CN106499377B - electric ignition system - Google Patents
electric ignition system Download PDFInfo
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- CN106499377B CN106499377B CN201610892224.7A CN201610892224A CN106499377B CN 106499377 B CN106499377 B CN 106499377B CN 201610892224 A CN201610892224 A CN 201610892224A CN 106499377 B CN106499377 B CN 106499377B
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- coiled tubing
- temperature
- pressure
- cable
- electric igniter
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- 238000002347 injection Methods 0.000 claims abstract description 69
- 239000007924 injection Substances 0.000 claims abstract description 69
- 238000012544 monitoring process Methods 0.000 claims abstract description 63
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims description 47
- 230000003287 optical effect Effects 0.000 claims description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 11
- 239000011707 mineral Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 3
- 230000001131 transforming effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000000295 fuel oil Substances 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000011161 development Methods 0.000 abstract description 4
- 238000003825 pressing Methods 0.000 description 16
- 239000003921 oil Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- 239000003129 oil well Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010626 work up procedure Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 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
- E21B43/243—Combustion in situ
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
Landscapes
- 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)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a high-power electric ignition system suitable for heavy oil ultra-deep well fire development, which comprises a ground power supply system, a double-channel well mouth sealing blowout preventer, a coiled tubing cable, a temperature and pressure monitoring coiled tubing, a coiled tubing tripping operation device, a fire well mouth, an air injection system, an air injection pipe column, an electric igniter and a temperature and pressure monitoring center, wherein when the coiled tubing tripping operation device operates, the temperature and pressure monitoring coiled tubing is firstly tripped into the air injection pipe column through a first channel of the double-channel well mouth sealing blowout preventer, then the coiled tubing cable and the electric igniter are tripped into the air injection pipe column through a second channel, the coiled tubing cable is in equal-diameter connection with the electric igniter, the ground power supply system supplies power to the electric igniter through the coiled tubing cable, the temperature and pressure change monitoring center monitors the heating temperature and pressure change at the electric ignition system, the heating power is adjusted, and the sealing performance of the well mouth during safe operation at high pressure is ensured, so that the electric ignition system is safe and reliable.
Description
Technical Field
The embodiment of the invention relates to the technical field of thickened oil exploitation equipment, in particular to an electric ignition system.
Background
with the continuous development of the technology of the fireflooding oil well, the electric igniter is produced. At present, electric igniters for fireflooding mainly comprise a binding type electric igniter and a removable type oil well underground electric igniter.
in the application of the binding type electric igniter, the igniter is lowered into a target layer position by using an oil pipe column, and a power cable of the igniter is bound to the oil pipe and is connected with a ground control cabinet. In the process, the binding type electric igniter needs to be bound on an oil pipe through a cable, then the binding type electric igniter is put into a target layer from a wellhead to perform ignition operation, and the electric igniter is connected with power of a power cable, so that potential safety hazards of high pressure intolerance of wellhead sealing are caused. In the application of the removable oil well underground electric igniter, the igniter can not be completely lifted under pressure, and the problem of low high pressure resistance also exists.
Disclosure of Invention
the invention provides an electric ignition system which is suitable for the fire development of a thickened oil ultra-deep well.
The embodiment of the invention provides a high-power electric ignition system suitable for thick oil ultra-deep well fire burning development, which comprises: a ground power supply system, a dual-channel wellhead sealing blowout preventer, a coiled tubing cable, a temperature and pressure monitoring coiled tubing, a coiled tubing tripping operation device, an air injection system, a burning wellhead, an air injection pipe column, an electric igniter and a temperature and pressure monitoring center,
The ground power supply system is connected with the continuous pipe cable and used for providing single-phase power;
the coiled tubing cable is in constant diameter connection with the electric igniter for electrically transmitting the single phase electricity to the electric igniter;
The double-channel wellhead sealing blowout preventer is arranged above the fire wellhead;
The coiled tubing tripping operation device is used for tripping the temperature and pressure monitoring coiled tubing into the gas injection pipe column through a first passage of the dual-passage wellhead sealing blowout preventer and then sequentially tripping the coiled tubing cable and the electric igniter into the gas injection pipe column through a second passage of the dual-passage wellhead sealing blowout preventer;
the gas injection pipe column is arranged in a production casing below the burning well head, the gas injection system is connected with the gas injection pipe column through the burning well head, and an oil casing annulus is formed between the outer wall of the gas injection pipe column and the inner wall of the casing;
the temperature and pressure monitoring center is connected with the temperature and pressure monitoring continuous pipe and is used for acquiring and monitoring temperature and pressure signals.
in a possible implementation manner, a cold end is arranged on the electric igniter, and the continuous tube cable is connected with the electric igniter in an equal diameter mode through the cold end.
