CN106499347B - A kind of application method of oil recovery flow string - Google Patents
A kind of application method of oil recovery flow string Download PDFInfo
- Publication number
- CN106499347B CN106499347B CN201610960375.1A CN201610960375A CN106499347B CN 106499347 B CN106499347 B CN 106499347B CN 201610960375 A CN201610960375 A CN 201610960375A CN 106499347 B CN106499347 B CN 106499347B
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- oil
- sparger
- inlet opening
- flow string
- application method
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
Abstract
The application method of this high gas-liquid ratio producing well oil recovery flow string of offer of the invention, by increasing sparger on oil pipe, so that foaming agent is generated a large amount of foamover shaft bottom crude oil, in pit shaft under the castering action of formation gas, is lifted to ground upwards along pit shaft.The tubing string makes full use of the natural energy of gas in stratum, realizes the lifting to shaft bottom crude oil, during avoiding conventional pumping unit sucker rod pumping, oil well pump pump efficiency caused by by gases affect in stratum it is low and not go out liquid the problem of.The flow string can cancel the devices such as pumping unit and oil well pump simultaneously, reduce cost of investment, also provide a kind of new mode for producing well lifting.
Description
Technical field
The invention belongs to oil extraction in oil field gas field of engineering technology, and in particular to a kind of oil recovery for being suitble to high gassiness producing well is raw
Produce the application method of tubing string.
Background technique
Gas drive is referred to as using the oil production method of gas as main displacement of reservoir oil medium.Divide according to displacing medium, gas drive is main
There is N2It drives, CO2Drive, air drive, flue gas flooding, lighter hydrocarbons gas drive several types.Theoretical research and domestic and international oil field mining site practice table
Bright, injection gas displacement is a kind of effective mode for improving recovery ratio.The drive of gas injection at present, which has become, to improve in recovery ratio method very
A kind of important technological means.
After oilfield gas injection drives, oil viscosity is reduced, and mobile performance becomes strong, but similarly can also make gassiness in crude oil
Amount increases, and in oil recovery process, gas and crude oil are mixed out, and oil well lifting efficiency is caused to decline.Especially in low liquid measure producing well
On, when gas content is excessively high in in-place oil, it may appear that gas production is greater than the phenomenon that oil production, at this moment the pumping in lifting column
Gas lock can occur for oil pump, can not work, and in-place oil can not be lifted to ground, and oil well output sharply declines, and also just lose gas
It drives to recover the oil and improves the purpose of yield.
Summary of the invention
Present invention aim to address high gassiness producing well, there are the oil well pumps in lifting column, and gas lock, Wu Fagong occurs
The problem of making, causing in-place oil that can not be lifted to ground.
For this purpose, the present invention provides a kind of oil recovery flow string, including the oil flow production well head below production tree, it is described from
Spray and be connected to more capillary tubings in the casing threeway of production wellhead, all capillary tubings extend downwardly into oil pipe and casing it
Between annular space in, the outer wall of capillary tubing side is bonded with oil-pipe external wall, and the oil pipe is made of multiple-tubing string pipe nipple, phase
Sparger is installed between adjacent tubing nipple, the end of capillary tubing is fixed on the lowermost sparger, oil pipe
Lower end is connected with floral tube, and floral tube is close to the lowermost sparger；
The oil flow production well head is also equipped with plunger pump.
Inlet opening and lower inlet opening are offered on the sparger, upper inlet opening and lower inlet opening are close in oil pipe
Wall.
The sparger is by shell and the intracorporal helical stirrer of shell and memory-type lithium battery group at helical form
Blender is connect with memory-type lithium battery.
Spherical ball-and-seat is mounted at the upper inlet opening and lower inlet opening.
The capillary tubing is fixed on oil-pipe external wall by square clamp.
The capillary tubing is made of stainless steel 304, and internal diameter is 4~10mm.
The outer diameter of the sparger is consistent with oil pipe outer diameter, and the two passes through screwed connection.
A kind of application method of flow string, includes the following steps：
Step 1, prefabricated flow string, and G.I.H；
Step 2, open plunger pump, foaming agent is pumped into capillary tubing, a part of foaming agent with upper inlet opening and under into
Fluid apertures is flow in sparger, and another part foaming agent is flowed directly in oil jacket annulus along capillary tubing, and the original with shaft bottom
Oil forms mixed liquor, and mixed liquor enters in the sparger of lowermost end through floral tube, and sparger is stirred blistering to mixed liquor,
Liquid after blistering is lifted to oil flow production well head along oil pipe under the action of associated gas in well.
