CN103775056B - Fireflood well gas tracer detecting method - Google Patents
Fireflood well gas tracer detecting method Download PDFInfo
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- CN103775056B CN103775056B CN201310655298.5A CN201310655298A CN103775056B CN 103775056 B CN103775056 B CN 103775056B CN 201310655298 A CN201310655298 A CN 201310655298A CN 103775056 B CN103775056 B CN 103775056B
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Abstract
The invention discloses a fireflood well gas tracer detecting method, and belongs to the technical field of oil exploitation. The parameters such as distribution of injected air, the air movement direction and the migration time are analyzed according to monitoring data, then the combustion direction of a firing line can be judged, and a reference and a basis are provided for injecting and exploiting parameter regulating and controlling. Sulfur hexafluoride serves as a fireflood well gas tracer agent, during the fireflood air injecting process, a certain number of tracer agents are injected into a gas-injection well along with air, the injected tracer agents in the stratum flow to surrounding production wells along with the air and are exploited out of the ground with fireflood flue gases to be detected through a detecting instrument, and then the movement situation of the air in the stratum and the communication situations among the wells are analyzed; the tracer agent detecting instrument is a special portable tracer agent infrared detector or a gas chromatograph provided with an appropriate chromatographic column; the usage quantity of the tracer agents is determined according to the gas injection speed of the gas-injection well, the gas injection quantity and the measuring range of the tracer agent detecting instrument.
Description
Technical field
The present invention relates to tracer gas technique detection method between a kind of fireflood well, belong to oil recovery technique field.
Background technology
Fireflood refers to inject air constantly oil reservoir, is then lighted by oil reservoir, utilizes oil reservoir burning to produce
Heat realize steam drive, the multiple displacement mode such as flue gas flooding, thus improve the one of oil recovery factor
Plant thermal recovery mode.It is high that fire flood mode has recovery ratio, and energy consumption is little, it is possible to again develop abandoned oil
The feature hidden, thus be increasingly subject to pay attention to.But, owing to fireflood mechanism is more complicated, and stratum
Anisotropism, be easy in fireflood gas injection process occur air fingering, break phenomenon, give scene
Note is adopted parameter regulation and control and is brought bigger difficulty, therefore, strengthens the dynamic monitoring dynamics of well group, for fireflood
Effect is dynamically analyzed and is noted and adopts parameter regulation and control and provide data to be accurately and timely just particularly important.
Tracer Technique is one of the effective means in monitoring oil reservoir high bleed-through road.In liquid tracer type
In, conventional has rhodanate, bromide, iodide, HTO etc.；In gas tracer type,
Conventional has tritiated methane, helium, fluorochlorohydrocarbon class etc..But, due to the high-temperature characteristic on fireflood stratum
(maximum temperature can reach 800 DEG C), conventional liq Tracer Technique and gas Tracer Technique or
Cannot apply, or construction is complicated, monitoring difficulty.Therefore, necessary find a kind of high temperature resistant,
Stable in properties, adsorption losses are little, and cheap, construct simple, easy to detect, be applicable to fire
Drive tracer and the detection technique thereof of oil recovery technique.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides gas tracer method between a kind of fireflood well
And detection method.
It is an object of the invention to provide tracer gas technique detection side between a kind of fireflood well for fire flood technology
Method.
Tracer gas technique detection method between a kind of fireflood well, it is characterised in that inject according to Analysis on monitoring data
The parameters such as the distribution of air, air migration direction, migration time, such that it is able to judge live wire burning side
To, adopt parameter regulation and control for note and reference and foundation are provided.