In one possible implementation, the cold end is filled with magnesium oxide mineral insulation.
In one possible implementation, the ground power supply system includes a three-phase single-phase control system and a voltage regulating transformer, the three-phase single-phase control system is used for converting three-phase power into single-phase power, and the voltage regulating transformer is used for regulating and transforming the single-phase power.
In one possible implementation, the dual-path wellhead seal blowout preventer comprises a first set of multi-stage dynamic seals, a second set of multi-stage seals, and a dual-path safety blowout preventer, wherein,
the first set of multi-stage dynamic seals are used for sealing the temperature and pressure monitoring continuous pipe;
the second set of multi-stage dynamic seals is used to seal the coiled tubing cable from the electric igniter;
The dual passageway safety blowout preventer is provided with the first passageway and the second passageway.
in a feasible implementation manner, the continuous tube cable is an inner shaft core wire, an insulating layer, an outer layer core wire and a continuous tube cable protective tube from inside to outside.
in one possible implementation, the electric igniter includes: the electric igniter comprises a resistance wire, mineral insulating substances and an electric igniter protective tube, wherein the resistance wire is arranged in the electric igniter protective tube, and the mineral insulating substances are filled in the electric igniter protective tube.
in one possible implementation, the electric igniter guard is at least 1050 ℃ resistant and the resistance wire is at least 1150 ℃ resistant.
in one possible implementation, the warm pressure monitoring coiled tubing includes: the temperature and pressure monitoring device comprises a temperature and pressure monitoring continuous tube protective tube, an optical cable, a pressure measuring capillary tube and a standby capillary tube, wherein the optical cable, the pressure measuring capillary tube and the standby capillary tube are arranged in the temperature and pressure monitoring continuous tube protective tube.
In a feasible implementation, the gas injection system includes nitrogen injection system, air compressor, oxygen reduction device and booster compressor, and during the ignition the air compressor reaches the booster compressor passes through the gas injection tubular column does the electric igniter provides the air, during the fire extinguishing the nitrogen injection system passes through the gas injection tubular column does the electric igniter provides oxygen reduction air or nitrogen gas.
in a feasible implementation manner, the warm-pressing monitoring center includes a temperature measuring optical transceiver, a pressure sensor and a data acquisition system, the temperature measuring optical transceiver is connected with an optical cable of the warm-pressing monitoring continuous pipe and is used for acquiring and monitoring temperature data, the pressure sensor is connected with the pressure measuring capillary of the warm-pressing monitoring continuous pipe and is used for monitoring pressure signal changes, and the data acquisition system is connected with the pressure sensor and is used for acquiring and monitoring pressure data.
the invention provides an electric ignition system, which comprises a ground power supply system, a dual-channel wellhead sealing blowout preventer, a coiled tubing cable, a warm-pressing monitoring coiled tubing, a coiled tubing tripping operation device, a burning wellhead, an air injection system, an air injection tubular column, an electric igniter and a warm-pressing monitoring center, wherein when the coiled tubing tripping operation device operates, the warm-pressing monitoring coiled tubing is firstly tripped into the air injection tubular column through a first channel of the dual-channel wellhead sealing blowout preventer, then the coiled tubing cable and the electric igniter are tripped into the air injection tubular column through a second channel, the coiled tubing cable is in equal-diameter connection with the electric igniter, the ground power supply system supplies power to the electric igniter through the coiled tubing cable, the warm-pressing monitoring center is respectively connected with an optical cable and a capillary of the warm-pressing monitoring coiled tubing, and the warm-pressing monitoring center heats the temperature and the pressure of the electric ignition system through the warm-pressing monitoring coiled tubing, Monitoring pressure change and adjusting heating power. Because the coiled tubing cable is connected with the electric igniter in an equal-diameter mode, the coiled tubing cable and the electric igniter are integrated, and the high-pressure seal has continuity and integrity, so that the high-pressure tightness during safe operation of a wellhead is ensured, and the electric ignition system is safe and reliable. Meanwhile, compared with a binding type electric igniter, the electric igniter is not limited by cable transmission, can be put into an ultra-deep well and can be applied to the heavy oil ultra-deep well; compared with a removable oil well underground igniter, the continuous pipe cable, the electric igniter and the temperature and pressure monitoring continuous pipe can be pulled down when the pressure of a well head is less than or equal to 69MPa, the construction period is greatly shortened, the pressure resistance of the continuous pipe cable, the electric igniter and the temperature and pressure monitoring continuous pipe is also ensured, the electric ignition system can be put into an ultra-deep well, and the electric ignition system can be applied to a heavy oil ultra-deep well (less than 1500 m).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the method of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the method of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive effort.
