CN207623167U - Analogue system is evaluated in hydrate recovery well machinery screen cutting - Google Patents
Analogue system is evaluated in hydrate recovery well machinery screen cutting Download PDFInfo
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- CN207623167U CN207623167U CN201721643375.5U CN201721643375U CN207623167U CN 207623167 U CN207623167 U CN 207623167U CN 201721643375 U CN201721643375 U CN 201721643375U CN 207623167 U CN207623167 U CN 207623167U
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- oil pipe
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- 238000005520 cutting process Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 139
- 238000004088 simulation Methods 0.000 claims abstract description 59
- 239000002245 particle Substances 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 103
- 239000007788 liquid Substances 0.000 claims description 102
- 238000002347 injection Methods 0.000 claims description 40
- 239000007924 injection Substances 0.000 claims description 40
- 239000012530 fluid Substances 0.000 claims description 21
- 238000001802 infusion Methods 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 15
- 238000004064 recycling Methods 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 6
- 238000009527 percussion Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 89
- 230000003628 erosive effect Effects 0.000 abstract description 55
- 150000004677 hydrates Chemical class 0.000 abstract description 19
- 238000013461 design Methods 0.000 abstract description 13
- 238000002474 experimental method Methods 0.000 abstract description 10
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 7
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 239000003345 natural gas Substances 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract description 3
- -1 natural gas hydrates Chemical class 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 28
- 238000004519 manufacturing process Methods 0.000 description 24
- 230000008569 process Effects 0.000 description 24
- 235000013339 cereals Nutrition 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 8
- 230000033228 biological regulation Effects 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 3
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- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
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Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The utility model discloses a kind of hydrate recovery well machinery screen cutting evaluation analogue system, including underground subsystem, ground subsystem and data acquisition subsystem, it disclosure satisfy that the full-scale emulation of practical exploitation of gas hydrates well screen plumber's condition, simulation result are used directly for exploiting ocean natural gas hydrates well screen pipe erosion attack assessment of scenario；Screen cutting and practical hydrate producing well working condition are combined initiatively, pass through pressure sensor, differential pressure pickup, online laser particle analyzer and the well head concentration measuring apparatus that shakes out are combined, realize the real-time monitoring of screen cutting situation, erosion attack rule of the screen casing under hydrate working condition can be obtained by simulated experiment, evaluate Anti-erosion adaptability of the screen casing in hydrate recovery process, and then it is the design of exploitation of gas hydrates well screen pipe outer protective cover diversion trench, screen casing type it is preferred, the indicating risk of decompression control sand scheme and the transformation interval selection of storage provide data supporting.
Description
Technical field
It, can be into more particularly to one kind the utility model is related to ocean gas hydrate development of resources field of engineering technology
The preferred screen casing of erosion simulation result is evaluated and are based on to the emulation of sand control screen erosion process, erosion parameters in row hydrate production tubing
Analogue system.
Background technology
Gas hydrates are a kind of natural gas energy resources being stabilized 1000000 years found the seventies in last century, this
In solid preservation containing hydrocarbon compound and ocean and frozen soil as ice.Countries in the world are expanded with regard to the exploitation of gas hydrates
Competition, global at present to have carried out large-scale pilot production for several times, China is also in the gas hydrates to South Sea Shenhu sea area in 2017
Pilot production experiment has been carried out, the good pilot production effect of 60 days 30.9 ten thousand side's aerogenesis is obtained.This Shenhu sea area gas hydrates
It is theoretical based on three-phase control production during pilot production, real-time monitoring is carried out to silt particle, gas-liquid occuring regularity, it is therefore prevented that reservoir loses
Steady and shaft bottom screen casing erosion, therefore control of shaking out is to ensure China's Gas Hydrate In Sea Areas pilot production for the first time successfully key
One.
In general, natural gas hydrate resources reservoir buried depth itself is shallow, cementing difference, decomposition of hydrate effect leads to stratum
Cementing strength further decreases, and original weak consolidation reservoir is possibly even fully converted to quicksand formation, therefore gas hydrates
Recovery process inevitably shakes out.Japan has carried out offshore natural gas hydration in 2013 in Nankai Trough
Object pilot production is tested, and the method that bore hole outside casing gravel packing has been used in experiment carries out sand control.Testing early period in this way
(5d) achieves certain effect.But since hydrate itself occupies certain volumetric spaces in the earth formation, hydrate
Decomposition will cause stratum to generate certain deficit, and since the voltage drop method of use is exploited, it is in debt by pit shaft gradually distally
Layer is spread, and the gravel layer filled originally will occur mobile and settle, thus gravel layer also will produce certain deficit,
Cause sand control screen to be directly exposed in the space of air-liquid, sand Three-phase Flow, since flow velocity is very fast, holds very much under prevailing circumstances
Easily just make screen casing that erosion, sand control failure occur.Therefore, in hydrate industrialization process, the corrosion of shaft bottom screen casing will be one
Unavoidable project, it is preferred screen casing material, in advance progress production capacity regulation and control to be detected to the anti-erosion property of sand control sieve
Important evidence, even more ensure the sand control measure term of validity active demand.
Have research of the part about screen cutting in the environment of conventional gas and oil industry steam soak production at present, it is domestic
There is no relevant specifically for being assessed the anti-erosion property of screen casing under the aleuritic texture gas hydrates production environment of ocean
Research.Mechanical screen casing controls the key link of sand technology as shaft bottom, and the erosion resistance of wherein sieve affects the sand block of screen casing
Performance is directly related to the length of sand control life and pilot production period.Under the erosion effect of water, gas and sand Three-phase Flow, sieve
For the screen cutting problem that the net seam deformation of pipe, erosion attack rule and conventional oil gas well are faced, have it unique and
Complexity.Which kind of exploitation of gas hydrates mode no matter is taken, is likely to screen casing occur directly facing water, gas, sand three-phase
The case where stream impact, the anti-erosion property of screen casing directly affects sand block effect.
