CN106988681A - A kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well - Google Patents
A kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well Download PDFInfo
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- CN106988681A CN106988681A CN201710435276.6A CN201710435276A CN106988681A CN 106988681 A CN106988681 A CN 106988681A CN 201710435276 A CN201710435276 A CN 201710435276A CN 106988681 A CN106988681 A CN 106988681A
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- 239000012530 fluid Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 39
- 239000007924 injection Substances 0.000 claims abstract description 39
- 239000010410 layer Substances 0.000 claims abstract description 26
- 239000011440 grout Substances 0.000 claims abstract description 23
- 229910052901 montmorillonite Inorganic materials 0.000 claims abstract description 21
- 239000004568 cement Substances 0.000 claims abstract description 20
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 239000011241 protective layer Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 238000007711 solidification Methods 0.000 claims abstract description 8
- 230000008023 solidification Effects 0.000 claims abstract description 8
- 235000007164 Oryza sativa Nutrition 0.000 claims description 16
- 235000009566 rice Nutrition 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 8
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 240000007594 Oryza sativa Species 0.000 claims 1
- 230000005465 channeling Effects 0.000 abstract description 7
- 230000006378 damage Effects 0.000 abstract description 4
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 35
- 241000209094 Oryza Species 0.000 description 15
- 239000007789 gas Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices or the like for cementing casings into boreholes
-
- 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
-
- 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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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)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, is related to oil and gas production, and completion belongs to field of petroleum exploitation.The technique includes：In oilfield drilling; reaming bit formation bottom reaming section is changed during 50 300 meters away from target oil reservoir of drill bit; straight well section is drilled complete rear tripping in sleeve pipe and adds grout off layer; the plugged zone is cement and montmorillonite mixture; after after grout off layer solidification; continue to pierce net horizontal section and carry out perforation completion operation, take staged perforation, and add injection protective layer in straight well section and horizontal segment connecting place；The present invention can effectively prevent from noting the injury that high-temperature steam causes grout off layer and pit shaft when mixed phase hot fluid recovers the oil, extend the service life of pit shaft by arranging grout off layer in underground；Net horizontal section takes staged perforation, can be more uniformly distributed the mixed phase hot fluid branch in injection oil reservoir, reduces the probability for occurring has channeling.
Description
Technical field
Oil and gas is produced, completion, belongs to field of petroleum exploitation.
Background technology
The exploitation of current heavy crude reservoir is basic based on thermal recovery, mainly has steam soak, steam to drive, combustion in situ skill
Art, the spontaneous mixed phase hot fluid oil recovery technique of downhole electric heating technology and underground.
The spontaneous mixed phase hot fluid oil recovery technique cardinal principle in underground is：Bottom, oil reservoir top arrangement well are injected in oil field
Lower mixed phase heated fluid generator, its supporting feed system in ground configuration；Occur by feed system to underground mixed phase hot fluid
Device provides oxidant, fuel and water, mixed phase burning generation high-temperature steam and carbon dioxide is formed in underground, and inject oil reservoir therewith
Carbon dioxide and high-temperature steam in the middle carry out displacement of reservoir oil, mixed phase hot fluid can be modified to crude oil, reduce crude oil in heavy,
Colloid, the content of asphalitine, play a part of reduction viscosity of crude, increase its mobility, make it easier for being plucked out of.
Flue gas and high-temperature steam mixture that mixed phase hot fluid generates for burning, in oil displacement process high temperature mixed phase hot-fluid
Know from experience the grout off layer between contact sleeve pipe and oil reservoir, Long Term Contact can cause irreversible damage to grout off layer, make
Has channeling occurs between packaged tube and stratum, serious can seeing from ground emits vapour, therefore to being drilled well and cementing technology
It is required that higher.
