CN110821455A - Carbon dioxide huff and puff system for oil field - Google Patents
Carbon dioxide huff and puff system for oil field Download PDFInfo
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- CN110821455A CN110821455A CN201911288634.0A CN201911288634A CN110821455A CN 110821455 A CN110821455 A CN 110821455A CN 201911288634 A CN201911288634 A CN 201911288634A CN 110821455 A CN110821455 A CN 110821455A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 276
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 138
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 138
- 238000002347 injection Methods 0.000 claims abstract description 85
- 239000007924 injection Substances 0.000 claims abstract description 85
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 39
- 238000012856 packing Methods 0.000 claims description 32
- 230000007797 corrosion Effects 0.000 claims description 17
- 238000005260 corrosion Methods 0.000 claims description 17
- 229910021392 nanocarbon Inorganic materials 0.000 claims description 16
- 239000003112 inhibitor Substances 0.000 claims description 15
- 238000011084 recovery Methods 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 7
- 210000004907 gland Anatomy 0.000 claims description 5
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 27
- 239000007788 liquid Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/164—Injecting CO2 or carbonated water
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- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a carbon dioxide huff and puff system for an oil field, which belongs to the field of oil extraction equipment, wherein an inlet of the system is communicated with an inlet of a carbon dioxide injection pump through a first pipeline; the first pressure sensing device is arranged on the first pipeline and used for sensing the inlet pressure value of the carbon dioxide injection pump; an inlet of the heating tank is communicated with an outlet of the carbon dioxide injection pump through a second pipeline, and an outlet of the heating tank is communicated with an inlet of the wellhead system; the second pressure sensing device is arranged on the second pipeline and used for sensing the outlet pressure value of the carbon dioxide injection pump; the control unit is respectively in communication connection with the carbon dioxide injection pump, the first pressure sensing device, the second pressure sensing device and the heating tank. The carbon dioxide huff and puff system for the oil field can respectively monitor the inlet pressure value and the outlet pressure value of the carbon dioxide injection pump in real time, once abnormity occurs, the control unit can immediately generate a pump stopping command, overpressure protection measures are provided, and potential safety hazards of the carbon dioxide huff and puff system are reduced.
Description
Technical Field
The invention belongs to the technical field of oil extraction equipment, and particularly relates to a carbon dioxide huff and puff system for an oil field.
Background
The carbon dioxide huff and puff technology is a new oil extraction technology in China, and carbon dioxide is injected into an oil layer, so that the viscosity of crude oil is reduced after the carbon dioxide is fully dissolved in the crude oil, the fluidity of the crude oil is increased, and the volume of the crude oil is expanded, so that the oil yield is improved. At present, a carbon dioxide huff and puff system used in an oil field only directly connects an outlet of a plunger pump for injecting carbon dioxide with an oil extraction wellhead, and an inlet of the plunger pump is directly connected with a carbon dioxide hydraulic tank, so that certain overpressure protection measures are lacked, and potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a carbon dioxide huff and puff system for an oil field, and aims to solve the technical problems that a plunger pump for injecting carbon dioxide in the prior art is lack of overpressure protection measures and has potential safety hazards.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is an oilfield carbon dioxide huff and puff system, comprising:
the system comprises a carbon dioxide injection pump, a first pipeline and a second pipeline, wherein the inlet of the system is communicated with the inlet of the carbon dioxide injection pump through the first pipeline, and the first pipeline is provided with a first valve;
the first pressure sensing device is arranged on the first pipeline and positioned between the first valve and the inlet of the carbon dioxide injection pump, and the first pressure sensing device is used for sensing the pressure value of the inlet of the carbon dioxide injection pump;
an inlet of the heating tank is communicated with an outlet of the carbon dioxide injection pump through a second pipeline, a second valve is arranged on the second pipeline, and an outlet of the heating tank is communicated with an inlet of a wellhead system;
the second pressure sensing device is arranged on the second pipeline and is positioned between the second valve and the outlet of the carbon dioxide injection pump, and the second pressure sensing device is used for sensing the pressure value of the outlet of the carbon dioxide injection pump; and
the control unit is respectively in communication connection with the carbon dioxide injection pump, the first pressure sensing device, the second pressure sensing device and the heating tank;
when the inlet pressure value of the carbon dioxide injection pump is higher than or lower than a first preset range value, the control unit controls the carbon dioxide injection pump to stop pumping; or
And when the outlet pressure value of the carbon dioxide injection pump is greater than a second preset value, the control unit controls the carbon dioxide injection pump to stop pumping.
