CA2822235A1 - Gas-type combined thermal carrier generation system - Google Patents
Gas-type combined thermal carrier generation system Download PDFInfo
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- CA2822235A1 CA2822235A1 CA2822235A CA2822235A CA2822235A1 CA 2822235 A1 CA2822235 A1 CA 2822235A1 CA 2822235 A CA2822235 A CA 2822235A CA 2822235 A CA2822235 A CA 2822235A CA 2822235 A1 CA2822235 A1 CA 2822235A1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims description 32
- 239000000498 cooling water Substances 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 91
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 14
- 238000011084 recovery Methods 0.000 abstract description 11
- 239000000446 fuel Substances 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000003345 natural gas Substances 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 16
- 238000000034 method Methods 0.000 description 11
- 239000001569 carbon dioxide Substances 0.000 description 8
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 241000191291 Abies alba Species 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 238000010420 art technique Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Feeding And Controlling Fuel (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention relates to a gas-type combined thermal carrier generation system, which it comprises combined thermal carrier generator, air pipeline, gas pipeline, and water pipeline. An input end of the combined thermal carrier generator is connected with the air pipeline, gas pipeline and water pipeline, respectively, and an output end of the combined thermal carrier generator is connected with oil formation through a combined thermal carrier delivery pipework. The combined thermal carrier delivery pipework comprises a thermal carrier pressure transmitter, output temperature transmitter, first output safety valve, first electric blowoff valve, output check valve, and output stop valve connected one another in order. The gas-type combined thermal carrier generation system of the present invention applies the natural gas or associated gas as fuel generated along with the oil production in oil reservoir, it can effectively reduce the running cost and realize carbon natural by reducing its emissions to zero as well as energy saving and emission reduction if oil reservoirs are available with these conditions in the light of technology used to enhance the oil recovery and single-well productivity with gas-type combined thermal carrier comprehensive application.
Description
Gas-type combined thermal carrier generation system Field of the invention The present invention relates generally to an area of oil recovery technology, and more specifically to a gas-type combined thermal carrier generation system.
Background of the invention Injecting saturated steam into oil formation for heavy oil extraction is one of the extensively applied methods worldwide. At present, injecting carbon dioxide and nitrogen individually into oil formation become a significant breakthrough in terms of new technology application for high crude oil production and enhanced oil recovery at various countries all over the world, which have shown their effects on oil production and economic benefits.
The combined thermal carrier containing high temperature nitrogen, carbon dioxide, water vapor as well as combustion heat carried is generated under the condition of closed burning environment with the help of both high temperature and high pressure combined thermal carrier generator. In the combined thermal carrier, carbon dioxide can play a role to dissolve crude oil while nitrogen plays a role of elastically flooding for crude oil, and steam plays a thermal role for crude oil. The combined thermal carrier is all injected through thermal injection pipeline into oil formation so as to enhance oil recovery and single-well productivity. Once injection is in process, it is required to adjust the combined thermal carrier based on injection parameters in terms of its temperature, flow rate and total amount of carrier injected thereby increasing the enhanced oil recovery and single-well productivity. Meanwhile, reliable control for temperature, pressure, and flow rate of the combined thermal carrier becomes a reliable technology for effectively compensating stratum energy for oilfields with low permeability.
At present, the combined thermal carrier generator operates relying generally on diesel as main fuel. Though it has shown excellent cost performance in terms of enhanced oil recovery and comprehensive benefits in comparison to conventional oil recovery techniques, diesel as fuel is still costly. If natural gas supply is available in the oil reservoir, the cost of natural gas is obviously lower than that of diesel. In such an oil reservoir most of associated gas is directly exhausted by either discharging it into air or burning it out, such that it wastes useful fuel material and pollutes the environment as well.
Therefore, by considering to lower the running cost using natural/associated gases as fuel, if natural gas or associated gas is available or provided in oil reservoir area the gas-type combined thermal carrier generator using these gases as burning gas can reduce production cost with the combined thermal carrier.
Summary of the invention In order to overcome the shortcomings mentioned above, it is an object of the present invention to provide a gas-type combined thermal carrier generation system in which the natural gas or associated gas as fuel generated along with the oil production in oil reservoir, it can effectively reduce running cost and realize carbon natural by reducing its emissions to zero as well as energy saving and emission reduction if oil reservoirs are available with these conditions mentioned above in the light of technology used to enhance the oil recovery and single-well productivity with gas-type combined thermal carrier comprehensive application.
The objective of the present invention is realized in such a way that it applies a gas-type combined thermal carrier generation system, which it comprises a combined thermal carrier generator, air pipeline, fuel pipeline and water pipeline, and an input end of the gas-type combined thermal carrier generator is connected with the air pipeline, gas pipeline and water pipeline, respectively.
