CN204532309U - Intelligence steam regulates real-time control apparatus - Google Patents
Intelligence steam regulates real-time control apparatus Download PDFInfo
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- CN204532309U CN204532309U CN201520088446.4U CN201520088446U CN204532309U CN 204532309 U CN204532309 U CN 204532309U CN 201520088446 U CN201520088446 U CN 201520088446U CN 204532309 U CN204532309 U CN 204532309U
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Abstract
Intelligence steam regulates real-time control apparatus, comprise control terminal, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve, flow meter and steam quality detect meter, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve is in series with successively at steam input pipe road end, connection traffic meter and steam quality detect meter again, export the steam of equal constant flow; Vaporometer is provided with before first electronic thermal production well mouth steam valve and after the second electronic thermal production well mouth steam valve; Control terminal connects the real-time detected parameters signal that the signal of the vaporometer before the first electronic thermal production well mouth steam valve after vaporometer and the second electronic thermal production well mouth steam valve, the aperture parameter signal of electric control valve, flow meter and steam quality detect meter, and control terminal exports the valve opening control end connecing electric control valve.
Description
One, technical field
The utility model is applicable to oil field gas injection thermal recovery engineering, steam pipeline system.A kind of steam flow, pressure in pipeline accurately to be controlled and device steam quality being carried out to real-time feedback control in real time.
Two, background technology
China's viscous crude resource distribution is extensive, rich reserves, and viscous crude resource 300 × 10 is estimated in the whole nation
8t, has verified and has reached 16 × 10 with control reserve
8t, land viscous crude resource accounts for the fourth-largest viscous crude producing country of the world after more than 20%, Shi Ji U.S. of oil total resources, Canada and Venezuela.At present, it is 7.01 × 10 that the super-viscous oil that China not yet employs verifies oil in place
8t, along with the continuous growth of energy demand, needs large quantity high performance thickened oil recovery equipment and technology badly
In recent years, China also accelerates the exploitation of viscous crude, and the output of current viscous crude has accounted for more than 1/10th of national oil annual production.In the oil exploitation in oil field, viscous crude has special high viscosity and high-solidification point characteristic, all runs into some technical barriers in the various aspects of development and application.With regard to production technique, colloid, asphalitine and long chain paraffin cause the mobility of crude oil in reservoir and pit shaft to be deteriorated, and require the tertiary oil recovery process implementing high investment.High conveying that is sticky, High viscosity crude must adopt more powerful pumping equipment, and in order to reach rational pump displacement, requires heat induction system or carry out dilution process to crude oil.Steam soak is the major technique of current thickened oil recovery, accounts for 97% in China's thickened oil recovery.
First steam soak normally utilizes high-pressure boiler to produce high steam, injects high steam by high pressure line to underground heavy oil tested layer, promotes viscous crude intensification viscosity reduction; Then utilize in, low-pressure boiler produce low pressure steam, carry out vapour and drive and accompany heat.The mass dryness fraction injecting steam is more high better, but in order to save the energy, the general wet saturated steam of mass dryness fraction more than 50% injecting steam.
Steam soak can only crude oil near each oil well of extraction in oil reservoir, also leaves a large amount of " region of bypassed oil " between oil well and oil well, takes steam flooding thermal process for improving recovery ratio further.Steam flooding heats to oil reservoir by injecting high-quality steam, to be driven to by crude oil around producing well and by its extraction.Steam flooding technology originates from the 1950's.Steam flooding technology, after being born, successively experienced by the slow development of the seventies in last century six, advancing by leaps and bounds of the 80s and 90s, has now developed into a ripe thermal recovery technology.
At present, steam flooding obtains large-scale industrial application abroad, becomes heavy crude reservoir, the heavy crude reservoir particularly after steam soak, improves the effective ways of recovery ratio, and achieves good effect.Steam drive oil production occupies very important status in EOR (oil recovery by heating).With 2000 data instance, in the U.S., Canada and Indonesia, the proportion that steam flooding accounts for EOR is respectively 55%, 75% and 94%.
