Indigenous microorganism metabolism aerogenesis foam testing device

Abstract

The utility model relates to the technical field of foam flooding, in particular to a foam performance testing device after endogenous microorganism targeted activation aerogenic bacteria produce gas. The endogenous microorganism metabolism gas production foam testing device comprises a rock core gas generator and a foam stirring generator connected with the rock core gas generator, the rock core gas generator is provided with a liquid injection port; the foam stirring generator is provided with a foam liquid injection port and a foam liquid measuring device; a foam stirrer is arranged in the foam stirring generator; and the rock core gas generator is communicated with the foam stirring generator through a gas channel. The utility model provides an endogenous microorganism metabolism gas production foam testing device, which simulates the action scene of porous medium shearing force and injection pressure difference, a foaming system and endogenous microorganism metabolism gas are combined to foam underground, and the foam performance is evaluated.

Description

Technical Field

[0001] The utility model relates to the technical field of foam flooding, in particular to a foam performance testing device after gas production by endogenous microorganisms targetedly activates gas-producing bacteria. Background Art

[0002] Foam flooding technology has a dual oil recovery mechanism of gas flooding and chemical flooding, and has shown significant effects in improving oil recovery in a large number of engineering practices. At present, the gas media used in foam flooding technology are all manually separated, compressed and transported to the site, and injected by special supporting equipment. It has high economic cost, high pressure and low safety. After more than 20 years of research and practice by industry scientific research and engineering technicians, it is believed that the most important mechanism of endogenous microbial oil recovery is the gas production energy enhancement of microbial metabolism, which means that at the reservoir scale, microbial metabolism can produce a large amount of gas. Based on this background, the utility model simulates the foaming system and endogenous microbial metabolic gas combined with the underground foaming under the action of porous medium shear force and injection pressure difference, and evaluates the foam performance. At present, there is no report on the test device for the evaluation of foam performance under the above concept. The utility model will provide an experimental research basis for the application of biogas foaming technology in low permeability reservoirs. Summary of the Invention

[0003] The utility model aims to solve the above problems and proposes a device for testing gas-producing foam by endogenous microbial metabolism.

[0004] The technical solution of the utility model is:

[0005] A device for testing endogenous microbial metabolic gas production foam comprises a core gas generator and a foam stirring generator connected thereto; the core gas generator is provided with a liquid injection port; the foam stirring generator is provided with a foam liquid injection port and a foam liquid measuring device; the foam stirring generator has a built-in foam stirrer; the core gas generator and the foam stirring generator are connected via a gas channel.

[0006] Wherein, the foam liquid measuring device is a ruler arranged along the vertical direction of the foam stirring generator; and the side wall of the foam liquid measuring device is a visual window.

[0007] Wherein, the liquid injection port is a spraying liquid injection port, and two of them are symmetrically provided.

[0008] Wherein, the foam stirring generator is also provided with a vacuum port.

[0009] Wherein, the side wall of the core gas generator is also provided with a heating device.

[0010] Wherein, the core gas generator is also provided with a pressure gauge and a temperature gauge.

[0011] Wherein, a valve is provided on the gas channel.

[0012] The technical effects of the utility model are:

[0013] The utility model proposes an endogenous microbial metabolic gas production foam testing device, which simulates the underground foaming of the foaming system and the endogenous microbial metabolic gas under the action of porous medium shear force and injection pressure difference, and evaluates the foam performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a device for testing endogenous microbial metabolism and gas-producing foam according to the present invention.

[0015] Figure numerals: 1. pressure gauge; 2. core gas generator; 3. liquid injection port; 4. ruler; 5. vacuum port; 6. foam agitator; 7. foam liquid injection port; 8. foam agitation generator; 9. valve; 10. heating device; 11. thermometer. DETAILED DESCRIPTION

[0016] Example 1

[0017] A device for testing endogenous microbial metabolic gas production foam comprises a core gas generator 2 and a foam stirring generator 8 connected thereto; the core gas generator 2 is provided with a liquid injection port 3; the foam stirring generator 8 is provided with a foam liquid injection port 7 and a foam liquid measuring device; the foam stirring generator 8 has a built-in foam stirrer 6; the core gas generator 2 and the foam stirring generator 8 are connected by a gas channel.