Thus, if it is possible to establish the experimental provision for meeting and simulating practical hydrate pit shaft working condition, hydrate is given birth to
It produces well screen pipe and carries out erosion process simulation flowchart, hydrate output object is to screen casing under the conditions of observing different exploitation working systems
The erosion attack process of sieve, the service life of different sand control screens, then can be exploiting ocean natural gas hydrates according to a preliminary estimate
The screen casing optimizing evaluation offer of well more fully supports, and to during practical exploitation of gas hydrates for the purpose of fluid erosion prevention
Production capacity real-time monitoring provide basic data support.
Based on above-mentioned analysis, to meet China's aleuritic texture reservoir natural gas hydrate resources industrialization development demand, for me
State's Gas Hydrate In Sea Areas test mining project screen casing preferably provides certain support with production system regulation and control, and the utility model will carry
For a kind of experimental provision that can carry out screen cutting emulation.
Utility model content
The utility model shakes out to pit shaft the active demand of control for current exploitation of gas hydrates, proposes a kind of water
It closes object recovery well machinery screen cutting and evaluates analogue system, commented for China ocean shale flour sand exploitation of gas hydrates well screen pipe
Valence is preferably and the real-time monitoring of production system provides new approaches.
The utility model is realized using technical solution below：
Analogue system is evaluated in hydrate recovery well machinery screen cutting, is 1 with practice of construction tool:1 correspondence, emulation
In experimentation, which forms a closed high-pressure recycle system, simulates maximum pressure 15MPa, meets practical gas water
Close the simulation of object reservoir pressure condition, including underground subsystem, ground subsystem and data acquisition subsystem；
The basic boom of the underground subsystem is the test well that a bite depth is 200m, disclosure satisfy that practical gas water
Close the full-scale emulation of object recovery well screen casing operating mode, including simulation wellbore hole and the simulation oil pipe, the machine that are arranged in simulation wellbore hole
Tool screen casing, mechanical screen casing plugging device, oil pipe pass through packer, air and liquid mixer, preset sand supplying device, gas separator, gas note
Enter pipeline, liquid injecting tube line and fluid infusion recoil pipeline；Blowout preventer flashboard, blowout preventer are provided at the well head of simulation wellbore hole
Gas injection tube line interface, liquid injecting tube line interface, gas output pipe interface, water sand output pipeline are installed to connect on flashboard
Mouth and fluid infusion recoil pipeline interface, and each pipe interface is equipped with corresponding gate valve；Simulate the lower end of oil pipe and mechanical screen casing phase
Even, mechanical screen casing plugging device is mounted on the bottom of mechanical screen casing；Oil pipe passes through packer setting in simulation wellbore hole and simulation oil pipe
It is formed by annular space, has the function of that oil pipe passes through, gas injection tube line and liquid injecting tube line pass through envelope across the oil pipe
It is connected with the air and liquid mixer for being fixed at simulation wellbore hole bottom every device；Preset sand supplying device setting is mixed in the gentle liquid of mechanical screen casing
Between clutch, and it is located at the lower section that oil pipe passes through packer；Gas separator setting simulation oil pipe in, be located at simulation oil pipe with
It is connect at mechanical screen casing box cupling and with simulation tubing seal, outlet end and the simulation wellbore hole and simulation oil pipe institute shape of gas separator
At annular space connection, and its communication port is located at the top that oil pipe passes through packer；Fluid infusion recoils pipeline setting in simulation oil pipe,
And its outlet is positioned at the top of gas separator；
The ground subsystem includes gas supply recycling can group, emulates water injecting tank and take sand water supply tank；Gas is supplied back to
The outlet end of closed cans group is equipped with pressure regulator valve, and is connected with the gas injection tube line interface on blowout preventer flashboard by pipeline,
The arrival end of gas supply recycling can group is equipped with check valve, and passes through the gas output pipeline on pipeline and blowout preventer flashboard
Interface is connected；The arrival end of emulation water injecting tank is connected with the online laser particle analyzer of data acquisition subsystem, outlet end and well
Liquid injecting tube line interface on mouth blowout prevention flashboard is connected；The arrival end and emulation water injecting tank for taking sand water supply tank pass through high-voltage tube
Line is connected, and is provided with counterbalance valve on high pressure line therebetween, when pressure reaches particular value in emulation water injecting tank, from
Trend takes sand water supply tank drain, realizes that emulation water injecting tank is controllably exchanged with the dynamic for taking water between sand water supply tank, takes sand moisturizing
The outlet end of case is connected by high pressure line with the fluid infusion recoil pipeline interface on blowout preventer flashboard；Gas supplies recycling can group
Gas can be stored, and gas is injected by gas injection tube line in air and liquid mixer, further, it is also possible to collect from gas point
From the gas detached in device, cycle injection is realized；Water injecting tank water filling into air and liquid mixer by liquid injecting tube line is emulated, is taken
Sand water supply tank injects liquid into the top of gas separator by fluid infusion recoil pipeline, and the sand grains that part is deposited carries logical
Cross simulation oil pipe output；
The data acquisition subsystem includes data acquisition computer and coupled online laser particle analyzer, well head
Shake out concentration measuring apparatus, pressure sensor and differential pressure pickup, and pressure sensor and differential pressure pickup are acquired with data and calculated
Machine is connected；Wherein, online laser particle analyzer and well head shake out concentration measuring apparatus setting on the ground, and the two connects in a series arrangement
Between water sand output pipe interface and emulation water injecting tank, pressure sensor includes being separately mounted to air and liquid mixer inside and machine
Pressure sensor P1 above tool screen casing plugging device and pressure sensor P2, differential pressure pickup include being separately mounted to tested machinery
The differential pressure pickup dP2 and differential pressure pickup dP2 of the upper and lower ends of screen casing, to measure screen casing both ends in erosion process simulation process
The pressure drop in interior outside；The data of the pressure sensor and differential pressure pickup are real-time transmitted to ground data by data transmission
The critical condition of erosion attack occurs for observing screen casing for collecting computer.