The oil field, Kern river of California, USA is the oil field of successfully carrying out steam drive development in the world the earliest, its original oil in place 6.36 billion cubic meter.Take over steam flooding by interlayer from bottom to top, current Kern river oil field day produce oil 1.6 ten thousand tons, the layer group recovery ratio that vapour had driven reaches 62.4%, and accumulation gas oil ratio reaches 0.32.In Indonesia Du, oil field is the oil field that at present steam flooding is largest in the world, and its original oil in place is 7.9 hundred million tons, starts Large-scale vapor and drive after 1985, current day produce oil 4.5 ten thousand tons.China is test and application steam flooding technology from the end of the eighties in last century.At the beginning of the nineties at the end of the eighties in last century, China has successively carried out 8 steam flooding pilot tests in Xinjiang Oilfield and Liaohe Oil Field.Energy-saving and emission-reduction, improving capacity efficiency, reduce investment, is the main new development trend of world's thickened oil recovery.Steam flooding technology is ripe, but the size to steam flow, the detection FEEDBACK CONTROL of pressure height and steam quality, still also exists a large amount of problem.
Prior art is in order to meet the demand of the different phase heavy crude heat extractions such as steam soak, thermal recovery, the defeated companion's heat of collection, traditional heavy crude heat extraction technique adopt respectively high-pressure boiler with in, low-pressure boiler provides the wet saturated steam of different brackets, need two kinds of boilers, the steam pipe line of two output different pressures grades.A large amount of manpowers and material resources and a large amount of pipelines is needed to invest.
The CN201310380533 heavy crude heat extraction decompression method that the applicant proposes and device patent, the thermal recovery that mesohigh steam heating boiler and low pressure steam boiler carry out viscous crude can be applicable to simultaneously, the thermal source of thermal recovery provides steam by decompressor: the depressurized system of thermal recovery pressure reduction device is made up of higher-pressure region reducing valve and middle nip second depressurized valve two parts, there is second depressurized structure, be applicable to the various working condition of heavy crude heat extraction; Be provided with after high steam reducing valve valve control and the mesohigh steam output pipe of parallel connection, mesohigh steam heating boiler steam all has output steam pipe by high steam reducing valve or middle nip second depressurized valve; Be applicable to steam flooding respectively or low-pressure steam drives or hot water flooding.Can steam pressure in timing monitoring steam pipeline, easy to operate, and two stop valves are set by the air intake place respectively at steam pipeline, a stop valve is set at steam bleeding mouth place, guarantees the safety of steam injecting pipe and gas utilization unit.But fail to consider to inject the control of well head steam quality.Simultaneously, because the actual condition of steam injection well is all different, every mouthful of steam injection well self down-hole pressure threshold values is different, fluctuation is large, does not have stability, can not accurately control the steam flow size of whole pipeline and outlet pressure size, cause a large amount of waste of steam, service efficiency is low, and whole pipe-line system security performance can not be guaranteed, and affects the benefit of whole thermal recovery.
Inject well head steam quality cannot accurately detect, require that steam injection mass dryness fraction is higher, exploitation effect is better, and the lower effect of mass dryness fraction is poorer.
But the mass dryness fraction of too high pursuit steam not only causes the loss of the energy, and increase the pollution to environment.As prior art has had the existence of the dryness factor measurement method comprising indirect inspection (neural net method),
Disclosed oil field gas injection thermal recovery engineering dryness factor measurement method has: the model of the control survey mass dryness fraction of Houston Thermal Corp, the CRC-CD2001 type steam dryness control device of U.S. ZWORLD, the radioactive method that Atomic Energy corporation of Canada proposes measures mass dryness fraction, and SY-BOSOFT model measurement steam quality, for the measurement of supporting instrument method to mass dryness fraction.
One of most critical equipment involved in the middle of existing oil-field thick-oil thermal recovery operation implementation process is just injection boiler.The topmost key work of injection boiler is: utilize demineralized water, by the reactive mode of heating evaporation, can evaporate the humidity steam being formed and have remarkable saturability feature.And by this part, humidity steam is enforceable transfers in the middle of oilbearing stratum, and this part humidity steam also oil-field thick-oil thermal recovery operation supplying heat source place of being carried out smoothly just.Therefore, how under various different operation condition, all the time by the steam dryness control of uphole steam generator in the middle of this limit value, become relevant staff's issues that need special attention.Mainly comprise: 1, uphole steam generator steam dryness control: the steam dryness control standard corresponding to uphole steam generator is advisable with 80%.If the steam quality >80% corresponding to uphole steam generator, then the problem that injection boiler may be caused to occur under the running status of chronicity in boiler tube is overheated or be easily damaged etc.; Under the technical condition of present stage are supported, for the demand for control of Dryness Fraction of Steam-injection Boiler, the control program taked relates to following several types more: (1) controls based on the PID of tandem; (2) PID based on fuzzy principle controls; (3) based on the PREDICTIVE CONTROL of multi-stage variable.