An air regulating valve, an air mass flow meter, an air pressure transmitter, and an air check valve are successively arranged on the air pipeline. A first gas pressure transmitter, a gas stop valve, a gas constant temperature control system, a gas flow regulating valve, a gas mass flow meter, a second gas stop valve, a second gas pressure transmitter, and a gas check valve are successively arranged on the gas pipeline. The gas flow regulating valve is connected in parallel with a gas compensation regulating valve. A feed water control valve, a high frequency pressure varying pump, a first water pressure transmitter, a water filter, a water mass flow meter, a second water pressure transmitter, and a water check valve are successively arranged on the water pipeline. An output end of the combined thermal carrier generator is connected with oil formation through a delivery pipework of the combined thermal carrier. The delivery pipework of the combined thermal carrier comprises a thermal carrier pressure transmitter, an output temperature transmitter, a first output safety valve, a first electric blowoff valve, an output check valve, and an output stop valve, connected one another successively with pipelines.
Background of the invention Injecting saturated steam into oil formation for heavy oil extraction is one of the extensively applied methods worldwide. At present, injecting carbon dioxide and nitrogen individually into oil formation become a significant breakthrough in terms of new technology application for high crude oil production and enhanced oil recovery at various countries all over the world, which have shown their effects on oil production and economic benefits.
The combined thermal carrier containing high temperature nitrogen, carbon dioxide, water vapor as well as combustion heat carried is generated under the condition of closed burning environment with the help of both high temperature and high pressure combined thermal carrier generator. In the combined thermal carrier, carbon dioxide can play a role to dissolve crude oil while nitrogen plays a role of elastically flooding for crude oil, and steam plays a thermal role for crude oil. The combined thermal carrier is all injected through thermal injection pipeline into oil formation so as to enhance oil recovery and single-well productivity. Once injection is in process, it is required to adjust the combined thermal carrier based on injection parameters in terms of its temperature, flow rate and total amount of carrier injected thereby increasing the enhanced oil recovery and single-well productivity. Meanwhile, reliable control for temperature, pressure, and flow rate of the combined thermal carrier becomes a reliable technology for effectively compensating stratum energy for oilfields with low permeability.
At present, the combined thermal carrier generator operates relying generally on diesel as main fuel. Though it has shown excellent cost performance in terms of enhanced oil recovery and comprehensive benefits in comparison to conventional oil recovery techniques, diesel as fuel is still costly. If natural gas supply is available in the oil reservoir, the cost of natural gas is obviously lower than that of diesel. In such an oil reservoir most of associated gas is directly exhausted by either discharging it into air or burning it out, such that it wastes useful fuel material and pollutes the environment as well.
Therefore, by considering to lower the running cost using natural/associated gases as fuel, if natural gas or associated gas is available or provided in oil reservoir area the gas-type combined thermal carrier generator using these gases as burning gas can reduce production cost with the combined thermal carrier.
Summary of the invention In order to overcome the shortcomings mentioned above, it is an object of the present invention to provide a gas-type combined thermal carrier generation system in which the natural gas or associated gas as fuel generated along with the oil production in oil reservoir, it can effectively reduce running cost and realize carbon natural by reducing its emissions to zero as well as energy saving and emission reduction if oil reservoirs are available with these conditions mentioned above in the light of technology used to enhance the oil recovery and single-well productivity with gas-type combined thermal carrier comprehensive application.
The objective of the present invention is realized in such a way that it applies a gas-type combined thermal carrier generation system, which it comprises a combined thermal carrier generator, air pipeline, fuel pipeline and water pipeline, and an input end of the gas-type combined thermal carrier generator is connected with the air pipeline, gas pipeline and water pipeline, respectively.
An air regulating valve, an air mass flow meter, an air pressure transmitter, and an air check valve are successively arranged on the air pipeline. A first gas pressure transmitter, a gas stop valve, a gas constant temperature control system, a gas flow regulating valve, a gas mass flow meter, a second gas stop valve, a second gas pressure transmitter, and a gas check valve are successively arranged on the gas pipeline. The gas flow regulating valve is connected in parallel with a gas compensation regulating valve. A feed water control valve, a high frequency pressure varying pump, a first water pressure transmitter, a water filter, a water mass flow meter, a second water pressure transmitter, and a water check valve are successively arranged on the water pipeline. An output end of the combined thermal carrier generator is connected with oil formation through a delivery pipework of the combined thermal carrier. The delivery pipework of the combined thermal carrier comprises a thermal carrier pressure transmitter, an output temperature transmitter, a first output safety valve, a first electric blowoff valve, an output check valve, and an output stop valve, connected one another successively with pipelines.