As another embodiment of the application, the carbon dioxide huff and puff system for the oil field further comprises a corrosion inhibitor injection pump, wherein the corrosion inhibitor injection pump is communicated with the second pipeline through a third pipeline, the third pipeline is connected with the second pipeline at a position between the second valve and an inlet of the heating tank, a valve group is arranged on the third pipeline, and the corrosion inhibitor injection pump is in communication connection with the control unit.
As another embodiment of this application, the carbon dioxide huff and puff system for oil field still includes high-pressure low temperature resistant flowmeter, high-pressure low temperature resistant flowmeter locates on the second pipeline, and is located the second pressure sensing device with between the second valve, high-pressure low temperature resistant flowmeter with the control unit communication is connected.
As another embodiment of the present application, the carbon dioxide injection pump is a plunger pump, and a plunger assembly of the carbon dioxide injection pump includes:
a plunger;
the packing box is sleeved on the periphery of the plunger, and a sealing cavity is formed between the inner wall of the packing box and the outer wall of the plunger;
the guide ring is arranged in the sealing cavity and is positioned at the front end part of the packing box;
the nano carbon sealing ring assembly is arranged in the sealing cavity and is positioned at the rear side of the guide ring;
the low-temperature-resistant packing is arranged in the sealing cavity and is positioned on the rear side of the nano carbon sealing ring assembly; and
and the packing gland is arranged in the sealing cavity and is arranged at the rear side of the low-temperature-resistant packing in a pressing mode.
As another embodiment of the present application, the nanocarbon sealing ring assembly comprises:
the carbon sealing ring is provided with a containing groove with a forward opening; and
and the nano carbon sealing ring is embedded in the accommodating groove.
As another embodiment of the present application, the low temperature resistant packing is a low temperature resistant aramid packing.
As another embodiment of the present application, the carbon dioxide huff and puff system for oil field further includes a carbon dioxide recovery port, the carbon dioxide recovery port is communicated with the second pipeline through a fourth pipeline, a connection position of the second pipeline and the fourth pipeline is located between the second pressure sensing device and the second valve, and a third valve is disposed on the fourth pipeline.
As another embodiment of the present application, the third valve is a multifunctional valve.
As another embodiment of this application, first valve is low temperature resistant stop valve, the second valve is multifunctional valve, the valve group includes:
a high-pressure gate valve; and
and the high-pressure one-way valve is positioned between the high-pressure gate valve and the outlet of the corrosion inhibitor injection pump.
As another embodiment of this application, the carbon dioxide system of taking in and sending out for oil field still includes the sled dress pump house of full open-type, the carbon dioxide injection pump first pressure sensing device the heating tank second pressure sensing device with the control unit all locates in the sled dress pump house.
The carbon dioxide huff and puff system for the oil field provided by the invention has the beneficial effects that: compared with the prior art, the carbon dioxide injection pump stopping system for the oil field is characterized in that the first pressure sensing device is arranged at the inlet of the carbon dioxide injection pump, the second pressure sensing device is arranged at the outlet of the carbon dioxide injection pump, the inlet pressure value and the outlet pressure value of the carbon dioxide injection pump can be monitored in real time respectively, monitoring data are transmitted to the control unit in real time, once the inlet pressure value is higher than or lower than the first preset range value, or the outlet pressure value is larger than the second preset value, the control unit can immediately generate a pump stopping command and send the pump stopping command to the carbon dioxide injection pump, so that the carbon dioxide injection pump can be controlled to stop, effective overpressure protection measures are provided for the carbon dioxide injection pump, and the potential safety hazard of the operation of the carbon dioxide injection pump is reduced to.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the internal structure of an oilfield carbon dioxide huff and puff system provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a control module of an oilfield carbon dioxide huff and puff system provided by an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a plunger assembly used in an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a skid-mounted pump room adopted by the embodiment of the invention;
fig. 5 is an enlarged view of a portion a of fig. 4.