Beneficial effects of the present invention：This high gas-liquid ratio producing well oil recovery flow string of offer of the invention, by
Increase sparger on oil pipe, foaming agent is made to generate a large amount of foamover shaft bottom crude oil, the lifting of formation gas in pit shaft
Under effect, it is lifted to ground upwards along pit shaft.The tubing string makes full use of the natural energy of gas in stratum, realizes to shaft bottom original
The lifting of oil, during avoiding conventional pumping unit sucker rod pumping, oil well pump pump efficiency caused by by gases affect in stratum is low
Not the problem of not going out liquid.The flow string can cancel the devices such as pumping unit and oil well pump simultaneously, reduce cost of investment, also to adopt
Oil well lifting provides a kind of new mode.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the shallower high gassiness producing well oil recovery flow string schematic diagram of well depth.
Fig. 2 is the deeper high gassiness producing well oil recovery flow string schematic diagram of well depth.
Description of symbols：1, floral tube；2, oil pipe；3, casing；4, capillary tubing；5, sparger；6, oil flow production well
Mouthful；7, plunger pump；8, upper inlet opening；9, lower inlet opening.
Specific embodiment
Embodiment 1：
In order to solve high gassiness producing well, there are the oil well pumps in lifting column, and gas lock occurs, and can not work, lead to stratum
Crude oil can not be lifted to the problem of ground, a kind of oil recovery flow string be present embodiments provided, including the self-spray below production tree
Production wellhead 6, is connected to more capillary tubings 4 in the casing threeway of the oil flow production well head 6, all capillary tubings 4 to
Under stretch in the annular space between oil pipe 2 and casing 3, the outer wall of 4 side of capillary tubing is bonded with 2 outer wall of oil pipe, described
Oil pipe 2 is made of multiple-tubing string pipe nipple, and sparger 5 is equipped between adjacent tubing nipple, and the end of capillary tubing 4 is fixed
On the lowermost sparger 5, the lower end of oil pipe 2 is connected with floral tube 1, and floral tube 1 is close to the lowermost sparger 5；It is described
Oil flow production well head 6 is also equipped with plunger pump 7.
The course of work of oil recovery flow string is：
On shallow well, since lift height is lower, oil recovery flow string as shown in Figure 1 is present embodiments provided, including
Floral tube 1, oil pipe 2, casing 3, capillary tubing 4, sparger 5, oil flow production well head 6 and plunger pump 7.Two capillary tubings 4 are equal
Down toward the lower section of the sparger 5 of bottom end, foaming agent stream flow to the annular space between oil pipe 2 and casing 3 along capillary tubing
Interior, the crude oil in the annular space between oil pipe 2 and casing 3 forms fluid-mixing, then flows through floral tube 1 and reaches rising for bottom
At bulb apparatus.It is realized using plunger pump 7 and foaming agent is persistently injected to capillary tubing 4, do not occurred in the sparger of lower end
The foaming agent acted on completely that blisters can carry out secondary agitation blistering in the sparger of upper end, and guarantee has enough foams to crude oil
It carries, so that it is guaranteed that lifting effect.
The working principle of oil recovery flow string is：
Realized with the common election active force of associated gas in bubble and pit shaft, mainly by capillary tubing 4 to rise
Foaming agent is injected in bulb apparatus 5, foaming agent is middle under the action of sparger 5 to generate a large amount of bubbles, carries by a large amount of bubbles
Crude oil in pit shaft takes the election effect common with associated gas so that crude oil is run up to production wellhead in pit shaft by blistering.
After boosting crude oil is lifted to ground by foam and associated gas, foam killer filling eliminates the bubble in crude oil at the flow line of ground
Foam, crude oil can enter ground petroleum pipeline.
This high gas-liquid ratio producing well oil recovery flow string of offer of the invention, by increasing blistering dress on oil pipe
It sets, foaming agent is made to generate a large amount of foamover shaft bottom crude oil, it is upward along pit shaft in pit shaft under the castering action of formation gas
It is lifted to ground.The tubing string makes full use of the natural energy of gas in stratum, realizes the lifting to shaft bottom crude oil, avoids often
Advise pumping unit sucker rod pumping during, oil well pump pump efficiency caused by by gases affect in stratum it is low and not out liquid the problem of.Together
When the flow string can cancel the devices such as pumping unit and oil well pump, reduce cost of investment, also for producing well lifting provide one
The new mode of kind.
Embodiment 2：
On the basis of embodiment 1, inlet opening 8 and lower inlet opening 9, upper inlet opening 8 are offered on the sparger 5
2 inner wall of oil pipe is close to lower inlet opening 9.
On deep-well, since lift height is higher, multiple spargers need to be installed, and need supplement to blister in lifting process
Agent, present embodiments provides oil recovery flow string as shown in Figure 2, and plunger pump 7 persistently carries out filling blistering to capillary tubing 4
Agent, foaming agent flow gradually downward along capillary tubing 4, and a part of foaming agent flow to blistering with upper inlet opening 8 and lower inlet opening 9
Device 5；A part of foaming agent is flowed directly to the original in the annular space between oil pipe 2 and casing 3, with shaft bottom along capillary tubing 4
Oil forms mixed liquor.
