CN208950575U - A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system - Google Patents
A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system Download PDFInfo
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- CN208950575U CN208950575U CN201821779524.5U CN201821779524U CN208950575U CN 208950575 U CN208950575 U CN 208950575U CN 201821779524 U CN201821779524 U CN 201821779524U CN 208950575 U CN208950575 U CN 208950575U
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Abstract
The utility model discloses a kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressures to monitor system, including hydraulic pressure controller and the output device being connected with measuring device；Measuring device includes pedestal, and shell is equipped on the pedestal, and shell cavity is hollow structure, and cavity is divided into bigger diameter end and miner diameter end；It is provided with lower piston in miner diameter end, upper piston is provided in bigger diameter end, bigger diameter end bottom sidewall offers gas vent, and upper cover is provided at the top of bigger diameter end, is full of hydraulic oil in bigger diameter end；Exhaust-valve, pressure sensor core connector and pressure output end connector are provided on upper lid；Output device includes the pressure sensor core being installed in pressure sensor core connector.The utility model detects entire test using well head pressure data, using well head pressure data can etiologic diagnosis shaft bottom flow regime, not only have the characteristics that intuitive, simplicity, economically feasible are increased economic efficiency furthermore, it is possible to greatly shorten the testing time.
Description
Technical field
The utility model relates to oil-gas field development oil and gas well testing field more particularly to a kind of gas well flowing bottomhole pressure (FBHP)s with surging
Pressure monitor system.
Background technique
In gas well liquid loading network analysis, gas pressure and flowing bottomhole pressure (FBHP) are highly important data.Flow into the oil in shaft bottom
Gas is exactly ground to be given rise to by bottom pressure, therefore bottom pressure is the important symbol of oil/gas well self-spray capacity of water.Obtain this
The approach of a little data, first is that tripping in pressure bomb is surveyed；Second is that being calculated by well head pressure.For some high-pressure gas wells, have
When be difficult to carry out the operation of lower pressure gauge.Pressure bomb is closed, well head pressure is high, and it is bad that the sealing on lubricator is easy thorn；Production
When tolerance it is too big, pressure gauge goes down, or even causes a variety of accidents.In view of such circumstances, except underground hydrops excessively must under
Pressure bomb actual measurement is outer, and dry gas well is typically all to calculate gas pressure and bottom pressure according to well-head pressure-measuring.Gas well is unstable
The well-logging method that well testing is gas field exploration, is widely used in exploitation, it, which mainly passes through, changes gas well working system, in shaft bottom and
Gas reservoir causes stress disturbance, may determine that the property of well and gas reservoir by analyzing.The variation of this bottom pressure is tested, ground is straight
Reading is a set of more advanced, more intuitive monitoring technology, since the technical requirement precision is high, equipment is huge, testing expense is high,
Currently, can only be used on emphasis well, exceptional well.Conventional Gas well test is with guiding principle silk tool measuring under pressure gauge to shaft bottom
The variation of pressure, this method cannot grasp the variation of flowing bottomhole pressure (FBHP) in time, the time that empirical estimating radial flow can only be leaned on to occur,
Especially for new prospect pit area, it more difficult to accurate estimation.
Utility model content
In view of the foregoing drawbacks or insufficient, the purpose of this utility model is to provide a kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressures
Monitoring system, the signal for transmitting out by the hydraulic pressure controller of well head, is calculated analytically and obtains shaft bottom flow regime
Pressure value, thus instruct test produce.
To achieve the above objectives, the technical solution of the utility model are as follows:
A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitors system, including hydraulic pressure controller and with measuring device phase
The output device of connection；The measuring device includes pedestal, and shell is equipped on the pedestal, and the shell cavity is hollow knot
Structure, the miner diameter end that the cavity is divided into bigger diameter end and is connected with pedestal；Wherein, moveable lower work is provided in miner diameter end
It fills in, moveable upper piston is provided in bigger diameter end, bigger diameter end bottom sidewall offers gas vent, is provided at the top of bigger diameter end
Lid, bigger diameter end is interior to be full of hydraulic oil；Exhaust-valve, pressure sensor core connector and pressure output termination are provided on upper lid
Head；Output device includes the pressure sensor core being installed in pressure sensor core connector, the pressure sensor core
Output end be connected with A/D converter and display.
The lower piston is installed in miner diameter end cavity, and passes through retainer ring spacing, lower piston and miner diameter end cavity radial direction
Between there are movement clearances.
