CN107816345A - A kind of apparatus and method of well casing gas tolerance metering - Google Patents
A kind of apparatus and method of well casing gas tolerance metering Download PDFInfo
- Publication number
- CN107816345A CN107816345A CN201710928220.4A CN201710928220A CN107816345A CN 107816345 A CN107816345 A CN 107816345A CN 201710928220 A CN201710928220 A CN 201710928220A CN 107816345 A CN107816345 A CN 107816345A
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- Prior art keywords
- gas
- well casing
- current stabilization
- effect current
- casing gas
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Classifications
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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
Abstract
The invention provides a kind of apparatus and method of well casing gas tolerance metering.The device includes：Connector hose, multiple-effect current stabilization detection pipe, gas flowmeter, one end of connector hose are connected with oil well casing, and the other end of connector hose is connected with multiple-effect current stabilization detection pipe；Multiple-effect current stabilization detection pipe stably passes through for well casing gas；The outer wall of multiple-effect current stabilization detection pipe is provided with two geometrical clamps, two detection probes for fixed gas flowmeter.Present invention also offers the method for the well casing gas tolerance completed using said apparatus metering.Apparatus and method of the present invention can be in well mouth of oil well rapid evaluation different tube diameters, pressure, the casing gas tolerance of flow.
Description
Technical field
The present invention relates to a kind of metering device and method, more particularly to a kind of metering device of well casing gas tolerance and side
Method, belong to oil gas field environmental technology field.
Background technology
For a long time, it is one of oilfield surface engineering urgent problem to be solved to control casing gas.Well casing gas belongs to oil
One kind of field associated gas, account for associated gas total amount more than half.If can not drain sleeve gas in time, oil extraction can be produced
Raw considerable influence.The Normal practice that eliminating casing gas influences is to carry out oil and gas multiphase flow using valve discharging gas under certain pressure injection oil pipe, but is worked as
Even valve discharging gas under certain pressure is not applied to without tubing system, opening sleeve valve is had in most cases casing gas is seted off into air
In.So do and both pollute environment, aggravate greenhouse effects again, caused petroleum industry, environmental protection, the height weight of all sectors of society
Depending on.
Global torch abatement plan (GGFR) estimation subsidized according to the World Bank, the whole world is every year because combustion liner gas newly heats
Room gas discharges about 400,000,000 tons of CO2 equivalents.According to the country, even if in recent years, emptying is natural every year for Domestic Oil And Gas Fields
Tolerance is also up to 1,000,000,000 sides or so.The recovery of casing gas receives significant attention with control, is either directly installed in well head various
Equipment, or collect station in downstream and build lighter hydrocarbons recovery factory etc., accurate metering and the assessment of casing gas yield are to ensure to arrange
Apply the prerequisite of effect.
Casing gas main component is methane, ethane, other short chain alkanes, water etc., and some contains H2S、CO2Deng sour gas,
The component ratio difference of different oil wells is larger.Because its flow conditions has many unusual features, as gas flow is unstable, and
Periodically it is widely varied with the time, belongs to pulsating fluid；Water content is big in makings, and carries crude oil and micro granule foreign secretly,
Condensed liquid is produced during airflow passes throttling arrangement；In addition, between different wells, same well different times, tolerance all exist it is very big
Difference, it is varied, it is several irregular to seek；There is no corresponding measurement standard or specification；There is no generally applicable engineering experience side
Journey is available for utilizing；Lack accurate history data accumulation etc..So tolerance measurement and assessment, are all technical barrier all the time, both
It is difficult to carry out project feasibility analysis, can not be effectively supervised again.
At present, well casing gas tolerance, which is assessed, mainly following manner：
One of method is estimated by gas-oil ratio.Oil yield is the most accurate creation data that enterprise grasps, generally
Think that there is certain proportion relation between casing gas yield and oil yield, by setting an average gas-oil ratio, be multiplied by oil
Yield, it is able to estimate casing gas tolerance.Convention thinks, to the oilfield exploitation middle and later periods, with the rise of crude oil water content, gas-oil ratio
It will be gradually reduced.But still there is case quite a lot to show that gas-oil ratio is in rising trend on the contrary.Gas-oil ratio constant interval scope is non-
Chang great, estimation error are very big.
