Experimental device for researching morphology of oil displacement foam in seepage and migration processes

An experimental device and foam technology, applied in the field of experimental devices for visually studying the migration of foam flooding systems in porous media, can solve the problems of invisible foam structure, complicated seepage migration, and unsatisfactory experimental results, etc. The effect of controlling and changing temperature, convenient customization, and low device cost

Inactive Publication Date: 2016-08-10
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, the percolation and migration of foam systems in porous media is a very complicated process.
Although there are literatures related to the seepage process of foam in porous media, for example, the physical simulation of rock displacement can simulate the pressure and flow characteristics of flowing foam in porous media under high pressure, but the foam structure in the process of foam migration inside the rock formation is invisible. However, the microscopic etching model cannot accurately reflect the characteristics of porous media in real rock formations
In order to study the change of the foam migration law more comprehensively, it is necessary to further study the change of the shape and structure of the foam when it flows in the porous medium from the macroscopic aspect, but the experimental results of the current experimental research device are not ideal enough.

Method used

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  • Experimental device for researching morphology of oil displacement foam in seepage and migration processes
  • Experimental device for researching morphology of oil displacement foam in seepage and migration processes
  • Experimental device for researching morphology of oil displacement foam in seepage and migration processes

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, participate figure 1 with figure 2 , An experimental device used to study the foam seepage migration process morphology for oil flooding, mainly composed of a transparent casing 8 and a piece of sand core 7 assembled to form a transparent model tube device 5 that can observe the macroscopic morphology of the foam seepage migration process, transparent sleeve The tube 8 is made of glass, so that the sand core 7 is set at the set position of the inner cavity of the transparent casing 8, and the inner cavity of the transparent casing 8 is divided into two sections to form a single-layer oil-permeable rock layer simulation system. The sand core 7 adopts A piece of G0 type sand chip, the sand core 7 is a disc shape, the outer shape of the sand core 7 is consistent with the inner cavity shape of the transparent sleeve 8, the outer size of the sand core 7 can be adapted to fix the sand core 7 to the transparent sleeve 8 At the middle position of the inner cavit...

Embodiment 2

[0029] This embodiment is basically the same as the first embodiment, and the special features are:

[0030] In this embodiment, see image 3 In the transparent casing 8, the sand core 7 is composed of 4 G0 type sand chips, and the multiple sand cores 7 are installed in the transparent casing 8 at equal intervals.

[0031] Under the conditions of temperature control at 50℃, atmospheric pressure and 30000 mg / L total salinity, 500ml of the pre-configured 0.5wt.% sodium alpha-olefin sulfonate AOS solution was injected into the water source device 3 as simulated formation water, and then Input into the foam generator 2 through the water pump 4, embed and fix 4 G0 sand chips at a middle distance in the transparent sleeve 8, adjust the water pump 4 to inject the formation water into the foam generator 2 at a flow rate of 6ml / min, and the air-saving source device 1 The gas-liquid volume ratio is adjusted to 2:1, and the migration state of the foam during the whole process is observed and ...

Embodiment 3

[0033] This embodiment is basically the same as the previous embodiment, and the special features are:

[0034] In this example, participate Figure 4 In the transparent casing 8, the sand core 7 is composed of 3 sand chips, respectively G0, G1, and G2 sand chips. The multiple sand cores 7 are installed in the transparent casing 8 at equal intervals.

[0035] Under the conditions of room temperature, normal pressure and 30000 mg / L total salinity, 500ml of the pre-configured compound formula solution with a total concentration of 0.5wt.% is injected as simulated formation water into the water source device 3, and then input through the water pump 4 Into the foam generator 2, the model tube is embedded in the middle distance and fixed with G0, G1, and G2 sand chips in sequence. The water pump 4 is adjusted to inject the formation water into the foam generator 2 at a flow rate of 6ml / min, and the gas flow rate of the air-saving source device 1. , Adjust the gas-liquid volume ratio to ...

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Abstract

The invention discloses an experimental device for researching morphology of oil displacement foam in seepage and migration processes. A transparent casing and a sand core are mainly assembled to form the experimental device which is a transparent model pipe device. The macroscopic morphology of the foam can be observed by the aid of the transparent model pipe device in the seepage and migration processes. The sand core is arranged at a set position of an inner cavity of the transparent casing, the inner cavity of the transparent casing is sectioned to form oil permeation rock stratum simulation systems, the sand core is made of porous media with known average pore diameters, the shape of the outside of the sand core is consistent with that of the inner cavity of the transparent casing, continuous closed cavities are formed in the wall of the transparent casing and are used as temperature-control fluid circulating pipe casing cavities, and the temperatures of experimental media which are fed into the inner cavity of the transparent casing can be regulated and controlled by the temperature-control fluid circulating pipe casing cavities. The experimental device has the advantages that different temperature and salinity conditions can be simulated by the experimental device; the permeability of the porous media can be conveniently changed; phenomena can be directly observed via model pipes; the experimental device is low in economic cost and convenient to assemble; the experimental device is low in economic cost, wide in service condition and convenient to assemble, and macroscopic observational research in the research field can be improved.

Description

technical field [0001] The invention relates to an experimental device for visually studying the foam flooding system, in particular to an experimental device for visually studying the migration law of the foam flooding system in porous media, which is applied to the technical field of chemical flooding for researching tertiary oil recovery technology. Background technique [0002] With the continuous exploitation of oil, most of my country's onshore oil fields have entered the later stage of development, that is, the stage of high water cut. In order to improve oil recovery and increase recoverable reserves, domestic oil fields have generally carried out technical research on tertiary oil recovery, among which foam flooding has gradually become another main EOR technology after polymer flooding technology in eastern China oilfields one. However, the percolation and migration of foam systems in porous media is a very complicated process. Although there are literatures rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 相明辉于洋
Owner SHANGHAI UNIV
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