FIG. 1 is a schematic diagram of an electrical ignition system according to an embodiment of the present invention;
FIG. 2A is a schematic diagram of a coiled tubing cable in an electrical ignition system according to an embodiment of the present invention;
FIG. 2B is a three-dimensional view of FIG. 2A;
FIG. 3A is a schematic diagram of an electrical igniter, according to an embodiment of the invention;
FIG. 3B is a three-dimensional view of FIG. 3A;
FIG. 4 is a schematic view of a resistance wire according to an embodiment of the present invention;
Fig. 5A is a schematic structural diagram of a continuous tube for monitoring temperature and pressure according to an embodiment of the present invention;
FIG. 5B is a three-dimensional view of FIG. 5A;
description of reference numerals:
1: a ground power supply system;
2: a dual-channel wellhead sealing blowout preventer;
3: a coiled tubing cable;
4: a continuous pipe for monitoring temperature and pressure;
5: a coiled tubing tripping operation device;
6: a gas injection system;
7: burning the well mouth;
8: a gas injection pipe column;
9: an electric igniter;
10: a temperature and pressure monitoring center;
31: an inner core wire;
32: an insulating layer;
33: an outer core wire;
34: a coiled tubing cable sheath;
41: a resistance wire;
42: a mineral insulating substance;
43: the electric igniter protective tube.
51: a continuous pipe is protected by monitoring the temperature and the pressure;
52: an optical cable;
53: a pressure measuring capillary tube;
54: the capillary was ready for use.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of an electrical ignition system according to an embodiment of the present invention. The structure and the operation principle of the electric ignition system according to the embodiment of the present invention will be described in detail with reference to fig. 1.
first, the structure of the electric ignition system.
Referring to fig. 1, the present invention provides an electric ignition system comprising: the system comprises a ground power supply system 1, a double-channel wellhead sealing blowout preventer 2, a coiled tubing cable 3, a temperature and pressure monitoring coiled tubing 4, a coiled tubing tripping operation device 5, an air injection system 6, a burning wellhead 7, an air injection pipe column 8, an electric igniter 9 and a temperature and pressure monitoring center 10, wherein the ground power supply system 1 is connected with the coiled tubing cable 3 and is used for providing single-phase electricity; the coiled tubing cable 3 is connected isodiametrally to the electric igniter 9 for transmitting the single phase electricity to the electric igniter 9; the dual-channel wellhead sealing blowout preventer 2 is arranged above the burning well 7, and the coiled tubing tripping operation device 5 is used for tripping the temperature and pressure monitoring coiled tubing 4 into the gas injection pipe column 8 through a first channel of the dual-channel wellhead sealing blowout preventer 2 and sequentially tripping the coiled tubing cable 3 and the electric igniter 9 into the gas injection pipe column 8 through a second channel of the dual-channel wellhead sealing blowout preventer 2; the gas injection tubular column 8 sets up in the production sleeve of burning with fire well head 7 below, gas injection system 6 passes through burning with gas injection tubular column 8 connects, form the oil jacket annular space between the outer wall of gas injection tubular column 8 and the sheathed tube inner wall, promptly gas injection system 6 with burning with fire well head 7 links to each other and forms two routes of 8 gas injections of gas injection tubular column and the annular space gas injection of oil jacket, the optical cable in the warm-pressing monitoring continuous pipe 4 with the temperature measurement optical terminal machine of warm-pressing monitoring center 10 is connected for gather and monitor temperature, pressure signal. The Temperature measuring optical transceiver is, for example, a Distributed Temperature Sensing (DTS).
