CN106194117B - A kind of method for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform - Google Patents
A kind of method for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform Download PDFInfo
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- CN106194117B CN106194117B CN201610663975.1A CN201610663975A CN106194117B CN 106194117 B CN106194117 B CN 106194117B CN 201610663975 A CN201610663975 A CN 201610663975A CN 106194117 B CN106194117 B CN 106194117B
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- 238000000034 method Methods 0.000 title claims abstract description 87
- 230000000630 rising effect Effects 0.000 claims abstract description 10
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005457 optimization Methods 0.000 claims abstract description 8
- 239000003345 natural gas Substances 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 38
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000004088 simulation Methods 0.000 claims description 17
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- OIWCYIUQAVBPGV-DAQGAKHBSA-N {1-O-hexadecanoyl-2-O-[(Z)-octadec-9-enoyl]-sn-glycero-3-phospho}serine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP(O)(=O)OC[C@H](N)C(O)=O)OC(=O)CCCCCCC\C=C/CCCCCCCC OIWCYIUQAVBPGV-DAQGAKHBSA-N 0.000 description 1
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Abstract
The present invention relates to a kind of methods for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform, it is characterised in that including the following contents：1) natural gas collects successively through SWV and the laggard process pipelines of becoming owner of of manual isolating valve, then enters outer defeated submerged pipeline after the shut-off valve of the pressure protective system on main process pipelines, and Hai Guanrukouchu is provided with SDV；2) most fast pressure rising time dynamic analog is carried out to main process pipelines；3) SWV shut-in times and the dynamic analog of main process pipelines boosting situation are carried out, determines whether main process pipelines pressure rating can reduce a grade；4) if it is determined that main process pipelines pressure rating can reduce a grade, then repeat step 2) and 3), judge whether main process pipelines pressure rating can continue to reduce, if it can continue to reduce, then main process pipelines pressure rating is continued to optimize, if cannot continue to reduce, main process pipelines pressure rating optimization is completed.The present invention can be widely applied in the main process pipelines pressure rating setting of marine unmanned wellhead platform.
Description
Technical field
The present invention relates to a kind of methods for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform, belong to marine stone
Oil tech field.
Background technology
At sea in unmanned wellhead platform technological design, for conservative consideration, generally by the main process pipelines in top according to pass
Well pressure carries out total head design, even if the main process pipelines in such top are under the conditions of shut-in pressure, it is also ensured that pipeline will not
There is superpressure operating mode, but lack the research that whether can reach shut-in pressure operating mode on earth to pressure in pipeline, so as to
It causes the setting of integrated artistic line pressure grade excessively high, is unsatisfactory for the requirement of cost efficiency.
Invention content
In view of the above-mentioned problems, the optimization that disclosure satisfy that cost efficiency requirement the object of the present invention is to provide a kind of it is marine nobody
The method of the main process pipelines pressure rating of wellhead platform.
To achieve the above object, the present invention takes following technical scheme：A kind of marine unmanned main technique of wellhead platform of optimization
The method of line pressure grade, including the following contents：1) natural gas enters main process pipelines through SWV and manual isolating valve, successively and converges
Collection, then enter outer defeated submerged pipeline after the shut-off valve of the pressure protective system on main process pipelines, it is set in Hai Guanrukouchu
There is SDV, wherein, SWV is flutter valve on well, and SDV is outer defeated extra large pipe shut-off valve；2) main process pipelines progress most fast pressure rising time is moved
Morphotype is intended, i.e., under SDV accidentally shutdown operating mode, each gas well upstream line pressure under different gas production is increased to and is set than pipeline
The simulation of the low level of pressure of pressure, and respectively obtain the most fast gas production of each gas well boosting；3) carry out the SWV shut-in times with
The dynamic analog of main process pipelines boosting situation, i.e., under SDV accidentally shutdown operating mode, corresponding boosting that each gas well is obtained with step 2)
Based on most fast gas production, SWV is under the different shut-in times for simulation, and the boosting situation of main process pipelines obtains main process duct
Line pressure is increased to the maximum duration needed for than the low level of pressure of pipeline setting pressure, if to be nominally off the time small by SWV
In the maximum duration, then main process pipelines pressure rating is set as setting one grade of pressure reduction than pipeline original；4) it repeats to walk
It is rapid 2) and 3), judge whether main process pipelines pressure rating can continue to reduce, if can continue to reduce, to main process pipelines
Pressure rating continues to optimize, if cannot continue to reduce, terminates main process pipelines pressure rating optimization, obtains main process pipelines
Practical attainable maximum pressure.
Preferably, the software used in dynamic analog is process modeling software HYSYS.