But existing oil field gas injection thermal recovery equipment does not adopt steam to regulate and controls in real time, can not OBD and protective device, breaking down easily expands, causes worse consequence, can the human and material resources of large losses.
Three, utility model content
The utility model object is; propose a kind of intelligent steam based on existing oil field gas injection thermal recovery engineering and regulate real-time control method and device; it is a kind of method and apparatus oil field gas injection thermal recovery equipment being adopted to OBD and protection; the generation of breaking down in time and expansion, need a large amount of human and material resources.Make existing thermal recovery adopt suitable proterctive equipment, material and safeguard procedures, prevent the thermal recovery equipment of oil well short, fragile for application life.
The technical solution of the utility model is: heavy crude heat extraction steam regulates real-time control apparatus, comprise control terminal, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve, flow meter and steam quality detect meter, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve is in series with successively at steam input pipe road end, connection traffic meter and steam quality detect meter again, export the steam of equal constant flow;
Vaporometer is provided with before first electronic thermal production well mouth steam valve and after the second electronic thermal production well mouth steam valve; Control terminal connects the real-time detected parameters signal that the signal of the vaporometer before the first electronic thermal production well mouth steam valve after vaporometer and the second electronic thermal production well mouth steam valve, the aperture parameter signal of electric control valve, flow meter and steam quality detect meter, and control terminal exports the valve opening control end connecing electric control valve.
At the steam pipeline of series connection first electronic thermal production well mouth steam valve V1, electric control valve V and a second electronic thermal production well mouth steam valve V2 pipeline in parallel and straight-through valve VH, form the binary channel structure of steam input; When first electronic thermal production well mouth steam valve V1, electric control valve V and the second electronic thermal production well mouth steam valve V2 close, VH opens the steam that directly can input boiler and export.
Heavy crude heat extraction steam of the present utility model regulates real-time control method: steam input pipe road is in series with the first electronic thermal production well mouth steam valve V1, electric control valve V, the second electronic thermal production well mouth steam valve V2 successively, connection traffic meter and steam quality detect meter again, export the steam of equal constant flow.
Field control terminal is adopted to control steam input, control terminal gathers the steam pressure parameter before the first electronic thermal production well mouth steam valve V1 after steam pressure parameter and the second electronic thermal production well mouth steam valve V2: the aperture parameter of electric control valve V, flow meter and steam quality detect the real-time detected parameters of meter, and export the aperture controling parameters of electric control valve V;
Steam input pressure limit is at 8-17MPa; P2 scope control is at 17-0.6MPa; Conveying steady flow 1-10T/h steam, be still provided with steam quality checkout gear D during delivering vapor, the front end of D arranges drain valve V3.
Steam pressure parameter after steam pressure parameter before first electronic thermal production well mouth steam valve V1 and the second electronic thermal production well mouth steam valve V2 is detected in real time, real-time metering signal is carried out by steam flow instrument, through converting the signal that electric device controls to, real time contrast is carried out with the flow value signal of setting, the aperture size of fine adjustment electric control valve valve cage, reach required steam flow, the precision controlling of flow is in 1.5% scope.The aperture of the first electronic thermal production well mouth steam valve V1 and the second electronic thermal production well mouth steam valve V2 is controlled, its aperture is set as three fixing apertures of 40%, 70% and 100% respectively, when inputting steam reduction more than 10MP, V1, V2 are set as 40% aperture, input steam reduce 5-10MPa V1, V2 be set as one be 40% aperture another be 70% aperture, the adjustment of electric control valve is undertaken by PID regulative mode.
Adopt wet saturated steam mass dryness fraction detection technique, the actual mass dryness fraction of Real-time Feedback steam is to master-control room, and the height of master-control room to steam quality regulates in real time, ensures the efficiency injecting steam.
Steam input pressure limit is exported by boiler at 8-17MPa, controls mass dryness fraction about 80%, is controlled by boiler.
Adopt and real time measure carried out to steam flow, carry out real time contrast with required flow, steam flow needed for fine adjustment number, guaranteed flow stable.
