CN208320404U - The processing system of fireflood high exhaust gas well - Google Patents
The processing system of fireflood high exhaust gas well Download PDFInfo
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- CN208320404U CN208320404U CN201820309118.6U CN201820309118U CN208320404U CN 208320404 U CN208320404 U CN 208320404U CN 201820309118 U CN201820309118 U CN 201820309118U CN 208320404 U CN208320404 U CN 208320404U
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Abstract
The utility model discloses a kind of processing systems of fireflood high exhaust gas well, it is related to viscous crude fireflood oil well technical field, the processing system of the fireflood high exhaust gas well includes: the rotational flow type gas-liquid separater for being connected with production wellhead, and the rotational flow type gas-liquid separater is for reducing from the water content in the tail gas that production wellhead inputs；The arrival end of the air cooler being connected with the rotational flow type gas-liquid separater, the rotational flow type gas-liquid separater can be connected with the outlet end of the air cooler；The desulfurizing tower and digester being connected with the air cooler, the digester be it is multiple, multiple digesters are connected in parallel.The application is able to solve the problem of exhaust pipe hydrops, frozen block and desulfurization medicament are because of water logging failure, while improving the degree of purification of tail gas.
Description
Technical field
The utility model relates to viscous crude fireflood oil well technical field, in particular to a kind of processing system of fireflood high exhaust gas well
System.
Background technique
With the continuous expansion that fireflood is developed, tail gas amount is also continuously increased, since initial production well tail gas takes individual well list
The versatility of tank dry desulfurization, digester is poor, and for part well because tolerance is excessive, tail gas clean-up degree is unable to reach discharge standard, because
This, the H in tail gas2S and remaining O2Very big hidden danger is brought to safety in production.Still further aspect, due to being produced in fireflood exploitation
Well tail gas humidity is larger, and the increase of tolerance causes water vapor portion wet in its component to be consequently increased, and therefore, exhaust system exists
The phenomenon that will appear pipeline frosting undergauge, hydrops frozen block in the lower production of winter temperature, is will cause in system in this way in pressure
The problem of rising, build the pressure pressurization, pipeline frozen block of system caused by tolerance increase also bring huge difficulty, serious shadow to production management
Ring the effect of fireflood exploitation.
Utility model content
In order to overcome the drawbacks described above of the prior art, the technical problem to be solved is that provide for the utility model embodiment
A kind of processing system of fireflood high exhaust gas well is able to solve what exhaust pipe hydrops, frozen block and desulfurization medicament failed by water logging
Problem, while improving the degree of purification of tail gas.
The specific technical solution of the utility model embodiment is:
A kind of processing system of fireflood high exhaust gas well, the processing system of the fireflood high exhaust gas well include:
Rotational flow type gas-liquid separater for being connected with production wellhead, the rotational flow type gas-liquid separater is for reducing certainly
Water content in the tail gas of production wellhead input；
The air cooler being connected with the rotational flow type gas-liquid separater, the arrival end of the rotational flow type gas-liquid separater can be with
The outlet end of the air cooler is connected；
The desulfurizing tower and digester being connected with the air cooler, the digester be it is multiple, multiple digesters are simultaneously
Connection connection.
In a preferred embodiment, the processing system of the fireflood high exhaust gas well further include:
Device for recycling sewage, the device for recycling sewage respectively with the water out of the rotational flow type gas-liquid separater, described
The water out of air cooler, the desulfurizing tower water out be connected.
In a preferred embodiment, the rotational flow type gas-liquid separater is used to collect tail from the production wellhead
Gas.
In a preferred embodiment, there is meeting pipe point on the pipeline between the desulfurizing tower and the air cooler,
The digester is connected with the meeting pipe point, and the internal diameter of the meeting pipe point to the pipeline between the air cooler is more than or equal to two
It is very little.
In a preferred embodiment, the internal diameter of meeting pipe point to the pipeline between the desulfurizing tower is more than or equal to
3 cun.
In a preferred embodiment, the rotational flow type gas-liquid separater is for the set pipe closer with the production wellhead
Door is connected.
In a preferred embodiment, the outlet of the arrival end of the rotational flow type gas-liquid separater and the air cooler
Switch valve is provided on pipeline between end.
In a preferred embodiment, the processing system of the fireflood high exhaust gas well further include:
Production station, the production station are connected with the producing well, and the production station is used for defeated collected from the producing well
Crude oil out；
The gathering station being connected with the production station.
In a preferred embodiment, the H in gas discharged after the digester desulfurization2S content is in 1.4mg/
m3To 4.3mg/m3Between.
In a preferred embodiment, the H in gas discharged after the desulfurizing tower desulfurization2S content is in 1.4mg/
m3To 4.3mg/m3Between.
