Apparatus and method for evaluating shear resistance of polymer solution

A technology of polymer solution and evaluation device, applied in measurement device, flow characteristics, instrument and other directions, can solve the problems of inability to simulate the shear resistance evaluation of polymer solution, complicated assembly and disassembly process, and large sample volume of polymer solution, etc. Achieve the effect of saving experimental time, low device cost and accurate results

Active Publication Date: 2019-11-22
DAGANG OIL FIELD GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are certain deficiencies in this evaluation device: (1) The experimental device is complicated, the pipeline is too long (3-5m), and the amount of polymer solution sample consumed in the process is too large (more than 2000mL); (2) The assembly and disassembly process of the device is complicated , the experiment time is longer (2-3 days); (3) Since the displacement pump is an advection pump, the polymer solution cannot be directly pumped, but must be pumped through an intermediate container. The evaluation process is not easy to operate, and it is impossible to simulate the polymer solution in oil. Shear resistance evaluation of continuous flow under reservoir conditions; (4) Due to the end face plugging effect at the injection end of the sand-filled pipe core, there may be large deviations in the measurement results

Method used

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  • Apparatus and method for evaluating shear resistance of polymer solution
  • Apparatus and method for evaluating shear resistance of polymer solution
  • Apparatus and method for evaluating shear resistance of polymer solution

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The method of the present invention is used to simulate and evaluate the viscosity retention rate of the polymer solution injected into the formation at a depth of 30 meters under the condition of 30°C.

[0046] A commercially available constant temperature water bath device. The temperature is adjustable from 20 to 80°C, and the temperature control accuracy is ±2°C. Internal height is 200mm.

[0047] One set of commercially available standard precision peristaltic pump, flow range 0.07-16mL / min, pipe joint (outer diameter 10mm), connecting hose (13#, 14#), external control module (0-5V for external signal control peristaltic pump drive revolutions).

[0048]Configure 50mL of a 1500mg / L polyacrylamide (molecular weight: 25 million, hydrolysis degree: 18%) solution, measure the initial viscosity at a temperature of 30°C, and place the solution in a beaker. The initial viscosity is 54.5mPa.s.

[0049] Fill the quartz sand into the sand-filling tube to prepare the core ...

Embodiment 2

[0061] The method of the present invention is used to simulate and evaluate the viscosity retention rate of the polymer solution injected into the formation at a depth of 30 meters under the condition of 80°C.

[0062] Commercially available constant temperature water bath. The temperature is adjustable from 20 to 80°C, and the temperature control accuracy is ±2°C. The internal length is 300mm.

[0063] One set of commercially available standard precision peristaltic pump, flow range 0.07-16mL / min, pipe joint (outer diameter 10mm), connecting hose (13#, 14#), external control module (0-5V for external signal control peristaltic pump drive revolutions).

[0064] Configure 50mL of a 1500mg / L polyacrylamide (molecular weight: 25 million, hydrolysis degree: 18%) solution, measure the initial viscosity at 80°C, and place the solution in a beaker. The initial viscosity is 54.5mPa.s.

[0065] Fill the quartz sand into the sand-filling tube to prepare the core of the sand-filling t...

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Abstract

The invention provides a device and a method for evaluating shearing performance of a polymer solution. The device comprises a sand-filled pipe, a peristaltic pump, a constant temperature water bath apparatus and a container, wherein the sand-filled pipe is arranged in the constant temperature water bath apparatus; the inlet end and the outlet end of the sand-filled pipe are respectively communicated into the container through pipelines; and the peristaltic pump is arranged on a pipeline on which the outlet end of the sand-filled pipe is communicated with the container. According to the device disclosed by the invention, the shearing performance of the polymer solution can be detected and evaluated after core shearing of the sand-filled pipe is performed under different formation velocity conditions. Compared with the general evaluation method, the method disclosed by the invention is accurate in result, and the viscosity number of the sheared polymer solution can be directly obtained. The device provided by the invention is low in cost and accords with the actual field operation. The evaluation method disclosed by the invention is simple in operation, short in process time and high in evaluation result accuracy.

Description

technical field [0001] The invention belongs to the technical field of shear resistance evaluation, and in particular relates to a polymer solution shear resistance evaluation device and method. Background technique [0002] Polymer solution is a kind of chemical agent system mainly used in the tertiary oil recovery process of various oilfields at present. This type of system is to add a certain proportion of polymer dry powder to water, and use the viscoelasticity of the dissolved solution to increase the swept volume to achieve the purpose of enhancing oil recovery. [0003] At present, the commonly used polymer solution shear performance evaluation generally uses sand-packed cores to simulate the formation state, and uses a displacement pump to displace the polymer solution in the intermediate container into the sand-filled core and then evaluates the polymer solution passing through the sand-filled tube. Shear resistance of the core. There are certain deficiencies in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 郭志强葛红江雷齐玲杨卫华程静李佩敬牛伟丽
Owner DAGANG OIL FIELD GRP
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