Tracer gas technique detection method between a kind of fireflood well, containing following steps；Use sulfur hexafluoride conduct
Gas tracer between fireflood well, during fireflood air injection, notes a certain amount of tracer with air
Entering gas injection well, the tracer of injection flows to producing well around with air in the earth formation, with fireflood flue
Gas extraction ground together, then detects with detecting instrument, analyzes air accordingly and migrates in the earth formation
Exchange information between situation and well；Tracer detecting instrument be tracer special portable formula infrared radiation detection apparatus or
It is equipped with the gas chromatograph of suitable chromatography post；Tracer consumption is according to gas injection well gas injection speed, gas injection rate
Depending on tracer detecting instrument range；
Air compressor air intake mouth can be used to inject for tracer injection mode or well head is with air injection mode,
Preferably well head is with air injection mode；Tracer sampling mode can be to produce casing to take gas sample valve
Directly it is connected with portable infrared detector, is then turned on the detection of detecting instrument automatic air-breathing, or uses
Detect with portable detector or gas chromatograph after airbag sampling, the sampling period according to gas injection speed,
Depending on tracer injection rate, well spacing and Field Production Data；
Air compressor air intake mouth injection mode is to be connected, tracer then according to sky with air compressor air intake mouth
The air suction speed of press and the concentration that needs of tracer discharge tracer, and individual-well injection rate is
2-15m3；Well head refers to be connected with head valve by tracer, according to note with air injection mode
Gas speed and tracer need concentration to open air relief valve, are uniformly injected into ground by tracer with air
Layer；In two kinds of injection modes, preferred well head is with air injection mode.
Tracer gas technique detection method between a kind of fireflood well, the present invention provide for fireflood inter-well tracer test skill
The tracer of art is sulfur hexafluoride, during gas injection well air injection, by a certain amount of tracer with sky
Gas injects shaft bottom, and the tracer of injection flows to producing well around with air in the earth formation, final and cigarette
Road gas extraction ground together, by showing in portable infrared detector or chromatographic flue gas
Track agent content, thus analyze oil reservoir combustion position and interwell communication situation.
Tracer detection mode of the present invention needs detection by quantitative, and detecting instrument is portable red
Outer detector or gas chromatograph.The chromatographic condition of gas chromatograph is according to the difference of chromatographic column and not
With, and the detection mode of portable detector is the most different.Used by scene of the present invention, detecting instrument is
Portable infrared detector, sensitivity is 1ppm, range is that 3000ppm, relatively gas chromatograph grasp mutually
It is the simplest, convenient to make.
The tracer consumption that the present invention uses is according to gas injection well gas injection speed and tracer detecting instrument
Depending on sensitivity, generally, individual-well injection rate is 2-15m3。
The tracer injection mode that the present invention uses can be that air compressor air intake mouth injects or well head is with empty
Gas injects, and air compressor air intake mouth injection mode is to be connected with air compressor air intake mouth by tracer, then root
Tracer is discharged according to the air suction speed of air compressor machine and the concentration that needs of tracer；Well head is with air
Injection mode refers to be connected tracer with head valve, needs concentration according to gas injection speed and tracer
Open air relief valve, tracer is uniformly injected into stratum with air.Optimizing well in two kinds of injection modes
Mouth is with air injection mode, because the method is simpler, convenient.
Producing well sampling mode of the present invention uses two ways, and one takes for producing casing
Gas sample valve is directly connected with portable infrared detector, is then turned on the inspection of detecting instrument automatic air-breathing
Survey；Its two be with airbag sample after detect with portable detector.It addition, according to producing well distance note
The distance of gas well is divided into a line well, two wires well, three line wells, and the sampling period is according to gas injection speed, well spacing
And depending on Field Production Data, generally sampling period interval is more than the injection length of tracer
Section, but should ensure that a line well at least samples once every day, to ensure that the very first time monitors tracer,
Can suitably adjust the sampling period according to testing result simultaneously.Two wires well and the sampling time started of three line wells
Being later than a line well, the sampling period can be more than the sampling period of a line well.
Detailed description of the invention
Obviously, the many modifications and variations that those skilled in the art are done based on spirit of the invention belong to
Protection scope of the present invention.
Embodiment 1: tracer gas technique detection method between a kind of fireflood well, this technology uses sulfur hexafluoride
As tracer, select by the calculating of tracer consumption, tracer injection mode, adopt producing well spike
The steps such as agent sampling detection are implemented, and inject the distribution of air, migration side according to Analysis on monitoring data
To parameters such as, migration times.The tracer that this technology uses is high temperature resistant, stable in properties, and it is convenient to inject,
Stratum background concn is low, and detection sensitivity is high, effect corrosion-free to personnel and equipment, it is easy to promoting should
With.