In a first aspect, the combined thermal carrier generator is further arranged with a cooling water temperature transmitter.
In another aspect, an output end of the combined thermal carrier generator is further connected with a pipeline for recovering waste liquor, which comprises a second output safety valve and a second electric blowoff valve connected one another with pipelines, and the second output safety valve is connected in such a way that it is arranged between the first output safety valve and the first electric blowoff valve.
In further another aspect, a compressed air bypass is arranged on the gas pipeline, and the compressed air bypass includes a bypass pressure transmitter and three safety overflow valves connected one another in parallel. The three safety overflow valves are respectively connected with the first gas stop valve, gas flow regulating valve and second gas stop valve in series.
Compared with the prior-art technique, the gas-type combined thermal carrier generation system of the present invention uses natural gas or associated gas as fuel generated in the process of oil production in the oilfield, it can effectively reduce the running cost and realize carbon natural by reducing its emissions to zero as well as energy saving and emission reduction if oil reservoir area is available with these conditions mentioned above in the light of technology used to enhance the oil recovery and single-well productivity with gas-type combined thermal carrier comprehensive application.
Brief description of the drawings These and other features, aspects, and performances of the present invention will become better understood when the following detailed description is read with reference to the embodiments and accompanying drawings herein below.
Figure 1 is a schematic of gas-type combined thermal carrier generation system of one embodiment of the present invention.
Figure 2 is a schematic to describe the principle of gas flow regulating system of one embodiment of the present invention.
Figure 3 is a schematic to describe the principles of gas flow regulation and safety control system of one embodiment of the present invention.
Figure 4 is a schematic to describe the principle of temperature control system of one embodiment of the present invention.
Figure 5 is a schematic to describe the principle of safety control system of one embodiment of the present invention.
Description of numbers marked in the figures:
Combined thermal carrier generator 11 Cooling water temperature transmitter 12 Thermal carrier pressure transmitter 13 Output temperature transmitter 14 First output safety valve First electric blowoff valve 16 Output check valve 17 Output stop valve 18 Second output safety valve 19 Second electric blowoff valve Air pipeline 21 Air regulating valve 22 Air mass flow meter 23 Air pressure transmitter 24 Air check valve Gas pipeline 31 First gas pressure transmitter 32 First gas stop valve 33 Gas constant temperature control system 34 Gas flow regulating valve Gas compensation regulating valve 36 Gas mass flow meter 37 Second gas stop valve 38 Second gas pressure transmitter 39 Gas check valve 40 Water pipeline 41 Feed water regulating valve 42 High frequency pressure varying pump 43 First water pressure transmitter 44 Water filter 45 Water mass flow meter 46 Second water pressure transmitter 47 Water check valve 51 Bypass pressure transmitter 52 Safety overflow valve Detailed description of the embodiments Referring to Fig. 1, gas-type combined thermal carrier generation system 100 of one embodiment of the present invention may comprise a combined thermal carrier generator 10, a air pipeline 20, a gas pipeline 30, and a water pipeline 40. Combined thermal carrier generator 10 has three input ends and one output end. These input ends are connected with the air pipeline 20, gas pipeline 30, and water pipeline 40, respectively, thereby introducing air, gas and water, accordingly. In one embodiment, the gas can be natural gas. In another embodiment, the gas can be associated gas of oil reservoir. The combined thermal carrier generator 10 can output the combined thermal carriers comprising nitrogen, carbon dioxide and water vapor as required.
An air regulating valve 21, an air mass flow meter 22, an air pressure transmitter 23, and an air check valve 24 are successively arranged on air pipeline 20.
A first gas pressure transmitter 31, a first gas stop valve 32, a gas constant temperature control system 33, a gas flow regulating valve 34, a gas mass flow meter 36, a second gas stop valve 37, a second gas pressure transmitter 38, and a gas check valve 39 are successively arranged on gas pipeline 30. The gas flow regulating valve 34 is connected in parallel with a gas compensation regulating valve 35.
A feed water regulating valve 41, a high frequency pressure varying pump 42, a first water pressure transmitter 43, a water filter 44, a water mass flow meter 45, a second water pressure transmitter 46, and a water check valve 47 are successively arranged on water pipeline 40.
The output end of combined thermal carrier generator 10 is connected with oil formation through a delivery pipework. The delivery pipework of the combined thermal carrier comprises a thermal carrier pressure transmitter 12, an output temperature transmitter 13, a first output safety valve 14, a first electric blowoff valve15, a output check valve 16, and an output stop valve 17 connected one another in order. The combined thermal carrier generator 10 is arranged with a cooling water temperature transmitter 11. The output end of the combined thermal carrier generator 10 is further connected with a pipeline for recovering waste liquor, which comprises a second output safety valve 18 and a second electric blowoff valve 19 via pipelines connected one another.