Further, the preset sand supplying device be cross section be circular column structure, including madial wall, lateral wall with
And upper plate and lower plate, simulated formation is filled in the ring cavity formed between madial wall and lateral wall and upper plate and lower plate
Sand；And the madial wall includes upper madial wall and lower madial wall, lateral wall includes upper lateral wall and lower lateral wall, lower madial wall and
Lower lateral wall is all made of porous web plate form design, and the aperture of the porous web plate of lower lateral wall is less than the porous web of lower madial wall
The aperture of plate, lower madial wall and lower lateral wall form the lower part perforated section of preset sand supplying device, upper madial wall and upper lateral wall composition
The aperture of the top seal section of preset sand supplying device, lower madial wall is thicker, is made with ensureing that gas-liquid will not be taken sand impact screen casing process
At blocking, and the thinner aperture of lower outer panel then ensures that the sand grains in preset sand supplying device will not return and is discharged to external air and liquid mixer
In；Gas, liquid flow through air and liquid mixer and are mixed in experimentation, then flow through preset sand supplying device, carry preset sand supplying
Simulated formation sand inside device forms radial flow, impulse machine screen casing；The special structure design of preset sand supplying device can ensure to work as
After the sand grains (simulated formation sand) of lower part prepackage carries impact screen casing and output by gas-liquid, top sand grains automatic sedimentation ensures to fill
The sand grains supply of foot, extends experimental period, guarantees the erosion process for the time observation screen casing for having sufficient.
Further, it is connected through a screw thread between the lower part perforated section and top seal section, and the height of lower part perforated section
Spend it is adjustable, by adjusting the altitude range of lower part perforated section, it may be verified that the erosion of mechanical screen casing under different shaft bottom thermally coupled flows
Service life, the regulation and control for gas hydrates pilot production shaft bottom thermally coupled flow provide constructive suggestions.
Further, the emulation water injecting tank includes a closed high pressure resistant water tank, and a water is provided on high pressure resistant water tank
Case injection hole and water tank tap are provided with sand filter and liquid level gauge, the sand filter and water in high pressure resistant water tank
Case injection hole is connected to, and water tank discharge nose end is connected with a booster pump, and is injected by the liquid on pipeline and blowout preventer flashboard
Pipeline interface is connected.
Further, the sand filter is a box typed structure, is staggeredly equipped on it, on lower two side multiple
Not contour baffle, it is parallel with the baffle and far from water tank injection hole side side on be provided with a filter screen, water sand
After mixture enters sand filter by water tank injection hole, due to the effect of not contour baffle, reduced velocity flow, sand grains silt particle mistake
It being settled in filter, last fine silt is installed in the filter screen filtering of sand filter side, realizes the separation of water sand,
And conveniently to the cleaning of sand filter.
Further, the gas injection tube line and the junction of liquid injecting tube line and air and liquid mixer are separately installed with
Check valve, check valve only allow gas and liquid to be injected into well, prevent because caused by air-liquid injection management pressure imbalance
Air water flows back.
Further, the air and liquid mixer is internally provided with distributing damper and turbine stirrer, air and liquid mixer
Radial flow ring set is provided on inner wall, air and liquid mixer is connected to preset sand supplying device, and distributing damper makes the air-liquid churning of injection arrive
In air and liquid mixer, turbine stirrer liquid injecting tube line inject water percussion under high speed rotation occurs, make gas with
Liquid is thoroughly mixed, and radial flow ring set contributes in smaller space to form uniform radial flow, and simulation process is closer
The Radial Flow process of actual formation production process.
Further, the outlet end of fluid infusion recoil pipeline is a U-bend, and opening upwards, is formed upward anti-
Bath stream prevents impact of the moisturizing recoil pipeline injection water to downhole gas separator, while ensureing preferably to take sand recoil energy
Power.
Compared with prior art, it is with good effect the advantages of the utility model：
Analogue system described in this programme is full-scale population parameter emulation, and the depth of simulation wellbore hole is 200m, Neng Gouhan
Cover the basic depth bounds of current China's Gas Hydrate In Sea Areas reservoir, simulation result is closer to site operation, simulation optimization
Obtained construction parameter result is 1 with site operation parameter:1 correspondence, simulation result are used directly for shallow layer gas
Hydrate reservoir gravel pack service, the property of can refer to are strong；And preset sand supplying device special designing on the one hand can effectively ensure that it is imitative
In the true simulated experiment period, ensures the success of erosion emulation experiment, on the other hand can pass through the porous DOOR HEIGHT of lower inside
The simulation for realizing that different shaft bottoms flow into operating mode is adjusted, foundation is provided to exploit reservoir reconstruction section for suitable hydrate；
Screen cutting and practical hydrate producing well working condition are combined initiatively, pass through pressure sensor, pressure
Gap sensor, online laser particle analyzer and the well head concentration measuring apparatus that shakes out are combined, and are realized the real-time monitoring of screen cutting situation, are led to
Erosion attack rule of the screen casing under hydrate working condition can be obtained by crossing simulated experiment, can be screen casing outer protective cover water conservancy diversion
The transformation section of the design of slot, preferred, decompression control sand scheme the indicating risk of screen casing type and storage provides data supporting, from
And Anti-erosion adaptability of the screen casing in hydrate recovery process is evaluated, control sand medium preferably and production operation decompression side for shaft bottom
The real-time monitoring of case provides foundation.