The technical solution of the utility model have it is following significant the utility model has the advantages that
The application has carried out existing process flow excellent aiming at the problem that Development characteristics and tail gas of fireflood oil reservoir are brought
Change, realizes defeated, the safe outlet of gas-liquid point, guarantee the safety of gathering system.Meanwhile tail gas treatment process is transformed,
Parallel connection is changed to traditional digester series connection, while increasing the internal diameter of pipeline before desulfurizing tower, getter resistance is reduced, increases
The big processing capacity of desulfurizing tower, improves vent gas treatment speed, finally improves well yield.In addition, to fire in the application
The various phenomenons that displacement of reservoir oil well occurs in operation propose corresponding measure processing, with the perfect regulation to tail gas, elimination safety
Hidden danger, it is ensured that firewire uniformly promotes.
Referring to following description and accompanying drawings, the particular implementation of the utility model is disclosed in detail, specifies practical
Novel principle can be in a manner of adopted.It should be understood that the embodiments of the present invention in range not thus by
Limitation.In the range of the spirit and terms of appended claims, the embodiments of the present invention includes many changes, modifications
With it is equivalent.The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit in any way disclosed by the utility model
Range.In addition, shape and proportional sizes of each component in figure etc. are only schematically, to be used to help the reason to the utility model
Solution is not the specific shape and proportional sizes for limiting each component of the utility model.Those skilled in the art is practical new at this
Under the introduction of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.
Fig. 1 is the new 38 well daily output curve graph of daybreak 1-46-；
Fig. 2 is the new 38 well indicator card of daybreak 1-46-；
Fig. 3 is the systematic schematic diagram of the processing system of fireflood high exhaust gas well in the utility model embodiment；
Fig. 4 is the curve graph of gas injection rate and oil production in one embodiment；
Fig. 5 is tail gas oxygen content change curve in one embodiment；
Fig. 6 is the low area's condition of production change curve that takes effect in one embodiment；
Fig. 7 is area's condition of production change curve of advancing by leaps and bounds in one embodiment；
Fig. 8 is daily oil production same period correlation curve in one embodiment；
Fig. 9 is tail gas amount correlation curve before and after profile control in one embodiment；
Figure 10 is to access daily flow curve before and after gas-liquid separation device in one embodiment；
Figure 11 is the structural schematic diagram of rotational flow type gas-liquid separater in the utility model embodiment.
The appended drawing reference of the figures above:
1, production wellhead；2, rotational flow type gas-liquid separater；21, shell；22, first layer separates umbrella；23, the second layer separates
Umbrella；24, first Disengagement zone；25, thin Disengagement zone；26, blowdown area is settled；27, medium inlet；28, sewage draining exit；29, diversion pipe；210,
Relief valve port；211, gauge port；212, liquidometer；213, crude exports；214, water out；3, air cooler；4, desulfurizing tower；
5, digester；6, device for recycling sewage；It 7, can pipe point；8, switch valve.
Specific embodiment
In conjunction with the description of attached drawing and specific embodiment of the present invention, the utility model can be clearly understood
Details.But specific embodiment of the present utility model described herein, it is only used for explaining the purpose of this utility model, without
It can be understood as being limitations of the present invention in any way.Under the introduction of the utility model, technical staff is contemplated that
Any possible deformation based on the utility model, these are regarded as belonging to the scope of the utility model.It needs to illustrate
It is that when element is referred to as " being set to " another element, it can directly on the other element or there may also be placed in the middle
Element.When an element is considered as " connection " another element, it can be directly to another element or can
Centering elements can be existed simultaneously.Term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or
Electrical connection, the connection being also possible to inside two elements can be directly connected, can also indirectly connected through an intermediary,
For the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.Made herein
Term " vertical ", " horizontal ", "upper", "lower", "left", "right" and similar statement simply to illustrate that mesh
, it is not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
Fireflood is to inject air into stratum, and the condition of a combustion heat release is artificially created in underground, forms a radial shifting
Dynamic combustion zone, by constantly injecting air sustained combustion, generating heat makes crude oil pyrolysis, distillation, viscosity reduction, and will have flowing
Property light oil+steam+flue gas be driven onto front.When the oxygen in air is consumed, cigarette that nitrogen and other gas mixings are formed
Road gas just forms tail gas by producing well discharge together.The complicated components of tail gas, mainly by N2、CH4、CO2、CO、C2H6、
C3H8、O2And H212 kinds of gases such as S are constituted.Wherein N2、CH4And CO2Content is more, accounts for about 97%, CO, O2、H2S content is relatively
It is few, as shown in table 1.
