CN106121609A - Destroy the method for interlayer near horizontal well - Google Patents
Destroy the method for interlayer near horizontal well Download PDFInfo
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- CN106121609A CN106121609A CN201610647253.7A CN201610647253A CN106121609A CN 106121609 A CN106121609 A CN 106121609A CN 201610647253 A CN201610647253 A CN 201610647253A CN 106121609 A CN106121609 A CN 106121609A
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- 239000011229 interlayer Substances 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010793 Steam injection (oil industry) Methods 0.000 claims abstract description 145
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000009833 condensation Methods 0.000 claims abstract description 7
- 230000005494 condensation Effects 0.000 claims abstract description 7
- 230000006378 damage Effects 0.000 claims description 12
- 229920006395 saturated elastomer Polymers 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 5
- 238000010025 steaming Methods 0.000 claims description 4
- 239000011435 rock Substances 0.000 abstract description 9
- 230000035939 shock Effects 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009835 boiling Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 11
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000001066 destructive effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2406—Steam assisted gravity drainage [SAGD]
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fodder In General (AREA)
- Meat, Egg Or Seafood Products (AREA)
Abstract
This application provides and a kind of destroy the method for interlayer near horizontal well, comprise the steps: to arrange the first horizontal well and the second horizontal well, one of the first horizontal well or the second horizontal well are steam injection well, and another is producing well.In the first horizontal well and the second horizontal well, it is injected simultaneously into steam and discharge opeing according to the first pre-defined rule.Stopping the first horizontal well discharge opeing and carry out the first horizontal well boiling in a covered pot over a slow fire well, so that forming the liquid stream less than vapor (steam) temperature after the steam condensation in the first horizontal well, and then making formation low-pressure area in the first horizontal well.Re-injecting steam according to the second pre-defined rule in the first horizontal well, so that this steam quickly flows to low-pressure area, and promote liquid stream to form surge in the first horizontal well, surge mutually collides generation shock wave, and then destroys the interlayer near the first horizontal well.The present invention can produce pressure surge in local, the interlayer rock near horizontal well can be produced impact, reaches to destroy between well and the effect of steam injection aboveground side interlayer rock.
Description
Technical field
The application belongs to technical field of petroleum extraction, is specifically related to a kind of destroy the method for interlayer near horizontal well.
Background technology
Current SAGD (SAGD) is that effective economy of super-viscous oil employs one of means.SAGD's is the most former
Reason is to be injected steam in oil reservoir by injection well, by the conduction of heat heating oil deposit deep part of steam with viscous crude.Viscous crude is viscous after being heated
Degree declines to a great extent, and leaks in producing well under gravity together with condensed water.Along with the continuous extraction of crude oil, inject steam to
Top and shifted laterally, vapor chamber gradually expands.
But at home and abroad have been carried out in the oil reservoir of SAGD exploitation, the problem that generally there is interlayer.As it is shown in figure 1, folder
The appearance of layer rock seriously limits lets out under the vertical extension of vapor chamber, the crude oil that is heated and the equilibrium growth of vapor chamber, leads
Cause to face during the oil reservoir that SAGD exploitation interlayer grows that oil-gas ratio is on the low side, the most high disadvantageous situation of oil-producing speed.Especially near well
The interlayer rock in area, significantly limit the vapor chamber Rapid development process to top, is delayed the arrival of peak-production.
Summary of the invention
In order to overcome the drawbacks described above of prior art, the technical problem to be solved is to provide a kind of destruction level
The method of interlayer near well, it can destroy the interlayer rock of the strong bonding of near wellbore zone, low porosity and low permeability.
The concrete technical scheme of the present invention is:
The present invention provides a kind of and destroys the method for interlayer near horizontal well, comprises the steps:
Arrange that the first horizontal well and the second horizontal well, one of described first horizontal well or described second horizontal well are steam injection
Well, another is producing well, and the horizontal segment of described steam injection well is higher than the horizontal segment of described producing well；
In described first horizontal well and described second horizontal well, it is injected simultaneously into steam and discharge opeing according to the first pre-defined rule；
Stop described first horizontal well discharge opeing and described first horizontal well is carried out stewing well, so that described first level
Form the liquid stream less than vapor (steam) temperature after steam condensation in well, and then make formation low-pressure area in described first horizontal well；
In described first horizontal well, steam is re-injected according to the second pre-defined rule, so that in described first horizontal well
Form surge, thus destroy the interlayer near described first horizontal well.