Description of the drawings
Fig. 1 is analogue system structural schematic diagram in the utility model embodiment；
Fig. 2 is that water injecting tank structural schematic diagram is emulated described in the utility model embodiment；
Fig. 3 is the preset sand supplying device schematic diagram of the utility model embodiment；
Wherein, 1, simulation wellbore hole；2, oil pipe is simulated；3, mechanical screen casing；4, gas separator；5, air and liquid mixer；6, pre-
Set sand supplying device；7, mechanical screen casing plugging device；8, liquid injecting tube line；9, gas injection tube line；10, oil pipe passes through packer；11、
Fluid infusion recoil pipeline；12, blowout preventer flashboard；13, water injecting tank is emulated；14, sand water supply tank is taken；15, online laser particle analyzer；
16, well head shakes out concentration measuring apparatus；17, gas supplies recycling can group；F1-F5, high pressure stop valve；B1, counterbalance valve；P1-P2、
Pressure sensor；DP1-dP2, differential pressure pickup；6-1, upper lateral wall；6-2, upper madial wall；6-3, lower lateral wall；6-4, it is lower in
Side wall；6-5, simulated formation sand；6-6, upper plate；13-1, closed high pressure resistant water tank；13-2, sand filter；13-3, supercharging
Pump；13-4, liquid level gauge；13-5, water tank injection hole；13-6, baffle；13-7, filter screen.
Specific implementation mode
In order to which the above objects, features, and advantages of the utility model are more clearly understood, below in conjunction with the accompanying drawings and
Embodiment is described further the utility model.It should be noted that in the absence of conflict, embodiments herein and
Feature in embodiment can be combined with each other.
Analogue system is evaluated in embodiment, hydrate recovery well machinery screen cutting, is 1 with practice of construction tool:1 corresponds to pass
It is that during emulation experiment, which forms a closed high-pressure recycle system, simulates maximum pressure 15MPa, meets practical day
The simulation of right gas hydrate reservoir pressure condition, as shown in Figure 1, including underground subsystem, ground subsystem and data acquisition
System；
The basic boom of the underground subsystem is the test well that a bite depth is 200m, disclosure satisfy that practical gas water
Close object recovery well screen casing operating mode full-scale emulation, including simulation wellbore hole 1 and be arranged in simulation wellbore hole 1 simulation oil pipe 2,
Mechanical screen casing 3, mechanical screen casing plugging device 7, oil pipe pass through packer 10, air and liquid mixer 5, preset sand supplying device 6, gas separator
4, gas injection tube line 9, liquid injecting tube line 8 and fluid infusion recoil pipeline 11；It is provided with blowout preventer at the well head of simulation wellbore hole 1
Flashboard 12 is equipped with gas injection tube line interface, liquid injecting tube line interface, gas output pipeline on blowout preventer flashboard 12 and connects
Mouth, water sand output pipe interface and fluid infusion recoil pipeline interface, and each pipe interface is equipped with corresponding gate valve (shut-off valve)；Mould
The lower end of quasi- oil pipe 2 is connected with mechanical screen casing 3, and mechanical screen casing plugging device 7 is mounted on the bottom of mechanical screen casing 3；Oil pipe passes through envelope
It is formed by annular space in simulation wellbore hole 1 and simulation oil pipe 2 every the setting of device 10, has the function of that oil pipe passes through, gas injection tube line 9
With liquid injecting tube line 8 packer 10 and the air and liquid mixer 5 for being fixed at 1 bottom of simulation wellbore hole are passed through across the oil pipe
It is connected；The preset setting of sand supplying device 6 is passed through between mechanical screen casing 3 and air and liquid mixer 5, and positioned at oil pipe under packer 10
Side；The setting of gas separator 4 in simulation oil pipe 2, be located at simulation oil pipe 2 with it is close at mechanical 3 box cupling of screen casing and with oil pipe 2 is simulated
The outlet end of envelope connection, gas separator 4 is formed by annular space and is connected to simulation wellbore hole 1 and simulation oil pipe 2, and its communication port position
The top of packer 10 is passed through in oil pipe；Fluid infusion recoils the setting of pipeline 11 in simulation oil pipe 2, and its outlet is located at gas and detaches
The top of device 4；
The ground subsystem includes gas supply recycling can group 17, emulation water injecting tank 13 and takes sand water supply tank 14；Gas
The outlet end of supply recycling can group 17 is equipped with pressure regulator valve, and passes through the gas injection tube line on pipeline and blowout preventer flashboard 12
Interface is connected, and the arrival end of gas supply recycling can group 17 is equipped with check valve, and by pipeline and blowout preventer flashboard 12
Gas output pipe interface be connected；Emulate the online laser particle analyzer 15 of the arrival end and data acquisition subsystem of water injecting tank 13
It is connected, outlet end is connected with the liquid injecting tube line interface on blowout preventer flashboard 12；Take the arrival end of sand water supply tank 14
It is connected by high pressure line with emulation water injecting tank 13, and is provided with counterbalance valve B1 on high pressure line therebetween, works as emulation
When pressure reaches particular value in water injecting tank 13,14 drain of sand water supply tank is taken from trend, emulation water injecting tank 13 is realized and takes sand moisturizing
The dynamic of water controllably exchanges between case 14, and the outlet end for taking sand water supply tank 14 passes through high pressure line and blowout preventer flashboard 12
On fluid infusion recoil pipeline interface be connected；Gas supply recycling can group 17 can store gas, and gas is injected by gas
Pipeline injects in air and liquid mixer 5, further, it is also possible to collect the gas detached from gas separator 4, realizes cycle injection；
Water injecting tank 13 is emulated by the water filling into air and liquid mixer 5 of liquid injecting tube line 8, sand water supply tank 14 is taken and is recoiled pipeline by fluid infusion
11 inject liquid into the top of gas separator 4, and the sand grains that part is deposited is carried by simulating oil pipe output；
The data acquisition subsystem includes data acquisition computer and coupled online laser particle analyzer 15, well
Mouth shakes out concentration measuring apparatus 16, pressure sensor and differential pressure pickup, and pressure sensor and differential pressure pickup are acquired with data
Computer is connected；Wherein, online laser particle analyzer 15 and well head shake out the setting of concentration measuring apparatus 16 on the ground, and the two is to connect
Mode is connected between water sand output pipe interface and emulation water injecting tank 13, and pressure sensor includes being separately mounted to gas-liquid mixed
The pressure sensor P1 and pressure sensor P2 of 7 sides, differential pressure pickup include pacifying respectively on 5 inside of device and mechanical screen casing plugging device
Mounted in the differential pressure pickup dP2 and differential pressure pickup dP2 of the upper and lower ends of tested mechanical screen casing 3, to measure erosion process emulation
In the process in screen casing both ends outside pressure drop；The data of the pressure sensor and differential pressure pickup are real-time by data transmission
It is transferred to ground data acquisition computer, the critical condition of erosion attack occurs for observing screen casing.