Table 1: Du's 66- 48 pieces of exhaust gas composition parameter lists of Du
Wherein, H2S brings serious security risk, the characteristic with easy firing, deep-etching and severe toxicity, and concentration is more than
66.3MG/M3In the case where can make one to be poisoned, seriously can causing death.The untreated H of fireflood well group2S gas concentration range exists
8.6-489.9MG/M3, average content 62MG/M3, it is greater than environmental protection standard 14.4MG/M3.In addition, O2Also certain peace is brought
Full hidden danger: work as O2When content reaches 12%, O2With the CH in tail gas4Easily explode.The O of fireflood area monitoring at present2Content is flat
Mean value is 1.03%, is far below Mixed Gases Explosion limiting value, but be also easy to produce oxygen content liter due to advancing by leaps and bounds etc. has channeling, single layer
High phenomenon, it is 6 mouthfuls that in Jan-Sept, 2015, which monitors the exceeded well number of oxygen content, O2Content is between 3%-5%, up to
8%.
Still further aspect influences pump efficiency, or even gas lock occur, oil well output is caused to decline since tail gas amount increases.With daybreak
For new 38 well of 1-46-, Fig. 1 is the new 38 well daily output curve graph of daybreak 1-46-, and Fig. 2 is the new 38 well indicator card of daybreak 1-46-, the well
Day row 3799 side of tail gas, is influenced to produce daily that liquid, oil are on a declining curve, and daily output liquid drops to 3t by 9.3t by tail gas, day oil-producing by
3.2 drop to 0.8t, and pump efficiency is only 17.3%.The increase of tail gas amount be easy to cause system to build the pressure, and oil well tail gas amount is excessive to be caused
System pressure rises, and formation builds the pressure；In addition, H2S content is exceeded, and especially winter tail gas humidity is big, liquefying speed is fast, causes
Existing pipeline frosting undergauge, hydrops frozen block, in digester 5 the phenomenon that hydrops, tail gas cannot such as be carried out effectively, processing rapidly, easily
Oil well gas pipeline and system is caused to build the pressure.Both the above situation can lead to oil well casing pressure rising, yield decline.
Presently, as fireflood drives a well several increases, gas production is consequently increased, the H in tail gas2S, remaining O2With
And high humility brings great hidden danger to safety in production, and system caused by tolerance increase builds the pressure, frozen block is also managed to production
Reason brings huge difficulty, seriously affects fireflood development effectiveness.Therefore, scientific tail gas management and regulation are that can fireflood project
The key link being succeeded.In order to solve the problems, such as exhaust pipe hydrops, frozen block and desulfurization medicament because water logging fail, together
The degree of purification of Shi Tigao tail gas, Fig. 3 are the systematic schematic diagram of the processing system of fireflood high exhaust gas well in the utility model embodiment,
As shown in figure 3, a kind of processing system of fireflood high exhaust gas well is proposed in this application, the processing system of the fireflood high exhaust gas well
System may include: the rotational flow type gas-liquid separater 2 for being connected with production wellhead 1, and the rotational flow type gas-liquid separater 2 is used for
It reduces from the water content in the tail gas that production wellhead 1 inputs；The air cooler 3 being connected with the rotational flow type gas-liquid separater 2, institute
The arrival end for stating rotational flow type gas-liquid separater 2 can be connected with the outlet end of the air cooler 3；It is connected with the air cooler 3
Desulfurizing tower 4 and digester 5, the digester 5 be it is multiple, multiple digesters 5 are connected in parallel.
In original process, the crude oil produced from producing well directly passes through corresponding pipeline and is delivered to production station to carry out
Collecting defeated, a large amount of tail gas generated in fireflood in the process, which can be clipped in oil gas, is delivered to production station, gathering station etc. by pipeline,
Such tail gas can cause certain insecurity in transportation system.And in this application, the rotational flow type gas-liquid separater 2
Arrival end can be connected with the outlet end of the air cooler 3, specifically, the arrival end of the rotational flow type gas-liquid separater 2 with
It is provided with switch valve 8 on pipeline between the outlet end of the air cooler 3, when switch valve 8 is opened, rotational flow type gas-liquid separater
The outlet end of 2 arrival end and the air cooler 3 be connected directly by pipeline it is logical, when switch valve 8 disconnects, spiral-flow type gas-liquid point
Arrival end from device 2 is separated with the outlet end of the air cooler 3.The rotational flow type gas-liquid separater 2 and the producing well
The sleeve gate of mouth 1 is connected, and the rotational flow type gas-liquid separater 2 is used to collect tail gas from the production wellhead 1.It is opened in fireflood
Production wellhead 1 is used 5 processing mode of digester first by hair initial stage, is specially opened switch valve 8 so that spiral-flow type gas-liquid point
Arrival end from device 2 is connected with the outlet end of the air cooler 3 by pipeline, then in such a way that gas-liquid point is defeated, tail gas
It is flowed out by sleeve gate, digester 5 is passed directly to by pipeline, the outlet after desulfurization process, liquid crude is then passed through by well head
Transportation system is successively delivered to production station, gathering station etc., to realize that gas-liquid point is defeated.Fireflood initial stage of development, tail gas amount is on the low side, because
This water content is also relatively on the low side, can directly be handled tail gas by digester 5.Pass through treated the tail of digester 5
H in gas2S content is in 1.4-4.3mg/m3, comply fully with safety and environmental protection standard.The advantages of this kind of mode, is: in digester 5
The characteristic that the solid-state pharmacy used has stability good, and the dosing period is long, can achieve 3-5 months, while not by season shadow
It rings.Digester 5 is connected by the way of multiple parallel connections, and the processing speed of tail gas so can be improved, and increases processing capacity, with
Solve the problems, such as that digester 5 builds the pressure.By taking a certain oil well as an example, arranging tail gas amount day is 5000Nm3, 2 are increased simultaneously to the well
The digester 5 of connection.After implementation, the casing pressure of the well drops to 0.13MPa by 0.53MPa, H in efflux gas after processing2S content by
15ppm drops to 3ppm, and oil well produces liquid daily and rises to 22.4t by 17.8t.