The crude oil for being mixed with foaming agent enters the lowermost sparger 5 by oil jacket annulus through floral tube 1, and blender opens
Dynamic, foaming agent generates a large amount of blistering, carries crude oil and lifts upwards under the action of the associated gas of stratum along oil pipe.Foamover is former
Oil lifts under the action of associated gas along oil pipe upwards in oil pipe, when being lifted to another sparger 5, sparger 5
The foaming agent of middle filling is continuesd to mix with the crude oil that carrying comes up, and foaming agent generates more foams in sparger, in companion
Crude oil is carried under the action of anger continues up lifting.When crude oil is every passes through a sparger 5, sparger 5 can be right
The crude oil flowed through is stirred, so that every section has enough foamover crude oil, is realized to lift the boosting of crude oil and be made
With until flowing to oil flow production well head 6.
It should be noted that the upper inlet opening 8 and lower inlet opening 9 on sparger 5 can be used for supplementing foaming agent.Described
Infusion is with a kind of compound foaming agent made of a variety of surfactants and adjuvant, in high-temperature stratum（>90℃）Also have
Stronger foamability has the advantages of foam stability is good, and liquid carry over is big, and prop-carrying capacity is strong, oil resistant, salt resistance.
Embodiment 3：
On the basis of embodiment 2, the sparger 5 is by shell and the intracorporal helical stirrer of shell and storage
Formula lithium battery group is at helical stirrer is connect with memory-type lithium battery.
The grade of steel and outer diameter of sparger 5 are identical as oil pipe 2, and length is 10 meters, realize the company with oil pipe 2 by screw thread
It connects.There is helical stirrer inside sparger 5, stirrer-driven power is provided by memory-type lithium battery, when containing foaming agent
When fluid flows through sparger 5, just automatic starting when blender senses liquid flowing makes the foaming agent of liquid quickly become big
Foam, crude oil in foamover pit shaft are measured, boosting downhole well fluid drills oil pipe and goes upward to oil flow production well head.
Sparger 5 specifically goes into the well quantity and position can be set according to the well depth of oil well, Liquid output, gas liquid ratio size
Meter；Under normal conditions, for shallower well sparger tripping in negligible amounts, the underground of well depth, which enters quantity, increased.
Embodiment 4：
On the basis of embodiment 2, spherical ball-and-seat is mounted at the upper inlet opening 8 and lower inlet opening 9.Tubing wall
On capillary tubing 4 special threeway be installed at the upper inlet opening 8 of sparger 5 and lower 9 hole of inlet opening respectively connect, it is real
The connection of the capillary tubing 4 of existing inlet opening and inlet opening upper-lower section guarantees that foaming agent can flow into and requires supplementation with foaming agent
It also can smoothly be flow to while in sparger 5 in the annular space of oil pipe 2 and casing 3.There is spherical ball-and-seat at inlet opening
Controlling flow direction is controlled, foaming agent is smoothly flowed at sparger, and fluid will not return out to oil jacket ring in sparger
Sky, to guarantee that having enough foaming agents that can generate foamover crude oil boosting at each sparger is lifted to ground
Face.
Embodiment 5：
On the basis of embodiment 1, the capillary tubing 4 is made of stainless steel 304, and internal diameter is 4~10mm.Described
The outer diameter of bulb apparatus 5 is consistent with 2 outer diameter of oil pipe, and the two passes through screwed connection.
What capillary tubing 4 was selected is stainless steel 304 capillary, and internal diameter 4-10mm has preferable flexibility, and corrosion resistant
Erosion, high temperature resistant, resistance to eccentric wear.Capillary tubing 4 shares two groups, is respectively positioned in oil jacket annulus, is fixed on oil pipe 2 by using square clamp
On outer wall, and the depth of setting of capillary tubing 4 is consistent with the depth of lowermost end sparger 5.4 head end of capillary tubing is fixed on certainly
In the casing threeway for spraying production wellhead 6, external small-sized plunger pump 7 is to filling foaming agent in capillary tubing 4；End is fixed on tripping in
On most deep sparger 5.Capillary tubing is mounted on spherical ball-and-seat in the position of partly foamed device inlet opening, passes through ball
Shape ball-and-seat controls the flow direction of foaming agent in capillary tubing（It flow to current sparger or continues to flow downward along tube wall）,
There are enough foaming agents to guarantee sparger position.