The second output safety valve 18 is connected in such a way that it is arranged between the first output safety valve 14 and the first electric blowoff valve 15.
A compressed air bypass 50 is arranged on gas pipeline 30. The compressed air bypass 50 includes a bypass pressure transmitter 51 and three safety overflow valves 52 connected one another in parallel. The three safety overflow valves 52 are respectively connected with the first gas stop valve 32, the gas flow regulating valve 34, and the second gas stop valve 37 in series.
In the combined thermal carrier generation system of one embodiment of the present invention, air is input through air regulating valve 21 and air mass flow meter 22, and gas fuel mass is regulated with gas stop valves 32 and 37 and gas mass flow meter 36, and vaporized water mass is controlled by high frequency pressure varying pump 42 and water mass flow meter 45, and output temperature transmitter 13 is used to monitor and measure in situ output thermal carrier temperature, to realize temperature regulation for high temperature high pressure gas combined thermal carrier, and flow rate control for high temperature high pressure combined thermal carrier. The high temperature high pressure combined thermal carrier generated by combined thermal carrier generator 10 contains carbon dioxide, nitrogen and water vapor, in which the temperature of the output thermal carrier is controlled with mixing the vaporized water such that nitrogen, carbon dioxide, and combustion heat carried are comprehensively utilized to enhance the oil recovery and single-well productivity with this new thermal extraction technology.
The high temperature high pressure combined thermal carrier generated by combined thermal carrier generator 10 contains carbon dioxide, nitrogen and water vapor, in which the temperature of output thermal carrier is controlled with mixing the vaporized water. In order to secure safety in the process of injection, the combustion is controlled in accordance to coefficient of residual oxygen strictly within the range between 1.00-1.05, such that oxygen content of the output thermal carrier is much lower than 5% as required for safety sake. Finally, based on the requirements of geological technology concerning injection of thermal carrier to oil formation output stop valve 17 is connected to pipeline on ground to inject to the oil formation via Christmas tree under the conditions of certain temperature and pressure so as to satisfy the process requirements on increasing single-well productivity and enhanced oil recovery for oil reservoir. At the same time, in order to satisfy the different conditions of oil reservoirs, the injection flow rate in the process of injecting high temperature high pressure combined thermal carrier is controlled based on the air flow, once the air flow is confirmed the gas flow rate is automatically regulated such that the thermal carrier is completely combusted in high temperature and high pressure environment to output carbon dioxide, nitrogen and water vapor; Gas can be secured to be accurately combusted under the condition of high pressure through an automatic control system for gas flow rate in accordance to the given proportion of corresponding air mass; with accurate flow rate regulation by an automatic regulating system for gas flow and system compensation circulation control, it is realized to ignite the fire smoothly with both low flow rate high pressure and high flow rate high pressure to accurately control the combustion in a continuously stable and safety manner. A flow rate control system for high pressure deionized water can ensure the gas combined thermal carrier generator to be operated in safety and thermal carrier temperature to be controlled on the basis of process requirements as well.
Figure 2 is a schematic to describe the principle of gas flow regulating system of one embodiment of the present invention. Referring to Fig. 2, the gas-type combined thermal carrier generation system of one embodiment of the present invention controls the flow rate by gas flow regulating valve 34 of the gas flow regulating system, and a compensation system is formed with gas compensation regulating valve 35, and instantly blocking gas supply when power off is realized with gas stop valves 32 and 37, and gas constant temperature control system 33 is used to ensure that both high flow and low flow rates can satisfy the requirements on ignition for gas combined thermal carrier generator and temperature in operation, such that the flow control for high pressure combustion is stabilized.
Figure 3 is a schematic to describe the principles of gas flow regulation and safety control system of one embodiment of the present invention. Referring to Fig. 3, the gas-type combined thermal carrier generation system of one embodiment of the present invention is realized that both the output gas can be ignited at low flow rate at preset temperature and the stable control for high gas flow at high pressure by gas constant temperature control system 33 through gas flow regulating valve 34, gas compensation regulating valve 35 and gas mass flow meter 36, such that the gas flow can be input stably into the combined thermal carrier generator, thereby avoiding sudden stop of gas supply caused by unstable gas flow as well as realizing the safety control.