The two of method are American Petroleum Institute (API) (API) issues《Oil and natural gas industry greenhouse gas emission assessment side
Method outline》(version in 2009), casing gas Emission amount calculation are listed in 5.6.4 sections " heavy oil and the discharge of crude oil pitch casing gas ",
Ask and discharge total flow (and wherein methane concentration) by detecting casing gas, to calculate greenhouse gas emissions, but do not refer to sleeve pipe
The detection method and instrument of throughput.The section table 5-18 and table 5-19 sets forth the casing gas based on crude output and well number
The discharge of methane factor.Advantage：Amount of calculation very little, suitable for assessing a large range of total release.Inferior position：Obviously this
If there is very big error in fixed emission factor for evaluating the individual well to vary.
The three of method are to use orifice flowmeter, and this is to be based on SYL04-83《The standard orifice plate metering side of gas discharge
Method》Standard method.But the flow conditions of standard requirement should be that single-phase, stabilization or its change are more slow, and casing gas is not
These conditions can be met.
The four of method are to utilize leaflet wind wheel ane mometer or/pitot tube flowmeter.Both similar instruments are all to pass through survey
Gas flow rate at thimble exhaust duct mouth center is measured, multiplied by with orifice area, to obtain gas instantaneous delivery.Advantage：It is easy to operate,
Many places measurement can flexibly be moved.Inferior position：Because casing gas generation and discharge fluctuation are larger, this mode can only understand the test period roughly
Interior emission behaviour, if wanting to improve the data precision, continuous 24h monitorings need to be carried out according to standardization program.
The five of method are to carry out casing gas using intelligent flow-integrating instrument to measure examination, and precision is in 0.1m3/ h, available for natural
The measurement of tracheae linear flow rate etc..But the instrument is mainly manifested in there is also certain deficiency：When sleeve pipe throughput very little
When (be less than 1.5m3/ h), this instrument is not shown, the oil well of low discharge casing gas can not be tested in this way.
The content of the invention
In order to solve the above-mentioned problems of the prior art, it is an object of the invention to provide one kind accurately, quickly, just
Take, the metering device of the well casing gas tolerance of strong applicability, it is various to different tube diameters, pressure, flow etc. to may be implemented in well head
The casing gas tolerance of condition quickly assess on the spot and detection.
In order to realize above-mentioned technical purpose, the invention provides a kind of device of well casing gas tolerance metering, the device
Including：
Connector hose, multiple-effect current stabilization detection pipe, gas flowmeter；
One end of connector hose is connected with oil well casing, and the other end of connector hose is connected with multiple-effect current stabilization detection pipe；
Multiple-effect current stabilization detection pipe stably passes through for well casing gas；
The outer wall of multiple-effect current stabilization detection pipe is provided with two geometrical clamps, and two detections for fixed gas flowmeter are visited
Head.
In said apparatus, it is preferable that multiple-effect current stabilization detection length of tube is fixed with diameter dimension, is internally provided with multiple tight
The inner tube of solid matter row, inner tube cross section are the straight tube of equilateral hexagon；It is highly preferred that the diameter of the straight tube is less than multiple-effect current stabilization
The diameter of detection pipe, the straight tube form honeycomb channels.
In said apparatus, the purpose that inner tube is set in multiple-effect current stabilization detection pipe is to reduce the gas of multiple-effect current stabilization detection pipe
The radius of the cross section of stream, flowed through with what the air-flow ensured in multiple-effect current stabilization detection pipe can be stablized, make the spy of gas flowmeter
The streamline for the gas that head monitors is uniform, it is ensured that the accuracy of detection, while reduce the length of multiple-effect current stabilization detection pipe, make it just
In carrying.
In said apparatus, inner tube is shorter in length than the length of multiple-effect current stabilization detection pipe, and is shorter than multiple-effect current stabilization detection pipe
The position of geometrical clamp on outer wall.
In said apparatus, it is preferable that geometrical clamp is positioned close on the both sides outer wall of the multiple-effect current stabilization detection pipe port of export.
In said apparatus, it is preferable that two geometrical clamps tiltedly stretch out on the outer wall of multiple-effect current stabilization detection pipe.
In said apparatus, it is preferable that geometrical clamp and the outer wall of multiple-effect current stabilization detection pipe are set in 45° angle.
In said apparatus, it is preferable that geometrical clamp is short tube, and the two of fixed gas flowmeter detect in the way to insert
Probe.
In said apparatus, it is preferable that gas flow is calculated as doppler ultrasound gas flowmeter.
In said apparatus, it is preferable that the device of well casing gas tolerance metering also includes teledata receiving terminal, far
Journey data receiver is used for the data for receiving gas flowmeter.