In one embodiment, described first pre-defined rule is: to described first horizontal well and described second horizontal well
Inside it is injected simultaneously into steam the discharge opeing of 212 DEG C；Steam injection pressure is 2MPa, and individual well steam injection flow is 50 ton day, and the steam injection time is 10
My god.
In one embodiment, described second pre-defined rule is: in described first horizontal well, injection 212 DEG C is saturated
Steam, steam injection flow is 50 ton day, and steam injection amount is 50 tons.
In one embodiment, described first pre-defined rule is: to described first horizontal well and described second horizontal well
Inside being injected simultaneously into steam the discharge opeing of 212 DEG C, steam injection pressure is 2MPa, and individual well steam injection flow is 50 ton day, and the steam injection time is 50
My god.
In one embodiment, described second pre-defined rule is: in described first horizontal well, injection 230 DEG C is saturated
Steam, steam injection flow is 100 ton day, and steam injection amount is 200 tons.
In one embodiment, described first horizontal well and the horizontal section length of described second horizontal well and borehole diameter
Ratio be all higher than 25.
In one embodiment, injecting steam according to the 3rd pre-defined rule in described steam injection well, described producing well enters
Row discharge opeing；
Stop described steam injection well injecting steam and described steam injection well carrying out stewing well, and stop described producing well is carried out
Discharge opeing, flows to described producing well so that being formed after the steam condensation in described steam injection well less than the liquid stream of vapor (steam) temperature, and then
Make the liquid stream in described producing well gradually increase on return to described steam injection well, make described steam injection well formed low-pressure area；
In described steam injection well, steam is re-injected, so that forming wave in described steam injection well according to the 4th pre-defined rule
Gush, thus destroy the interlayer of the aboveground side of described steam injection.
In one embodiment, described 3rd pre-defined rule is: inject the steam of 212 DEG C, note in described steam injection well
Steam pressure is 2MPa, and steam injection flow is 100 ton day, and the steam injection time is 10 days.
In one embodiment, described 4th pre-defined rule is: inject the saturated steaming of 230 DEG C in described steam injection well
Vapour, steam injection flow is 100 ton day, and steam injection amount is 200 tons.
In one embodiment, the vapor (steam) temperature re-injected is higher than described fluid temperature more than 25 DEG C.
By above technical scheme, the application has the beneficial effects that: by pressing from both sides near the destruction horizontal well of the present invention
The method of layer can produce the pressure surge of several 10 times of steam injection pressures in local, can be to the cementing interlayer rock near horizontal well
Stone produces impact, reaches to destroy between well and the effect of steam injection aboveground side interlayer rock, thus improves the speed of Jing Jian UNICOM, significantly
Accelerate SAGD later stage vapour chamber rate of development and the harmony of vapour chamber growth, improve the economy of SAGD project.
With reference to explanation hereinafter and accompanying drawing, disclose in detail the particular implementation of the application, specify the former of the application
Reason can be in adopted mode.It should be understood that presently filed embodiment is not so limited in scope.In appended power
In the range of the spirit and terms that profit requires, presently filed embodiment includes many changes, revises and be equal to.
The feature described for a kind of embodiment and/or illustrate can be in same or similar mode one or more
Other embodiment individual uses, combined with the feature in other embodiment, or substitute the feature in other embodiment.
It should be emphasized that term " includes/comprises " existence referring to feature, one integral piece, step or assembly herein when using, but also
It is not excluded for the existence of one or more further feature, one integral piece, step or assembly or additional.
Accompanying drawing explanation
Accompanying drawing described here is only used for task of explanation, and is not intended to limit model disclosed in the present application by any way
Enclose.It addition, the shape of each parts in figure and proportional sizes etc. are only schematically, it is adapted to assist in the understanding to the application, and
It not shape and the proportional sizes specifically limiting each parts of the application.Those skilled in the art, can under teachings of the present application
To select various possible shape and proportional sizes to implement the application as the case may be.In the accompanying drawings:
Fig. 1 is that between the aboveground side of steam injection and well, interbed distribution have impact on the vertical growth of vapor chamber and the schematic diagram of gravity drainage；
Fig. 2 is the process schematic of impact failure interlayer in the application embodiment；
The schematic diagram of steam it is full of in steam injection well when Fig. 3 a is to be normally carried out SAGD operation；
Fig. 3 b is that producing well limits the interior schematic diagram for liquid-vapor mixture of steam injection well after discharge opeing；
Fig. 4 a is the Mezzanine Map that impact cutting destroys the aboveground side of steam injection；
Fig. 4 b is that shock wave destroys Mezzanine Map between well；
Fig. 5 is the method flow diagram of interlayer near the destruction horizontal well of the application embodiment.
