CN106555583B - A kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device and method - Google Patents
A kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device and method Download PDFInfo
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- CN106555583B CN106555583B CN201611023816.1A CN201611023816A CN106555583B CN 106555583 B CN106555583 B CN 106555583B CN 201611023816 A CN201611023816 A CN 201611023816A CN 106555583 B CN106555583 B CN 106555583B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- Measuring Fluid Pressure (AREA)
Abstract
The present invention discloses a kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device, including double u-tube pressure measuring system, Data collecting and analysis system；Double u-tube pressure measuring system includes: double pressure surge tanks, double capillary, wellhead tee joint export sealing unit, nitrogen injection port；Data collecting and analysis system includes: that fixed height difference spacing point flowing bottomhole pressure (FBHP) acquires and analytical calculation coal dust content unit, display storage unit in real time；The liquid at double pressure surge tank connected wells bottom, one end of double capillary is separately connected double pressure surge tanks, the other end of double capillary is drawn respectively by bypassing, and exported after capillary is drawn appendix outside by sealing unit by wellhead tee joint and be separately connected Data collecting and analysis system, nitrogen injection port is located on the capillary of wellhead tee joint export sealing unit；Fixed height difference spacing point flowing bottomhole pressure (FBHP) acquires in real time to be connected with display storage unit.There are also application methods.
Description
Technical field
The invention belongs to the technical fields of coal bed gas well exploitation, more particularly to a kind of coal bed gas well ground coal powder output and well
Monitoring device, and the method using the device are pressed in underflow.
Background technique
Coal bed gas well coal dust output is brought the production of coal bed gas well and is seriously affected, and finds coal dust output and production at the first time
It has troubles to production and maintenance has very important effect and directive significance.Flowing bottomhole pressure (FBHP) is oil well, coal bed gas well, shale gas
An indispensable important indicator in the classes production process such as well, it is to work out the important evidence of reasonable mining system and rationally make
The most important parameter that needs in degree implementation process are known.It is reasonable to arrange especially in the recovery process of coal bed gas well
Degree of gathering and processing is to be directly related to well yield and service life, has important theory significance and economic value.Coal bed gas production process
In coal dust monitored and prevent to facilitate the implementation of reasonable mining, formulate reasonable mining system especially in conjunction with flowing bottomhole pressure (FBHP).
Summary of the invention
Technology of the invention solves the problems, such as: overcoming the deficiencies of the prior art and provide a kind of coal bed gas well ground coal powder output
With flowing bottomhole pressure (FBHP) monitoring device, it is capable of the flowing bottomhole pressure (FBHP) of precision real time measuring and the double pressure surge tank positions of detection, Neng Goujing
True real-time measurement and the well liquid specific gravity for detecting double pressure surge tank positions, further real-time monitoring and whether provide coal dust output and
Output ratio, easy to implement, performance and effect are good, at low cost, structure is simple, operation is easy and energy-efficient, long service life.
The technical solution of the invention is as follows: this coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device, packet
Include double u-tube pressure measuring system, Data collecting and analysis system；
Double u-tube pressure measuring system includes: double pressure surge tank (1), double capillary (2), well head
Threeway exports sealing unit (4), nitrogen injection port (8)；
Data collecting and analysis system includes: the real-time acquisition unit of fixed height difference spacing point flowing bottomhole pressure (FBHP)
(5), analytical calculation coal dust content unit (6), display storage unit (7)；
The liquid at double pressure surge tank connected wells bottom, one end of double capillary are separately connected double pressure surge tanks, pass through side
It is logical to draw the other end of double capillary respectively, and sealing unit is exported by wellhead tee joint and draws capillary outside appendix
After be separately connected Data collecting and analysis system, nitrogen injection port is located at the capillary close to wellhead tee joint export sealing unit
On；Fixed the real-time acquisition unit of height difference spacing point flowing bottomhole pressure (FBHP) (5) and display storage unit (7) connection.
Additionally provide the application method of this coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device, including following step
It is rapid:
(1) two real-time pressure values P1, P2 of fixed height difference spacing are obtained by double u-tube pressure measuring system；
(2) the fixation height difference of double u-tube pressure measuring system is h, calculates the well liquid mean specific gravity of fixed height difference section are as follows: r=
(P1-P2)/h；
(3) ratio containing coal dust is calculated；
(4) flowing bottomhole pressure (FBHP) change curve is drawn by monitoring, draws coal dust production curve by monitoring and comparing.
The present invention measures coal bed gas well by U-tube principle precise measurement coal bed gas well flowing bottomhole pressure (FBHP) and the thin U-tube of bistrichiasis
Flowing bottomhole pressure (FBHP) fixed spacing pressure difference further determines that the specific gravity of tested segment determines coal dust yielding condition using accurate fixed spacing pressure difference,
It is capable of the flowing bottomhole pressure (FBHP) of precision real time measuring and the double pressure surge tank positions of detection, it being capable of precision real time measuring and the double pressure of detection
The well liquid specific gravity of surge tank position, further real-time monitoring and whether provide coal dust output and output ratio, easy to implement, performance
It is good with effect, it is at low cost, structure is simple, operation is easy and energy-efficient, long service life.
