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Minitype model for simulating oil reservoir and method for conducting petroleum displacement experiment by using minitype model

A technology for displacement experiments and oil simulation, which is used in material analysis by optical means, earthwork drilling, preparation of samples for testing, etc. It can solve problems such as high-cost visualization methods, hindering research and development, and huge experimental equipment. Achieve good visualization performance, simple processing process, and small equipment volume.

Inactive Publication Date: 2018-06-22
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

At present, laboratory research on improving oil recovery usually uses natural and artificial cores for oil displacement experiments, but the inaccessible cores, huge experimental equipment, large reagent consumption, high-cost visualization methods and other factors have hindered relevant research. further development of research

Method used

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  • Minitype model for simulating oil reservoir and method for conducting petroleum displacement experiment by using minitype model
  • Minitype model for simulating oil reservoir and method for conducting petroleum displacement experiment by using minitype model
  • Minitype model for simulating oil reservoir and method for conducting petroleum displacement experiment by using minitype model

Examples

Experimental program
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Embodiment 1

[0028] First, use Matlab software to process the rock formation photos, the rock formation photos and the processed photos are as follows figure 1 shown.

[0029] Use the image processing software Adobe Photoshop and Adobe Illustrator to make the processed photo into a photomask, and use su-8 photoresist to copy the rock formation structure on the surface of the silicon wafer. Choose PDMS as raw material, use molding method to make model structure layer, choose glass sheet as bonding layer, and use oxygen plasma bonding method to complete the bonding of micromodel. Chips that are eventually made into miniature models such as figure 2 , image 3 , Figure 4 As shown, the chip of the miniature model includes a PDMS structure layer 1, a glass bonding layer 2, a rock structure 3, an entrance and exit 4, and an entrance and exit buffer zone 5; the glass bonding layer 2 is set on the PDMS structure layer 1, and the rock structure 3 is set On the glass bonding layer 2 , an inlet...

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Abstract

The invention discloses a minitype model for simulating an oil reservoir and a method for carrying out a petroleum displacement experiment by using the minitype model. A micrograph of a rock of the oil reservoir is processed to obtain an oil reservoir structure picture capable of being edited and copied, preparing a photomask or mould from the oil reservoir structure picture; reproducing the structure of the rock of the oil reservoir on the model through the photomask or mould, bonding, sealing, and preparing the minitype model capable of simulating the structure of the oil reservoir. By injecting different types of crude oil into the model, the condition of oil storage of the oil reservoir is simulated on a certain degree, different oil displacement agents are injected into the model to have the petroleum displacement experiment, the oil displacement effect is observed, and the rock core experiment based substitution of the traditional rock core is realized on a certain degree. The model used in the method accurately copies the structure of the oil reservoir, the processing process is simple, the manufacturing efficiency is high, the processing cost is low, the use level of the experiment agent is low, the experimental period is short, and the size of used equipment is small.

Description

technical field [0001] The invention belongs to the technical fields of microfluidic control technology and enhanced oil recovery, and in particular relates to a miniature model for simulating oil reservoirs and a method for carrying out oil displacement experiments with it. Background technique [0002] Petroleum is the blood of modern industry. Given a certain amount of existing oilfield reserves, any increase in oil recovery rate can bring about a huge increase in production. However, most of the oil will be trapped in the micropores and cracks of the rock formation due to the capillary force and surface tension in the formation. What really has a decisive impact on the oil recovery rate is the fluidity of oil on the microscopic scale. At present, laboratory research on improving oil recovery usually uses natural and artificial cores for oil displacement experiments, but the inaccessible cores, huge experimental equipment, large reagent consumption, high-cost visualizatio...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N21/84E21B43/16
CPCE21B43/16G01N1/28G01N21/84
Inventor 范一强高克鑫张亚军
Owner BEIJING UNIV OF CHEM TECH
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