secondly, the working principle of the electric igniter.
specifically, in the process of electric ignition operation, the ground power supply system 1 supplies power to an electric igniter 9 through a continuous pipe cable 3, wherein the igniter is, for example, an electric igniter at a 2100m well depth of a thickened oil ultra-deep well and at a pressure of less than or equal to 69 megapascals (MPa). The coiled tubing tripping operation device 5 is of a skid-mounted structure and is used for tripping the warm-pressing monitoring coiled tubing 4, the coiled tubing cable 3 and the electric igniter 9 in sequence. During the running process, the coiled tubing tripping device 5 runs the temperature and pressure monitoring coiled tubing 4 into the gas injection pipe column 8 through a first passage of the dual-passage wellhead sealing blowout preventer 2, for example, a 20mm passage, the warm-pressure monitoring coiled tube 4 was lowered through the first passage to 2100m of the gas injection tube 8, coiled tubing cable 3 and electric igniter 9 are then lowered into gas injection string 8 through a second passageway, such as a 25.4mm passageway, the coiled tubing cable 3 and the electric igniter 9 were lowered through the second passage to 2100m of the gas-injection tube 8, so that the temperature and pressure monitoring continuous pipe 4, the continuous pipe cable 3 and the electric igniter 9 are positioned in the gas injection pipe column 8, the optical cable in the temperature and pressure monitoring continuous pipe 4 is connected with the DTS temperature measuring optical transceiver of the temperature and pressure monitoring center 10 and is used for collecting and monitoring temperature and pressure signals. The electric ignition system collects temperature and pressure change data of the bottom of the well during heating through the temperature and pressure monitoring center 10, and adjusts heating power and gas injection quantity. The gas injection pipe column 8 is installed inside the production casing below the fire well head 7, serves as a gas injection channel, and accommodates the coiled tubing cable 3, the electric igniter 9, and the warm-pressure monitoring coiled tubing 4. The burning well head 7 is suitable for burning huff and puff/fireflood well, is installed on the ground, and the lower part is connected with a sleeve and an oil pipe to form the gas injection pipe column and the oil sleeve annulus, the upper part is provided with the double-channel well head sealing blowout preventer, and the two sides are connected with the gas injection pipeline of the gas injection system 6. The gas injection system 6 is arranged near a well head, is connected with the burning well head 7 through a gas injection pipeline, and is respectively communicated with the gas injection pipe column 8 and the oil sleeve annulus.
The electric ignition system comprises a ground power supply system, a dual-channel wellhead sealing blowout prevention device, a coiled tubing cable, a temperature and pressure monitoring coiled tubing, a coiled tubing tripping operation device, a burning wellhead, an air injection system, an air injection tubular column, an electric igniter and a temperature and pressure monitoring center. Because the coiled tubing cable is connected with the electric igniter in an equal-diameter mode, the coiled tubing cable and the electric igniter are integrated, and the high-pressure seal has continuity and integrity, so that the high-pressure tightness during safe operation of a wellhead is ensured, and the electric ignition system is safe and reliable. Meanwhile, compared with a binding type electric igniter, the electric igniter is not limited by cable transmission, can be put into an ultra-deep well and can be applied to the heavy oil ultra-deep well; compared with a removable oil well underground igniter, the continuous pipe cable, the electric igniter and the temperature and pressure monitoring continuous pipe can be pulled down when the pressure of a well head is less than or equal to 69MPa, the construction period is greatly shortened, the pressure resistance of the continuous pipe cable, the electric igniter and the temperature and pressure monitoring continuous pipe is also ensured, the electric ignition system can be put into an ultra-deep well, and the electric ignition system can be applied to a heavy oil ultra-deep well (less than 1500 m).
generally, the temperature of the coiled tubing cable 3 is about 300 ℃, and in order to avoid damaging the coiled tubing cable during ignition, optionally, in an embodiment of the invention, a cold end is provided on the electric igniter 9, and the coiled tubing cable 3 is connected with the electric igniter 9 in a constant diameter manner through the cold end.
