CN203239304U - Gas well foam drainage indoor simulation test device - Google Patents

Abstract

The utility model discloses an indoor analogue test device of gas well foam drainage belongs to oil gas field development field. The simulation test device in the foam drainage chamber of the gas well comprises a constant temperature box, a simulation shaft arranged in the constant temperature box, a gas inlet unit operable to inject high-temperature and high-pressure gas into the simulation shaft, a liquid inlet unit operable to inject high-temperature and high-pressure liquid into the simulation shaft and a foam receiving unit connected with the simulation shaft; the simulated shaft is provided with a plurality of installation windows, and each installation window is fixed with sapphire glass so as to observe and record the experimental process in the simulated shaft through the sapphire glass; and the sapphire glass can bear high temperature and high pressure, so that a foam drainage experiment of a gas well under high temperature and high pressure can be simulated in the simulated shaft.

Description

Gas well foam drainage indoor simulation test device

technical field

The invention relates to the technical field of oil and gas field development and evaluation, in particular to an indoor simulation test device for gas well foam drainage.

Background technique

Gas well foam drainage technology is to add a foaming agent to the wellbore of the gas well, so that after the foaming agent is mixed with the bottom well fluid, a large amount of low-density foam will be generated under the agitation of the natural gas flow, thereby reducing the relative density of the fluid in the wellbore. The foam containing a large amount of fluid is carried out of the wellbore with the natural gas, and the fluid at the bottom of the well is discharged, so as to increase the production of the gas well.

Chinese Patent Publication No.: CN101539009, provides a directional well foam drainage shaft simulation experiment device, which includes a fixed section simulation cylinder and an adjustable section simulation cylinder, and the fixed section simulation cylinder and the adjustable section simulation cylinder pass through a flexible The connection barrel is sealed. By changing the angle of the simulation cylinder in the fixed section, the well structure of different gas wells can be simulated, which overcomes the shortcomings of Roche altimeter and other test devices that cannot simulate the production status of gas wells. Simulate the wellbore of directional wells in terms of degree and other aspects. However, the simulation cylinder of the fixed section and the simulation cylinder of the adjustable section of the device are both hollow glass tubes, and the insulation outer cylinders of the simulation cylinder of the fixed section and the simulation cylinder of the adjustable section are also hollow glass tubes, which cannot withstand pressure, so The pressure of the wellbore cannot be simulated, resulting in inaccurate test data, and the process of the experiment cannot be observed.

Contents of the invention

In order to solve the problems in the prior art, the embodiment of the present invention provides a gas well foam drainage indoor simulation test device that can simulate the gas well foam drainage experiment under high temperature and high pressure, and can observe the experimental process. The technical solution is as follows:

On the one hand, it provides an indoor simulation test device for foam drainage in a gas well, which includes a thermostatic box, a simulated wellbore placed in the thermostatic box, an air intake unit operable to inject high-temperature and high-pressure gas into the simulated wellbore, A liquid inlet unit operable to inject high-temperature and high-pressure liquid into the simulated wellbore and a foam receiving unit connected to the simulated wellbore; several installation windows are arranged on the simulated wellbore, and each installation window is fixed with Royal blue glass.

Preferably, the end edge of each installation window is provided with an installation groove, and each sapphire glass is embedded in the installation groove of the corresponding installation window.

Preferably, two flanges are fixedly sleeved at each installation window of the simulated wellbore, the first end of each flange is fixed to the simulated wellbore through flange connection, and each flange The inner wall surface of the second end of the second end stops against the end edge of the corresponding sapphire glass.

Preferably, a sealing ring is provided between each sapphire glass and the installation groove of the corresponding installation window.

Preferably, a spotlight is provided on one side of the simulated shaft.

Preferably, a liquid inlet is provided at the bottom of the simulated wellbore, and the liquid inlet unit includes a displacement pump, and a liquid meter is also provided between the displacement pump and the liquid inlet, and the displacement pump A liquid valve is arranged between the replacement pump and the liquid flow meter.

Preferably, an air inlet is provided at the bottom of the simulated wellbore, the air inlet unit includes a high-pressure air pump, and a gas flowmeter is also provided between the high-pressure air pump and the air inlet; An exhaust valve is arranged between the high-pressure air pump and the gas flow meter.