As shown in figure 3, it is circular column structure that the preset sand supplying device 6, which is cross section, it is the central column of height 20m
Construction, can cover the erosion experiment condition of all screen casing length (9m or 12m), including madial wall, lateral wall and upper plate
6-6 and lower plate are filled with simulated formation sand 6- in the ring cavity formed between madial wall and lateral wall and upper plate and lower plate
5；And the madial wall includes upper madial wall 6-2 and lower madial wall 6-4, lateral wall includes upper lateral wall 6-1 and lower lateral wall 6-
3, lower madial wall 6-4 and lower lateral wall 6-3 are all made of porous web plate form design, and the hole of the porous web plate of lower lateral wall 6-3
The lower part that the aperture of porous web plate of the diameter less than lower madial wall 6-4, lower madial wall and lower lateral wall form preset sand supplying device is with holes
Section, upper madial wall and upper lateral wall form the top seal section of preset sand supplying device, and the aperture of lower madial wall 6-4 is thicker, to ensure
Sand impact screen casing process will not be taken to gas-liquid to cause to stop, and the lower thinner apertures outer panel 6-3 then ensure in preset sand supplying device 6
Sand grains will not return and be discharged in external air and liquid mixer 5；Gas, liquid flow through air and liquid mixer 5 and occur to mix in experimentation
It closes, then flows through preset sand supplying device 6, carry the simulated formation sand 6-5 inside preset sand supplying device and form radial flow, impulse machine sieve
Pipe 3；The outer diameter of preset sand supplying device 6 is identical as 5 internal diameter of air and liquid mixer, internal diameter 95/8", disclosure satisfy that outer diameter is less than is 95/8”
All types of mechanical screen casings erosion process simulated experiment；The special structure design of preset sand supplying device 6 can ensure instantly
After the sand grains (simulated formation sand) of portion's prepackage carries impact screen casing and output by gas-liquid, top sand grains automatic sedimentation ensures sufficient
Sand grains supply, extend experimental period, guarantee to have the erosion process of sufficient time observation screen casing.
Moreover, connected by thread forms between the lower part perforated section and top seal section of prefabricated sand supplying device 6, and lower bands
The height of hole section is adjustable, for example, the total height of preset sand supplying device 6 is fixed, i.e. lower part perforated section and top seal section height summation
Fixed, the high degree of sequence of preferably 18m, lower part perforated section can be designed as multiple standards such as 1m, 2m, 3m ... 10m successively, corresponding
, the height of top seal section is 17m, 16m, 15m ... 8m etc., is selected according to the height of lower part perforated section in the two connection procedure
The height of top seal section is selected, and is connected through a screw thread use, and then realizes that the height of lower part perforated section is adjustable, certainly, also may be used
In a manner of using other adjustable, by adjusting the altitude range of porous web plate, it may be verified that mechanical under different shaft bottom thermally coupled flows
The erosion service life of screen casing, and then to provide constructive suggestions for the regulation and control of gas hydrates pilot production shaft bottom thermally coupled flow.
With reference to figure 2, the emulation water injecting tank includes a closed high pressure resistant water tank 13-1, is arranged on high pressure resistant water tank 13-1
There are a water tank injection hole 13-5 and water tank tap, sand filter 13-2 and liquid level gauge are provided in high pressure resistant water tank 13-1
13-4, the sand filter 13-2 are connected to water tank injection hole 13-5, and the bottom surface of high pressure resistant water tank 13-1 is arcuate structure, water
Case tap is arranged in least significant end, and water tank tap is connected with a booster pump 13-3, and passes through pipeline and blowout preventer flashboard 12
On liquid injecting tube line interface be connected.Wherein sand filter 13-2 is a box typed structure, and on it, lower two side submits
Mistake is provided with multiple not contour baffle 13-6, and parallel with the baffle 13-6 and side far from water tank injection hole side is arranged
There is a filter screen 13-7, after water sand mixture enters sand filter 13-2 by water tank injection hole, due to not contour baffle
The effect of 13-6, reduced velocity flow, sand grains sand filter is interior to be settled, and last fine silt is installed in sand filter side
The filter screen 13-7 filterings in face, realize the separation of water sand, and conveniently to the cleaning of sand filter.
In the present embodiment, the air and liquid mixer 5 is internally provided with distributing damper and turbine stirrer, air and liquid mixer
Radial flow ring set is provided on 5 inner wall, air and liquid mixer is connected to preset sand supplying device, and distributing damper makes the air-liquid of injection revolve
It is sprayed onto in air and liquid mixer, under the percussion that liquid injecting tube line injects water high speed rotation occurs for turbine stirrer, makes gas
Body is thoroughly mixed with liquid, and radial flow ring set contributes in smaller space to form uniform radial flow, and simulation process is more
Close to the Radial Flow process of actual formation production process；Moreover, the gas injection tube line 9 and liquid injecting tube line 8 and gas
The junction of liquid mixer 5 is separately installed with check valve, and check valve only allows gas and liquid to be injected into well, prevent because
Air water caused by air-liquid injection management pressure imbalance flows back；In addition, moisturizing recoil pipeline injects water to downhole gas in order to prevent
The impact of body separator, while ensureing preferably to take sand back flushing capability, the outlet end of the fluid infusion recoil pipeline 11 is a U-bend
Pipe, and opening upwards, form upward recoil flow.