Figure 4 is a schematic to describe the principle of temperature control system of one embodiment of the present invention. Refer to Fig. 4, the gas-type combined thermal carrier generation system of one embodiment of the present invention controls the water flow with high frequency pressure varying pump 42 such that the temperature of the output thermal carrier can satisfy requirements on the process, meanwhile the water flow control can ensure cooling water temperature to satisfy equipment run in safety, and the core of gas-type combined thermal carrier generator can be firmly secured.
Figure 5 is a schematic to describe the principle of safety control system of one embodiment of the present invention. Refer to Fig. 5, the gas-type combined thermal carrier generation system of one embodiment of the present invention is realized with air pressure transmitter 23 at high pressure to detect the air pressure, air check valve 24 to prevent the combined thermal carrier to flow back thereby damaging components on the pipeline, air mass flow meter 22 to inject quantitatively the air flow mass, so as to monitor the pressure and flow rate in real time. Flow rate control for gas supply system and safety protection are realized through safety overflow valve 52, gas stop valves 32 and 37, gas mass flow meter 36, gas check valve 39, gas pressure transmitters 31 and 38 on the pipeline. The water quantity of water supply system and safety protection can be realized through water mass flow meter 45, water check valve 47, water filter 44, and water pressure transmitters 43 and 46 on the water pipeline. Alarm for stoppage and evacuation as well as pressure release due to feed back, extremely high temperature and pressure during the process of injection can be realized through output temperature transmitter 13, output safety valve 14, electric blowoff valve 19, output check valve 16, and output stop valve 17 on the output pipelines such that high temperature, high pressure, high efficiency injection technique can be satisfied.
In another aspect, an output end of the combined thermal carrier generator is further connected with a pipeline for recovering waste liquor, which comprises a second output safety valve and a second electric blowoff valve connected one another with pipelines, and the second output safety valve is connected in such a way that it is arranged between the first output safety valve and the first electric blowoff valve.
In further another aspect, a compressed air bypass is arranged on the gas pipeline, and the compressed air bypass includes a bypass pressure transmitter and three safety overflow valves connected one another in parallel. The three safety overflow valves are respectively connected with the first gas stop valve, gas flow regulating valve and second gas stop valve in series.
Compared with the prior-art technique, the gas-type combined thermal carrier generation system of the present invention uses natural gas or associated gas as fuel generated in the process of oil production in the oilfield, it can effectively reduce the running cost and realize carbon natural by reducing its emissions to zero as well as energy saving and emission reduction if oil reservoir area is available with these conditions mentioned above in the light of technology used to enhance the oil recovery and single-well productivity with gas-type combined thermal carrier comprehensive application.
Brief description of the drawings These and other features, aspects, and performances of the present invention will become better understood when the following detailed description is read with reference to the embodiments and accompanying drawings herein below.
Figure 1 is a schematic of gas-type combined thermal carrier generation system of one embodiment of the present invention.
Figure 2 is a schematic to describe the principle of gas flow regulating system of one embodiment of the present invention.
Figure 3 is a schematic to describe the principles of gas flow regulation and safety control system of one embodiment of the present invention.
Figure 4 is a schematic to describe the principle of temperature control system of one embodiment of the present invention.
Figure 5 is a schematic to describe the principle of safety control system of one embodiment of the present invention.
Description of numbers marked in the figures:
Combined thermal carrier generator 11 Cooling water temperature transmitter 12 Thermal carrier pressure transmitter 13 Output temperature transmitter 14 First output safety valve First electric blowoff valve 16 Output check valve 17 Output stop valve 18 Second output safety valve 19 Second electric blowoff valve Air pipeline 21 Air regulating valve 22 Air mass flow meter 23 Air pressure transmitter 24 Air check valve Gas pipeline 31 First gas pressure transmitter 32 First gas stop valve 33 Gas constant temperature control system 34 Gas flow regulating valve Gas compensation regulating valve 36 Gas mass flow meter 37 Second gas stop valve 38 Second gas pressure transmitter 39 Gas check valve 40 Water pipeline 41 Feed water regulating valve 42 High frequency pressure varying pump 43 First water pressure transmitter 44 Water filter 45 Water mass flow meter 46 Second water pressure transmitter 47 Water check valve 51 Bypass pressure transmitter 52 Safety overflow valve Detailed description of the embodiments Referring to Fig. 1, gas-type combined thermal carrier generation system 100 of one embodiment of the present invention may comprise a combined thermal carrier generator 10, a air pipeline 20, a gas pipeline 30, and a water pipeline 40. Combined thermal carrier generator 10 has three input ends and one output end. These input ends are connected with the air pipeline 20, gas pipeline 30, and water pipeline 40, respectively, thereby introducing air, gas and water, accordingly. In one embodiment, the gas can be natural gas. In another embodiment, the gas can be associated gas of oil reservoir. The combined thermal carrier generator 10 can output the combined thermal carriers comprising nitrogen, carbon dioxide and water vapor as required.