The exhaust-valve, pressure sensor core connector and pressure output end connector are arranged circumferentially on upper lid.
The pressure gauge that pressure value is shown in 360 ° is installed on the pressure output end connector.
The pressure sensor core is installed in pressure sensor core connector, and pressure is equipped on pressure sensor core
Lid, pressure sensor core connector outside connect A/D converter, the analog signal that core exports are converted to digital signal, institute
It states digital signal and flowing bottomhole pressure (FBHP) value is obtained by processing, and be shown on pressure gauge.
Compared with the prior art, the utility model has the following beneficial effects:
The utility model provides a kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system, is controlled by hydraulic pressure
Device can convert pressure value, by the different piston of two sizes, high pressure values are converted to low pressure values, are passed through
Mud pressure value in casing, standpipe is transmitted to pressure gauge in control cabinet disk by transmission medium hydraulic oil and shown by hydraulic oil
Show, higher mud pressure accurately can be converted into low voltage value and shown so that in drilling operation course, both guaranteed safety,
It is high-quality, efficiently implement, and be conducive to protection petroleum resources, improve recovery ratio, the utility model using well head pressure data to whole
A test is detected, using well head pressure data can etiologic diagnosis shaft bottom flow regime, using well head pressure monitoring technology, no
Only have the characteristics that intuitive, easy, economically feasible is increased economic efficiency furthermore, it is possible to greatly shorten the testing time.
Detailed description of the invention
Fig. 1 is utility model device structural schematic diagram；
Fig. 2 is the utility model upper cover cross-sectional view；
Fig. 3 is the utility model upper cover top view；
Fig. 4 is the utility model pressure sensor core connector schematic diagram；
Fig. 5 is the utility model monitoring gas well flowing bottomhole pressure (FBHP) hydraulic pressure controller system circuit diagram.
In figure: 1, shell, 2, lower piston, 3, upper piston, 4, hydraulic oil, 5, upper cover, 6, pressure sensor core, 7, emptying
Valve, 8, pedestal, 9, gas vent, 10, pressure output end connector, 3-1, pressure sensor core, 3-2, gland.
Specific embodiment
The utility model is described in detail below in conjunction with attached drawing, it is clear that described embodiment is only that this is practical
Novel a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, belongs to the protection model of the utility model
It encloses.
As shown in Figure 1, the utility model provides a kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system, including surge
Pressure controller and the output device being connected with measuring device；The measuring device includes pedestal 8, is pacified on the pedestal 8
Equipped with shell 1,1 cavity of shell is hollow structure, the path that the cavity is divided into bigger diameter end and is connected with pedestal 8
End；Wherein, it is provided with moveable lower piston 2 in miner diameter end, moveable upper piston 3, bigger diameter end bottom are provided in bigger diameter end
Portion's side wall offers gas vent 9, and upper cover 5 is provided at the top of bigger diameter end, is full of hydraulic oil 4 in bigger diameter end；The row of being provided in upper cover 5
Empty valve 7, pressure sensor core connector 6 and pressure output end connector 10；Output device includes being installed on pressure sensor core
Pressure sensor core 3-1 in body connector 6, the output end of the pressure sensor core 3-1 be connected with A/D converter and
Display.The pressure gauge that pressure value is shown in 360 ° is installed on the pressure output end connector 10, is used for real-time monitoring well head
Pressure value, the pressure value and finally obtained gas well flowing bottomhole pressure (FBHP) provide data jointly for oil and gas well testing and support.Hydraulic oil 4 is
10# aircraft fluid.
Specifically, the lower piston 2 is installed in miner diameter end cavity, and passes through retainer ring spacing, lower piston 2 and miner diameter end chamber
There are movement clearances between body radial direction.
As shown in Figure 2,3, there are three delivery outlets, three delivery outlets to be arranged circumferentially in upper cover 5, a screw thread for upper end 5
Connector is for installing exhaust-valve 7, and second threaded connection mouth is for installing pressure sensor core 3-1, the last one screw thread
Connector is directly connected in 360 ° of display output pressure values by quick coupling (instrument actual displayed is well head pressure value).Pressure passes
The pressure value dress that sensor core mouth is exported by hydraulic pressure controller is changed to two path signal (analog voltage millivolt signal), leads to
Crossing A/D converter becomes digital signal for analog signal.The electric signal (digital signal) can be with by bottom-hole pressure unit
Obtain bottom hole flowing pressure, it can be with the flowing pressure value in real-time display gas well shaft bottom finally by digital precision pressure meter.