It then will specially be opened by the way of the centralized processing of desulfurizing tower 4 when fireflood oil well is in the scale development phase
Valve 8 is closed to close so that the arrival end of rotational flow type gas-liquid separater 2 and the outlet end of the air cooler 3 mutually disconnect.Continue using gas
The defeated mode of liquid point, tail gas are flowed out by sleeve gate, then pass to rotational flow type gas-liquid separater 2, and rotational flow type gas-liquid separater 2 is used
In reducing from the water content in the tail gas that production wellhead 1 inputs, the tail gas that streaming gas-liquid separator 2 flows out that spins continues to flow into sky
Cooler 3, vapor in tail gas condensation, air cooler 3 in air cooler 3 are used to further decrease the water content in tail gas.
The tail gas being discharged from air cooler 3 then flows into just desulfurization in desulfurizing tower 4 again, to remove H2S.Since desulfurizing tower 4 is with higher
Desulfurization rate, such as by 7 desulfurizing towers 4 be at present that accessible well number reaches 370 mouthfuls, handle day tail gas reach 20.5 ×
104Nm3, while investment reduction, cost, the labor intensity of worker can be greatly reduced.By desulfurizing tower 4, treated
The H that Tail gas measuring arrives2S content is in 1.4-4.3mg/m3, meet safety and environmental protection standard.Due to the fireflood oil well scale development phase
When the tail gas amount that generates be significantly increased, and water content therein also greatly increases.If water content therein can not be reduced to meeting
Standard then will lead to desulfurization medicament in desulfurizing tower 4 and fail because of water logging, and can also have a large amount of hydrops and jelly in exhaust pipe
Stifled problem.
Oil well large-minded for tail, water content is big uses the spiral-flow type gas-liquid separation of novel research and development in this application
Device 2, Figure 11 are the structural schematic diagram of rotational flow type gas-liquid separater 2 in the utility model embodiment, as shown in figure 11, the spiral-flow type
Gas-liquid separator 2 can specifically include shell 21, and first layer separation umbrella 22 and second layer separation umbrella are provided in the shell 21
23, the first layer separation umbrella 22 and second layer separation umbrella 23 will be separated into inside the shell 21 and segment from area 25, just
Disengagement zone 24 and sedimentation blowdown area 26, the medium inlet 27 of shell 21 are connected with first Disengagement zone 24, the sewage draining exit of shell 21
28 settings are connected, shell 21 is internally provided with diversion pipe 29, the diversion pipe in 21 bottom of shell with sedimentation blowdown area 26
29 are fed through first layer separation umbrella 22 along the vertical direction, one end of the diversion pipe 29 upward and with it is described segment from
Area 25 is connected, and the other end of the diversion pipe 29 is connected with the outlet of the just Disengagement zone 24 of the shell 21.Tail gas
The first Disengagement zone 24 that rotational flow type gas-liquid separater 2 is flowed by medium inlet 27 passes through the separation of first Disengagement zone 24, part liquid
The sinkings such as body and impurity enter to sedimentation blowdown area 26, then flow upwardly by the tail gas of first Disengagement zone 24 to thin Disengagement zone
25, gas-liquid is further separated in thin Disengagement zone 25, and the tail gas after the separation of thin Disengagement zone 25 flows into diversion pipe 29, to
Under flow to first Disengagement zone 24 outlet outflow rotational flow type gas-liquid separater 2 shell 21.When the impurity that 21 bottom of shell is saved bit by bit
When excessive with liquid, it can be discharged by sewage draining exit 28.Crude exports 213 and water out are additionally provided in sedimentation blowdown area 26
214, the position of crude exports 213 is higher than the position of water out 214, when the water and crude oil saved bit by bit in sedimentation blowdown area 26 reach one
The original of the hot water for having utility value and upper surface floating can be discharged when determining degree by crude exports 213 and water out 214
Oil.Certainly the top of 2 shell 21 of rotational flow type gas-liquid separater is provided with relief valve port 210, gauge port 211 etc., and
The components such as liquidometer 212 are also provided in sedimentation blowdown area 26.