In particular, assuming that the length of the electric igniter 9 is 90m, a cold end of a certain length, for example, a cold end filled with magnesium oxide mineral insulation of 30m length, may be added to the end of the electric igniter 9 to which the coiled tubing cable 3 is connected, thereby protecting the coiled tubing cable that is resistant to temperatures of 300 ℃. After the cold end is added, the heating power of the electric igniter 9 is adjusted, and when the gas injection amount reaches 5000-25000 m3/d, the heating temperature reaches 600 ℃.
Optionally, in an embodiment of the present invention, the ground power supply system 1 includes: the three-phase single-phase power supply comprises a three-phase single-phase control system and a voltage regulating transformer, wherein the three-phase single-phase control system is used for converting three-phase power into single-phase power, and the voltage regulating transformer is used for regulating and transforming the voltage of the single-phase power.
Specifically, the three-phase input power, such as 380V and 50HZ alternating current, is converted into 1560V, 500HZ and 200KW of unidirectional power by a three-to-one converter control system, and the unidirectional power is output in three stages through a regulating transformer, with the conversion ratios of 25/14, 32/14 and 39/14. In actual operation, single-phase power with different transformation ratios can be selected for the underground electric igniter according to actual conditions.
Optionally, in an embodiment of the present invention, the dual-path wellhead sealing blowout preventer 2 includes a first set of multi-stage dynamic sealers, a second set of multi-stage dynamic sealers, and a dual-path safety blowout preventer. The first set of multi-stage dynamic sealer is used for sealing the temperature and pressure monitoring continuous pipe 4, namely the first set of multi-stage dynamic sealer is a dynamic sealer for the temperature and pressure monitoring continuous pipe 4 to work up and down, the second set of multi-stage dynamic sealer is used for sealing the continuous pipe cable and the electric igniter, namely the second set of multi-stage dynamic sealer is a dynamic sealer for the continuous pipe cable 3 to work up and down with the electric igniter 9, and both sets of multi-stage dynamic sealers can resist the pressure of 69MPa and resist the temperature of 250 ℃; the double-channel safety blowout preventer is a safety auxiliary device which is installed in consideration of well control safety, and is provided with a second channel for starting and stopping operation of a coiled tubing cable 3 and an electric igniter 9 and a first channel for starting and stopping operation of a temperature and pressure monitoring coiled tubing 4, wherein the pressure resistance of the double-channel safety blowout preventer is 69MPa, and the temperature resistance of the double-channel safety blowout preventer is 250 ℃.
optionally, in an embodiment of the present invention, the continuous tube cable 3 is a coaxial cable which sequentially includes, from inside to outside, an inner core wire 31, an insulating layer 32, an outer core wire 33, and a continuous tube cable sheath 34. Specifically, referring to fig. 2A and fig. 2B, fig. 2A is a schematic structural diagram of a coiled tubing cable in an electric ignition system according to an embodiment of the present invention, and fig. 2B is a three-dimensional view of fig. 2A.
referring to fig. 2A and 2B, the continuous tube cable 3 is a coaxial cable comprising an inner core wire 31, an insulating layer 32, an outer core wire 33, and a continuous tube cable sheath 34 in sequence from inside to outside. The inner core wire 31 is, for example, 30mm2, the insulating layer 32 is, for example, an insulating layer resistant to 300 ℃, the outer core wire 33 is, for example, a copper multi-core outer core wire of 30mm2, and the continuous tube cable protective tube 34 is, for example, a 10CMn protective tube specially made by phi 25.4 mm.
optionally, in an embodiment of the present invention, the electric igniter 9 includes: a resistance wire 41, a mineral insulation 42 and an electric igniter guard 43, the resistance wire 41 being arranged in the electric igniter guard 43, the mineral insulation 42 being filled in the electric igniter guard 43. Specifically, referring to fig. 3A and fig. 3B, fig. 3A is a schematic structural diagram of an electric igniter according to an embodiment of the present invention, and fig. 3B is a three-dimensional view of fig. 3A. .