As shown in figure 4, the pressure sensor core 3-1 is installed in pressure sensor core connector 6, pressure sensor
Gland 3-2 is installed on core 3-1, connects A/D converter on the outside of pressure sensor core 3-1 connector, the mould that core is exported
Quasi- signal is converted to digital signal, and the digital signal obtains flowing bottomhole pressure (FBHP) value by processing, and is shown on pressure gauge.
The resistance variations of foil gauge are converted into voltage change with electric-bridge circuit.Due to straining the output signal pole of bridge
It is weak, it also needs that signal is further amplified to by amplifier and is carried out some necessary compensation.Signal amplifies mode can be using straight
Big or exchange amplification is banished, DC power supply or AC power source power supply also just correspondingly can be used in strain bridge.The bridge of sensor
Rated output voltage is generally several millivolts to tens of millivolts.Therefore it also needs to be shown and recorded again after being amplified.For answering
With more direct-current bridge, the integrated transporting discharging of low drifting is mostly used to constitute the dc amplifier of zero point and adjustable gain, and usually
DC voltage amplification is carried out using differential input mode.In addition, to improve electric bridge stabilizing and performance, it is also necessary at the beginning of setting up bridge
The adjunct circuits such as beginning balance calibration and compensation.As shown in figure 5, strain transducer bridge circuit, which provided a variety of compensation and
Adjust circuit.Wherein R1~R4 is that foil gauge forms electric bridge；Ri is for adjusting electric bridge input impedance；The adjustable electric bridge output of Ra
Impedance；It is thermo-compensator in A frame；Zero adjustment circuit is provided in B frame；Ret collectively forms output adjustment in C frame and A frame
Resistance；Circuit is calibrated for two sets of initial balances in D frame, Wz1, Rz constitute direct current initial zero setting circuit, and Wz2, Cz are used for alternating current
Initially (AC phases zeroing) is returned to zero when bridge.
The utility model monitoring process are as follows:
1), the high-voltage value of well head is converted to by hydraulic pressure controller system by hydraulic pressure controller controllable
Low voltage value；
Since the environment in well is complicated, it may appear that situations such as instantaneous pressure, to guarantee that well pressure control system obtains safety,
High-voltage value can be converted to low voltage value in internal system design and obtain no-load voltage ratio hydraulic pressure controller.The hydraulic pressure controller can
High-voltage value is converted into low voltage value.
2), low voltage value passes through the pressure gauge real-time monitoring well head pressure value installed on pressure output end connector 10, meanwhile, it is low
The analog signal that core exports is converted to digital signal by pressure sensor core 3-1 by pressure value, and the digital signal passes through
Processing obtains flowing bottomhole pressure (FBHP) value, and is shown on pressure gauge.
Well head pressure display above hydraulic pressure sensor directly exports the pressure that a no-load voltage ratio pressure value is shown in 360 °
On power table, it is used for real-time monitoring well head pressure value, the pressure value and finally obtained gas well flowing bottomhole pressure (FBHP) to be that oil/gas well is surveyed jointly
Examination provides data and supports.
Specifically, the analog signal that core exports is converted to number by pressure sensor core 3-1 by the low voltage value
Signal, the digital signal obtains flowing bottomhole pressure (FBHP) value by processing, and is shown on pressure gauge and includes:
2.1, the resistance variations of foil gauge are converted into voltage value by electric-bridge circuit by pressure sensor core 3-1；
2.2, by voltage change, flowing bottomhole pressure (FBHP) value is calculated；
For a bite gas-producing well, under the conditions of single-phase, constant temperature and steady flow, energy is provided according to the first law of thermodynamics
Conservation equation, is really the state equation of gas, to write out gas flow and ground standard condition gas flow under wellbore conditions
Relational expression, and think gas under the conditions of ability organ steady flow, it can be deduced that the pass of bottom hole flowing pressure and well head pressure
It is formula:
Wherein, the relational expression of the pressure value of the bottom hole flowing pressure and well head:
Average gas deviation factor in Z-pit shaft；D-gas production bore, cm；
Gas flow under the conditions of Q-ground standard, 104M3/d；
Pwf- bottom hole flowing pressure, MPa；Psc- ground standard pressure, MPa；
Pwh- well head pressure, MPa；F-zero dimension coefficient of frictional resistance.
γg- gas density；Mean gas temperature in T-pit shaft, K；
L-well depth, m.