In the figure: 1. a carbon dioxide injection pump; 101. a plunger; 102. a packing box; 103. a guide ring; 104. low temperature resistant packing; 105. packing gland; 106. a carbon sealing ring; 107. a nano carbon sealing ring; 2. a first pressure sensing device; 3. a heating tank; 4. a second pressure sensing device; 5. a control unit; 6. a system inlet; 7. a first conduit; 8. a first valve; 9. a second conduit; 10. a second valve; 11. a wellhead system inlet; 12. a corrosion inhibitor injection pump; 13. a third pipeline; 14. a high pressure low temperature resistant flowmeter; 15. a carbon dioxide recovery port; 16. a fourth conduit; 17. a third valve; 18. a high-pressure gate valve; 19. a high pressure check valve; 20. skid-mounting a pump house; 2001. a pump house body; 2002. a pump room doorway; 2003. a pump room door; 2004. a strut; 2005. a guide rail; 2006. a connecting plate; 2007. a guide wheel; 2008. a limiting plate; 21. pressure gauge
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and 2 together, the carbon dioxide aeration system for oil field according to the present invention will now be described. The carbon dioxide huff and puff system for the oil field comprises a carbon dioxide injection pump 1, a first pressure sensing device 2, a heating tank 3, a second pressure sensing device 4 and a control unit 5; the system inlet 6 is communicated with the inlet of the carbon dioxide injection pump 1 through a first pipeline 7, and a first valve 8 is arranged on the first pipeline 7; the first pressure sensing device 2 is arranged on the first pipeline 7 and is positioned between the first valve 8 and the inlet of the carbon dioxide injection pump 1, and the first pressure sensing device 2 is used for sensing the pressure value of the inlet of the carbon dioxide injection pump 1; an inlet of the heating tank 3 is communicated with an outlet of the carbon dioxide injection pump 1 through a second pipeline 9, a second valve 10 is arranged on the second pipeline 9, and an outlet of the heating tank 3 is communicated with an inlet 11 of a wellhead system; the second pressure sensing device 4 is arranged on the second pipeline 9 and is positioned between the second valve 10 and the outlet of the carbon dioxide injection pump 1, and the second pressure sensing device 4 is used for sensing the outlet pressure value of the carbon dioxide injection pump 1; the control unit 5 is in communication with the carbon dioxide injection pump 1, the first pressure sensing device 2, the second pressure sensing device 4 and the heating tank 3, respectively.
When the inlet pressure value of the carbon dioxide injection pump 1 is higher than or lower than a first preset range value, the control unit 5 controls the carbon dioxide injection pump to stop pumping; or when the outlet pressure value of the carbon dioxide injection pump 1 is greater than the second preset value, the control unit 5 controls the carbon dioxide injection pump 1 to stop pumping.
The control unit 3 inputs a command of heating temperature and heating time in advance, so that the heating tank 3 can heat the carbon dioxide according to the command, and the effectiveness of carbon dioxide handling operation is ensured.
Wherein the system inlet is in communication with a carbon dioxide source. Because the carbon dioxide source is liquid and the temperature is minus 40 ℃, the temperature of the carbon dioxide is improved after the heating tank 3 is heated, the liquid carbon dioxide is prevented from being frozen at a wellhead when meeting water, and the carbon dioxide is ensured to be smoothly injected into the oil production well.