Specifically, referring to fig. 3A and 3B, the resistance wire 41 is made of nichrome, for example, and has a resistance wire with a high temperature resistance of more than 1150 ℃, and has the advantages of high mechanical strength, good toughness, and reusability, and the heating power is as high as 200kw, and the heating temperature can reach 600 ℃ when gas is injected into the resistance wire with a large displacement of 5000-25000 m 3/d.
Optionally, in an embodiment of the present invention, the temperature resistance of the electric igniter guard 43 is at least 1050 ℃, the temperature resistance of the resistance wire 41 is at least 1150 ℃, and the resistance wire 41 is, for example, a nickel-chromium wire (such as Cr15Ni60) or an iron-chromium wire; the mineral insulating substance is magnesium oxide.
optionally, in an embodiment of the present invention, the resistance wire 41 is U-shaped. Specifically, referring to fig. 4, fig. 4 is a schematic view of a resistance wire according to an embodiment of the present invention.
Optionally, in an embodiment of the present invention, the warm-pressure monitoring coiled tubing 4 includes: the temperature and pressure monitoring device comprises a temperature and pressure monitoring continuous pipe protective pipe 51, an optical cable 52, a pressure measuring capillary 53 and a spare capillary 54, wherein the optical cable 52 is arranged in the temperature and pressure monitoring continuous pipe protective pipe 51, the pressure measuring capillary 53 is arranged in the temperature and pressure monitoring continuous pipe protective pipe 51, and the spare capillary 54 is arranged in the temperature and pressure monitoring continuous pipe protective pipe 51. Specifically, referring to fig. 5A and 5B, fig. 5A is a schematic structural diagram of an electric igniter according to an embodiment of the present invention, and fig. 5B is a three-dimensional view of fig. 5A.
specifically, the diameter of the warm-pressure monitoring continuous pipe protective pipe 51 is, for example, 20mm, the diameter of the optical cable 52 is, for example, an optical fiber with a diameter of 6.35mm, which may be, for example, an optical fiber, the diameters of the pressure measuring capillary 53 and the backup capillary 54 are, for example, 6.35mm, and both are empty pipes, the bottom of the pressure measuring capillary 53 is communicated with a pressure guiding joint at the bottom of the warm-pressure monitoring continuous pipe, the top of the pressure measuring capillary 53 is connected with a sensor at a warm-pressure monitoring center for measuring pressure, and the backup capillary 54 is used as a backup for starting when the pressure measuring capillary 53 fails.
optionally, in an embodiment of the present invention, the gas injection system 6 includes a nitrogen injection system, an air compressor, an oxygen reduction device, and a supercharger, the air compressor and the supercharger provide air for the electric igniter through the gas injection pipe column during ignition, the nitrogen injection system provides oxygen reduction air or nitrogen for the electric igniter through the oil jacket annulus during fire extinguishing, and in addition, nitrogen is injected through the oil jacket annulus, so that fire climbing can be prevented.
optionally, in an embodiment of the present invention, the warm-pressing monitoring center 10 includes a temperature measuring optical transceiver, a pressure sensor, and a data collecting system, where the temperature measuring optical transceiver is connected to an optical cable of the warm-pressing monitoring continuous pipe and is used to collect and monitor temperature data, the pressure sensor is connected to the pressure measuring capillary of the warm-pressing monitoring continuous pipe and is used to monitor pressure signal changes, and the data collecting system is connected to the pressure sensor and is used to collect and monitor pressure data.