During horizontal well gas-injection, due to the anisotropism on stratum, has channeling easily occurs for gas injection process, forms invalid gas circulation,
Cost for oil production has been significantly greatly increased；When horizontal well injects high temperature fluid, easy aging, burn into perforation, cause well workover at horizontal well heel
Number of times increase, injection fluid sweep area are uneven, significantly increase cost for oil production.
In view of the above-mentioned problems, the present invention provides a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, keep away
Exempt from occur has channeling between sleeve pipe and stratum during mixed phase hot fluid displacement, increase the service life of pit shaft；By adding injection protection
Layer can reduce aging at horizontal well heel, the probability of burn into perforation；Horizontal segment gas injection is more uniformly distributed by staged perforation,
Reduce horizontal segment has channeling probability.
The content of the invention
The embodiment of the present invention provides a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, the technique bag
Include：In oilfield drilling, reaming bit is changed during 50-300 meters away from target oil reservoir of drill bit, continues to pierce by reaming bit
Form oil reservoir reaming section top 50-300 meter high, tripping in sleeve pipe and in sleeve pipe and stratum in the wellbore after straight well section drilling well is finished
Between reaming section add grout off layer, after grout off layer solidification after, continue to pierce net horizontal section, net horizontal section drilling well is complete
Perforation completion operation is carried out after finishing, perforating modes take staged perforation, and in the straight well section and horizontal segment connecting place of horizontal well
Add injection protective layer.
The reaming section mineshaft diameter increases 20-80 centimetres with respect to the non-reaming mineshaft diameter in its top, so that cement is sealed
Blocking layer diameter increase, to reach enhancing seal-off effect, stability action.
The plugged zone is cement and montmorillonite mixture, and montmorillonite mass ratio is that 5-10% remaining composition is cement, institute
E, F grades are stated in cement selection API classifications.
The montmorillonite particle size range is 0.01-0.1 millimeters, and 0.01-0.1 millimeters of particle diameter montmorillonites effectively can uniformly divide
In portion and cement, and montmorillonite has the characteristic of water swelling, when injecting mixed phase hot fluid, if the steaming in mixed phase hot fluid
Vapour enters inside plugged zone through cement, and montmorillonite can effectively absorb steam and expand, to block follow-up steam to permeate, and
After the montmorillonite of 0.01-0.1 millimeters of particle diameters, plugged zone will not be caused harm.
The staged perforation is specially horizontal segment perforation completion, and it is isometric four that horizontal segment is punished from tiptoe to heel
Section, and the ratio between four sections of shot densities are 4:3:2:1, shot density is 10-60 holes/rice, by staged perforating modes, can make note
Horizontal segment air-breathing is more uniformly distributed during gas, it is to avoid cause has channeling, and specific shot density can be fitted according to stratum actual conditions
Work as adjustment.
The injection protective layer is that the smooth high temperature resistant stainless steel body in surface is constituted, and 5-10 millimeters of thickness, 5-30 meters of length rises
Sleeve pipe is not by mixed phase hot fluid corrosiveness to level of protection well heel.
The beneficial effect of the embodiment of the present invention is：1) present invention process by reaming section is formed in underground and in sleeve pipe and
Add grout off layer in the middle of stratum, it is more firm that reaming section grout off layer compares traditional well completion cement plugged zone, closure effect
Fruit is more notable；2) high-temperature steam is to water when can effectively prevent that note mixed phase hot fluid from recovering the oil using the characteristic of montmorillonite
The injury that mudding blocking layer and pit shaft are caused, extends the service life of pit shaft；3) by adding injection protective layer in artificial bottom of a well, subtract
Corrosion during note mixed phase hot fluid to shaft bottom, extends pit shaft service life less；4) net horizontal section takes staged perforation, can be effective
Has channeling is avoided, the mixed phase hot fluid branch in injection oil reservoir is more uniformly distributed.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, makes required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those skilled in the art, it can also be obtained on the premise of not paying creative work according to these accompanying drawings other attached
Figure.
Fig. 1 is a kind of well-completing process underground schematic diagram of the spontaneous mixed phase hot fluid oil production method of horizontal well.