Preferably, a gas-liquid disperser is installed on the bottom of the simulated wellbore, and the air inlet and the liquid inlet are located directly below the gas-liquid disperser.

Preferably, a pressure sensor, a one-way valve and a temperature sensor are further provided between the gas flowmeter and the air inlet; a pressure sensor, a one-way valve and a one-way valve are also arranged between the liquid flowmeter and the liquid inlet valve and temperature sensor.

Preferably, the indoor simulation test device for foam drainage in gas wells further includes a computer, and the thermostatic box, the air inlet unit and the liquid inlet unit are all connected to the computer and controlled by the computer.

The beneficial effects brought by the technical solution provided by the embodiments of the present invention are:

Several sapphire glasses are provided on the simulated wellbore of the indoor simulation test device for gas well foam drainage in the embodiment of the present invention, so that the experimental process in the simulated wellbore can be observed and recorded through sapphire glass; and the sapphire glass can bear high temperature and high pressure, so that the simulated wellbore It can simulate the foam drainage experiment of gas well under high temperature and high pressure.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic diagram of a simulation test device in a gas well foam drainage chamber provided by an embodiment of the present invention, which includes a simulated wellbore;

Fig. 2 is an enlarged view of the installation of the observation window on the simulated wellbore in Fig. 1 .

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Please refer to Fig. 1, the indoor simulation test device for foam drainage of gas wells provided by the embodiment of the present invention includes a constant temperature box 1, a simulated wellbore 3 placed in the constant temperature box 1, and an air inlet operable to inject high-temperature and high-pressure gas into the simulated wellbore 3 Unit 5 , a liquid inlet unit 7 and a foam receiving unit 9 operable to inject high temperature and high pressure liquid into the simulated wellbore 3 . The foam receiving unit 9 is used to collect the foam discharged from the simulated shaft 3 .

A heater (not shown), a temperature sensor 13 and a temperature controller 15 are arranged in the thermostat 1 , and the temperature controller 15 is electrically connected to the heater and the temperature sensor 13 . During the experimental process of simulating foam drainage of gas wells by the indoor simulation test device for foam drainage of gas wells of the present invention, the temperature in the thermostat 1 should be kept constant at a set temperature. When the temperature sensed by the temperature sensor 13 is lower than the set temperature, the temperature controller 15 controls the heater to turn on the heating, thereby keeping the temperature in the thermostat 1 constant.

The simulated wellbore 3 is a cylindrical stainless steel cylinder. Preferably, in this embodiment, the inner diameter of the simulated wellbore 3 is 63.5 mm. The simulated well shaft 3 is provided with several installation windows 30, and a sapphire glass 31 is fixedly installed on each installation window 30, so as to observe and record the experimental process in the simulated well shaft 3 through the sapphire glass 31, and due to the sapphire glass 31 The characteristics of high temperature and high pressure resistance can not only observe and record the experimental process in the simulated wellbore 3, but also simulate the gas well foam drainage experiment under high temperature and high pressure through the simulated wellbore 3.

Specifically, in this embodiment, please refer to FIG. 2 , the end edge of each installation window 30 is provided with an installation groove (not labeled), and each sapphire glass 31 is inlaid in the installation groove of the corresponding installation window 30 Inside. And the upper and lower ends of each installation window 30 of the simulated shaft 3 are fixedly sleeved with a flange 33 , and the inner wall surface at the end edge of each flange 33 stops against the end edge of the corresponding sapphire glass 31 . Preferably, in this embodiment, the first end of each flange 33 is fixed to the simulated wellbore 3 through the flange connection 35, and the inner wall surface of the second end of each flange 33 stops against the corresponding sapphire glass 31 edge, thereby fixing the sapphire glass 31 to the simulated wellbore 3. More preferably, in order to ensure the sealing performance, a sealing ring 37 is further provided between each sapphire glass 31 and the installation groove of the corresponding installation window 30 .

Preferably, in order to observe the experimental process in the simulated wellbore 3 more clearly, a spotlight 2 is provided on one side of the simulated wellbore 3 .