In said apparatus, connector hose can according to the suitable flexible pipe of size selection of oil well casing, connector hose
Length is so that multiple-effect current stabilization detection pipe smoothly horizontal positioned can be preferred with ground.
The doppler ultrasound gas flowmeter that the present invention uses is by detecting work of the fluid to supersonic beam (ultrasonic pulse)
For measuring the instrument of fluid flow, to be contactless, have measurement range is wide, can accurately measure Pulsating Flow, without movable member,
The advantages that no pressure loses.Although in casing gas contain drop, solid impurity etc. more, made troubles to the detection of most instruments,
Doppler method is applied to the less high two phase fluid of out-phase content, such as impure more water, slurries and oils, suitable for oil well
The measurement of casing gas.
The device of the well casing gas tolerance metering of the present invention includes multiple-effect current stabilization detection pipe, and multiple-effect current stabilization detection pipe is by oil
Gas drains from oil-gas casing to be come, and in the tolerance of the external detection oil gas of oil-gas casing, is avoided and is mounted directly flowmeter
The misalignment triggered on Oil/Gas Pipe the problems such as so that detection is simpler, conveniently；It is additionally, since in multiple-effect current stabilization detection pipe
Outside is provided with geometrical clamp so that can disposably set the parameter of Doppler detector, it is not necessary to because of the change of place and oil well
And reset, reduce workload and mistake；Inner tube is internally provided with multiple-effect current stabilization detection pipe, gas can be made in multiple-effect
Stably pass through in current stabilization detection pipe, and the cross section of straight tube is designed as equilateral hexagon, is easy to process, and can avoid because of carrying etc.
Caused inner tube comes off problem.
The device of the well casing gas tolerance metering of the present invention is applied to the measurement of all kinds casing gas, including different pipes
Footpath, pressure, flow, gas composition etc..
The present invention also provides a kind of method of well casing gas tolerance metering, and this method is to utilize above-mentioned well casing gas gas
What the device of gauge amount was completed.
The above method specifically includes following steps：
The device of well casing gas tolerance metering is installed, opens the valve of oil well casing, after 30min-1h, the inspection of multiple-effect current stabilization
When casing gas in test tube smoothly passes, the tolerance of gas flowmeter detection casing gas is opened；
When detecting gas containing steam jacket, in instrument menu setting, it is " water vapour (Steam) " to select fluid media (medium),
Can accurate measurement display discharge air-flow flow, and by there is related parameter, moisture content is directly calculated, and then draw deduction
The net discharge capacity of the hydrocarbon gas of water vapour.
In the device of the well casing gas tolerance metering of the present invention, connector hose is suitable for various sizes of oil well casing,
Enhance the general applicability of device and the convenience of execute-in-place.
The apparatus and method of the well casing gas tolerance metering of the present invention, can accurately and rapidly measure well casing gas
The tolerance of gas, strong applicability, and device carry portable.
Brief description of the drawings
Fig. 1 is the structural representation of the device of the well casing gas tolerance metering of embodiment 1.
Fig. 2 is that the structural diagrams of multiple-effect current stabilization detection pipe are intended to.
Fig. 3 is the sectional view of multiple-effect current stabilization detection pipe steady flow segment.
Main Reference symbol description
The short tube of 1 connector hose, 2 multiple-effect current stabilization detection pipe, 3 doppler ultrasound gas flowmeter, 4 first short tube 5 second
Embodiment
In order to which technical characteristic, purpose and the beneficial effect of the present invention is more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that to the present invention can practical range restriction.
Embodiment 1
A kind of device of well casing gas tolerance metering is present embodiments provided, its structure is as shown in figure 1, the device bag
Include：
Connector hose 1, multiple-effect current stabilization detection pipe 2, doppler ultrasound gas flowmeter 3,
One end of connector hose 1 is connected with oil well casing, and the other end of connector hose 1 is connected with multiple-effect current stabilization detection pipe 2；
Multiple-effect current stabilization detection pipe 2 stably passes through for well casing gas；
The first short tube 4 and the second short tube 5 are being provided with the both sides of the port of export outer wall of multiple-effect current stabilization detection pipe 2, with
The outer wall of multiple-effect current stabilization detection pipe 2 tiltedly stretches out in 45° angle, as shown in Fig. 2 the two of doppler ultrasound gas flowmeter 3
Individual detection probe is inserted in the first short tube 4 and the second short tube 5 respectively；
Multiple-effect current stabilization detection pipe 2 is internally provided with the inner tube that multiple compact arranged cross sections are equilateral hexagon, forms
Honeycomb channels, as shown in figure 3, the sleeve pipe flow line for arriving the probe monitors of gas flowmeter is uniform, it is ensured that detection accuracy.