Compared with the prior art, the carbon dioxide huff and puff system for the oil field, provided by the invention, has the advantages that the first pressure sensing device 2 is arranged at the inlet of the carbon dioxide injection pump 1, the second pressure sensing device 4 is arranged at the outlet, the inlet pressure value and the outlet pressure value of the carbon dioxide injection pump 1 can be respectively monitored in real time, the monitoring data are transmitted to the control unit 5 in real time, once the inlet pressure value is higher than or lower than the first preset range value, or the outlet pressure value is larger than the second preset value, the control unit 5 can immediately generate a pump stopping command and send the pump stopping command to the carbon dioxide injection pump 1, the carbon dioxide injection pump 1 can be controlled to stop, effective overpressure protection measures are provided for the carbon dioxide injection pump 1, and the potential safety hazard of the operation of the carbon dioxide huff and puff system is greatly reduced.
Specifically, the first pressure sensing device 2 and the second pressure sensing device 4 are both pressure transmitters, and the pressure transmitters are suitable for measuring the pressure of the pipeline, and are convenient to install and accurate in measurement.
Specifically, the first preset range value is 2MPa-4MPa, the second preset value is set according to actual operation requirements (such as 40MPa), and when the inlet pressure of the system is lower than 2MPa or the outlet pressure of the system is higher than 40MPa, the control unit 5 controls the carbon dioxide injection pump 1 to stop pumping, so that safe production is ensured.
As a specific embodiment of the carbon dioxide huff and puff system for the oil field provided by the present invention, referring to fig. 1 and fig. 2, the carbon dioxide huff and puff system for the oil field further includes a corrosion inhibitor injection pump 12, the corrosion inhibitor injection pump 12 is communicated with the second pipeline 9 through a third pipeline 13, a connection position of the third pipeline 13 and the second pipeline 9 is located between the second valve 10 and an inlet of the heating tank 3, the third pipeline 13 is provided with a valve set, and the corrosion inhibitor injection pump 12 is in communication connection with the control unit 5. As the carbon dioxide source contains other corrosive gases, the carbon dioxide source has certain corrosion effect on a system pipeline and an oil production pipeline, and the corrosion inhibitor and the carbon dioxide are injected into an oil production wellhead after passing through the heating tank 3 together through the corrosion inhibitor injection pump 12. The pipeline of the whole system is protected from corrosion.
Referring to fig. 1 and 2, as a specific implementation manner of the embodiment of the present invention, the carbon dioxide huff and puff system for an oil field further includes a high pressure and low temperature resistant flowmeter 14, the high pressure and low temperature resistant flowmeter 14 is disposed on the second pipeline 9 and is located between the second pressure sensing device 4 and the second valve 10, and the high pressure and low temperature resistant flowmeter 14 is in communication connection with the control unit 5. The high-pressure low-temperature-resistant flowmeter 14 measures the injection amount of the carbon dioxide in real time, so that the injection amount can be adjusted in real time according to the operation requirement. The high-pressure low-temperature-resistant flowmeter can tolerate the high-pressure and low-temperature states of the pipeline, and the normal flow metering function is guaranteed.
Referring to fig. 3, a carbon dioxide injection pump is a plunger pump, and a plunger assembly of the carbon dioxide injection pump 1 includes a plunger 101, a packing box 102, a guide ring 103, a nano carbon seal ring assembly, a low temperature resistant packing 104 and a packing gland 105; the packing box 102 is sleeved on the periphery of the plunger 101, and a sealing cavity is formed between the inner wall of the packing box 102 and the outer wall of the plunger 101; the guide ring 103 is arranged in the sealing cavity and is positioned at the front end part of the packing box 102; the nano carbon sealing ring assembly is arranged in the sealing cavity and is positioned at the rear side of the guide ring 103; the low temperature resistant packing 104 is arranged in the sealing cavity and is positioned at the rear side of the nano carbon sealing ring component; the packing gland 105 is arranged in the sealing cavity and is arranged on the rear side of the low temperature resistant packing 104 in a pressing mode.