The top of the simulated wellbore 3 is provided with a liquid filling port (not marked), and the bottom of the simulated wellbore 3 is provided with an air inlet (not marked), a liquid outlet 32 and a liquid inlet (not marked). Wherein, the foam discharge agent is injected into the simulated wellbore 3 from the liquid filling port; specifically, in this embodiment, a liquid filling funnel 38 is connected to the liquid filling port, and a liquid filling funnel 38 and the simulated wellbore 3 are passed through The back pressure pipeline (unlabeled) is directly connected to inject the foam discharge agent into the simulated wellbore 3 through the filling funnel 38; preferably, in order to facilitate the control of the injection of the foam discharge agent, a Pneumatic valve 39 is arranged. The air inlet is connected to the air inlet unit 5, so as to add high temperature and high pressure gas into the simulated wellbore 3 through the air inlet unit 5; the liquid inlet is connected to the liquid inlet unit 7, so that the liquid inlet unit 7 can add high temperature gas to the simulated wellbore 3 high pressure liquid. After the experiment is completed, the liquid in the simulated wellbore 3 can be vented and cleaned through the liquid outlet 32 more conveniently. Specifically, in this embodiment, the liquid outlet 32 is also equipped with a drain valve 36 . The height dimension is also engraved on the wall surface of the simulated wellbore 3 .

Please refer to FIG. 1 again, in order to check the temperature of the simulated wellbore 3 at any time, a temperature sensor 34 is provided on the wall of the simulated wellbore 3 .

In order to make the high-temperature and high-pressure gas and high-temperature and high-pressure liquid mix evenly when they enter the simulated wellbore 3, a gas-liquid disperser 4 is installed on the bottom of the simulated wellbore 3, and the air inlet and liquid inlet are located at the front of the gas-liquid disperser 4. Below; in this way, the high-temperature and high-pressure gas and high-temperature and high-pressure liquid entering the simulated wellbore 3 through the air inlet and the liquid inlet respectively enter the gas-liquid disperser 4, and are mixed uniformly through the gas-liquid disperser 4.

Please refer to FIG. 1 , specifically, in this embodiment, the air intake unit 5 includes a high-pressure air pump 51 and a gas flow meter 53 connected to the high-pressure air pump 51 . Preferably, in order to facilitate the control of high-pressure gas, a pressure gauge 52 and an exhaust valve 54 are connected in series between the high-pressure air pump 51 and the gas flow meter 53, so that the high-pressure air pump can be adjusted through the exhaust valve 54 and the gas flow meter 53. 51 The amount of gas discharged into the simulated wellbore 3. More preferably, in order to monitor the high temperature and high pressure gas entering the simulated wellbore 3, a pressure sensor 57, a check valve 58 and a temperature sensor 59 are connected in series between the gas flowmeter 53 and the inlet of the simulated wellbore 3.

Please refer to FIG. 1 , specifically, in this embodiment, the liquid inlet unit 7 includes a displacement pump 71 and a liquid flow meter 72 connected to the displacement pump 71 . Preferably, in order to facilitate liquid control, a liquid valve 73 is provided between the displacement pump 71 and the liquid flow meter 72 . In this way, through the liquid valve 73 and the liquid flowmeter 72, the size of the liquid intake into the simulated wellbore 3 is adjusted, thereby simulating different flow states; For the amount of gas and liquid entering the simulated wellbore 3, the gas-liquid ratio most suitable for the foam drainage gas recovery process is selected. More preferably, in order to monitor the liquid entering the simulated wellbore 3 , a pressure sensor 77 , a one-way valve 78 and a temperature sensor 79 are provided between the liquid flow meter 72 and the liquid inlet of the simulated wellbore 3 .

The foam receiving unit 9 includes a foam collector (not shown in the figure), and the liquid filling port of the simulated wellbore 3 is connected to the foam collector through a connecting pipeline 92 , and an on-off valve 93 is provided on the connecting pipeline. A foam condensation line 921 is also set on the connection line 92 so as to reduce the temperature of the foam discharged from the simulated wellbore 3 .