The reference of the figures above: 1, steam injection well；2, producing well
Detailed description of the invention
Below in conjunction with the accompanying drawing in the application embodiment, the technical scheme in the application embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the application rather than whole realities
Execute mode.Based on the embodiment in the application, those of ordinary skill in the art are institute under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of the application protection.
It should be noted that when element is referred to as " being arranged at " another element, and it can be directly on another element
Or element placed in the middle can also be there is.When an element is considered as " connection " another element, and it can be to be directly connected to
To another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", " left ",
For illustrative purposes only, being not offered as is unique embodiment for " right " and similar statement.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the application
The implication that technical staff is generally understood that is identical.Term used in the description of the present application is intended merely to describe tool herein
The purpose of the embodiment of body, it is not intended that in limiting the application.Term as used herein "and/or" includes one or more
Arbitrary and all of combination of relevant Listed Items.
As it is shown in figure 5, the application provides a kind of destroys the method for interlayer near horizontal well, comprise the steps:
S1: arrange that the first horizontal well and the second horizontal well, one of described first horizontal well or described second horizontal well are
Steam injection well 1, another is producing well 2, and the horizontal segment of described steam injection well 1 is higher than the horizontal segment of described producing well 2.
S2: be injected simultaneously into steam side by side in described first horizontal well and described second horizontal well according to the first pre-defined rule
Liquid.
S3: stop described first horizontal well discharge opeing and described first horizontal well is carried out stewing well, so that described first
Form the liquid stream less than vapor (steam) temperature after steam condensation in horizontal well, and then make formation low pressure in described first horizontal well
District.
S4: re-inject steam in described first horizontal well according to the second pre-defined rule, so that described first level
Form surge in well, thus destroy the interlayer near described first horizontal well.
In the present embodiment, in oil reservoir, dual horizontal well, the i.e. first horizontal well and the second horizontal well are first arranged.Described
One of first horizontal well or described second horizontal well are steam injection well 1, and another is producing well 2, does not the most do
Concrete restriction, as long as meeting the horizontal segment horizontal segment higher than producing well 2 of steam injection well 1.Such as, if the first horizontal well can
Think steam injection well 1, then the second horizontal well is producing well 2.Or, the first horizontal well can be producing well 2, then the second horizontal well
It is steam injection well 1.Specifically, if the reservoir buried depth of oil reservoir is 200 meters, core intersection is 25 meters, then can be arranged by producing well 2
At above bottom distance oil reservoir 1 meter, steam injection well 1 is arranged in above producing well 2 at 5 meters.And to meet first
The horizontal section length of horizontal well and the second horizontal well and the ratio of borehole diameter are both greater than 25.Such as the first horizontal well and the second water
The horizontal section length of horizontal well can be 400 meters, and borehole diameter can be 0.25 meter.
It is now assumed that the first horizontal well is steam injection well 1, the second horizontal well is producing well 2.First to steam injection well 1 and producing well 2
Between be positioned at around gas injection well or producing well 2 and transform less than the interlayer of 1 meter.
In steam injection well 1 and producing well 2, it is injected simultaneously into steam and discharge opeing according to the first pre-defined rule.It is to say, simultaneously
Steam injection well 1 and producing well 2 are circulated preheating, and the steam being i.e. injected simultaneously into 212 DEG C in steam injection well 1 and producing well 2 is gone forward side by side
Row discharge opeing, steam injection pressure is 2MPa, and individual well steam injection flow is 50 ton day, and the steam injection time is 10 days.
After circulation preheating (inject steam and carry out discharge opeing) 10 days, stop steam injection well 1 discharge opeing, and slowly reduce steam
Steam injection amount, until carrying out stewing well to described steam injection well 1.Producing well 2 proceeds circulation preheating (inject steam and carry out discharge opeing).
So so that the steam in steam injection well 1 condenses, form the liquid stream less than vapor (steam) temperature, non-solidifying owing to not having in steam injection well 1
Stagnation of QI body, and then make the pressure drop in steam injection well 1, form area of low pressure.
