Experimental device used to study the morphology of foam seepage migration process for oil displacement

An experimental device and foam technology are applied in the field of experimental devices for visually studying the migration of foam flooding systems in porous media. It can solve the problems of complex seepage migration, invisible foam structure, and inability to accurately reflect porous media. Convenient customization, low device cost, effective control and effect of changing temperature

Inactive Publication Date: 2019-01-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 used to study the morphology of foam seepage migration process for oil displacement
  • Experimental device used to study the morphology of foam seepage migration process for oil displacement
  • Experimental device used to study the morphology of foam seepage migration process for oil displacement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, participating in figure 1 and figure 2 , an experimental device for studying the shape of the foam seepage migration process for oil displacement. It is mainly composed of a transparent casing 8 and a sand core 7 to form a transparent model pipe device 5 that can observe the macroscopic shape of the foam seepage migration process. The 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 seepage rock formation simulation system. The sand core 7 is made of A piece of G0 type sand chip, the sand core 7 is disc-shaped, the external shape of the sand core 7 is consistent with the inner cavity shape of the transparent sleeve 8, and the external size of the sand core 7 can adapt to the fixed installation of the sand core 7 on the transparent sleeve 8 At the midd...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1, especially in that:

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

[0031] Under the conditions of temperature control at 50°C, normal pressure and total salinity of 30000 mg / L, 500ml of 0.5wt.% α-olefin sodium sulfonate AOS solution prepared in advance was injected into the water source device 3 as simulated formation water, and then Input it into the foam generator 2 through the water pump 4, embed and fix 4 pieces of G0 type sand chips at equal distances in the transparent casing 8, adjust the flow rate of the water pump 4 to inject the formation water into the foam generator 2 to be 6ml / min, and the gas-saving source device 1 The gas flow rate was adjusted to adjust the gas-liquid volume ratio to 2:1, and the test was carried out to observe and reco...

Embodiment 3

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

[0034] In this example, participating in Figure 4, in the transparent sleeve 8, the sand core 7 is composed of 3 sand chips, which are G0, G1, and G2 type sand chips respectively, and multiple sand cores 7 are installed in the transparent sleeve 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 into the water source device 3 as simulated formation water, and then input through the water pump 4 Into the foam generator 2, embed and fix G0, G1, G2 type sand chips at equal distances in the model tube, adjust the flow rate of the water pump 4 to inject formation water into the foam generator 2 to 6ml / min, and the gas delivery rate of the gas-saving source device 1 , adjust the gas-liquid volume ratio to 2:...

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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 Patents(China)
IPC IPC(8): G01N13/00
CPCG01N13/00
Inventor 相明辉于洋
Owner SHANGHAI UNIV
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