An air regulating valve 21, an air mass flow meter 22, an air pressure transmitter 23, and an air check valve 24 are successively arranged on air pipeline 20.
A first gas pressure transmitter 31, a first gas stop valve 32, a gas constant temperature control system 33, a gas flow regulating valve 34, a gas mass flow meter 36, a second gas stop valve 37, a second gas pressure transmitter 38, and a gas check valve 39 are successively arranged on gas pipeline 30. The gas flow regulating valve 34 is connected in parallel with a gas compensation regulating valve 35.
A feed water regulating valve 41, a high frequency pressure varying pump 42, a first water pressure transmitter 43, a water filter 44, a water mass flow meter 45, a second water pressure transmitter 46, and a water check valve 47 are successively arranged on water pipeline 40.
The output end of combined thermal carrier generator 10 is connected with oil formation through a delivery pipework. The delivery pipework of the combined thermal carrier comprises a thermal carrier pressure transmitter 12, an output temperature transmitter 13, a first output safety valve 14, a first electric blowoff valve15, a output check valve 16, and an output stop valve 17 connected one another in order. The combined thermal carrier generator 10 is arranged with a cooling water temperature transmitter 11. The output end of the combined thermal carrier generator 10 is further connected with a pipeline for recovering waste liquor, which comprises a second output safety valve 18 and a second electric blowoff valve 19 via pipelines connected one another.
The second output safety valve 18 is connected in such a way that it is arranged between the first output safety valve 14 and the first electric blowoff valve 15.
A compressed air bypass 50 is arranged on gas pipeline 30. The compressed air bypass 50 includes a bypass pressure transmitter 51 and three safety overflow valves 52 connected one another in parallel. The three safety overflow valves 52 are respectively connected with the first gas stop valve 32, the gas flow regulating valve 34, and the second gas stop valve 37 in series.
In the combined thermal carrier generation system of one embodiment of the present invention, air is input through air regulating valve 21 and air mass flow meter 22, and gas fuel mass is regulated with gas stop valves 32 and 37 and gas mass flow meter 36, and vaporized water mass is controlled by high frequency pressure varying pump 42 and water mass flow meter 45, and output temperature transmitter 13 is used to monitor and measure in situ output thermal carrier temperature, to realize temperature regulation for high temperature high pressure gas combined thermal carrier, and flow rate control for high temperature high pressure combined thermal carrier. The high temperature high pressure combined thermal carrier generated by combined thermal carrier generator 10 contains carbon dioxide, nitrogen and water vapor, in which the temperature of the output thermal carrier is controlled with mixing the vaporized water such that nitrogen, carbon dioxide, and combustion heat carried are comprehensively utilized to enhance the oil recovery and single-well productivity with this new thermal extraction technology.
The high temperature high pressure combined thermal carrier generated by combined thermal carrier generator 10 contains carbon dioxide, nitrogen and water vapor, in which the temperature of output thermal carrier is controlled with mixing the vaporized water. In order to secure safety in the process of injection, the combustion is controlled in accordance to coefficient of residual oxygen strictly within the range between 1.00-1.05, such that oxygen content of the output thermal carrier is much lower than 5% as required for safety sake. Finally, based on the requirements of geological technology concerning injection of thermal carrier to oil formation output stop valve 17 is connected to pipeline on ground to inject to the oil formation via Christmas tree under the conditions of certain temperature and pressure so as to satisfy the process requirements on increasing single-well productivity and enhanced oil recovery for oil reservoir. At the same time, in order to satisfy the different conditions of oil reservoirs, the injection flow rate in the process of injecting high temperature high pressure combined thermal carrier is controlled based on the air flow, once the air flow is confirmed the gas flow rate is automatically regulated such that the thermal carrier is completely combusted in high temperature and high pressure environment to output carbon dioxide, nitrogen and water vapor; Gas can be secured to be accurately combusted under the condition of high pressure through an automatic control system for gas flow rate in accordance to the given proportion of corresponding air mass; with accurate flow rate regulation by an automatic regulating system for gas flow and system compensation circulation control, it is realized to ignite the fire smoothly with both low flow rate high pressure and high flow rate high pressure to accurately control the combustion in a continuously stable and safety manner. A flow rate control system for high pressure deionized water can ensure the gas combined thermal carrier generator to be operated in safety and thermal carrier temperature to be controlled on the basis of process requirements as well.