Fig. 2 is horizontal segment staged perforation schematic diagram.
Fig. 3-5 is horizontal-well network arrangement schematic diagram.
Drawing reference numeral：1st, sleeve pipe 2, horizontal well straight well section 3, oil reservoir 4, horizontal well horizontal segment 5, reaming section 6, cement
Plugged zone 7, injection protective layer 8, first level section the 9, second horizontal segment 10, the 3rd horizontal segment, 11 the 4th horizontal segments 12,
Horizontal segment perforation 13, horizontal injection well 14, horizontal production well.
Embodiment
The embodiment of the present invention provides a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, the technique bag
Include：In drillng operation, reaming bit is changed during 50-300 meters away from target oil reservoir of drill bit, continues to pierce by reaming bit to be formed
Oil reservoir top reaming section 50-300 meters high, tripping in sleeve pipe and between sleeve pipe and stratum in the wellbore after straight well section drilling well is finished
Reaming section add grout off layer, after grout off layer solidification after, continue to pierce net horizontal section, after net horizontal section drilling well is finished
Perforation completion operation is carried out, perforating modes take staged perforation, and are added in the straight well section and horizontal segment connecting place of horizontal well
Spray protective layer.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this
Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example is applied, the scope of protection of the invention is belonged to.
The embodiments of the invention provide a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, the technique
Comprise the following steps：
Step one：As shown in figure 1, during drillng operation, reaming bit is changed during 50-300 meters away from target oil reservoir of drill bit, is passed through
Reaming bit continues to pierce to form the reaming section 5 top 50-300 meters high of oil reservoir 3, the non-reaming pit shaft in its relative top of reaming section 5
Diameter amplification adds 20-80 centimetres.
Step 2：Tripping in sleeve pipe 1 and the reaming section 5 between sleeve pipe 1 and stratum in the wellbore after straight well 2 drilling wells of section are finished
Add grout off layer 6, grout off layer 6 is cement and montmorillonite mixture, montmorillonite mass ratio be 5-10% remaining
Composition is cement, and E, F grades in the cement selection API classifications, the montmorillonite particle diameter is 0.01-0.1 millimeters.
Step 3：After after grout off layer solidification, continue to pierce net horizontal section 4, the drilling well of net horizontal section 4 is penetrated after finishing
Hole completion practice, perforating modes take staged perforation, as shown in Fig. 2 staged perforation be specially by horizontal segment from tiptoe
It is isometric four sections to heel punishment, and the ratio between four sections of shot densities are 4:3:2:1, shot density is 10-60 holes/rice.
Step 4：Injection protective layer 7 is added in the straight well section and horizontal segment connecting place of horizontal well, injection protective layer 7 is table
The smooth high temperature resistant stainless steel body in face is constituted, 5-10 millimeters of thickness, 5-30 meters of length, play at level of protection well heel sleeve pipe not by
Mixed phase hot fluid corrosiveness.
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1：
One, certain oil field block, 2250 meters of reservoir depth, 10 meters of core intersection, the mpas of viscosity of crude 20000, well spacing side
Formula horizontal-well network, as shown in figure 3, horizontal injection well is distributed in the same direction with horizontal production well, horizontal injection well horizontal segment is given birth to level
Produce well horizontal segment to be distributed in transversion malposition, and be located at 300 meters of rear, level at horizontal production well heel at horizontal injection well heel
Segment length is 1000 meters, 400-500 meters away from producing well of injection well, the present embodiment injection well away from 420 meters nearer of producing well, away from compared with
470 meters of remote producing well, the ton day of design injection mixed phase hot fluid 100, mixed phase hot fluid temperature is 300 degree.
Step one：During drillng operation, reaming bit is changed during 220 meters away from target oil reservoir of drill bit, is continued by reaming bit
Pierce to form oil reservoir top reaming section 220 meters high, reaming section mineshaft diameter is with respect to the non-reaming mineshaft diameter increase by 50 in its top
Centimetre.