In summary, in the electric ignition system provided by the embodiment of the invention, the electric igniter is connected with the coiled tubing cable in an equal-diameter structure, and is put into a well through the double-channel wellhead sealing blowout preventer, so that the electric ignition system can be safely put down when the wellhead pressure is 69 Mpa. In addition, the heating point position can be adjusted during the use process.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An electrical ignition system, comprising: a ground power supply system, a dual-channel wellhead sealing blowout preventer, a coiled tubing cable, a temperature and pressure monitoring coiled tubing, a coiled tubing tripping operation device, an air injection system, a burning wellhead, an air injection pipe column, an electric igniter and a temperature and pressure monitoring center,
The ground power supply system is connected with the continuous pipe cable and used for providing single-phase power;
The coiled tubing cable is in constant diameter connection with the electric igniter for electrically transmitting the single phase electricity to the electric igniter;
The double-channel wellhead sealing blowout preventer is arranged above the fire wellhead;
the coiled tubing tripping operation device is used for tripping the temperature and pressure monitoring coiled tubing into the gas injection pipe column through a first passage of the dual-passage wellhead sealing blowout preventer and then sequentially tripping the coiled tubing cable and the electric igniter into the gas injection pipe column through a second passage of the dual-passage wellhead sealing blowout preventer;
The gas injection pipe column is arranged in a production casing below the burning well head, the gas injection system is connected with the gas injection pipe column through the burning well head, and an oil casing annulus is formed between the outer wall of the gas injection pipe column and the inner wall of the casing;
The temperature and pressure monitoring center is connected with the temperature and pressure monitoring continuous pipe and is used for acquiring and monitoring temperature and pressure signals;
the electric igniter is provided with a cold end, and the continuous tube cable is in equal-diameter connection with the electric igniter through the cold end;
the cold end is filled with magnesium oxide mineral insulation;
the warm-pressure monitoring coiled tubing comprises: the temperature and pressure monitoring device comprises a temperature and pressure monitoring continuous tube protective tube, an optical cable, a pressure measuring capillary tube and a standby capillary tube, wherein the optical cable, the pressure measuring capillary tube and the standby capillary tube are arranged in the temperature and pressure monitoring continuous tube protective tube.
2. the electrical ignition system of claim 1, wherein the ground power supply system comprises a three-phase to single-phase control system for converting three-phase power to the single-phase power, and a regulating transformer for regulating and transforming the single-phase power.
3. the electric ignition system of claim 1, wherein the dual-path wellhead seal blowout preventer comprises a first set of multi-stage dynamic seals, a second set of multi-stage seals, and a dual-path safety blowout preventer,
The first set of multi-stage dynamic seals are used for sealing the temperature and pressure monitoring continuous pipe;
The second set of multi-stage dynamic seals is used to seal the coiled tubing cable from the electric igniter;
The dual passageway safety blowout preventer is provided with the first passageway and the second passageway.
4. the electrical ignition system of claim 1, wherein the coiled tubing cable is an inner core wire, an insulation layer, an outer core wire, and a coiled tubing cable sheath from inside to outside.
5. the electrical ignition system of claim 1, wherein the electrical igniter comprises: the electric igniter comprises a resistance wire, mineral insulating substances and an electric igniter protective tube, wherein the resistance wire is arranged in the electric igniter protective tube, and the mineral insulating substances are filled in the electric igniter protective tube.
6. The electrical ignition system of claim 5, wherein the shield of the electrical igniter is at least 1050 ℃ and the resistance wire is at least 1150 ℃.
7. The electrical ignition system of claim 1, wherein the gas injection system comprises a nitrogen injection system, an air compressor, an oxygen reduction device, and a booster, the air compressor and booster providing air to the electrical igniter through the gas injection string during ignition, and the nitrogen injection system providing oxygen or nitrogen reduction air to the electrical igniter through the gas injection string during fire suppression.
8. The electric ignition system of claim 1, wherein the warm-pressure monitoring center comprises a temperature measuring optical transceiver, a pressure sensor and a data collecting system, the temperature measuring optical transceiver is connected with the optical cable of the warm-pressure monitoring continuous pipe and is used for collecting and monitoring temperature data, the pressure sensor is connected with the pressure measuring capillary of the warm-pressure monitoring continuous pipe and is used for monitoring pressure signal changes, and the data collecting system is connected with the pressure sensor and is used for collecting and monitoring pressure data.
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| CN201610892224.7A CN106499377B (en) | 2016-10-13 | 2016-10-13 | electric ignition system |
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| CN201610892224.7A CN106499377B (en) | 2016-10-13 | 2016-10-13 | electric ignition system |
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| CN106499377A CN106499377A (en) | 2017-03-15 |
| CN106499377B true CN106499377B (en) | 2019-12-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108798622A (en) * | 2018-06-06 | 2018-11-13 | 中国石油天然气股份有限公司 | Fireflood ignition device, assembly method of fireflood ignition device and ignition method of fireflood ignition device |
| CN109184648B (en) * | 2018-09-12 | 2023-09-26 | 中国石油天然气股份有限公司 | Movable electric igniter |
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