The analogue system that the present embodiment proposes emulates for full-scale population parameter, in conjunction with to preset sand supplying device, emulation water injecting tank
Isostructural special adaptations design, creative for the first time is combined screen cutting and practical hydrate producing well working condition,
By the pressure sensor, differential pressure pickup, online laser particle analyzer, well head shake out concentration measuring apparatus joint, realize sieve
The real-time monitoring of pipe erosion situation can control sand side for the design of screen casing outer protective cover diversion trench, preferred, the decompression of screen casing type
The indicating risk of case and the transformation section of storage provide data supporting, and can adjust pipe string combination in pipe according to actual conditions,
Suitable for different casing programmes, there is extensive practical value and research significance.
For the clearer implementation principle for understanding analogue system described in this programme, specific Jie is done to applying method in fact below
It continues, includes the following steps：
A, ground subsystem, underground subsystem and data acquisition subsystem are connected, by emulating water injecting tank to internal system
(15MPa) is suppressed, and is kept for a period of time, verifies system sealing；
B, the emulation of mechanical picker plumber's condition is carried out, is specifically included：
B1. start emulation water injecting tank and gas is supplied back to closed cans group, control certain gas liquid ratio and gas-liquid injection flow, liquid
Body and gas are injected from liquid injecting tube line, gas injection tube line in air and liquid mixer respectively；
B2. air-liquid is sufficiently mixed by air and liquid mixer, through under preset mulling case simulating hydrate working condition to mechanical picker
The erosion process of pipe：After gas-liquid sand three-phase impulse machine screen casing wall surface, part silt particle is deposited in mechanical screen casing periphery, remaining
Silt particle particle then penetrates mechanical screen casing with gas-liquid, migrates into mechanical screen casing inside and upwards, by gas separator；
B3. by the gas after gas separator by the annular space output between simulation oil pipe and simulation wellbore hole, and by gas
Body supplies recycling can group and collects to recycle；Water, sand mixture of output are via simulation oil pipe output during this；
B4. while step B3 is carried out, pipeline is recoiled to noting inside the simulation oil pipe above gas separator by fluid infusion
Enter water, ensures that silt particle can smoothly be discharged；
C, it acquires in real time and in the entire implementation processes of recording step B, pressure sensor, swashs at differential pressure pickup data online
Light particle size analyzer data and well head shake out concentration measuring apparatus data, carry out continuing erosion experiment, be judged based on pressure sensor variation
The crash time point of erosion occurs for mechanical screen casing, judges that the position of erosion, observation sieve occur for mechanical screen casing based on differential pressure pickup
Crash time point, the preferential position that erosion occurs and the degree that erosion occurs of erosion occur for pipe；
Specifically, judging that the basic principle for the crash time point that erosion occurs for mechanical screen casing is based on pressure sensor：By
It is totally-enclosed system in the test system, under gas-liquid injection pressure certain condition, the blocking process of mechanical screen casing is to gradually change
, if the unexpected wide fluctuations (decline) that borehole pressure counts occur in sometime point, illustrate mechanical screen casing quilt
It punches, that is, erosion has occurred.
Judge that the basic principle that the position of erosion occurs for screen casing is based on differential pressure pickup：Gas-liquid injection pressure certain condition
Under, the blocking process of mechanical screen casing gradually changes, therefore the external and internal pressure difference of mechanical screen casing is also one and gradually changes
Process, when screen casing is after erosion attack occurs for some location point, the inside and outside differential pressure of the point fluctuates rapidly (decline), and other positions
Then there are one time lags for the pressure-difference fluctuation of point, therefore can judge that erosion occurs for mechanical screen casing with this time lag relationship
Rough location.Based on the above pressure sensor with the cooperation of differential pressure pickup, realize that screen cutting time to rupture and erosion are broken
The comprehensive analysis of bad position.
When screen cutting extent of the destruction is smaller, only sieve can not be accurately detected from above-mentioned pressure sensor and differential pressure pickup
There is a situation where erosions for pipe, and the concentration measuring apparatus that can be shaked out at this time according to surface-based online laser particle analyzer, well head is sentenced
Disconnected erosion degree, the liquid that concentration measuring apparatus measurement obtains if granularity or well head that online laser particle analyzer measurement obtains are shaked out
In silt concertation occur suddenly fluctuation, illustrate that erosion attack has occurred in mechanical screen casing sand block medium, according to fluctuation size judge
The size of the erosion degree of screen casing；That is in the simulation erosion process of mechanical screen casing, mechanical screen casing can stop centainly
The reservoir sand of grain size enters in mechanical screen casing, and when erosion attack occurs for screen casing, net seam can occur to destroy and expand, and allow bigger
The sand grains of grain size enters in screen casing；The grain size that output sand is analyzed by echo solid concentration analyzer and online laser particle analyzer becomes
Change, if particle size values gradually increase, may determine that and erosion attack has occurred, by comparing the time and punching that erosion attack occurs
The degree of destruction is lost to compare the anti-erosion property of screen casing, is thus preferably suitable for the sand screen of gas hydrates producing well
Pipe；
D, mechanical screen cutting operating mode assessment is carried out, emulation is terminated.