Detailed description of the invention
Fig. 1 shows the structural representation of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device according to the present invention
Figure.
Fig. 2 shows the application methods of coal bed gas well ground coal powder output according to the present invention and flowing bottomhole pressure (FBHP) monitoring device
Flow chart.
Label declaration:
1 pair of pressure surge tank
2 double capillaries
3 clips
4 sealing units
The 5 fixed real-time acquisition units of height difference spacing point flowing bottomhole pressure (FBHP)
6 analytical calculation coal dust content units
7 display storage units
8 nitrogen injection ports
9 wellhead tee joints (or bypass)
10 liquid levels
11 oil pipes
12 wells, casing
13 connection well liquids
Specific embodiment
From figure 1 it appears that this coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device comprising double-U-shaped
Pipe pressure measuring system, Data collecting and analysis system；
Double u-tube pressure measuring system include: double pressure surge tanks 1, double capillary 2, wellhead tee joint 9 export sealing unit 4,
Nitrogen injection port 8；
Data collecting and analysis system includes: the real-time acquisition unit 5 of fixed height difference spacing point flowing bottomhole pressure (FBHP), analytical calculation coal
Powder content unit 6, display storage unit 7；
The liquid at double pressure surge tank connected wells bottom, one end of double capillary are separately connected double pressure surge tanks, pass through side
It is logical to draw the other end of capillary respectively, and exporting sealing unit by wellhead tee joint will be behind capillary extraction appendix outside
It is separately connected Data collecting and analysis system, nitrogen injection port is located on the capillary of wellhead tee joint export sealing unit；
The real-time acquisition unit 5 of height difference spacing point flowing bottomhole pressure (FBHP), analytical calculation coal dust content unit 6, display storage unit 7 is fixed successively to connect
It connects.
In addition, the double u-tube pressure measuring system further includes clip 3, capillary is fixed on oil pipe.In this way can
So that capillary is fixed well.
In addition, the clip 3 be it is multiple, be evenly distributed on every Oil-saving pipe.Capillary can be made every certain in this way
Distance is just fixed, prevents capillary from workover treatment is destroyed or influenced during going into the well.
As shown in Fig. 2, the application method of this coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device is additionally provided,
The following steps are included:
(1) two real-time pressure values P1, P2 of fixed height difference spacing are obtained by double u-tube pressure measuring system；
(2) the fixation height difference of double u-tube pressure measuring system is h, calculates the well liquid mean specific gravity of fixed height difference section are as follows: r=
(P1-P2)/h；
(3) ratio containing coal dust is calculated；
(4) flowing bottomhole pressure (FBHP) change curve is drawn by monitoring, draws coal dust production curve by monitoring and comparing.
The present invention measures coal bed gas well by U-tube principle precise measurement coal bed gas well flowing bottomhole pressure (FBHP) and the thin U-tube of bistrichiasis
Flowing bottomhole pressure (FBHP) fixed spacing pressure difference further determines that the specific gravity of tested segment determines coal dust yielding condition using accurate fixed spacing pressure difference,
It is capable of the flowing bottomhole pressure (FBHP) of precision real time measuring and the double pressure surge tank positions of detection, it being capable of precision real time measuring and the double pressure of detection
The well liquid specific gravity of surge tank position, further real-time monitoring and whether provide coal dust output and output ratio, easy to implement, performance
It is good with effect, it is at low cost, structure is simple, operation is easy and energy-efficient, long service life.
Detailed description below an installation and implementation method of the invention comprising following steps:
1) double pressure surge tanks 1 are mounted below sand sediment pipe, i.e., the first double pressure surge tanks of tripping in；
2) double capillary 2 is connected, then successively by normal well workover process tripping in screen casing, pump, oil pipe 11 etc.；
3) every Oil-saving pipe makes a call to 3 fixed capillary of clip；
4) capillary is drawn by annular space by bypass respectively, sealing unit 4 is exported for capillary by wellhead tee joint (bypass 9)
Pipe is drawn outside appendix respectively；
5) double capillary is connected respectively to the fixed height difference spacing point flowing bottomhole pressure (FBHP) of Data collecting and analysis system 5 and acquires in real time
Unit；Pass through fixed height difference spacing point drift angle analytical calculation coal dust content unit 6；Show storage unit 7；
6) it after being installed, is injected using high pressure nitrogen (pressure is determined according to well liquid depth estimation) from nitrogen injection port 8,
Closed after maintaining 3-5 minute, when pressure drops to it is relatively stable after, U-tube balance, measuring pressure is exactly pair pressure surge tank 1
Locate flowing bottomhole pressure (FBHP), obtained specific gravity is exactly the mean specific gravity of well liquid at double pressure surge tanks 1；
7) long term monitoring is carried out；
If 8) well liquid mining keeps well liquid height change bigger, flowing bottomhole pressure (FBHP) variation is also bigger, more accurate to measure,
It can regular appropriate after-teeming nitrogen.
