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Polymer viscoelastic injection device and method for performing viscoelastic experiment by using device

A technology for injecting devices and polymers, applied in measurement devices, drilling compositions, chemical instruments and methods, etc., can solve the problems of system error, pressure drop, large space occupied by experimental vessels, etc., to improve the degree of simulation , the effect of reducing workload

Inactive Publication Date: 2015-11-11
NORTHEAST GASOLINEEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, regarding the displacement method of viscous injection, the simulation method adopted in the laboratory experiment is realized by changing the piston container containing different concentrations and viscosities during the displacement process. The number of convertible viscosities is limited, and the experimental container occupies a large space. The connection line of the device is cumbersome, the experimental procedure is complicated, the pressure drop is caused by stopping the pump to change the container, and the pipeline needs to be emptied again when connecting a new container, which causes a certain amount of time wasted, produces a large number of system errors, and greatly reduces the accuracy of the experimental results. Indoor simulated displacement experiments lack a device that can become viscous and inject during the experiment and under the premise of not stopping the pump

Method used

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  • Polymer viscoelastic injection device and method for performing viscoelastic experiment by using device
  • Polymer viscoelastic injection device and method for performing viscoelastic experiment by using device
  • Polymer viscoelastic injection device and method for performing viscoelastic experiment by using device

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Embodiment 1

[0019] Example 1: Gradient Viscosification Experiment Using the Above-mentioned Polymer Viscosity Injection Device

[0020] Experimental conditions: The selected oil is simulated oil with a viscosity of 9.8mPa s prepared from crude oil and kerosene from Daqing Oil Production No. 1 Plant; the saturated water is formation water with a salinity of 6778mg / L; the polymer is ordinary polypropylene produced by Daqing Refining and Chemical Company Amide dry powder, the molecular weight is 12 million, and the viscosity is 20mPa·s, 40mPa·s, 60mPa·s, 80mPa·s in turn when injecting thickener; the injection speed is 0.3ml / min;

[0021] Experimental scheme: water flooding to water cut 98%+0.3PV20mPa s+0.2PV40mPa s+0.18PV60mPa s+0.15PV80mPa s+subsequent water flooding to water cut 98%;

[0022] The specific experimental steps are as follows:

[0023] 1. Prepare a polymer viscous injection device according to the experimental requirements, including a rectangular glass fiber reinforced plast...

Embodiment 2

[0040] Embodiment 2: Utilize the above-mentioned polymer viscous injection device to carry out viscous alternating experiment

[0041] Experimental conditions: The oil used in the embodiment is crude oil and kerosene configured from Daqing Oil Production No. 1 Plant to form simulated oil with a viscosity of 9.8mPa·s; the saturated water is formation water with a salinity of 6778mg / L; the polymer is ordinary oil produced by Daqing Refining and Chemical Company Polyacrylamide dry powder, the molecular weight is 12 million, the viscosity is 20mPa·s, 60mPa·s, 40mPa·s, 80mPa·s in sequence when it becomes viscous and injected; the injection speed is 0.3ml / min;

[0042] Experimental plan: water flooding to water cut 98%+0.3PV20mPa s+0.18PV60mPa s+0.2PV40mPa s+0.15PV80mPa s+subsequent water flooding to water cut 98%;

[0043] The specific experimental steps are as follows:

[0044] 1. According to the experimental requirements, select a low-viscosity viscous injection device;

[004...

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Abstract

The invention relates to a polymer viscoelastic injection device which is used for solving the problems that the viscosity is adjusted by stopping a pump when the existing the viscoelastic experiment is implemented. The polymer viscoelastic injection device comprises a rectangular container and a micrometer head, wherein a clipper simulating structure is arranged inside the rectangular container, and two flat plates are the core parts of the clipper simulating structure, are attached with each other and are respectively provided with through holes at the same position; the micrometer head is used for adjusting one flat plate to move up and down, so that the overflowing area of hole for passing of polymer solution is changed, and thus the polymer solution is clipped according to different degrees, the viscosity of the polymer solution is changed, and the purpose that the viscosity of the polymer can be adjusted without stopping the pump in the experiment process. As the device is adopted to implement the viscoelastic experiment, not only can the indoor experiment workload be reduced, but also the simulation degree of the field experiment can be improved, so that the powerful experiment guaranteeing can be provided for the mine field experiment.

Description

technical field [0001] The invention relates to a polymer viscous injecting device in the field of indoor physical experiment simulation field polymer flooding enhanced oil recovery technology, and a method for using the device to conduct experiments. Background technique [0002] Among oilfield tertiary oil recovery methods, polymer flooding in chemical flooding is a very effective way to enhance oil recovery. Polymer flooding is an tertiary oil recovery technology developed in the middle of the last century. Due to its simple technology and low cost, it is more suitable for the actual situation of most oil fields in my country and has gradually been widely used. The main mechanism of polymer is to reduce the mobility ratio through viscosity change. The viscosity of polymer solution is an important indicator affecting the effect of polymer flooding. In fact, the viscosity of polymer solution is directly related to polymer molecular weight, concentration and shear resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00C09K8/588
Inventor 皮彦夫姜振海刘丽郭晓赛孙红敏赵跃军
Owner NORTHEAST GASOLINEEUM UNIV