Adopt wet saturated steam mass dryness fraction detection technique, the actual mass dryness fraction of Real-time Feedback steam, so that the height of master-control room to steam quality regulates in real time, ensure the efficiency injecting steam.Adopt radial base neural net (RBF) technology, combined by soft-measuring technique with existing mass dryness fraction intelligent detection device, research and development wet saturated steam mass dryness fraction real-time online detects, feeds back and alarm technique, improves accuracy of detection and sensitivity.Mass dryness fraction detection feedback and adjustment process are as shown in Figure 1.
Control terminal connects main control room by communication line (wired or wireless), realizes the real-time Transmission of floor data.Main control room can control simultaneously boiler export and producing well for information about, controling parameters is passed to field control terminal in time, has double-direction control pattern and regulates in real time control to steam.
The beneficial effects of the utility model: adopt field control and main control room double-direction control pattern, realize the real-time Transmission of floor data.
Electric control valve adopts up-to-date cellular buck configuration, ensures accurate flow adjustment and pressure, improves the stable of whole pipe-line system, ensures the safety of producing.
3, before adopting steam valve, pressure P 1 and downstream pressure P2 detect in real time, comparison real-time with needs force value, accurately control required pressure size, ensure the stable of pressure.
4, adopt real time measure carried out to steam flow, carry out real time contrast with required flow, steam flow needed for fine adjustment number, guaranteed flow stable.
5, adopt wet saturated steam mass dryness fraction detection technique, the actual mass dryness fraction of Real-time Feedback steam, so that the height of master-control room to steam quality regulates in real time, ensure the efficiency injecting steam.Adopt radial base neural net (RBF) technology, combined by soft-measuring technique with existing mass dryness fraction intelligent detection device, research and development wet saturated steam mass dryness fraction real-time online detects, feeds back and alarm technique, improves accuracy of detection and sensitivity.Mass dryness fraction detection feedback and adjustment process are as shown in Figure 1.
6, the utility model three valves of connecting regulate, and adopt two access structures, no longer need two kinds of boilers and two to export the steam pipe line of different pressures grades.The reliable of pid control mode worked in coordination with by three valves, only needs high-pressure boiler and high pressure steam line, saves a large amount of manpowers and material resources and a large amount of pipelines and invest.
7, adopt Novel steam trap valve group SZ67Y-250V structure, remove the moisture in steam pipework, improve the safety of steam quality and pipeline.
8, on-line monitoring and remote operation module is adopted, improve intellectuality and the automatization level of device, the modern information technologies such as integrated use GPRS wireless communication technology, SQL Server database management technology and dynamic web page issue, the on-line monitoring of realize target product, accident alarming and remote-operated object, improve intellectuality and the automatization level of device.
9, adopt high temperature resistant with low temperature resistant material manufacture, ensure the long life.
10, use easy to operate, there is Self-Test Diagnostics ability, for ease of maintenaince.
11, all instrument, adjusting device, valve, pipeline etc. all concentrate in an instrument box, prevent the erosion of dust storm and artificial damage.
Four, accompanying drawing explanation
Fig. 1 mass dryness fraction detects feedback and adjustment process schematic diagram;
Fig. 2 is the neutral net schematic diagram measuring the detection of wet saturated steam mass dryness fraction;
Fig. 3 on-line monitoring and remote operating system structural representation;
Fig. 4 is that the utility model heavy crude heat extraction steam regulates real-time control apparatus structural representation.
Five, detailed description of the invention
Fig. 1-2 steam quality that wet saturated steam mass dryness fraction detection technique controls boiler exports, the actual mass dryness fraction of Real-time Feedback steam, so that the height of master-control room to steam quality regulates in real time, ensures the efficiency injecting steam.Adopt radial base neural net (RBF) technology, combined by soft-measuring technique with existing mass dryness fraction intelligent detection device, research and development wet saturated steam mass dryness fraction real-time online detects, feeds back and alarm technique, improves accuracy of detection and sensitivity.
On-line monitoring and remote operating system structural representation as shown in Figure 3, give master-control room and the utility model field control.
In Fig. 4, during the electronic thermal production well mouth steam valve V2 of electric control valve V back, finally open electric control valve and carry out automatic operation.By the real-time detection of pressure gauge P1, P2 before and after electric control valve V and flow meter L, real-time comparison is carried out with setting numerical value, automatically regulate, by drain valve group, get rid of the condensed water in steam, ensure the safety of pipeline, detected by wet saturated steam mass dryness fraction and steam quality is detected, ensure that the mass dryness fraction of steam for thermal recovery meets the requirements and improves whole thermal recovery efficiency.