The present invention has the following advantages due to taking above technical scheme：1st, the present invention carries out main process pipelines first
Then most fast pressure rising time dynamic analog carries out SWV (flutter valve on well) shut-in times and main process pipelines boosting situation dynamic analog
Intend, pass through more than two parts dynamic analog, you can determine whether main process pipelines pressure rating can set pressure reduction than original
One grade prevents main process pipelines pressure rating excessively high due to conservative design, avoids increase construction cost.2nd, work as process pipelines
After pressure rating reduces, the cold flare relief amount of pipeline also decreases, so as to optimize the size of cold emptying surge tank, into one
Cost efficiency is walked, and it is horizontal to improve marine unmanned wellhead platform technological design.The present invention can be widely applied to it is marine nobody
In the main process pipelines pressure rating setting of wellhead platform.
Description of the drawings
Fig. 1 is the unmanned main process pipelines pressure rating division figure of wellhead platform in sea before present invention optimization；
Fig. 2 is the unmanned main process pipelines pressure rating division figure of wellhead platform in sea after present invention optimization.
Specific embodiment
Come to carry out the present invention detailed description below in conjunction with attached drawing.It should be appreciated, however, that attached drawing has been provided only more
Understand the present invention well, they should not be interpreted as limitation of the present invention.
As shown in Figure 1, the gas field of the unmanned wellhead platform in sea of the embodiment of the present invention includes gas well a, gas well b and gas well altogether
Tri- implication wells of c, identical three implication well shaft calibers are 6 ", and natural gas is along pit shaft 10 through SWV (flutter valve on well) 20 and corresponding hand
The laggard process pipelines (production manifold) 40 of becoming owner of of dynamic isolating valve, 30 collect, then through the pressure protective system on main process pipelines 40
After shut-off valve 50, into outer defeated submerged pipeline, Hai Guanrukouchu is provided with a SDV (outer defeated extra large pipe shut-off valve) 60.According to this
Gas field maximum shut-in pressure (285BarG) determines that the pressure rating of main process pipelines 40 is 2500#, and 2500#/1500# is pressed
After power separation is arranged on the shut-off valve 50 of pressure protective system, in this way pressure anomaly operating mode (such as SDV 60 is accidentally turned off)
Under, after the closing of shut-off valve 50 of pressure protective system, the line pressure before shut-off valve 50 can bear 2500# level of pressure, and
Line pressure after shut-off valve 50 will not superpressure.
For further cost efficiency, the embodiment of the present invention, can be by 2500#/1500# pressure ratings by dynamic analog
After separation moves forward to manual isolating valve, 30, main 40 pressure rating of process pipelines is integrally reduced to 1500# pressure ratings,
Particular content is：
1st, main process pipelines 40 are carried out with most fast pressure rising time dynamic analog, i.e., under SDV60 accidentally shutdown operating mode, to each gas
Well upstream line pressure is increased under different gas production to be set pressure than pipeline (pipeline most started sets pressure as gas field
Maximum shut-in pressure) a low level of pressure simulation, and accordingly obtain each gas well and boost most fast gas production.
The process is mainly simulated and is had no progeny in SDV60 fail closes, and marine unmanned wellhead platform top process pipelines are from normal
Operating pressure starts raising until gas field maximum shut-in pressure (285BarG), due to the three implication well oil pipe calibers of the present embodiment
It is identical, therefore primary most fast pressure rising time analog interface is only carried out, if the oil pipe caliber of each gas well differs, need to carry out respectively
The simulation of most fast pressure rising time.The present embodiment is by taking gas well a as an example, by different gas production from minimum 20MMscfd to 180MMscfd
The boosting simulation under different gas production is carried out, is finally analyzed according to pressure rising time, determines that upstream line boosts to 1500# grade pressures
Shortest gas production the time required to power, as the gas production of research SWV20 shut-in times, physical simulation step：
1) steady-state operation 10 seconds under a certain gas production, it is without being limited thereto as example；
2) after 10 seconds, SDV60 is closed；
3) pressure and flow before and after monitoring oil outlet；
4) after main 40 pressure of process pipelines reaches maximum shut-in pressure, simulation is completed；
5) time when record pressure rise is to 1500# level of pressure；
6) above-mentioned simulation steps are repeated, the simulation of different output operating mode is carried out, is respectively completed 20MMscfd to 180MMscfd
Simulation under different gas production obtains table 1, from table 1 it follows that the process pipelines boosting under 50MMscfd gas production is most
Soon, the time is 32 seconds.Therefore, using 50MMscfd as next step research SWV20 shut-in times and main process pipelines pressure rise
The aerogenesis magnitude of situation.
Table 1
2nd, SWV20 shut-in times and the dynamic analog of main process pipelines 40 boosting situation are carried out, i.e., accidentally turns off work in SDV60
Under condition, each gas well is based on the most fast gas production of the boosting that step 1 accordingly obtains, and SWV20 is under the different shut-in times for simulation,
The boosting situation of main process pipelines 40 obtains main 40 pressure rise of process pipelines to a level of pressure lower than maximum shut-in pressure
Required maximum duration, if SWV20 is nominally off the time less than the maximum duration, main 40 pressure rating of process pipelines can be with
A grade is reduced than maximum shut-in pressure.