When dropping to about 180 DEG C at a temperature of liquid stream in steam injection well 1, can be according to the second pre-defined rule to steam injection well 1
Inside re-injecting steam, at this moment the temperature of steam should meet the temperature more than 25 DEG C higher than this liquid stream.I.e. can be to described steam injection
Injecting the saturated vapor of 212 DEG C in well 1, steam injection flow is 50 ton day, and steam injection amount is 50 tons.Make the steam that re-injects to
Described low-pressure area quickly flows, and promotes the liquid stream bottom steam injection well 1 to form surge in described first horizontal well.When surge foot
Time the strongest, refer to accompanying drawing 2 and accompanying drawing 4b, the sealing of local can be formed in steam injection well 1.When both sides surge is with flank speed
Meeting, this surge can mutually collide and produce powerful shock wave, and then destroys the interlayer (less than 1 meter) near described steam injection well 1,
So interlayer (less than 1 meter) near steam injection well 1 is the most destroyed.
Now, producing well 2 can stop circulation preheating (inject steam and carry out discharge opeing) operation, changes stewing well into.Complete note
Near vapour well 1 after interlayer transformation, steam injection well 1 enabling, it is continuously injected into steam, carries out interlayer near producing well 2
Destroy.Interlayer near producing well 2 transforms the similar process that near destructive process and above-mentioned injection well, interlayer transformation destroys, at this
Repeat no more.
If the interlayer being positioned between steam injection well 1 and producing well 2 around gas injection well or producing well 2 more than 2.5 meters is changed
Make, then need to change the first pre-defined rule and the second pre-defined rule.
Specifically, will be injected simultaneously into the steam of 212 DEG C and carry out discharge opeing in steam injection well 1 and producing well 2, steam injection pressure is
2MPa, individual well steam injection flow is 50 ton day, and the steam injection time is 50 days.After circulation preheating (inject steam and carry out discharge opeing) 50 days,
Stop steam injection well 1 discharge opeing, and slowly reduce the steam injection amount of steam, until described steam injection well 1 to be carried out stewing well.Producing well 2 continues
Continue and be circulated preheating (inject steam and also carry out discharge opeing).So so that the steam in steam injection well 1 condenses, formed less than steaming
The liquid stream of stripping temperature, owing to not having non-condensing gas in steam injection well 1, and then makes the pressure drop in steam injection well 1, forms low pressure
Region.
When dropping to about 205 DEG C at a temperature of liquid stream in steam injection well 1, can be according to the second pre-defined rule to steam injection well 1
Inside re-injecting steam, at this moment the temperature of steam also should meet the temperature more than 25 DEG C higher than this liquid stream.I.e. can be to described note
Injecting the saturated vapor of 230 DEG C in vapour well 1, steam injection flow is 100 ton day, and steam injection amount is 200 tons.Make the steaming re-injected
Vapour quickly flows to described low-pressure area, and promotes the liquid stream bottom steam injection well 1 to form surge in described first horizontal well.Work as wave
When gushing sufficiently strong, refer to accompanying drawing 2 and accompanying drawing 4b, the sealing of local can be formed in steam injection well 1.When both sides surge is with high
Speed is met, and this surge can mutually collide and produce powerful shock wave, and then destroys the interlayer near described steam injection well 1 and (be more than
2.5 meters), the interlayer (more than 2.5 meters) near such steam injection well 1 is the most destroyed.
Equally, near producing well 2, the interlayer of (more than 2.5 meters) transforms interlayer transformation near destructive process and above-mentioned injection well
The similar process destroyed, does not repeats them here.
Owing to the interlayer between steam injection well 1 and producing well 2 being destroyed, make glue between steam injection well 1 and producing well 2
Tying good interlayer rock interior and create through crack, thermal communication between steam injection well 1 and producing well 2 and fluid communication are
Formed.Therefore, the interlayer above steam injection well 1 is transformed, can note in described steam injection well 1 according to the 3rd pre-defined rule
Entering steam, producing well 2 carries out discharge opeing simultaneously.Specifically, the steam of 212 DEG C, steam injection pressure can be injected in described steam injection well 1
For 2MPa, steam injection flow is 100 ton day, and the steam injection time is 10 days.