Please refer to Fig. 1, during the simulation experiment, the gas is pressed into the simulated wellbore 3 by the high-pressure air pump 51; the liquid is pumped into the simulated wellbore 3 by the displacement pump 71; and the gas and liquid enter the simulated wellbore 3 after being mixed by the gas-liquid disperser 4 Inside. Open the pneumatic valve 39, and the foaming agent in the filling funnel 38 falls into the simulated wellbore 3 to impact the bottom hydrostatic surface in the simulated wellbore 3, and the height of the foam generated can be directly observed through the sapphire glass 31, while the simulated wellbore 3 The height dimension on the wall can quantitatively measure the foaming height of the foam release agent. After 3 minutes, observe the foam height in the observation cylinder to obtain the foam stabilization ability of the foam discharge agent. The foam passes through the switch valve 93, the connecting pipeline 91 and the foam condensation pipeline 921 to the foam collector.

In order to realize the automatic control of the experimental process and the accurate collection of experimental data, the simulation test device in the foam drainage chamber of the gas well of the present invention also includes a computer 10, wherein the thermostatic box 1, the simulated shaft 3, the air inlet unit 5 and the liquid inlet unit 7 are all connected with each other. The computer 10 is connected and controlled by the computer 10 . Specifically, in this embodiment, temperature sensor 13, temperature controller 15, pneumatic valve 39, temperature sensor 34, gas flow meter 53, high-pressure air pump 51, exhaust valve 54, pressure sensor 57, one-way valve 58, temperature Sensor 59, liquid flow meter 72, liquid valve 73, pressure sensor 77, one-way valve 78, temperature sensor 79 and switching valve 93 are all connected with computer 10, so that control by computer 10, collect relevant data information and pass computer 10 To calculate the performance of the foam discharge agent.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. gas well foaming water discharge simulation laboratory test device, it is characterized in that, it comprises insulating box, be placed on simulation wellbore hole in the described insulating box, the operationally air admission unit of filling high temperature and high pressure gas, operationally the feed liquor unit of filling high temperature high pressure liquid and the foam receiving element that is connected with described simulation wellbore hole in the described simulation wellbore hole in the described simulation wellbore hole;

Described simulation wellbore hole is provided with several window is installed, and is fixed with royalblue glass on each installation window.

2. gas well foaming water discharge simulation laboratory test device according to claim 1 is characterized in that, each ora terminalis that window is installed is equipped with the installation groove, and each sapphire glass is embedded in the installation groove of corresponding installation window.

3. gas well foaming water discharge simulation laboratory test device according to claim 2, it is characterized in that, each of described simulation wellbore hole is installed the equal fixed cover in window place and is provided with two flange, the logical flange of the first end of each flange is connected and fixed on described simulation wellbore hole, and the internal face backstop of the second end of each flange is in the ora terminalis of the sapphire glass of correspondence.

4. gas well foaming water discharge simulation laboratory test device according to claim 2 is characterized in that,

Be provided with sealing ring between the installation groove of each sapphire glass and corresponding installation window.

5. gas well foaming water discharge simulation laboratory test device according to claim 1 is characterized in that, a side place of described simulation wellbore hole is provided with spotlight.

6. gas well foaming water discharge simulation laboratory test device according to claim 1, it is characterized in that, the bottom of described simulation wellbore hole is provided with inlet, described feed liquor unit comprises the displacement pump, and also be provided with the liquid meter meter between described displacement pump and the described inlet, and be provided with liquid valve between described displacement pump and the described fluid flowmeter.

7. gas well foaming water discharge simulation laboratory test device according to claim 6, it is characterized in that, the bottom of described simulation wellbore hole is provided with air inlet port, and described air admission unit comprises the pressure-air pump, and the gas flowmeter that also is provided with between described connection pressure-air pump and the described air inlet port; Be provided with outlet valve between described pressure-air pump and the described gas flowmeter.

8. gas well foaming water discharge simulation laboratory test device according to claim 7 is characterized in that, the cylinder of described simulation wellbore hole is equipped with the Gas-Liquid Dispersion device on the end, and described air inlet port and described inlet be positioned at described Gas-Liquid Dispersion device under.

9. gas well foaming water discharge simulation laboratory test device according to claim 8 is characterized in that, also is provided with pressure sensor, one way valve and temperature pick up between described gas flowmeter and the described air inlet port; Also be provided with pressure sensor, one way valve and temperature pick up between described fluid flowmeter and the described inlet.

10. gas well foaming water discharge simulation laboratory test device according to claim 1 is characterized in that, also comprises computer, and described insulating box, described air admission unit and described feed liquor unit all be connected with described computer, and is subjected to the control of described computer.