Working principle of the utility model is:
A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitors system and the high-voltage value of well head is passed through hydraulic pressure control first
Device system is converted to controllable low voltage value.There are three delivery outlets, respectively exhaust-valve, well head for hydraulic pressure controller system upper end
Reference pressure value output, the output of well head pressure electric signal.Wherein exhaust-valve is for use when filling 10# aircraft fluid, it is therefore an objective to
There is bubble in oil-filled cavity in order to prevent, influences hydraulic pressure precision of fuzzy controller；Well head normal pressure output valve is by well head
Pressure is by detecting well head pressure value in real time at pressure gauge display；Well head pressure telecommunications output valve, mainly passes through pressure
Pressure signal is converted to analog electrical signal by force snesor, by an A/D converter, converts analog signals into digital letter
Number.Digital signal passes through bottom-hole pressure unit, it can be deduced that flowing bottomhole pressure (FBHP).Two groups of flowing bottomhole pressure (FBHP) value, well head pressure value numbers
According to.
It is obvious to a person skilled in the art that will appreciate that above-mentioned Concrete facts example is the preferred of the utility model
Scheme, therefore improvement, the variation that those skilled in the art may make certain parts in the utility model, embodiment
It is still the principles of the present invention, realization is still the purpose of this utility model, belongs to the range that the utility model is protected.
Claims (5)
1. a kind of gas well flowing bottomhole pressure (FBHP) with hydraulic pressure monitor system, which is characterized in that including hydraulic pressure controller and with
The output device that measuring device is connected；The measuring device includes pedestal (8), is equipped with shell (1) on the pedestal (8),
Shell (1) cavity is hollow structure, the miner diameter end that the cavity is divided into bigger diameter end and is connected with pedestal (8)；Wherein,
It is provided in miner diameter end moveable lower piston (2), moveable upper piston (3), bigger diameter end bottom side is provided in bigger diameter end
Wall offers gas vent (9), is provided with upper cover (5) at the top of bigger diameter end, is full of hydraulic oil (4) in bigger diameter end；Upper cover is arranged on (5)
There are exhaust-valve (7), pressure sensor core connector (6) and pressure output end connector (10)；Output device includes being installed on pressure
The output end of pressure sensor core (3-1) in force snesor core connector (6), the pressure sensor core (3-1) connects
It is connected to A/D converter and display.
2. gas well flowing bottomhole pressure (FBHP) according to claim 1 monitors system with hydraulic pressure, which is characterized in that the lower piston
(2) it is installed in miner diameter end cavity, and by retainer ring spacing, there are between movement between lower piston (2) and miner diameter end cavity radial direction
Gap.
3. gas well flowing bottomhole pressure (FBHP) according to claim 1 monitors system with hydraulic pressure, which is characterized in that the exhaust-valve
(7), pressure sensor core connector (6) and pressure output end connector (10) are arranged circumferentially on upper cover (5).
4. gas well flowing bottomhole pressure (FBHP) according to claim 1 or 3 monitors system with hydraulic pressure, which is characterized in that the pressure
The pressure gauge that pressure value is shown in 360 ° is installed on power output end connector (10).
5. gas well flowing bottomhole pressure (FBHP) according to claim 1 monitors system with hydraulic pressure, which is characterized in that the pressure passes
Sensor core (3-1) is installed in pressure sensor core connector (6), is equipped with gland (3- on pressure sensor core (3-1)
2) A/D converter, is connected on the outside of pressure sensor core (3-1) connector, and the analog signal that core exports is converted into digital letter
Number, the digital signal obtains flowing bottomhole pressure (FBHP) value by processing, and is shown on pressure gauge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821779524.5U CN208950575U (en) | 2018-10-31 | 2018-10-31 | A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821779524.5U CN208950575U (en) | 2018-10-31 | 2018-10-31 | A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162705A (en) * | 2018-10-31 | 2019-01-08 | 秦川机床集团宝鸡仪表有限公司 | A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system and its monitoring method |
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2018
- 2018-10-31 CN CN201821779524.5U patent/CN208950575U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162705A (en) * | 2018-10-31 | 2019-01-08 | 秦川机床集团宝鸡仪表有限公司 | A kind of gas well flowing bottomhole pressure (FBHP) hydraulic pressure monitoring system and its monitoring method |
| CN109162705B (en) * | 2018-10-31 | 2023-10-03 | 秦川机床集团宝鸡仪表有限公司 | Hydraulic pressure monitoring system for bottom hole flow pressure of gas well and monitoring method thereof |
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