The currently used carbon dioxide huff and puff system needs to continuously discharge carbon dioxide gas, but toxic gas contained in the system can cause certain pollution to the environment, cannot meet the requirement of environmental protection, and simultaneously wastes purchased liquid carbon dioxide. Through setting up foretell plunger subassembly, low temperature resistant packing 104 also can keep the state of elastic seal under the low temperature condition, and properties such as nanometer carbon sealing ring subassembly compliance, resilience, low temperature resistance are excellent, have good leakproofness, under the condition of continuous transport liquid carbon dioxide, ensure that whole platform system is zero under normal operating condition and leak, protected the environment, practiced thrift manufacturing cost.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 3, the nano carbon sealing ring assembly includes a carbon sealing ring 106 and a nano carbon sealing ring 107; the carbon sealing ring 106 is provided with a containing groove which is opened forwards, and the nano carbon sealing ring 107 is embedded in the containing groove. The carbon sealing ring 106 is in sealing contact with the packing box 102, the nano carbon sealing ring 107 is in sealing contact with the plunger 101, and the sealing performance of the contact position can be ensured even when the plunger 101 moves.
As a specific implementation of the embodiment of the present invention, the low temperature resistant packing 104 is a low temperature resistant aramid packing. The wear-resistant and low-temperature-resistant rubber has good wear resistance and low-temperature resistance, is low in price and is beneficial to reducing the use cost.
Referring to fig. 1, as a specific implementation manner of the embodiment of the present invention, the carbon dioxide huff and puff system for oil field further includes a carbon dioxide recovery port 15, the carbon dioxide recovery port 15 is communicated with the second pipeline 9 through a fourth pipeline 16, a connection position of the second pipeline 9 and the fourth pipeline 16 is located between the second pressure sensing device 4 and the second valve 10, and a third valve 17 is disposed on the fourth pipeline 16. The unused carbon dioxide is recovered through the carbon dioxide recovery port 15, so that the use cost is saved; in addition, before the carbon dioxide injection pump 1 is started, liquid carbon dioxide is circulated in the carbon dioxide injection pump 1 and the carbon dioxide storage tank, and the carbon dioxide injection pump 1 is started after the temperature reaches the temperature of the liquid carbon dioxide, so that the safety and the production efficiency are improved; the third valve 17 controls the on-off of the fourth pipeline 16 so as to control whether the recovered carbon dioxide enters the system again according to the actual working condition.
As a specific implementation of the embodiment of the present invention, the third valve 17 is a multifunctional valve.
Referring to fig. 1, as a specific implementation manner of the embodiment of the present invention, the first valve 8 is a low temperature resistant stop valve, the second valve 10 is a multifunctional valve, the valve set includes a high pressure gate valve 18 and a high pressure check valve 19, and the high pressure check valve 19 is located between the high pressure gate valve 18 and the outlet of the corrosion inhibitor injection pump 12. The multifunctional valve has multiple control functions, saves the installation difficulty of the valve and reduces the use cost.
Referring to fig. 1, 4 and 5, as a specific implementation manner of the embodiment of the present invention, the carbon dioxide huff and puff system for an oil field further includes a fully open skid-mounted pump house 20, and the carbon dioxide injection pump 1, the first pressure sensing device 2, the heating tank 3, the second pressure sensing device 4 and the control unit 5 are all disposed in the skid-mounted pump house 20. The whole huff and puff system is arranged in a skid-mounted pump room 20, so that the huff and puff system can be conveniently transported and installed in different oil extraction blocks, an inlet and an outlet of the huff and puff system are connected with a field pipeline after the huff and puff system is transported to a field, and the huff and puff system can work after being connected with a power supply.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4 and 5, the skid-mounted pump room 20 includes a pump room body 2001, a pump room door 2002 arranged on a side wall of the pump room body 2001, and a pump room door 2003 movably connected to the pump room body 2001 and used for covering the pump room door, the pump room door 2003 is a door split up and down, and a lock is arranged between two opposite pump room doors 2003. The split pump room door 2003 is convenient to open and close, and occupies a small space.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4, a pump room door is rotatably connected to a pump room body, and a supporting rod 2004 for supporting the pump room door 2003 is disposed on the pump room body 2001. The strut 2004 acts as a brace or lifting to fix the position of the pump room door 2003.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 4 and 5, a guide rail 2005 is disposed on the pump room body 2001, a connection plate 2006 is disposed on the pump room door 2003, a guide wheel 2007 connected with the guide rail 2005 in a rolling manner is disposed on the connection plate 2006, the guide wheel 2007 is rotatably connected with the connection plate 2006, and a limit plate 2008 for supporting the pump room door 2003 is further disposed below the guide rail 2005 on the upper portion of the pump room body 2001. When the pump room door 2003 is opened, the pump room door 2003 positioned above is turned upwards, the pump room door 2003 is pushed in the direction of the pump room body 2001 after being turned to be basically parallel to the ground, and at least one part of the pump room door 2003 can be retracted into the pump room body 2001 under the action of the limiting plate 2008; similarly, the pump room door 2003 positioned below is turned downwards, the pump room door 2003 is pushed in the direction of the pump room body 2001 after being turned to be basically parallel to the ground, the guide rail 2005 can support the pump room door 2003, and at least one part of the pump room door 2003 can be retracted into the pump room body 2001. This structure makes the fixation of the pump room door 2003 after opening more convenient, while saving more external space. In addition, on the basis of this embodiment, the pump room body 2001 may further be provided with a support rod 2004 for supporting the pump room door 2003, so as to further fix the opened pump room door 2003.