For above-mentioned emulation test method, in the step D, when assessing mechanical screen cutting operating mode, may be used also
With including any one or more in following several situations：
D1. the mechanical screen casing with different screen casing outer protective covers is replaced, step A-C is executed, by comparing different mechanical pickers
The reasonability of pipe outer protective cover diversion Design, the design for suitable screen casing outer protective cover diversion trench provide foundation；As first, second,
The third three kinds of mechanical screen casings, sand block sieve is uniform type inside mechanical screen casing, and analogue simulation operating mode is consistent, if mechanical screen casing first
The time that erosion attack occurs is shorter, then illustrates that the kuppe design of first screen casing is unreasonable, carried out again from second third preferably, thus
Design for suitable screen casing outer protective cover diversion trench provides foundation；
D2. different types of mechanical screen casing is replaced, step A-C is executed, by the service life for comparing different mechanical screen casings
Difference, preferably best Anti-erosion screen casing preferably provides foundation for screen casing needed for best scene；Such as first, second, the third three kinds of machineries
Screen casing, mechanical screen construction is consistent but material is different, if the time of mechanical screen casing first generation erosion attack is shorter and rushes
Lose extent of the destruction it is larger, then illustrate that first screen casing is not suitable for gas hydrates production status, carried out again from second third preferably, from
And it is that screen casing needed for best scene preferably provides foundation；
D3. the simulated formation sand in preset sand supplying device is replaced, different simulated formation sand is emulated, executes step A-
C is carried by the mechanical screen casing service life under the different formation condition of contrast verification for gas hydrates pilot production cycle evaluation
For support；Such as first, second, the third three kinds of reservoir sands, same mechanical screen casing is simulated under identical analogue simulation working condition,
If reservoir sand first preferentially causes mechanical screen casing that erosion attack occurs, illustrating should be as far as possible in practical hydrate recovery process
The sandy mobile of the size is controlled to shaft bottom, to provide foundation for the control adjustment of rational decompression approach；
D4. the height for controlling to adjust the lower part perforated section of preset sand supplying device, under the conditions of verifying different shaft bottom thermally coupled flows
The erosion service life of mechanical screen casing, the regulation and control for gas hydrates pilot production shaft bottom thermally coupled flow provide suggestion；Such as first, second, the third three
The different preset porous DOOR HEIGHT of sand supplying device lower inside of kind carries out erosion using identical operating mode to same class machinery screen casing
Emulation illustrates that first operating mode is unfavorable for prolonged mechanical screen casing and makes if porous web plate first preferentially causes screen casing that erosion attack occurs
It with the period, is carried out again from second third preferably, foundation is provided to exploit reservoir reconstruction section for suitable hydrate.
In short, the screen casing paranorm of different screen cutting characteristics under different working conditions can be carried out using the analogue system
It is quasi-, the erosion attack time point of screen casing is observed, and evaluate the service life of screen casing, the sand term of validity is controlled in prediction shaft bottom；Detect screen casing
Anti-erosion property under different working conditions is decompression conceptual design, the storage transformation of practical exploitation of gas hydrates well
Range optimization provide support to erosion attack process of screen casing under the conditions of hydrate reservoir water, gas, sand three-phase occuring regularity into
Row monitoring in real time, to evaluate Anti-erosion adaptability of the screen casing in hydrate recovery process, for shaft bottom control sand medium preferably and
The real-time monitoring that production operation is depressured scheme provides foundation.
The above descriptions are merely preferred embodiments of the present invention, is not to make other forms to the utility model
Limitation, any person skilled in the art is changed or is modified as possibly also with the technology contents of the disclosure above equivalent
The equivalent embodiment of variation is applied to other fields, but every without departing from the content of the technical scheme of the utility model, according to this reality
With novel technical spirit to any simple modification, equivalent variations and remodeling made by above example, it is new to still fall within this practicality
The protection domain of type technical solution.
Claims (8)
- It is 1 with practice of construction tool 1. analogue system is evaluated in hydrate recovery well machinery screen cutting:1 correspondence, feature It is, including underground subsystem, ground subsystem and data acquisition subsystem；The underground subsystem includes simulation wellbore hole and the simulation oil pipe being arranged in simulation wellbore hole, mechanical screen casing, mechanical picker Pipe plugging device, oil pipe pass through packer, air and liquid mixer, preset sand supplying device, gas separator, gas injection tube line, liquid note Enter pipeline and fluid infusion recoil pipeline；It is provided with blowout preventer flashboard at the well head of simulation wellbore hole, is equipped on blowout preventer flashboard Gas injection tube line interface, liquid injecting tube line interface, gas output pipe interface, water sand output pipe interface and fluid infusion recoil Pipeline interface, and each pipe interface is equipped with corresponding gate valve；The lower end for simulating oil pipe is connected with mechanical screen casing, mechanical screen casing envelope Stifled device is mounted on the bottom of mechanical screen casing；Oil pipe passes through packer setting and is formed by annular space in simulation wellbore hole and simulation oil pipe In, gas injection tube line and liquid injecting tube line pass through packer across the oil pipe and are fixed at simulation wellbore hole bottom Air and liquid mixer is connected；Preset sand supplying device setting passes through packer between the gentle liquid mixer of mechanical screen casing, and positioned at oil pipe Lower section；Gas separator setting in simulation oil pipe, be located at simulation oil pipe with it is close at mechanical screen casing box cupling and with oil pipe is simulated The outlet end of envelope connection, gas separator is formed by annular space and is connected to simulation wellbore hole and simulation oil pipe；Fluid infusion recoil pipeline is set It sets in simulation oil pipe, and its outlet is positioned at the top of gas separator；The ground subsystem includes gas supply recycling can group, emulates water injecting tank and take sand water supply tank；Gas supplies recycling can The outlet end of group is equipped with pressure regulator valve, and is connected with the gas injection tube line interface on blowout preventer flashboard by pipeline, gas The arrival end of supply recycling can group is equipped with check valve, and passes through the gas output pipe interface on pipeline and blowout preventer flashboard It is connected；The arrival end of emulation water injecting tank is connected with the online laser particle analyzer of data acquisition subsystem, and outlet end is anti-with well head Liquid injecting tube line interface on spray flashboard is connected；The arrival end and emulation water injecting tank for taking sand water supply tank pass through high pressure line phase Even, and it is provided with counterbalance valve on high pressure line therebetween, the outlet end for taking sand water supply tank passes through high pressure line and well head Fluid infusion recoil pipeline interface on blowout prevention flashboard is connected；Emulation water injecting tank is noted by liquid injecting tube line into air and liquid mixer Water takes the top that sand water supply tank injects liquid into gas separator by fluid infusion recoil pipeline, the sand grains that part is deposited By simulating oil pipe output；The data acquisition subsystem includes that data acquisition computer and coupled online laser particle analyzer, well head shake out Concentration measuring apparatus, pressure sensor and differential pressure pickup, pressure sensor and differential pressure pickup with data acquisition computer phase Even；Wherein, online laser particle analyzer and well head shake out concentration measuring apparatus setting on the ground, and the two is connected to water in a series arrangement Between sand output pipe interface and emulation water injecting tank, pressure sensor includes being separately mounted to air and liquid mixer inside and mechanical picker Pressure sensor P1 above pipe plugging device and pressure sensor P2, differential pressure pickup include being separately mounted to tested mechanical screen casing Upper and lower ends differential pressure pickup dP2 and differential pressure pickup dP2.