Tracer gas technique detection method between a kind of fireflood well, uses sulfur hexafluoride to show as gas between fireflood well
Track agent, during fireflood air injection, injects gas injection well by a certain amount of tracer with air, injects
Tracer in the earth formation with air to producing well around flow, together with fireflood flue gas extraction ground
Face, then detects with detecting instrument, analyzes air accordingly and migrates in the earth formation situation and well inter-drain
Understanding and considerate condition.
Tracer detecting instrument is tracer special portable formula infrared radiation detection apparatus or is equipped with suitable chromatography post
Gas chromatograph.
Tracer consumption is according to gas injection well gas injection speed, gas injection rate and tracer detecting instrument range
Fixed.
Air compressor air intake mouth can be used to inject for tracer injection mode or well head is with air injection mode,
Preferably well head is with air injection mode.
Tracer sampling mode can be to produce casing to take gas sample valve and directly detect with portable infrared
Instrument connects, and is then turned on the detection of detecting instrument automatic air-breathing, or uses portable inspection after airbag sampling
Survey instrument or gas chromatograph detection, the sampling period according to gas injection speed, tracer injection rate, well spacing with
And depending on Field Production Data.
Embodiment 2:
A well is gas injection well, and gas injection speed is 800m3/ h, well group producing well 9 mouthfuls, wherein 6 mouthfuls of wells
Produce, well spacing 50-70m, use air compressor air intake mouth to inject tracer 6m3, injection length is 4h,
In well group, the producing well sampling period is set to 8h.B well detects in complete 24h rear pass gas of constructing
Tracer concentration is 12ppm, and hereafter the shortening sampling period is 4-6h, detects that tracer concentration is gradually
Raising, after 40h, tracer concentration reaches peak value, and for 237ppm, then tracer concentration is opened
Begin to decline, can't detect after 10d.C well and D well start detection respectively after 32h and 48h
To tracer, hereafter tracer concentration maintains between 8-50ppm, lasting about 7d, and other
3 mouthfuls of wells are not detected by tracer.The two wires well of other well groups, three line wells in A well-B well direction
Also after 3d, detect the tracer that 5-70ppm does not waits.These data explanation A well air is dashed forward
The broken time is about 1d, and has channeling direction is mainly A well-B well direction, and other 3 mouthfuls are not detected
Well to tracer is smooth sea and the well of gas injection well A well or does not involves well, may be by other gas injection wells
Involve.
Embodiment: 3:
A ' well is gas injection well, and gas injection speed is 500m3/ h, well group producing well 8 mouthfuls, wherein 7 mouthfuls
Well produces, well spacing 50-70m, uses well head to inject tracer 4m with air manner3, injection length
For 2h, in well group, the producing well sampling period is set to 6h.B ' well is at complete 56h rear pass gas of constructing
In detect that tracer concentration is 9ppm, hereafter extend the sampling period be 12h, detect that tracer is dense
Degree gradually rises, and after 4d, tracer concentration reaches peak value, and for 129ppm, then tracer is dense
Degree begins to decline, and can't detect after 15d.C ' well, D ' well, E ' and F ' well are respectively at 4-6d
After start tracer to be detected, hereafter tracer concentration is between 5-80ppm, continue about 15d,
And other 2 mouthfuls of wells are not detected by tracer.At the two wires well of other well groups, three line wells also after 5d
Detect the tracer that 5-40ppm does not waits.These data explanation A ' well air break through is
About 56h, in well group, by effect preferably, gas channeling phenomenon is the most serious for producing well.
As it has been described above, embodiments of the invention are explained, but as long as substantially do not have
The inventive point and the effect that have the disengaging present invention can have a lot of deformation, and this is to those skilled in the art
For be apparent from.Therefore, such variation is also integrally incorporated in protection scope of the present invention
Within.