This rotational flow type gas-liquid separater 2 by it is in the prior art only rely on single Gravity Separation be changed to eddy flow aggravate power joint point
From mode, separated region by original one be changed to just Disengagement zone 24, thin Disengagement zone 25, sedimentation 26 3, blowdown area, from
And gas-liquid separation effect is effectively enhanced, and it is detected by using portable dew point hygrometer, after rotational flow type gas-liquid separater 2,
Water content in tail gas is by 2.4g/Nm3Drop to 1.5g/Nm3。
In order to be collected to the liquid water generated after rotational flow type gas-liquid separater 2, the dehumidifying of air cooler 3, the application
In the fireflood high exhaust gas well processing system further include: device for recycling sewage 6, the device for recycling sewage 6 respectively with institute
State the water out 214 of the water out 214 of rotational flow type gas-liquid separater 2, the water out 214 of the air cooler 3, the desulfurizing tower 4
It is connected.
In a preferred embodiment, having on the pipeline between the desulfurizing tower 4 and the air cooler 3 can pipe point
7, the digester 5 is connected with the meeting pipe point 7, and the internal diameter of meeting pipe point 7 to the pipeline between the air cooler 3 is greater than
Equal to two cun, the internal diameter of the meeting pipe point 7 to the pipeline between the desulfurizing tower 4 is more than or equal to 3 cun.Since desulfurizing tower 4 has
Higher desulfurization rate, it is therefore desirable to the flow for improving 3 phase desulfurizing tower 4 of air cooler conveying tail gas, by by air cooler 3 to desulfurization
Pipeline between tower 4 is enlarged to certain internal diameter, and the flow that the tail gas flowed out from air cooler 3 flows into desulfurizing tower 4 can be improved.At this
Processing system initial stage air cooler 3 to the pipeline between desulfurizing tower 4 internal diameter using 1.5 cun, the pipe is found after the completion of system
Line is unable to satisfy tail gas conveying capacity of the air cooler 3 to desulfurizing tower 4, then carries out test adjustment to the pipeline, finally to manage
The internal diameter of point 7 to the pipeline between the air cooler 3 is more than or equal to two cun, the meeting pipe point 7 to the pipe between the desulfurizing tower 4
The internal diameter of line is more than or equal to 3 cun.Tail gas its pressure in the sleeve gate outflow of well mouth of oil well is 0.15MPa, is passing through eddy flow
0.13MPa or so is reduced to when formula gas-liquid separator 2, and behind tail gas to desulfurizing tower 4, due to pipeline be unable to satisfy air cooler 3 to
The tail gas conveying capacity of desulfurizing tower 4, desulfurizing tower 4 causes to build the pressure to the tail gas being discharged in oil well so that the pressure after desulfurizing tower 4 rises
To 0.3MPa.After test adjustment, the pressure after desulfurizing tower 4 is down to 0.08MPa by 0.3MPa.As shown in table 2, after pipeline modification
The Liquid outputs of 4 mouthfuls of oil wells 29.1t is risen to by 22.4t, increase 6.7t.The oil well of 21 mouthfuls of replacement during whole operation
150 mitron lines, daily average production per well increase 0.8t, add up to increase oil 450t.
2 oil pipeline of table transformation front and back yield comparison table
| Pound sign | 1 | 2 | 3 | 4 | It is total |
| Yield (t) before pipeline modification | 4.5 | 7.4 | 2.2 | 8.3 | 22.4 |
| Yield (t) after pipeline modification | 6.5 | 8.4 | 3.4 | 10.8 | 29.1 |
| It compares (t) | 2 | 1 | 1.2 | 2.6 | 6.7 |
It also proposed a kind for the treatment of process of fireflood high exhaust gas well in this application, the treatment process of the fireflood high exhaust gas well
It may comprise steps of:
S101: tail gas and crude oil that the production wellhead 1 exports are divided into two-way and conveyed respectively.
In this step, in original process, the crude oil produced from producing well directly passes through corresponding pipeline and is delivered to
For production station to carry out collecting defeated, a large amount of tail gas generated in fireflood in the process, which can be clipped in oil gas, is delivered to oil recovery by pipeline
It stands, gathering station etc., such tail gas can cause certain insecurity in transportation system.In the application by the production wellhead 1
The tail gas of output is exported by sleeve gate, and the crude oil of oil well output is then exported from the gate of oil pipe four-way.
S102: in the fireflood initial stage of development stage, tail gas is delivered to digester 5 all the way and carries out desulfurization, wherein is multiple described
Digester 5 is connected in parallel.