Referring to fig. 1, as a specific implementation manner of the embodiment of the present invention, a pressure gauge 21 is further disposed on the second pipe 9, and the pressure gauge is located between a connection position of the third pipe 13 and the second pipe 9 and an inlet of the heating tank 3. The pressure gauge 21 plays a role of displaying the pressure of the second pipe 9 so as to display the pressure of the second pipe 9 near the inlet position of the heating tank 3 in real time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. An oilfield carbon dioxide huff and puff system, comprising:
the system comprises a carbon dioxide injection pump, a first pipeline and a second pipeline, wherein the inlet of the system is communicated with the inlet of the carbon dioxide injection pump through the first pipeline, and the first pipeline is provided with a first valve;
the first pressure sensing device is arranged on the first pipeline and positioned between the first valve and the inlet of the carbon dioxide injection pump, and the first pressure sensing device is used for sensing the pressure value of the inlet of the carbon dioxide injection pump;
an inlet of the heating tank is communicated with an outlet of the carbon dioxide injection pump through a second pipeline, a second valve is arranged on the second pipeline, and an outlet of the heating tank is communicated with an inlet of a wellhead system;
the second pressure sensing device is arranged on the second pipeline and is positioned between the second valve and the outlet of the carbon dioxide injection pump, and the second pressure sensing device is used for sensing the pressure value of the outlet of the carbon dioxide injection pump; and
the control unit is respectively in communication connection with the carbon dioxide injection pump, the first pressure sensing device, the second pressure sensing device and the heating tank;
when the inlet pressure value of the carbon dioxide injection pump is higher than or lower than a first preset range value, the control unit controls the carbon dioxide injection pump to stop pumping; or
And when the outlet pressure value of the carbon dioxide injection pump is greater than a second preset value, the control unit controls the carbon dioxide injection pump to stop pumping.
2. The oilfield carbon dioxide huff and puff system of claim 1, further comprising a corrosion inhibitor injection pump, wherein the corrosion inhibitor injection pump is connected to the second pipeline through a third pipeline, the connection position of the third pipeline and the second pipeline is located between the second valve and the inlet of the heating tank, the third pipeline is provided with a valve set, and the corrosion inhibitor injection pump is connected to the control unit in a communication manner.
3. The oilfield carbon dioxide huff and puff system of claim 1, further comprising a high pressure and low temperature resistant flow meter disposed on the second conduit between the second pressure sensing device and the second valve, wherein the high pressure and low temperature resistant flow meter is in communication with the control unit.
4. The oilfield carbon dioxide throughput system of claim 1, wherein the carbon dioxide injection pump is a plunger pump, and wherein a plunger assembly of the carbon dioxide injection pump comprises:
a plunger;
the packing box is sleeved on the periphery of the plunger, and a sealing cavity is formed between the inner wall of the packing box and the outer wall of the plunger;
the guide ring is arranged in the sealing cavity and is positioned at the front end part of the packing box;
the nano carbon sealing ring assembly is arranged in the sealing cavity and is positioned at the rear side of the guide ring;
the low-temperature-resistant packing is arranged in the sealing cavity and is positioned on the rear side of the nano carbon sealing ring assembly; and
and the packing gland is arranged in the sealing cavity and is arranged at the rear side of the low-temperature-resistant packing in a pressing mode.