Claims (2)
1. tracer gas technique detection method between a fireflood well, it is characterised in that inject according to Analysis on monitoring data
The distribution of air, air migration direction, migration time parameter, such that it is able to judge live wire burning direction,
Adopt parameter regulation and control for note and reference and foundation are provided；Use sulfur hexafluoride as gas tracer between fireflood well,
During fireflood air injection, a certain amount of tracer is injected gas injection well with air, the tracer of injection
Flowing to producing well around with air in the earth formation, extraction ground together with fireflood flue gas, then with inspection
Surveying instrument to detect, analysis air is migrated in the earth formation between situation and well and is exchanged information accordingly；Tracer
Detecting instrument is tracer special portable formula infrared radiation detection apparatus or the gas chromatograph being equipped with suitable chromatography post；
Depending on tracer consumption is according to gas injection well gas injection speed, gas injection rate and tracer detecting instrument range；
Tracer injection mode uses air compressor air intake mouth to inject or well head is with air injection mode；Spike
Agent sampling mode takes gas sample valve for production casing and is directly connected with portable infrared detector, then opens
Open the detection of detecting instrument automatic air-breathing, or with portable detector or gas chromatograph after sampling with airbag
Detection, depending on the sampling period is according to gas injection speed, tracer injection rate, well spacing and Field Production Data；
Air compressor air intake mouth injection mode is to be connected, tracer then according to pneumatics with air compressor air intake mouth
The air suction speed of machine and the concentration that needs of tracer discharge tracer, and individual-well injection rate is 2-15m3；
Well head refers to be connected tracer with head valve with air injection mode, according to gas injection speed and spike
Agent needs concentration to open air relief valve, and with air, tracer is uniformly injected into stratum.
Tracer gas technique detection method between a kind of fireflood well the most according to claim 1, it is characterised in that
A well is gas injection well, and gas injection speed is 800m3/ h, well group producing well 9 mouthfuls, wherein 6 mouthfuls of wells produce,
Well spacing 50-70m, uses air compressor air intake mouth to inject tracer 6m3, injection length is 4h, raw in well group
The product well sampling period is set to 8h；B well detects tracer concentration in complete 24h rear pass gas of constructing
For 12ppm, hereafter the shortening sampling period is 4-6h, detects that tracer concentration gradually rises, after 40h,
Tracer concentration reaches peak value, and for 237ppm, then tracer concentration begins to decline, and detects after 10d
Less than；C well and D well start tracer to be detected respectively after 32h and 48h, and hereafter tracer is dense
Degree maintains between 8-50ppm, continues about 7d, and other 3 mouthfuls of wells are not detected by tracer；?
The two wires well of other well groups in A well-B well direction, three line wells also detect 5-70ppm not after 3d
Deng tracer；These data explanation A well air break through is about 1d, and has channeling direction is predominantly
A well-B well direction, and smooth sea and well that other 3 mouthfuls wells being not detected by tracer are gas injection well A well
Or do not involve well.
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| CN104594887B (en) * | 2014-12-01 | 2017-10-17 | 中国石油天然气股份有限公司 | It is a kind of to detect reagent and application and equipment that whether oil reservoir enters the high-temperature oxydation stage |
| CN106065773B (en) * | 2016-07-21 | 2019-06-18 | 中国海洋石油集团有限公司 | A kind of gas well liquid loading tubing string leakage detection method based on gas tracer |
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| RU2054531C1 (en) * | 1993-03-11 | 1996-02-20 | Малое научно-производственное предприятие "Институт геотехнологии" | Method for thermal recovery of oil |
| AU2010279465B2 (en) * | 2009-08-05 | 2014-07-31 | Shell Internationale Research Maatschappij B.V. | Systems and methods for monitoring a well |
| WO2013009895A1 (en) * | 2011-07-12 | 2013-01-17 | Lawrence Livermore National Security, Llc | Encapsulated tracers and chemicals for reservoir interrogation and manipulation |
| CN102767356B (en) * | 2012-08-08 | 2015-05-27 | 张方礼 | Method for using combustion and vapor combination flooding to exploit thick oil |
| CN203285413U (en) * | 2013-03-12 | 2013-11-13 | 中国石油天然气股份有限公司 | Rolling type electric ignition and monitoring system for combustion of oil in situ |
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