The process is had no progeny in SDV60 fail closes, and marine unmanned wellhead platform top process pipelines are from routine operating pressure
Start to increase, SWV20 is within the setting shut-in time, and whether SWV20 downstream pressures are more than 1500# level of pressure.The present embodiment
The most fast 50MMscfd that boosts that the gas production that the simulation of three implication wells uses is obtained using step 1, simulation operating mode press SWV20
Begun to shut off in the case where line pressure reaches high high shutdown setting pressure (135BarG), the shut-in time is 6 seconds respectively, 10 seconds, 20
The boosting situation of second, 30 seconds, physical simulation step：
1) steady-state operation is simulated 10 seconds, without being limited thereto as example；
2) after 10 seconds, SDV60 is closed；
3) main 40 pressure of process pipelines is begun to ramp up, and is begun to shut off when pressure reaches high shutdown pressure, and the 6th second completely
Close SWV20；
4) pressure and flow of SWV20 upstream and downstream are monitored；
5) after SWV20 is completely closed, simulation is completed；
6) above step is repeated, carries out the simulation of other shut-in times, obtains that the results are shown in Table 2.
Table 2
From Table 2, it can be seen that except the SWV20 shut-in times be 30 seconds when process pipelines pressure be more than 1500#
Outside (250BarG) level of pressure, the process pipelines pressure under other 3 operating modes is less than 1500# level of pressure, passes through fitting
The maximum duration that analysis can obtain needed for pressure rise to 1500# level of pressure is 23 seconds.According to constructive accounting, valve is closed
Speed is 1 cun/second according to valve size, therefore the SWV20 that the gas field size is 6 " in 6 seconds was closed and is enough to ensure that main work
40 pressure of pipeline adc does not exceed 1500# level of pressure.It therefore, can be by 2500#/1500# pressure boundaries on main process pipelines
Point be advanced to after POPS systems shut-off valve 50 production manifold remote holder move isolating valve, 30 after, as shown in Figure 2.What pressure rating reduced
Meanwhile the cold flare relief amount of pipeline is also reduced, so as to advanced optimize cold blow-down tank size.
3rd, using the pressure of a grade lower than maximum shut-in pressure as main process pipelines set pressure, repeat step 1 and
2, judge whether main 40 pressure rating of process pipelines can continue to reduce, if can continue to reduce, main process pipelines 40 are pressed
Power grade continues to optimize, if cannot continue to reduce, completes main process pipelines pressure rating optimization, it is real to obtain main process pipelines
The attainable maximum pressure in border.
In above-described embodiment, the software used in dynamic analog is international process modeling software HYSYS.
The various embodiments described above are merely to illustrate the present invention, and wherein each implementation steps of method etc. are all that can be varied from
, every equivalents carried out on the basis of technical solution of the present invention and improvement should not exclude the protection in the present invention
Except range.
Claims (2)
- A kind of 1. method for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform, it is characterised in that including following interior Hold：1) natural gas enters main process pipelines through SWV and manual isolating valve, successively and collects, then is protected through the pressure on main process pipelines Enter outer defeated submerged pipeline after the shut-off valve of protecting system, Hai Guanrukouchu is provided with SDV, wherein, SWV is flutter valve on well, SDV For outer defeated extra large pipe shut-off valve；2) most fast pressure rising time dynamic analog is carried out to main process pipelines, i.e., under SDV accidentally shutdown operating mode, to each gas well upstream tube Line pressure rising condition under different gas production is simulated, and is recorded pressure under each gas well difference gas production and is increased to and is set than pipeline Time needed for the pressure of the low grade of constant-pressure, and the pressure rising time of record is analyzed and then determines each gas well boosting Most fast gas production；3) SWV shut-in times and the dynamic analog of main process pipelines boosting situation are carried out, i.e., under SDV accidentally shutdown operating mode, each gas Well is based on the most fast gas production of the corresponding boosting that step 2) obtains, and SWV is under the different shut-in times for simulation, main process pipelines Boosting situation, when obtaining main process pipelines pressure rise to than longest needed for the low level of pressure of pipeline setting pressure Between, if SWV is nominally off the time less than the maximum duration, main process pipelines pressure rating is set as setting than pipeline original and press Power reduces a grade；4) step 2) is repeated with 3), judges whether main process pipelines pressure rating can continue to reduce, if can continue to reduce, Main process pipelines pressure rating is continued to optimize, if cannot continue to reduce, terminates main process pipelines pressure rating optimization, obtains To the practical attainable maximum pressure of main process pipelines.
- 2. a kind of method for optimizing the marine unmanned main process pipelines pressure rating of wellhead platform as described in claim 1, special Sign is that the software used in dynamic analog is process modeling software HYSYS.
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| NO344235B1 (en) | 2018-01-05 | 2019-10-14 | Roxar Software Solutions As | Well flow simulation system |
| CN117236046B (en) * | 2023-09-27 | 2024-04-09 | 西南石油大学 | Calculation model and method for maximum shut-in pressure in oil and gas well drilling process |
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| US9777559B2 (en) * | 2014-04-29 | 2017-10-03 | China Petroleum & Chemical Corporation | Reliability assessment and risk management for managed pressure drilling |
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