5. The oilfield carbon dioxide huff and puff system of claim 4, wherein the nano-carbon seal ring assembly comprises:
the carbon sealing ring is provided with a containing groove with a forward opening; and
and the nano carbon sealing ring is embedded in the accommodating groove.
6. The oilfield carbon dioxide huff and puff system of claim 5, wherein the low temperature resistant packing is a low temperature resistant aramid packing.
7. The oilfield carbon dioxide huff and puff system of claim 1, further comprising a carbon dioxide recovery port, wherein the carbon dioxide recovery port is in communication with the second conduit through a fourth conduit, wherein the second conduit is connected to the fourth conduit at a location between the second pressure sensing device and the second valve, and wherein the fourth conduit is provided with a third valve.
8. The oilfield carbon dioxide throughput system of claim 7, wherein the third valve is a multifunctional valve.
9. The oilfield carbon dioxide huff and puff system of claim 2, wherein the first valve is a low temperature resistant stop valve and the second valve is a multifunctional valve, the valve set comprising:
a high-pressure gate valve; and
and the high-pressure one-way valve is positioned between the high-pressure gate valve and the outlet of the corrosion inhibitor injection pump.
10. The oilfield carbon dioxide huff and puff system of any of claims 1-9, further comprising a fully open skid-mounted pump house, wherein the carbon dioxide injection pump, the first pressure sensing device, the heating tank, the second pressure sensing device, and the control unit are all disposed within the skid-mounted pump house.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911288634.0A CN110821455A (en) | 2019-12-12 | 2019-12-12 | Carbon dioxide huff and puff system for oil field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911288634.0A CN110821455A (en) | 2019-12-12 | 2019-12-12 | Carbon dioxide huff and puff system for oil field |
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| CN110821455A true CN110821455A (en) | 2020-02-21 |
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| CN201911288634.0A Pending CN110821455A (en) | 2019-12-12 | 2019-12-12 | Carbon dioxide huff and puff system for oil field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113969767A (en) * | 2021-12-22 | 2022-01-25 | 德仕能源科技集团股份有限公司 | Device used in low permeability reservoir carbon dioxide huff and puff oil recovery method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203756145U (en) * | 2014-03-08 | 2014-08-06 | 博山水泵制造厂 | Mobile CO2 injection device |
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| CN205778776U (en) * | 2016-04-28 | 2016-12-07 | 中国石油天然气股份有限公司 | CO2 corrosion prevention device for CO2 oil displacement injection well shaft |
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| CN211115940U (en) * | 2019-12-12 | 2020-07-28 | 河北恒盛泵业股份有限公司 | Carbon dioxide huff and puff system for oil field |
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| CN203756145U (en) * | 2014-03-08 | 2014-08-06 | 博山水泵制造厂 | Mobile CO2 injection device |
| CN204371641U (en) * | 2014-11-28 | 2015-06-03 | 中国石油天然气股份有限公司 | sealing device of plunger type reciprocating pump |
| CN205591895U (en) * | 2016-03-18 | 2016-09-21 | 中石化石油工程技术服务有限公司 | Directly annotate formula skid -mounted carbon dioxide and drive injection device |
| CN205778776U (en) * | 2016-04-28 | 2016-12-07 | 中国石油天然气股份有限公司 | CO2 corrosion prevention device for CO2 oil displacement injection well shaft |
| CN106917613A (en) * | 2017-04-24 | 2017-07-04 | 新疆敦华石油技术股份有限公司 | Oilfield liquids carbon dioxide injection device and method for implanting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113969767A (en) * | 2021-12-22 | 2022-01-25 | 德仕能源科技集团股份有限公司 | Device used in low permeability reservoir carbon dioxide huff and puff oil recovery method |
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