When, after steam injection 10 days, slowly reducing the steam injection amount of steam injection well 1, until described steam injection well 1 to be carried out stewing well, give birth to simultaneously
Produce well 2 and stop discharge opeing, refer to accompanying drawing 3b (being full of the situation of steam when accompanying drawing 3a is to be normally carried out SAGD operation in steam injection well),
So so that formed after steam condensation in described steam injection well 1 and flow to described producing well 2 less than the liquid stream of vapor (steam) temperature, enter
And make the liquid stream in described producing well 2 gradually increase on return to described steam injection well 1, owing to there is no non-condensing gas in steam injection well 1
Body, in so making described steam injection well 1, pressure reduces, and forms low-pressure area.
When the fluid temperature in steam injection well 1 reaches about 160 DEG C, can be according to the 4th pre-defined rule to described steam injection well
Re-injecting steam in 1, at this moment the temperature of steam should meet the temperature more than 25 DEG C higher than this liquid stream equally.I.e. can be to described
Injecting the saturated vapor of 230 DEG C in steam injection well 1, steam injection flow is 100 ton day, and steam injection amount is 200 tons.Refer to accompanying drawing 2 and attached
Fig. 4 a so that the steam re-injected quickly flows to described low-pressure area, and promote liquid stream to form wave in described steam injection well 1
Gushing, described surge mutually collides and produces powerful shock wave, and then destroys the interlayer above described steam injection well 1.
Meanwhile, producing well 2 discharge opeing, output speed is about 200 ton day.Complete above steam injection well 1 after interlayer transformation,
Steam injection well 1 recovers continuous steam injection, the continuous production fluid of producing well 2.
After using aforesaid operations method, the interlayer rock interior of the strong bonding above steam injection well 1 produces through crack,
During continuous steam injection SAGD subsequently produces, the percolation ability of interlayer slowly improves, and final vapor chamber can be smoothly at steam injection well 1
Top grow.
Herein cited any digital value all include between lower limit to higher limit with the lower value of an incremented and
, between any lower value and any much higher value, there is the interval of at least two unit in all values of upper value.For example, as
Fruit elaborates that the quantity of parts or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 20
To 80, more preferably from 30 to 70, then list such as 15 to 85,22 during purpose illustrates that this description the most clearly and arrive
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These only want the example clearly expressed, it is believed that the institute of the numerical value enumerated between minimum and peak is likely
Combination is expressly set forth in this description the most in a similar manner.
Except as otherwise noted, all scopes all include all numerals between end points and end points.It is used together with scope
" about " or " approximation " be suitable for two end points of this scope.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", the end points indicated at least is included.
The all articles disclosed and reference material, including patent application and publication, for various purposes by quoting knot
Together in this.Describe combination term " substantially by ... constitute " should include determined by element, composition, parts or step and reality
Other elements, composition, parts or the step of the basic novel feature of this combination is not affected in matter.Use term " comprise " or
" include " combination describing element, composition, parts or step here it is also contemplated that basic by these elements, composition, parts
Or the embodiment that step is constituted.Here by use term " can ", it is intended to illustrate that " permissible " include is described any
Attribute is all optional.
Multiple elements, composition, parts or step can be provided by single integrated component, composition, parts or step.Alternative
Ground, single integrated component, composition, parts or step can be divided into multiple elements, composition, parts or the step of separation.It is used for
The open "a" or "an" describing element, composition, parts or step is not said to get rid of other element, composition, parts
Or step.
It should be understood that above description is to illustrate rather than to limit.By reading above-mentioned retouching
Stating, the many embodiments outside the example provided and many application will be the most all aobvious and easy
See.Therefore, the scope of this teaching should not determine with reference to foregoing description, but should with reference to aforementioned claim and this
The four corner of the equivalent that a little claim are had determines.Include specially for comprehensive purpose, all articles and reference
The disclosure of profit application and bulletin is all passed through with reference to being incorporated herein.Theme disclosed herein is omitted in aforementioned claim
Any aspect is not intended to abandon this body matter, also should not be considered as applicant and is not thought of as disclosed by this theme
A part for application theme.