If do not need steam pressure to change, disconnect electric control valve and the electronic thermal production well mouth steam valve before and after it, open bypass electric adjustable nodal pattern thermal production well mouth steam valve VP and just can reach requirement.
Be illustrated in fig. 4 shown below, when the wet saturated steam that high-pressure boiler is sent here by high pressure line, first required steam flow and required pressure is set, when opening the electronic thermal production well mouth steam valve V2 of electric control valve electronic thermal production well mouth steam valve V1 in front and electric control valve V back, finally open electric control valve and carry out automatic operation.By the real-time detection of pressure gauge P1, P2 before and after electric control valve V and flow meter L, real-time comparison is carried out with setting numerical value, automatically regulate, by drain valve group, get rid of the condensed water in steam, ensure the safety of pipeline, detected by wet saturated steam mass dryness fraction and steam quality is detected, ensure that the mass dryness fraction of steam for thermal recovery meets the requirements and improves whole thermal recovery efficiency.The PID of tandem controls to control to control the aperture of electric control valve based on the PID of fuzzy principle.
If do not need steam pressure to change, disconnect electric control valve and the electronic thermal production well mouth steam valve before and after it, open bypass electric adjustable nodal pattern thermal production well mouth steam valve VP and just can reach requirement.
Online steam quality instrumentation, treats that mass dryness fraction instrument application is in steam flow measurement and bucking-out system, will improve the accuracy of metering further at present.Following three measures should be taked: the pipeline of (1) delivering vapor must have good Insulation to prevent thermal loss.(2) hydrophobic piecemeal on steam pipework, the pipeline before the lowest part and instrument of pipeline should arrange drain valve V3, discharge condensed water in time.(3) should avoid in boiler attendance occurring the too high phenomenon of liquid level of steam drum, reduce load as far as possible and occur large fluctuation.
Shown in Fig. 4, when the wet saturated steam that high-pressure boiler is sent here by high pressure line, first required steam flow and required pressure is set, when opening the electronic thermal production well mouth steam valve of electric control valve electronic thermal production well mouth steam valve in front and electric control valve back, finally open electric control valve and carry out automatic operation.By the real-time detection of front and back pressure tester and flow meter, real-time comparison is carried out with setting numerical value, automatically regulate, by drain valve group, get rid of the condensed water in steam, ensure the safety of pipeline, detected by wet saturated steam mass dryness fraction and steam quality is detected, ensure that the mass dryness fraction of steam for thermal recovery meets the requirements and improves whole thermal recovery efficiency.If do not need steam pressure to change, disconnect electric control valve and the electronic thermal production well mouth steam valve before and after it, open bypass electric adjustable nodal pattern thermal production well mouth steam valve and just can reach requirement.
Claims (3)
1. intelligent steam regulates real-time control apparatus, it is characterized in that comprising control terminal, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve, flow meter and steam quality detect meter, the first electronic thermal production well mouth steam valve, electric control valve, the second electronic thermal production well mouth steam valve is in series with successively at steam input pipe road end, connection traffic meter and steam quality detect meter again, export the steam of equal constant flow;
Vaporometer is provided with before first electronic thermal production well mouth steam valve and after the second electronic thermal production well mouth steam valve; Control terminal connects the real-time detected parameters signal that the signal of the vaporometer before the first electronic thermal production well mouth steam valve after vaporometer and the second electronic thermal production well mouth steam valve, the aperture parameter signal of electric control valve, flow meter and steam quality detect meter, and control terminal exports the valve opening control end connecing electric control valve.
2. intelligent steam according to claim 1 regulates real-time control apparatus, it is characterized in that, at the steam pipeline of series connection first electronic thermal production well mouth steam valve, electric control valve and a second electronic thermal production well mouth steam valve pipeline in parallel and straight-through valve, forming the binary channel structure of steam input.
3. intelligent steam according to claim 1 regulates real-time control apparatus
,it is characterized in that electric control valve is cellular buck configuration.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104695922A (en) * | 2015-02-06 | 2015-06-10 | 江苏万兴石油装备有限公司 | Intelligent steam regulation real-time control method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695922A (en) * | 2015-02-06 | 2015-06-10 | 江苏万兴石油装备有限公司 | Intelligent steam regulation real-time control method and device |
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