In this step, when fireflood exploitation is in initial stage, the tail gas generated in oil well is less, can be directly used
Digester 5 in parallel can meet the desulfurization to tail gas, while also can satisfy at the unit time to tail gas desulfurization processing
Reason amount.Specially switch valve 8 is opened so that the arrival end of rotational flow type gas-liquid separater 2 and the outlet end of the air cooler 3 lead to
It crosses pipeline to be connected, then in such a way that gas-liquid point is defeated, tail gas is flowed out by sleeve gate, is passed directly to digester by pipeline
5, the outlet after desulfurization process, liquid crude on the gate of well head being connected with oil pipe then by exporting through transportation system successively
It is delivered to production station, gathering station etc., to realize that gas-liquid point is defeated.Pass through H in treated the tail gas of digester 52S content exists
1.4mg/m 3-4.3mg/m3, comply fully with safety and environmental protection standard.Tail gas is delivered to the mode that digester 5 carries out desulfurization all the way
The advantages of be: the solid-state pharmacy used in digester 5 has the good characteristic of stability, and the dosing period is long, can achieve
3-5 months, while not by seasonal effect.
S103: in the fireflood scale development phase, tail gas is delivered to rotational flow type gas-liquid separater 2 all the way and carries out gas-liquid point
From.
In the present embodiment, the tail gas amount generated in the fireflood scale development phase, each oil well is significantly increased, and
The digester 5 of connection has not been able to satisfy the tail gas amount of generation completely, while the humidity of tail gas is big, liquefying speed is fast, easily leads to out
Existing pipeline frosting undergauge, hydrops frozen block, in digester 5 the phenomenon that hydrops.Therefore, first the tail gas generated in oil well is conveyed at this time
Gas-liquid separation is carried out to rotational flow type gas-liquid separater 2.Gas-liquid separation is carried out by rotational flow type gas-liquid separater 2, it can will be aqueous
Amount is more than or equal to 2.4g/Nm3Tail gas carry out the gas that gas-liquid separation is processed so that rotational flow type gas-liquid separater 2 is discharged and contain
Water is less than equal to 1.5g/Nm3。
S104: the gas that the rotational flow type gas-liquid separater 2 exports is delivered to air cooler 3 and is cooled down.
In this step, the tail gas that spin streaming gas-liquid separator 2 flows out continues to flow into air cooler 3, and the water in tail gas steams
Gas condensation in air cooler 3, air cooler 3 are used to further decrease the water content in tail gas.By the above-mentioned means, guaranteeing stream
Enter the humidity in the tail gas of desulfurizing tower 4 will not fast liquefying and cause to convey the pipeline hydrops of tail gas, frosting undergauge etc., to protect
Pipeline is demonstrate,proved to the displacement of tail gas, avoids oil well tail gas amount excessive and system pressure is caused to rise, formation builds the pressure.
S105: the gas after cooling of air cooler 3 is delivered to desulfurizing tower 4 and carries out desulfurization.
In this step, the gas after cooling of air cooler 3 is delivered to desulfurizing tower 4 and carries out desulfurization, melted in fireflood scale
In the hair stage, the treating capacity to tail gas can be guaranteed by carrying out desulfurization by desulfurizing tower 4, while it is also ensured that the desulfurization to tail gas is imitated
Fruit.The H in gas after 4 desulfurization of desulfurizing tower2S content is in 1.4 mg/m3To 4.3mg/m3Between, meet safety collar
Guarantor's standard.
Having on pipeline between the desulfurizing tower 4 and the air cooler 3 can pipe point 7, the digester 5 and the meeting
Pipe point 7 is connected；In this step, the internal diameter for pipe point 7 to the pipeline between the air cooler 3, institute can also be changed
The internal diameter for stating meeting pipe point 7 to the pipeline between the desulfurizing tower 4, by the meeting pipe point 7 to the pipeline between the air cooler 3
Internal diameter is increased to more than or equal to two cun, by it is described can pipe point 7 to the pipeline between the desulfurizing tower 4 internal diameter increase to greater than etc.
In three cun.Present treatment system initial stage air cooler 3 to the pipeline between desulfurizing tower 4 internal diameter using 1.5 cun, system is completed
It finds that the pipeline is unable to satisfy tail gas conveying capacity of the air cooler 3 to desulfurizing tower 4 afterwards, test adjustment then is carried out to the pipeline,
Make in a kind of embodiment can pipe point 7 to the internal diameter of the pipeline between the air cooler 3 be equal to two cun, it is described can pipe point 7 to
The internal diameter of pipeline between the desulfurizing tower 4 is equal to 3 cun.Tail gas well mouth of oil well sleeve gate outflow when its pressure be
0.15MPa is reduced to 0.13MPa or so when through rotational flow type gas-liquid separater 2, and behind tail gas to desulfurizing tower 4, due to pipe
Line is unable to satisfy tail gas conveying capacity of the air cooler 3 to desulfurizing tower 4, desulfurizing tower 4 tail gas being discharged in oil well is caused to build the pressure so that
Pressure after desulfurizing tower 4 rises to 0.3MPa.After test adjustment, the pressure after desulfurizing tower 4 is down to 0.08MPa by 0.3MPa.