Step 2：Tripping in sleeve pipe in the wellbore after straight well section drilling well is finished, sleeve pipe and reaming section arranged concentric, and in sleeve pipe
It is that 7% remaining composition is cement that reaming section between stratum, which adds montmorillonite mass ratio in grout off layer, the plugged zone,
F grades in cement selection API classifications, the montmorillonite particle diameter is 0.05 millimeter.
Step 3：After after grout off layer solidification, continue to pierce net horizontal section, net horizontal section drilling well carries out perforation after finishing
Completion practice, perforating modes take staged perforation, and staged perforation is specially to punish horizontal segment for 4 to heel from tiptoe
Section, as shown in Fig. 2 first level section shot density is 10 holes/rice, the second horizontal segment shot density is 20 holes/rice, the 3rd level
Section shot density is 30 holes/rice, and the 4th horizontal segment shot density is 40 holes/rice.
Step 4：Injection protective layer is added in the straight well section and horizontal segment connecting place of horizontal well, injection protective layer material is
High temperature resistant stainless steel, length is 5 meters, and thickness is 5 millimeters.
After the completion of completion practice, mixed phase heated fluid generator and flooding operation can be started under lower going-into-well into pit shaft.
Embodiment 2：
One, certain oil field block, 900 meters of reservoir depth, 12 meters of core intersection, the mpas of viscosity of crude 5600, hole pattern
Horizontal-well network, as shown in figure 4, horizontal injection well is reversely distributed with horizontal production well, horizontal injection well horizontal segment is produced with level
Well horizontal segment to it in being laterally distributed, and horizontal section length is 1100 meters, 500-600 meters away from producing well of injection well, the present embodiment note
Enter 530 meters nearer of producing well of well spacing, away from 580 meters of producing well farther out.The ton day of design injection mixed phase hot fluid 140, mixed phase heat
Fluid temperature (F.T.) is 140 degree.
Step one：During drillng operation, reaming bit is changed during 50 meters away from target oil reservoir of drill bit, passes through reaming bit and continues to bore
Enter to be formed oil reservoir top reaming section 50 meters high, reaming section mineshaft diameter increases by 20 lis with respect to the non-reaming mineshaft diameter in its top
Rice.
Step 2：Tripping in sleeve pipe in the wellbore after straight well section drilling well is finished, sleeve pipe and reaming section arranged concentric, and in sleeve pipe
It is that 5% remaining composition is cement that reaming section between stratum, which adds montmorillonite mass ratio in grout off layer, the plugged zone,
E grades in cement selection API classifications, the montmorillonite particle diameter is 0.1 millimeter.
Step 3：After after grout off layer solidification, continue to pierce net horizontal section, net horizontal section drilling well carries out perforation after finishing
Completion practice, perforating modes take staged perforation, and staged perforation is specially to punish horizontal segment for 4 to heel from tiptoe
Section, as shown in Fig. 2 first level section shot density is 15 holes/rice, the second horizontal segment shot density is 30 holes/rice, the 3rd level
Section shot density is 45 holes/rice, and the 4th horizontal segment shot density is 60 holes/rice.
Step 4：Injection protective layer is added in the straight well section and horizontal segment connecting place of horizontal well, injection protective layer material is
High temperature resistant stainless steel, length is 30 meters, and thickness is 7 millimeters.
After the completion of completion practice, mixed phase heated fluid generator and flooding operation can be started under lower going-into-well into pit shaft.
Embodiment 3：
One, certain oil field block, 3100 meters of reservoir depth, 30 meters of core intersection, the mpas of viscosity of crude 14500, well spacing side
Formula horizontal-well network, as shown in figure 5, horizontal injection well is reversely distributed with horizontal production well, horizontal injection well horizontal segment is given birth to level
Produce well horizontal segment in transversion malposition be distributed, and at horizontal injection well heel with horizontal production well tiptoe in front of 400 meters, horizontal segment
Length is 1300 meters, 700-800 meters away from producing well of injection well, and the present embodiment injection well is away from 720 meters nearer of producing well, away from farther out
800 meters of producing well.The ton day of design injection mixed phase hot fluid 300, mixed phase hot fluid temperature is 240 degree.