The invention has the benefit that
1, the present invention can be with the flowing bottomhole pressure (FBHP) of precision real time measuring and the double pressure surge tank positions of detection；
2, the present invention can be with the well liquid specific gravity of precision real time measuring and the double pressure surge tank positions of detection, further prison in real time
Whether surveying and provide coal dust output and output ratio；
3, the present invention it is easy to implement, performance and effect are good, it is at low cost, structure is simple, operation is easy, it is energy-efficient and use
The feature of service life length.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, it is all according to
According to technical spirit any simple modification, equivalent change and modification to the above embodiments of the invention, still belong to the present invention
The protection scope of technical solution.
Claims (4)
1. a kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device, it is characterised in that: it includes that double u-tube surveys pressure
System, Data collecting and analysis system；
Double u-tube pressure measuring system include: double pressure surge tanks (1), double capillary (2), wellhead tee joint export sealing unit (4),
Nitrogen injection port (8)；
Data collecting and analysis system includes: the real-time acquisition unit of fixed height difference spacing point flowing bottomhole pressure (FBHP) (5) and analytical calculation coal
Powder content unit (6), display storage unit (7)；
The liquid at double pressure surge tank connected wells bottom, one end of double capillary are separately connected double pressure surge tanks, will by bypass
The other end of double capillary is drawn respectively, and exporting sealing unit by wellhead tee joint will be behind double capillary extraction appendix outside
It is separately connected Data collecting and analysis system, nitrogen injection port is located on the capillary of wellhead tee joint export sealing unit；
Fixed the real-time acquisition unit of height difference spacing point flowing bottomhole pressure (FBHP) (5) and display storage unit (7) connection.
2. coal bed gas well ground coal powder output according to claim 1 and flowing bottomhole pressure (FBHP) monitoring device, it is characterised in that: described
Double u-tube pressure measuring system further includes clip (3), and capillary is fixed on oil pipe.
3. coal bed gas well ground coal powder output according to claim 2 and flowing bottomhole pressure (FBHP) monitoring device, it is characterised in that: described
Clip (3) is multiple, one fixing hoop (3) of every Oil-saving pipe installation.
4. a kind of application method of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device according to claim 1,
It is characterized by comprising following steps:
(1) two real-time pressure values P1, P2 of fixed height difference spacing are obtained by double u-tube pressure measuring system；
(2) the fixation height difference of double u-tube pressure measuring system is h, calculates the well liquid mean specific gravity of fixed height difference section are as follows: r=(P1-
P2)/h；
(3) ratio containing coal dust is calculated；
(4) flowing bottomhole pressure (FBHP) change curve is drawn by monitoring, draws coal dust production curve by monitoring and comparing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611023816.1A CN106555583B (en) | 2016-11-14 | 2016-11-14 | A kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device and method |
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| CN201611023816.1A CN106555583B (en) | 2016-11-14 | 2016-11-14 | A kind of coal bed gas well ground coal powder output and flowing bottomhole pressure (FBHP) monitoring device and method |
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| CN106555583A CN106555583A (en) | 2017-04-05 |
| CN106555583B true CN106555583B (en) | 2019-07-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CL2008002879A1 (en) * | 2008-09-26 | 2009-05-15 | Watermin S A | Device for the formation of insoluble chemical compounds in a liquid medium comprising a) a reactor containing a pair of electrodes and a second pair of electrodes, b) spiral-shaped conductor element, c) blower pump and photon emitter, d) generator of an electric / magnetic field, e) agitation medium; and method. |
| CN102465695B (en) * | 2010-11-09 | 2015-09-09 | 中国石油天然气股份有限公司 | A kind of method for supervising of coal bed gas well and device |
| CN203396675U (en) * | 2013-08-22 | 2014-01-15 | 河南理工大学 | Pulverized coal monitoring system for exhausting-extracting process of coal-bed gas well |
| CN103726833A (en) * | 2013-12-10 | 2014-04-16 | 中国科学院力学研究所 | Ground data collection system for capillary tube testing |
| CN103742128B (en) * | 2013-12-18 | 2016-08-31 | 中国科学院力学研究所 | A kind of system for testing pressure of capillary tube of coal bed gas |
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Effective date of registration: 20220919 Address after: 101400 room 208, second floor, building 13, yard 53, Yanqi street, Yanqi Economic Development Zone, Huairou District, Beijing (cluster registration) Patentee after: Beijing Kelisen Technology Co.,Ltd. Address before: 100190, No. 15 West Fourth Ring Road, Beijing, Haidian District Patentee before: INSTITUTE OF MECHANICS, CHINESE ACADEMY OF SCIENCES |
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