When the internal diameter of meeting pipe point 7 to the pipeline between the air cooler 3 is greater than two cun, the meeting pipe point 7 is between the desulfurizing tower 4
When the internal diameter of pipeline is greater than 3 cun, the pressure of 4 arrival end of desulfurizing tower can be reduced to 0.08 Mpa or less.
S106: when the oil well of fireflood occurs unidirectionally to advance by leaps and bounds or when has channeling, oil well tail gas amount increases, oxygen content increases, at this time
The gas injection rate by adjusting corresponding gas injection well, control oilwell produced fluid amount and cooperation profile control measures are needed, to reduce oil well tail gas
In oxygen content, improve fireflood development effectiveness.
For example, when occurring oil well of the oxygen content greater than 3% in well group, by suitably reducing the gas injection rate of gas injection well, with
The utilization rate of oxygen is improved, so as to adjust oil well by effect situation.In one embodiment, Fig. 4 is gas injection in one embodiment
The curve graph of amount and oil production, Fig. 5 are tail gas oxygen content change curve in one embodiment, as shown in Figure 4, Figure 5, the well
Group initial stage day gas injection rate is 10000Nm3, wherein well tail gas oxygen content is up to 6.38%, and it is excessive that analysis obtains the well gas injection rate
Cause to burn insufficient.Therefore, gas injection rate is adjusted to 7000Nm3, which drops to 1.2% therewith, daily output
Oil mass rises to 8t by 5.6t, and effect is more apparent.
In another example when in well group oil well occur unidirectionally advance by leaps and bounds when, control capacity and the Liquid output of producing well in the same direction with
Adjust the direction of propulsion of firewire.In one embodiment, Fig. 6 is that low area's condition of production variation that takes effect is bent in one embodiment
Line, Fig. 7 are to advance by leaps and bounds in one embodiment area's condition of production change curve, as shown in Figure 6, Figure 7, in Fig. 6 since the left end on
First curve in side is daily output liquid, and intermediate Article 2 curve is to arrange tail gas day, and lower section Article 3 curve is day oil-producing, in Fig. 7 from
It is to arrange tail gas day that left end, which starts the curve of top first, and intermediate Article 2 curve is daily output liquid, and lower section Article 3 curve is daily output
Oil.The well group initial stage day air injection amount 6000Nm3, form a piece of region of advancing by leaps and bounds in south, thus northern oil well formed it is inefficient
Area.The Qu that advances by leaps and bounds arranges tail gas amount 6000Nm3Left and right produces liquid 29.9t daily, determining to implement the region some oil wells through analysis
It closes, by observation in a period of time, inefficient area's oil well tail gas amount, yield have different degrees of rising, and the newly-increased well 3 that takes effect occur
Mouthful.
In another example implementing profile control envelope when the phenomenon that tail gas is unidirectionally advanced by leaps and bounds occurs in oil well in well group to the oil well and altering, with drop
The gas production of the low well is unidirectionally advanced by leaps and bounds by effectively inhibiting, to improve other oil well gas production in well group, it is equal to reach firewire
The purpose of even propulsion.In one embodiment, which is the bi-directional venting well of two well groups, and the profile control day before yesterday arranges tail gas amount
5000Nm3, and yield is relatively low, produces liquid 4t/d daily, day oil-producing 0.6t/d determines that it belongs to typically due to unidirectional after analysis
The low oil well to take effect of high yield gas caused by advancing by leaps and bounds.In the period after implementing profile control envelope to the oil well and altering, Fig. 8 is to implement at one
Daily oil production same period correlation curve in example, as shown in table 3, Fig. 8, the curve being located above in Fig. 8 is this period daily oil production, under
The curve of side is daily oil production of upper period.The well tail gas amount is stablized in 1500Nm3Left and right, stage produce 53 days, oil-producing 245t,
Same period increase 197t is compared, it is aqueous to have dropped 37%.Fig. 9 is tail gas amount correlation curve before and after profile control in one embodiment, such as
Shown in Fig. 9, the curve being located above in Fig. 9 is before profile control, underlying curve is entire well group tail gas distribution shape after profile control
Condition is uniform, and effect of increasing production is obvious.