The first step：During drillng operation, reaming bit is changed during 300 meters away from target oil reservoir of drill bit, is continued by reaming bit
Pierce to form oil reservoir top reaming section 300 meters high, reaming section mineshaft diameter is with respect to the non-reaming mineshaft diameter increase by 80 in its top
Centimetre.
Step 2：Tripping in sleeve pipe in the wellbore after straight well section drilling well is finished, sleeve pipe and reaming section arranged concentric, and in sleeve pipe
It is that 10% remaining composition is water that reaming section between stratum, which adds montmorillonite mass ratio in grout off layer, the plugged zone,
Mud, F grades in cement selection API classifications, the montmorillonite particle diameter is 0.01 millimeter.
Step 3：After after grout off layer solidification, continue to pierce net horizontal section, net horizontal section drilling well carries out perforation after finishing
Completion practice, perforating modes take staged perforation, and staged perforation is specially to punish horizontal segment for 4 to heel from tiptoe
Section, as shown in Fig. 2 first level section shot density is 12 holes/rice, the second horizontal segment shot density is 24 holes/rice, the 3rd level
Section shot density is 36 holes/rice, and the 4th horizontal segment shot density is 48 holes/rice.
Step 4：Injection protective layer is added in the straight well section and horizontal segment connecting place of horizontal well, injection protective layer material is
High temperature resistant stainless steel, length is 5 meters, and thickness is 10 millimeters.
After the completion of completion practice, mixed phase heated fluid generator and flooding operation can be started under lower going-into-well into pit shaft.
Claims (6)
1. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well, it is characterised in that the technique includes：
In oilfield drilling, reaming bit is changed during 50-300 meters away from target oil reservoir of drill bit, passes through reaming bit and continues to bore
Enter to be formed oil reservoir top reaming section 50-300 meters high, and；
Straight well section drilling well finish after in the wellbore tripping in sleeve pipe and between sleeve pipe and stratum reaming section add grout off layer,
And；
After after grout off layer solidification, continue to pierce net horizontal section, and；
Net horizontal section drilling well carries out perforation completion operation after finishing, and perforating modes take staged perforation, and in the straight of horizontal well
Well section and horizontal segment connecting place add injection protective layer.
2. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well as claimed in claim 1, it is characterised in that institute
State reaming section mineshaft diameter increases 20-80 centimetres with respect to the non-reaming mineshaft diameter in its top.
3. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well as claimed in claim 1, it is characterised in that institute
Plugged zone is stated for cement and montmorillonite mixture, montmorillonite mass ratio is that 5-10% remaining composition is cement, the cement selection
E, F grades in API classifications.
4. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well as claimed in claim 3, it is characterised in that institute
Montmorillonite particle diameter is stated for 0.01-0.1 millimeters.
5. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well as claimed in claim 1, it is characterised in that institute
It by horizontal segment from tiptoe is isometric four sections to heel punishment to state staged perforation to be specially, and the ratio between four sections of shot densities are 4:
3:2:1, shot density is 10-60 holes/rice.
6. a kind of well-completing process of the spontaneous mixed phase hot fluid oil production method of horizontal well as claimed in claim 1, it is characterised in that institute
It is that the smooth high temperature resistant stainless steel body in surface is constituted to state injection protective layer, and 5-10 millimeters of thickness, 5-30 meters of length plays level of protection
Sleeve pipe is not by mixed phase hot fluid corrosiveness at well heel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108442906A (en) * | 2018-04-26 | 2018-08-24 | 中国石油天然气股份有限公司 | Steam soak Heavy Oil Reservoir perforating methods and perforation structure |
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