Claims (10)
1. one kind is destroyed the method for interlayer near horizontal well, it is characterised in that comprise the steps:
Arrange that the first horizontal well and the second horizontal well, one of described first horizontal well or described second horizontal well are steam injection well,
Another is producing well, and the horizontal segment of described steam injection well is higher than the horizontal segment of described producing well；
In described first horizontal well and described second horizontal well, it is injected simultaneously into steam and discharge opeing according to the first pre-defined rule；
Stop described first horizontal well discharge opeing and described first horizontal well is carried out stewing well, so that in described first horizontal well
Steam condensation after formed less than the liquid stream of vapor (steam) temperature, and then form low-pressure area in making described first horizontal well；
In described first horizontal well, steam is re-injected, so that being formed in described first horizontal well according to the second pre-defined rule
Surge, thus destroy the interlayer near described first horizontal well.
The method of interlayer near destruction horizontal well the most according to claim 1, it is characterised in that described first pre-defined rule
For: in described first horizontal well and described second horizontal well, it is injected simultaneously into steam the discharge opeing of 212 DEG C；Steam injection pressure is
2MPa, individual well steam injection flow is 50 ton day, and the steam injection time is 10 days.
The method of interlayer near destruction horizontal well the most according to claim 2, it is characterised in that described second pre-defined rule
For: injecting the saturated vapor of 212 DEG C in described first horizontal well, steam injection flow is 50 ton day, and steam injection amount is 50 tons.
The method of interlayer near destruction horizontal well the most according to claim 1, it is characterised in that described first pre-defined rule
For: being injected simultaneously into steam the discharge opeing of 212 DEG C in described first horizontal well and described second horizontal well, steam injection pressure is
2MPa, individual well steam injection flow is 50 ton day, and the steam injection time is 50 days.
The method of interlayer near destruction horizontal well the most according to claim 4, it is characterised in that described second pre-defined rule
For: injecting the saturated vapor of 230 DEG C in described first horizontal well, steam injection flow is 100 ton day, and steam injection amount is 200 tons.
The method of interlayer near destruction horizontal well the most according to claim 1, it is characterised in that described first horizontal well and
The described horizontal section length of the second horizontal well and the ratio of borehole diameter are all higher than 25.
The method of interlayer near destruction horizontal well the most according to claim 1, it is characterised in that
Injecting steam in described steam injection well according to the 3rd pre-defined rule, described producing well carries out discharge opeing；
Stop described steam injection well injecting steam and described steam injection well carrying out stewing well, and stop described producing well is arranged
Liquid, flows to described producing well so that being formed after the steam condensation in described steam injection well less than the liquid stream of vapor (steam) temperature, and then makes
Liquid stream in described producing well gradually increase on return to described steam injection well, make described steam injection well form low-pressure area；
In described steam injection well, steam is re-injected according to the 4th pre-defined rule, so that forming surge in described steam injection well,
Thus destroy the interlayer of the aboveground side of described steam injection.
The method of interlayer near destruction horizontal well the most according to claim 7, it is characterised in that described 3rd pre-defined rule
For: injecting the steam of 212 DEG C in described steam injection well, steam injection pressure is 2MPa, and steam injection flow is 100 ton day, and the steam injection time is
10 days.
The method of interlayer near destruction horizontal well the most according to claim 7, it is characterised in that described 4th pre-defined rule
For: injecting the saturated vapor of 230 DEG C in described steam injection well, steam injection flow is 100 ton day, and steam injection amount is 200 tons.
10. according to the method for interlayer near the destruction horizontal well described in claim 1 or 7, it is characterised in that the steaming re-injected
Stripping temperature is higher than described fluid temperature more than 25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647253.7A CN106121609B (en) | 2016-08-09 | 2016-08-09 | The method for destroying interlayer near horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647253.7A CN106121609B (en) | 2016-08-09 | 2016-08-09 | The method for destroying interlayer near horizontal well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106121609A true CN106121609A (en) | 2016-11-16 |
| CN106121609B CN106121609B (en) | 2018-12-25 |
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| CN201610647253.7A Active CN106121609B (en) | 2016-08-09 | 2016-08-09 | The method for destroying interlayer near horizontal well |
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| CN108708699A (en) * | 2018-05-14 | 2018-10-26 | 中国石油大学(华东) | A kind of super heavy oil development method strengthened SAGD vapor chambers and break through low physical property reservoir |
| CN110821462A (en) * | 2019-10-16 | 2020-02-21 | 新疆中凌工程技术有限公司 | Method for drawing tail end of horizontal well group with interlayer in SAGD control well reservoir |
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| CN106121609B (en) | 2018-12-25 |
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