- 2. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 1, which is characterized in that described Preset sand supplying device is the column structure that cross section is annular shape, including madial wall, lateral wall and upper plate and lower plate, inside Simulated formation sand is filled in the ring cavity formed between wall and lateral wall and upper plate and lower plate；And the madial wall includes upper Madial wall and lower madial wall, lateral wall include upper lateral wall and lower lateral wall, and lower madial wall and lower lateral wall are all made of porous web Plate, and the aperture of the porous web plate of lower lateral wall is less than the aperture of the porous web plate of lower madial wall, lower madial wall and lower lateral wall The lower part perforated section of preset sand supplying device is formed, upper madial wall and upper lateral wall form the top seal section of preset sand supplying device.
- 3. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 2, which is characterized in that described It is connected through a screw thread between lower part perforated section and top seal section, and the height of lower part perforated section is adjustable.
- 4. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 2 or 3, which is characterized in that The emulation water injecting tank includes a closed high pressure resistant water tank, and a water tank injection hole and water tank discharge are provided on high pressure resistant water tank Hole is provided with sand filter and liquid level gauge in high pressure resistant water tank, and the sand filter is connected to water tank injection hole, water tank row Go out nose end and be connected with a booster pump, and is connected with the liquid injecting tube line interface on blowout preventer flashboard by pipeline.
- 5. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 4, which is characterized in that described Sand filter is a box typed structure, multiple not contour baffles is staggeredly equipped on it, on lower two side, with the gear Plate is provided with a filter screen on parallel and side far from water tank injection hole side.
- 6. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 5, which is characterized in that described Gas injection tube line and the junction of liquid injecting tube line and air and liquid mixer are separately installed with check valve.
- 7. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 6, which is characterized in that described Air and liquid mixer is internally provided with distributing damper and turbine stirrer, and radial flow ring is provided on the inner wall of air and liquid mixer Set, air and liquid mixer are connected to preset sand supplying device, and distributing damper makes in the air-liquid churning to air and liquid mixer of injection, and turbine stirs It mixes device and high speed rotation occurs under the percussion that liquid injecting tube line injects liquid, gas is made to be thoroughly mixed with liquid, Radial flow ring set ensures to form uniform radial flow when gas-liquid enters in preset sand supplying device.
- 8. analogue system is evaluated in hydrate recovery well machinery screen cutting according to claim 7, which is characterized in that described The recoil outlet end of pipeline of fluid infusion is a U-bend, and opening upwards.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721643375.5U CN207623167U (en) | 2017-11-30 | 2017-11-30 | Analogue system is evaluated in hydrate recovery well machinery screen cutting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721643375.5U CN207623167U (en) | 2017-11-30 | 2017-11-30 | Analogue system is evaluated in hydrate recovery well machinery screen cutting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843513A (en) * | 2017-11-30 | 2018-03-27 | 青岛海洋地质研究所 | Analogue system and its emulation test method are evaluated in the screen cutting of hydrate recovery well machinery |
| CN108982342A (en) * | 2018-07-20 | 2018-12-11 | 中海石油(中国)有限公司湛江分公司 | A kind of high temperature and pressure Horizontal Wells For Gas Reservoirs sand control screen anti-erosion property evaluating apparatus and evaluation method and application |
| CN112177571A (en) * | 2019-06-14 | 2021-01-05 | 中国石油化工股份有限公司 | Reservoir deficit sand control well gravel packing degree simulation experiment device and method |
| CN113187462A (en) * | 2021-03-25 | 2021-07-30 | 中国石油大学(华东) | Evaluation method for erosion damage risk of screen pipe of sand-proof well completion of natural gas well |
-
2017
- 2017-11-30 CN CN201721643375.5U patent/CN207623167U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843513A (en) * | 2017-11-30 | 2018-03-27 | 青岛海洋地质研究所 | Analogue system and its emulation test method are evaluated in the screen cutting of hydrate recovery well machinery |
| CN107843513B (en) * | 2017-11-30 | 2023-11-24 | 青岛海洋地质研究所 | Simulation system and simulation test method for erosion evaluation of mechanical sieve tube of hydrate exploitation well |
| CN108982342A (en) * | 2018-07-20 | 2018-12-11 | 中海石油(中国)有限公司湛江分公司 | A kind of high temperature and pressure Horizontal Wells For Gas Reservoirs sand control screen anti-erosion property evaluating apparatus and evaluation method and application |
| CN108982342B (en) * | 2018-07-20 | 2021-11-09 | 中海石油(中国)有限公司湛江分公司 | Device and method for evaluating erosion resistance of sand control screen pipe of high-temperature high-pressure gas reservoir horizontal well and application of device and method |
| CN112177571A (en) * | 2019-06-14 | 2021-01-05 | 中国石油化工股份有限公司 | Reservoir deficit sand control well gravel packing degree simulation experiment device and method |
| CN113187462A (en) * | 2021-03-25 | 2021-07-30 | 中国石油大学(华东) | Evaluation method for erosion damage risk of screen pipe of sand-proof well completion of natural gas well |
| CN113187462B (en) * | 2021-03-25 | 2023-02-24 | 中国石油大学(华东) | Evaluation method for erosion damage risk of screen pipe of sand-proof well completion of natural gas well |
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