[0018] The specific implementation process of this embodiment is as follows:

[0019] The target layer natural core debris is placed in the core gas generator 2; an endogenous microbial gas-producing bacteria activator is injected into the core gas generator 2 through the foam liquid injection port 7; the gas-producing bacteria in the target layer natural core debris are activated and metabolize to produce gas; during the gas metabolism process, when the pressure in the core gas generator 2 reaches the maximum value and stabilizes, the next step is carried out; the foam stirring generator 8 is evacuated, and the gas metabolized by the microorganisms in the core gas generator 2 is passed into the foam stirring generator 8; after the gas enters the foam stirring generator 8, the gas channel is disconnected; the foam liquid system is added to the foam stirring generator 8 and stirred to produce foam; after the preset stirring time is reached, the foaming volume of the foam liquid and the liquid separation half-life are recorded to evaluate the foam performance.

[0020] Example 2

[0021] On the basis of Example 1, the following further features are included:

[0022] The foam liquid measuring device is a scale 4 arranged vertically along the foam stirring generator 8; the side wall of the foam liquid measuring device is a viewing window. The foaming volume of the foam liquid is measured by the scale 4.

[0023] Example 3

[0024] On the basis of Example 2, the following is also included:

[0025] The liquid injection port 3 is a spraying liquid injection port 3, and two of them are symmetrically arranged. The two symmetrically arranged spraying liquid injection ports 3 can greatly increase the contact area and uniformity between the endogenous microbial gas-producing bacteria activator and the natural core debris of the target layer.

[0026] Example 4

[0027] On the basis of Example 3, the following is also included:

[0028] The foam stirring generator 8 is further provided with a vacuum port 5. The foam stirring generator 8 is vacuumed through the vacuum port 5.

[0029] Example 5

[0030] On the basis of Example 4, the present invention further includes:

[0031] The side wall of the core gas generator 2 is also provided with a heating device 10. The core gas generator 2 is also provided with a pressure gauge 1 and a temperature gauge 11. The heating device 10 can establish a simulated reservoir temperature condition to ensure that microbial metabolism proceeds under different temperature conditions.

[0032] Example 6

[0033] On the basis of embodiment 5, it further includes: a valve 9 is provided on the gas channel.

[0034] The specific implementation process of this embodiment is as follows:

[0035] The target layer natural core debris is placed in the core gas generator 2; an endogenous microbial gas-producing bacteria activator is injected into the core gas generator 2 through two symmetrically arranged foam liquid injection ports 7; the gas-producing bacteria in the target layer natural core debris are waited for to be activated by the endogenous microbial gas-producing bacteria activator and metabolize gas; during the gas metabolism process, the gas pressure in the core gas generator 2 is monitored by a pressure gauge 1; when the gas pressure reaches a maximum and is stable, the foam stirring generator 8 is evacuated through the vacuum port 5, and the gas metabolized by the microorganisms in the core gas generator 2 is passed into the foam stirring generator 8 through the gas channel; after the gas enters the foam stirring generator 8, the gas channel is disconnected through a valve 9; a foam liquid system is added to the foam stirring generator 8 through the foam liquid injection port 7 and stirred to form foam liquid. The gas channel is disconnected to prevent the foam liquid from flowing back into the core gas generator 2; after the preset stirring time is reached, the foaming volume and the liquid separation half-life of the foam liquid are recorded, and then the foam performance is evaluated.

Claims

1. A foam testing device for endogenous microbial metabolism gas production, comprising a core gas generator (2) and a foam stirring generator (8) connected thereto; characterized in that: The core gas generator (2) is provided with a liquid injection port (3); The foam stirring generator (8) is provided with a foam liquid injection port (7) and a foam liquid measuring device; the foam stirring generator (8) has a built-in foam stirrer (6); The core gas generator (2) and the foam stirring generator (8) are connected via a gas channel.

2. The endogenous microbial metabolism gas-producing foam testing device according to claim 1, characterized in that: The foam liquid measuring device is a scale (4) arranged along the vertical direction of the foam stirring generator (8); and the side wall of the foam liquid measuring device is a visual window.

3. The endogenous microbial metabolism gas-producing foam testing device according to claim 2, characterized in that: The liquid injection port (3) is a spray-type liquid injection port (3), and two of them are symmetrically arranged.

4. The endogenous microbial metabolism gas-producing foam testing device according to claim 3, characterized in that: The foam stirring generator (8) is also provided with a vacuum port (5).

5. The endogenous microbial metabolism gas-producing foam testing device according to claim 4, characterized in that: The side wall of the core gas generator (2) is also provided with a heating device (10).

6. The endogenous microbial metabolism gas-producing foam testing device according to claim 5, characterized in that: The core gas generator (2) is also provided with a pressure gauge (1) and a temperature gauge (11).

7. The endogenous microbial metabolism gas-producing foam testing device according to claim 6, characterized in that: The gas channel is provided with a valve (9).

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