The different surrounding yield comparison tables of table 3
In another example the tail gas discharge capacity when oil well in well group is greater than 2000Nm3When, in oil well with oil well pump tubing string in
It connects into gas-liquid separation device, the lower section of the oil well pump is arranged in the gas-liquid separation device, through the above way to improve
The pump efficiency of oil well pump.In one embodiment, part is greater than 2000Nm for day row's tail gas amount3Multiple oil wells, in tubing string
It connects into gas-liquid separation device, later, average pump efficiency improves 5.9%.By taking a specific oil well as an example, Figure 10 is to implement at one
Daily flow curve before and after access gas-liquid separation device in example, it is as shown in Figure 10, bent for the daily output of two mouthfuls of oil wells in Figure 10
Line, the curve being located above corresponding oil well day arrange tail gas 3799Nm3, daily output liquid 3t, day oil-producing 0.8t, aqueous 73%,
Pump efficiency 17.3%, the daily output liquid 16.6t after one of oil well access gas-liquid separation device at 241 days or so, day oil-producing 3.5t,
Aqueous 82%, pump efficiency 60.1% achieves better effects.Another oil well does not take measures then still to continue to produce, can be with
See that its day oil-producing is not obviously improved.
The application has carried out existing process flow excellent aiming at the problem that Development characteristics and tail gas of fireflood oil reservoir are brought
Change, realizes defeated, the safe outlet of gas-liquid point, guarantee the safety of gathering system.Meanwhile tail gas treatment process is transformed,
Parallel connection is changed to traditional series connection of digester 5, while increasing the internal diameter of pipeline before desulfurizing tower 4, reduces getter resistance,
The processing capacity of desulfurizing tower 4 is increased, vent gas treatment speed is improved, finally improves well yield.In addition, right in the application
The various phenomenons that fireflood oil well occurs in operation propose corresponding measure processing, are pacified with perfect regulation, elimination to tail gas
Full hidden danger, it is ensured that firewire uniformly promotes.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.Describing combined term " substantially by ... constitute " should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.Multiple element, ingredient, component or step can be mentioned by single integrated component, ingredient, component or step
For.Alternatively, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation
Suddenly.For describe the open "a" or "an" of element, ingredient, component or step do not say in order to exclude other elements, at
Point, component or step.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.Above-described embodiment is only
Illustrate the technical ideas and features of the present invention, it is practical new its object is to allow person skilled in the art that can understand this
The content of type is simultaneously implemented accordingly, does not limit the protection scope of the present invention.It is all real according to the spirit of the present invention
Equivalent change or modification made by matter, should be covered within the scope of the utility model.
Claims (10)
1. a kind of processing system of fireflood high exhaust gas well, which is characterized in that the processing system of the fireflood high exhaust gas well includes:
Rotational flow type gas-liquid separater for being connected with production wellhead, the rotational flow type gas-liquid separater is for reducing oil recovery certainly
Water content in the tail gas of well head input；
The air cooler being connected with the rotational flow type gas-liquid separater, the arrival end of the rotational flow type gas-liquid separater can with it is described
The outlet end of air cooler is connected；
The desulfurizing tower and digester being connected with the air cooler, the digester are multiple, multiple digester parallel connections companies
It connects.
2. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the fireflood high exhaust gas well
Processing system further include:
Device for recycling sewage, the device for recycling sewage respectively with the water out of the rotational flow type gas-liquid separater, described air-cooled
The water out of device, the desulfurizing tower water out be connected.
3. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the spiral-flow type gas-liquid separation
Device is used to collect tail gas from the production wellhead.
4. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the desulfurizing tower and the sky
Have on pipeline between cooler can pipe point, the digester with it is described can pipe point be connected, the meeting pipe point is to described air-cooled
The internal diameter of pipeline between device is more than or equal to two cun.
5. the processing system of fireflood high exhaust gas well according to claim 4, which is characterized in that the meeting pipe point takes off to described
The internal diameter of pipeline between sulphur tower is more than or equal to 3 cun.
6. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the spiral-flow type gas-liquid separation
Device with the sleeve gate of the production wellhead for being connected.
7. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the spiral-flow type gas-liquid separation
Switch valve is provided on pipeline between the arrival end of device and the outlet end of the air cooler.
8. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the fireflood high exhaust gas well
Processing system further include:
Production station, the production station are connected with the producing well, what the production station was used to export collected from the producing well
Crude oil；
The gathering station being connected with the production station.
9. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that the digester desulfurization heel row
The H in gas put2S content is in 1.4mg/m3To 4.3mg/m3Between.
10. the processing system of fireflood high exhaust gas well according to claim 1, which is characterized in that after the desulfurizing tower desulfurization
H in the gas of discharge2S content is in 1.4mg/m3To 4.3mg/m3Between.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108392958A (en) * | 2018-03-07 | 2018-08-14 | 中国石油天然气股份有限公司 | The processing system and its method of fireflood high exhaust gas well |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108392958A (en) * | 2018-03-07 | 2018-08-14 | 中国石油天然气股份有限公司 | The processing system and its method of fireflood high exhaust gas well |
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