The method that the well casing gas tolerance completed using said apparatus is measured, specifically includes following steps：
The device of well casing gas tolerance metering is installed, opens the valve of oil well casing, after 30min-1h, the inspection of multiple-effect current stabilization
When casing gas in test tube smoothly passes, the tolerance of gas flowmeter detection casing gas is opened.
In addition, gas flow data can be passed through signal transmitting apparatus real-time Transmission by doppler ultrasound gas flowmeter 3
To teledata receiving terminal, realize that scene is unattended with monitoring.
If any further demand, gas sample can be gathered with airbag, utilize various hydro carbons groups in chromatographic casing gas
Divide concentration, can accurately adjust the greenhouse gas emissions of the directly mode such as discharge and burning and exhausting.
The apparatus and method of the well casing gas tolerance metering of the present invention, can accurately and rapidly measure well casing gas
The tolerance of gas, strong applicability, and device carry portable.
Claims (8)
1. a kind of device of well casing gas tolerance metering, it is characterised in that the device includes：
Connector hose, multiple-effect current stabilization detection pipe, gas flowmeter；
One end of the connector hose is connected with oil well casing, the other end of the connector hose and the multiple-effect current stabilization detection pipe
It is connected；
The multiple-effect current stabilization detection pipe stably passes through for well casing gas；
The outer wall of the multiple-effect current stabilization detection pipe sets two geometrical clamps, two detection probes for fixed gas flowmeter.
2. the device of well casing gas tolerance metering according to claim 1, it is characterised in that the multiple-effect current stabilization detection
Length of tube is fixed with diameter dimension, and inside sets multiple compact arranged inner tubes, and said inner tube is that cross section is to wait hexagon
Straight tube, two geometrical clamps tiltedly stretch out on the outer wall of multiple-effect current stabilization detection pipe.
3. the device of well casing gas tolerance metering according to claim 1 or 2, it is characterised in that the fixed sandwiched
Put on the both sides outer wall close to the multiple-effect current stabilization detection pipe port of export.
4. the device of well casing gas tolerance according to claim 2 metering, it is characterised in that the geometrical clamp with it is described
The outer wall of multiple-effect current stabilization detection pipe is set in 45° angle.
5. the device of the well casing gas tolerance metering according to claim 3 or 4, it is characterised in that the geometrical clamp is
Short tube, in the way to insert the two of fixed gas flowmeter detection probe.
6. the device of well casing gas tolerance metering according to claim 1, it is characterised in that the gas flow is calculated as
Doppler ultrasound gas flowmeter.
7. the device of the well casing gas tolerance metering according to claim any one of 1-6, it is characterised in that the oil well set
The device of pipe gas tolerance metering also includes teledata receiving terminal, and the teledata receiving terminal is used to receive gas flowmeter
Data.
A kind of 8. method of well casing gas tolerance metering, it is characterised in that this method is to utilize any one of claim 1-7 institute
What the device for the well casing gas tolerance metering stated was completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710928220.4A CN107816345A (en) | 2017-10-09 | 2017-10-09 | A kind of apparatus and method of well casing gas tolerance metering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928220.4A CN107816345A (en) | 2017-10-09 | 2017-10-09 | A kind of apparatus and method of well casing gas tolerance metering |
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| CN107816345A true CN107816345A (en) | 2018-03-20 |
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ID=61607802
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| CN201710928220.4A Pending CN107816345A (en) | 2017-10-09 | 2017-10-09 | A kind of apparatus and method of well casing gas tolerance metering |
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Cited By (2)
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| CN109611090A (en) * | 2018-12-28 | 2019-04-12 | 中国石油天然气股份有限公司 | A kind of CO2Displacement of reservoir oil set returns the method and device of well acquisition gas |
| CN111827998A (en) * | 2019-04-18 | 2020-10-27 | 中国石油天然气集团有限公司 | Real-time sampling device for methane detection in fracturing flow-back fluid |
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| CN109611090A (en) * | 2018-12-28 | 2019-04-12 | 中国石油天然气股份有限公司 | A kind of CO2Displacement of reservoir oil set returns the method and device of well acquisition gas |
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