Embodiment 6：
A kind of application method of flow string, includes the following steps：
Step 1, prefabricated flow string, and G.I.H；
Step 2 is opened plunger pump 7, foaming agent is pumped into capillary tubing 4, a part of foaming agent is with upper 8 He of inlet opening
Lower inlet opening 9 is flow in sparger 5, and another part foaming agent is flowed directly in oil jacket annulus along capillary tubing 4, and and well
The crude oil at bottom forms mixed liquor, and mixed liquor enters through floral tube 1 in the sparger 5 of lowermost end, and sparger 5 carries out mixed liquor
Stirring blistering, the liquid after blistering are lifted to oil flow production well head 6 along oil pipe 2 under the action of associated gas in well.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.The portion that the present embodiment does not describe in detail
The well-known components and common structure or conventional means of part and the structure category industry, do not describe one by one here.
Claims (7)
1. a kind of application method of oil recovery flow string, which is characterized in that oil recovery flow string is used, below production tree
Oil flow production well head（6）, the oil flow production well head（6）Casing threeway on be connected to more capillary tubings（4）, all capillary
Steel pipe（4）It extends downwardly into oil pipe（2）And casing（3）Between annular space in, capillary tubing（4）The outer wall and oil of side
Pipe（2）Outer wall fitting, the oil pipe（2）It is made of multiple-tubing string pipe nipple, sparger is installed between adjacent tubing nipple
（5）, capillary tubing（4）End be fixed on the lowermost sparger（5）On, oil pipe（2）Lower end be connected with floral tube（1）,
Floral tube（1）Close to the lowermost sparger（5）；The oil flow production well head（6）It is also equipped with plunger pump（7）；
It further include following steps：
Step 1, prefabricated flow string, and G.I.H；
Step 2 opens plunger pump（7）, foaming agent is pumped into capillary tubing（4）Interior, a part of foaming agent is with upper inlet opening（8）
With lower inlet opening（9）It flow to sparger（5）Interior, another part foaming agent is along capillary tubing（4）It is flowed directly to oil jacket annulus
It is interior, and mixed liquor is formed with the crude oil in shaft bottom, mixed liquor is through floral tube（1）Into the sparger of lowermost end（5）It is interior, sparger
（5）Blistering is stirred to mixed liquor, foamover crude oil is in oil pipe（2）Along oil pipe under the action of interior associated gas（2）It lifts upwards
It rises, when being lifted to another sparger（5）When, sparger（5）The crude oil that the foaming agent of middle filling and carrying come up after
Continuous mixing, foaming agent is in sparger（5）It is middle to generate more foams, liquid after blistering edge under the action of associated gas in well
Oil pipe（2）It is lifted to oil flow production well head（6）.
2. the application method of oil recovery flow string as described in claim 1, it is characterised in that：The sparger（5）On open
Equipped with upper inlet opening（8）With lower inlet opening（9）, upper inlet opening（8）With lower inlet opening（9）It is close to oil pipe（2）Inner wall.
3. the application method of oil recovery flow string as claimed in claim 2, it is characterised in that：The sparger（5）By shell
Body and the intracorporal helical stirrer of shell and memory-type lithium battery group are at helical stirrer is electrically connected with memory-type lithium battery
It connects.
4. the application method of oil recovery flow string as claimed in claim 2, it is characterised in that：The upper inlet opening（8）With under
Inlet opening（9）Place is mounted on spherical ball-and-seat.
5. the application method of oil recovery flow string as described in claim 1, it is characterised in that：The capillary tubing（4）Pass through
Fang Kazi is fixed on oil pipe（2）Outer wall.
6. the application method of oil recovery flow string as described in claim 1, it is characterised in that：The capillary tubing（4）Using
Stainless steel 304 is made, and internal diameter is 4~10mm.
7. the application method of oil recovery flow string as described in claim 1, it is characterised in that：The sparger（5）It is outer
Diameter and oil pipe（2）Outer diameter is consistent, and the two passes through screwed connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960375.1A CN106499347B (en) | 2016-10-28 | 2016-10-28 | A kind of application method of oil recovery flow string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610960375.1A CN106499347B (en) | 2016-10-28 | 2016-10-28 | A kind of application method of oil recovery flow string |
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| CN106499347A CN106499347A (en) | 2017-03-15 |
| CN106499347B true CN106499347B (en) | 2018-11-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112253053B (en) * | 2020-11-02 | 2022-06-10 | 东北石油大学 | Foaming device and oil recovery lifting devices |
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2016
- 2016-10-28 CN CN201610960375.1A patent/CN106499347B/en active Active
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| CN102305055A (en) * | 2011-08-10 | 2012-01-04 | 中国石油天然气股份有限公司 | Air foam flooding shaft bottom foaming process pipe column |
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| CN102747993A (en) * | 2012-06-27 | 2012-10-24 | 中国石油大学(华东) | Liquid foaming agent injection method |
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