Figure 2 is a schematic to describe the principle of gas flow regulating system of one embodiment of the present invention. Referring to Fig. 2, the gas-type combined thermal carrier generation system of one embodiment of the present invention controls the flow rate by gas flow regulating valve 34 of the gas flow regulating system, and a compensation system is formed with gas compensation regulating valve 35, and instantly blocking gas supply when power off is realized with gas stop valves 32 and 37, and gas constant temperature control system 33 is used to ensure that both high flow and low flow rates can satisfy the requirements on ignition for gas combined thermal carrier generator and temperature in operation, such that the flow control for high pressure combustion is stabilized.
Figure 3 is a schematic to describe the principles of gas flow regulation and safety control system of one embodiment of the present invention. Referring to Fig. 3, the gas-type combined thermal carrier generation system of one embodiment of the present invention is realized that both the output gas can be ignited at low flow rate at preset temperature and the stable control for high gas flow at high pressure by gas constant temperature control system 33 through gas flow regulating valve 34, gas compensation regulating valve 35 and gas mass flow meter 36, such that the gas flow can be input stably into the combined thermal carrier generator, thereby avoiding sudden stop of gas supply caused by unstable gas flow as well as realizing the safety control.
Figure 4 is a schematic to describe the principle of temperature control system of one embodiment of the present invention. Refer to Fig. 4, the gas-type combined thermal carrier generation system of one embodiment of the present invention controls the water flow with high frequency pressure varying pump 42 such that the temperature of the output thermal carrier can satisfy requirements on the process, meanwhile the water flow control can ensure cooling water temperature to satisfy equipment run in safety, and the core of gas-type combined thermal carrier generator can be firmly secured.
Figure 5 is a schematic to describe the principle of safety control system of one embodiment of the present invention. Refer to Fig. 5, the gas-type combined thermal carrier generation system of one embodiment of the present invention is realized with air pressure transmitter 23 at high pressure to detect the air pressure, air check valve 24 to prevent the combined thermal carrier to flow back thereby damaging components on the pipeline, air mass flow meter 22 to inject quantitatively the air flow mass, so as to monitor the pressure and flow rate in real time. Flow rate control for gas supply system and safety protection are realized through safety overflow valve 52, gas stop valves 32 and 37, gas mass flow meter 36, gas check valve 39, gas pressure transmitters 31 and 38 on the pipeline. The water quantity of water supply system and safety protection can be realized through water mass flow meter 45, water check valve 47, water filter 44, and water pressure transmitters 43 and 46 on the water pipeline. Alarm for stoppage and evacuation as well as pressure release due to feed back, extremely high temperature and pressure during the process of injection can be realized through output temperature transmitter 13, output safety valve 14, electric blowoff valve 19, output check valve 16, and output stop valve 17 on the output pipelines such that high temperature, high pressure, high efficiency injection technique can be satisfied.
Claims (4)
1. A gas-type combined thermal carrier generation system, comprising a combined thermal carrier generator, an air pipeline, a gas pipeline, and a water pipeline, which input ends of the combined thermal carrier generator is connected with the air pipeline, the gas pipeline and the water pipeline, respectively, an air regulating valve, an air mass flow meter, an air pressure transmitter, and an air check valve being successively arranged on the air pipeline;
a first gas pressure transmitter, a first gas stop valve, a gas constant temperature control system, a gas flow regulating valve, a gas mass flow meter, a second gas stop valve, a second gas pressure transmitter, and a gas check valve being successively arranged on the gas pipeline, and the gas flow regulating valve being connected in parallel with a gas compensation regulating valve;
a feed water regulating valve, a high frequency pressure varying pump, a first water pressure transmitter, a water filter, a water mass flow meter, a second water pressure transmitter, and a water check valve being successively arranged on the water pipeline;
an output end of the combined thermal carrier generator being connected with oil formation through a combined thermal carrier delivery pipework, the combined thermal carrier delivery pipework comprising a thermal carrier pressure transmitter, an output temperature transmitter, a first output safety valve, a first electric blowoff valve, an output check valve, and an output stop valve connected one another in order.
a first gas pressure transmitter, a first gas stop valve, a gas constant temperature control system, a gas flow regulating valve, a gas mass flow meter, a second gas stop valve, a second gas pressure transmitter, and a gas check valve being successively arranged on the gas pipeline, and the gas flow regulating valve being connected in parallel with a gas compensation regulating valve;
a feed water regulating valve, a high frequency pressure varying pump, a first water pressure transmitter, a water filter, a water mass flow meter, a second water pressure transmitter, and a water check valve being successively arranged on the water pipeline;
an output end of the combined thermal carrier generator being connected with oil formation through a combined thermal carrier delivery pipework, the combined thermal carrier delivery pipework comprising a thermal carrier pressure transmitter, an output temperature transmitter, a first output safety valve, a first electric blowoff valve, an output check valve, and an output stop valve connected one another in order.
