profile control agent
  • Method for preparing polysaccharide biogum polymer gel profile control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Dissolve xanthan gum in distilled water to form a 0.1% solution, and add 10% 2-acrylamido-2-methylpropanesulfonic acid and 0.16% N,N'- Methylene bisacrylamide, blowing nitrogen to isolate the air, adding potassium persulfate accounting for 0.025% of the mass fraction of the reaction system, and reacting at a constant temperature at 70°C to prepare the profile control agent.

[0026] The profile control agent prepared by this method is soaked in a large amount of distilled water, taken out and dried, then soaked in ethanol, dried and extracted with acetone in a Soxhlet extractor for 24 hours, and the purified polymer profile control agent is obtained after complete drying. The purified and dried polymer profile control agent, xanthan gum, and 2-acrylamido-2-methylpropanesulfonic acid were tested by infrared spectrum, and the infrared spectrum obtained was shown in the attached figure 1 And attached figure 2 shown.

[0027] In the spectrum of the polymer gel profile co...

Embodiment 2

[0029] Dissolve xanthan gum in distilled water to form a 5% solution, add 15% 2-acrylamido-2-methylpropanesulfonic acid and 1% polyethylene glycol disulfonic acid to the solution Acrylic ester, blowing nitrogen gas to isolate the air, adding potassium persulfate accounting for 1% of the mass fraction of the reaction system, and reacting at a constant temperature at a temperature of 70°C to prepare the profile control agent.

[0030] During the test, the viscosity of the gel was measured with an NDJ-8S viscometer, and the temperature and salt resistance properties are shown in the attached image 3 And attached Figure 5 shown.

[0031] attached image 3 Among them, it can be seen from the temperature resistance performance test curve of specific example 2 that the viscosity gradually decreases with the increase of temperature, and its downward trend gradually becomes gentle at 140°C-150°C, and when the ambient temperature reaches 150°C , its viscosity is still 1.04×10 5 mP...

Embodiment 3

[0034] Dissolve xanthan gum in distilled water to form a 2% solution, and add 15% of 2-acrylamido-2-methylpropanesulfonic acid and 1% of N-methylol propanesulfonic acid and 1% of the reaction system to the solution For acrylamide, pass nitrogen gas to isolate the air, add ammonium persulfate accounting for 0.5% of the mass fraction of the reaction system, and react at a constant temperature at a temperature of 80°C to prepare the profile control agent.

[0035] During the test, the viscosity of the gel was measured with an NDJ-8S viscometer, and the temperature and salt resistance properties are shown in the attached image 3 And attached Figure 5 shown.

[0036] attached image 3 Among them, it can be seen from the temperature resistance performance test curve of specific example 3 that its viscosity gradually decreases with the increase of temperature, and its downward trend gradually becomes gentle at 130°C-150°C, and when the ambient temperature reaches 150°C , its vis...

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Abstract

The invention relates to a method for preparing a polysaccharide biogum polymer gel profile control agent. The method includes the steps that polysaccharide biogum is dissolved in distilled water for allocating a solution, a monomer and a cross-linking agent are added into the solution, nitrogen is led in, the air is isolated, then an initiating agent is added, and the profile control agent is obtained through thermostatic reaction. The method for preparing the polysaccharide biogum polymer gel profile control agent has the advantages that the cost of raw materials is low, and the raw materials are wide and capable of being obtained easily; various properties such as gelling time, gelling strength, the mobility after gelling, temperature resistance and salt resistance of the profile control system can be controlled by changing the concentration of the polysaccharide biogum, the monomer, the cross-linking agent and the initiating agent in the reaction system or by changing the type and the initiating system of the cross-linking agent; certain mobility is achieved, the profile control agent can be injected under the shaft easily, and a high permeability layer in the stratum can be effectively plugged; the strength is good, and the method is suitable for oil deposit with the formation temperature being below 150 DEG C; the method is suitable for high-salt oil deposit.

Description

technical field [0001] The invention relates to a preparation method of a polysaccharide bioglue polymer gel profile control agent, which belongs to the field of oil field chemistry. Background technique [0002] In the process of oil drilling and production, water production from oil wells is a common phenomenon in the middle and late stages of oil production. There are many hazards in the oilfield effluent, such as the consumption of formation energy, the reduction of the pump efficiency of the pumping well, the aggravation of the corrosion and scaling of the pipeline equipment, and the increase of the load of the dehydration station. If it is not reinjected, it will have an impact on the environment, the separation and Treatment also increases the cost of oil recovery. With the continuous deepening of oilfield exploitation, conventional water plugging profile control agents can no longer meet the normal production needs of oilfields. Conventional gel profile control agen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/00C08F220/58C09K8/512C09K8/50
Inventor 杨隽徐黎刚闫霜
Owner WUHAN INSTITUTE OF TECHNOLOGY
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