2. A gas-type combined thermal carrier generation system according to claim 1, wherein the combined thermal carrier generator is further arranged with a cooling water temperature transmitter.
3. A gas-type combined thermal carrier generation system according to claim 1 or 2, wherein an output end of the combined thermal carrier generator is further connected with a pipeline for recovering waste liquor, which comprises a second output safety valve and a second electric blowoff valve via pipelines connected one another, and the second output safety valve being connected to be arranged between the first output safety valve and the first electric blowoff valve.
4. A gas-type combined thermal carrier generation system according to claim 1 or 2, wherein a compressed air bypass is arranged on the gas pipeline, the compressed air bypass comprising a bypass pressure transmitter and three safety overflow valves connected one another in parallel, which the three safety overflow valves are respectively connected with the first gas stop valve, the gas flow regulating valve, and the second gas stop valve in series.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310165320.8A CN103291268B (en) | 2013-05-08 | 2013-05-08 | Combustion gas composite heat carrier generator system |
| CN201310165320.8 | 2013-05-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2822235A1 true CA2822235A1 (en) | 2014-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2822235A Pending CA2822235A1 (en) | 2013-05-08 | 2013-07-29 | Gas-type combined thermal carrier generation system |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103291268B (en) |
| CA (1) | CA2822235A1 (en) |
| WO (1) | WO2014180067A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452538B (en) * | 2013-09-18 | 2016-06-22 | 江苏大江石油科技有限公司 | Pure oxygen natural gas composite heat carrier generator system |
| CN104047584A (en) * | 2014-06-04 | 2014-09-17 | 中国海洋石油总公司 | Duel fuel heat collecting miscible driving system |
| CN105351748A (en) * | 2015-11-09 | 2016-02-24 | 上海华之邦科技股份有限公司 | Device for making low-heating-value gas through natural gas and liquid nitrogen |
| CN108825191A (en) * | 2018-07-22 | 2018-11-16 | 江苏万兴石油装备有限公司 | A kind of temperature control type steam regulating device |
| CN109681155A (en) * | 2018-11-13 | 2019-04-26 | 中国石油天然气股份有限公司 | Production increasing method for reinjecting oil layer by associated tail gas of fire flooding oil field production well |
| CN109707355A (en) * | 2018-11-13 | 2019-05-03 | 中国石油天然气股份有限公司 | Throughput and yield increasing method for reinjecting heavy oil reservoir by associated gas of steam-driven oil field production well |
| CN113513708B (en) * | 2021-04-23 | 2023-12-05 | 大唐山西发电有限公司太原第二热电厂 | Self-operated pressure regulating valve fuel system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2734578A (en) * | 1956-02-14 | Walter | ||
| DE3612946A1 (en) * | 1986-04-17 | 1987-10-22 | Kernforschungsanlage Juelich | METHOD AND DEVICE FOR PETROLEUM PRODUCTION |
| CN2806760Y (en) * | 2005-04-14 | 2006-08-16 | 湖南天一赛马工程机械有限公司 | Composite carrier injection plant unit for petroleum thermal production |
| CN201053311Y (en) * | 2007-06-08 | 2008-04-30 | 杨文俊 | High-pressure high-temperature steam, nitrogen and carbon dioxide generator |
| CN201297164Y (en) * | 2008-10-23 | 2009-08-26 | 东营三原石油技术有限责任公司 | Energy-saving and viscosity-reducing device for producing oil from viscous oil well with hollow rod using heat carrier for obturating and circulating |
| CN201386541Y (en) * | 2009-04-09 | 2010-01-20 | 刘晓棠 | Wax removal and well cleanout device for gas heat carrier |
| CN101571039A (en) * | 2009-05-15 | 2009-11-04 | 沧州润涛石油设备有限公司 | Viscosity reduction heating method for heavy oil recovery in well |
| CN102305404B (en) * | 2011-07-19 | 2013-02-20 | 关兵 | Re-combustion injector of combustor of re-combustion supercritical pressure gas-liquid phase fuel generator |
-
2013
- 2013-05-08 CN CN201310165320.8A patent/CN103291268B/en not_active Expired - Fee Related
- 2013-07-09 WO PCT/CN2013/079029 patent/WO2014180067A1/en active Application Filing
- 2013-07-29 CA CA2822235A patent/CA2822235A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN103291268A (en) | 2013-09-11 |
| WO2014180067A1 (en) | 2014-11-13 |
| CN103291268B (en) | 2016-03-09 |
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