CN109424320A - A kind of collecting well group portion well method - Google Patents
A kind of collecting well group portion well method Download PDFInfo
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- CN109424320A CN109424320A CN201710771680.0A CN201710771680A CN109424320A CN 109424320 A CN109424320 A CN 109424320A CN 201710771680 A CN201710771680 A CN 201710771680A CN 109424320 A CN109424320 A CN 109424320A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005553 drilling Methods 0.000 claims abstract description 118
- 239000012530 fluid Substances 0.000 claims abstract description 89
- 239000002344 surface layer Substances 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims abstract description 29
- 240000005020 Acaciella glauca Species 0.000 claims description 12
- 235000003499 redwood Nutrition 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000002689 soil Substances 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 5
- 230000008961 swelling Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 10
- NYNKCGWJPNZJMI-UHFFFAOYSA-N Clebopride malate Chemical compound [O-]C(=O)C(O)CC(O)=O.COC1=CC(N)=C(Cl)C=C1C(=O)NC1CC[NH+](CC=2C=CC=CC=2)CC1 NYNKCGWJPNZJMI-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 150000003863 ammonium salts Chemical class 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000440 bentonite Substances 0.000 description 3
- 229910000278 bentonite Inorganic materials 0.000 description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 229920002239 polyacrylonitrile Polymers 0.000 description 3
- 235000017550 sodium carbonate Nutrition 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000007790 solid phase Substances 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- -1 Methylcellulose sodium salt Chemical class 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (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)
- Mechanical Engineering (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of collecting well group portion well methods, belong to collecting well group development technique field.The described method includes: obtaining the track of each well, the drilling of the first well of default depth of stratum is carried out using surface layer drilling fluid, casing is lowered into the first well well, is cemented the well；It reuses the surface layer drilling fluid and is spaced the drilling that preset distance carries out the multiple wells of the same default depth of stratum on the basis of first well；The first well is carried out using deep layer drilling fluid to continue drilling finishing drilling after the first well reaches preset depth and angle, casing is lowered into the first well well, is cemented the well；The deep layer drilling fluid is reused the remaining multiple wells to be carried out continuing drilling until the multiple wells reach preset depth and angle.By the present invention in that drilling fluid is reused in same phase, drilling fluid has been saved.
Description
Technical field
The present invention relates to collecting well group development technique field, in particular to a kind of collecting well group portion well method.
Background technique
In oily, gas recovery process, exploited sometimes using portion's well mode of collecting well group, collecting well group refers to
On a well site or platform, multiple wells are drilled out, the well head spacing distance of each well is closer, and every well bottom then extends to different sides
Position, i.e., by the well group of multiple orientation well constructions.Portion's well mode of collecting well group can save occupied area, and well head is concentrated on one
Within the scope of reasonable.
After portion's well method of collecting well group is the track for determining planned well at present, successively disposes, creeps into every mouth well, i.e.,
That completes a well makes and then makes another a well.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
It is different to make the drilling fluid used during well on different stratum, using the side for successively disposing, creeping into every mouth well
Formula, which makes well, will cause the waste of drilling fluid.
Summary of the invention
In order to solve the problems, such as that prior art drilling fluid wastes, the embodiment of the invention provides a kind of well sides, collecting well group portion
Method.The technical solution is as follows:
The embodiment of the invention provides a kind of collecting well group portion well methods, which comprises
Step 1: obtaining the track of each well, the brill of the first well of default depth of stratum is carried out using surface layer drilling fluid
Into, casing is lowered into the first well well, cement the well；
Step 2: reusing the surface layer drilling fluid and be spaced preset distance progress on the basis of the first well
The drilling of the multiple wells of the same default depth of stratum；
Step 3: the first well being carried out continuing drilling until the first well reaches pre- using deep layer drilling fluid
If depth and angle, casing is lowered into the first well well, cement the well；
Step 4: reusing the deep layer drilling fluid and the remaining multiple wells are carried out continuing drilling until described more mouthfuls
Well reaches finishing drilling after preset depth and angle.
Preferably, it is 240-560m that depth of stratum is preset described in the step 1.
Preferably, surface layer drilling fluid described in the step 1 and the step 2 is swelling great soil group drilling fluid, the surface layer
The Redwood viscosity of drilling fluid is 30-35s, and the density of the surface layer drilling fluid is 1.05-1.08g/cm3。
Preferably, the preset distance in interval described in the step 2 is interval 5.5-6.5m.
It preferably, further include boring the surface layer before the reuse of the step 2 surface layer drilling fluid
Well liquid is filtered, and separating sandy rear addition clear water or thickener makes the Redwood viscosity 30-35s of the surface layer drilling fluid.
Preferably, deep layer drilling fluid described in the step 3 and the step 4 is polymeric system class drilling fluid, described
The Redwood viscosity of deep layer drilling fluid is 45s-55s, the density 1.08-1.16g/cm of the deep layer drilling fluid3。
Preferably, further include before the reuse of the step 4 deep layer drilling fluid, by the deep layer drilling fluid
It is filtered, separating sandy rear addition clear water or thickener makes the Redwood viscosity 45-55s of the surface layer drilling fluid.
Technical solution provided in an embodiment of the present invention has the benefit that
The embodiment of the present invention carries out the well of making of collecting well group by the way of segmentation in batches, and wherein the first stage creeps into
To default depth of stratum, the well of making of second stage needs to creep into the deeper position in stratum, and different wells can be crept into not
Same depth, direction and angle, drilling fluid are reused in same phase, have saved drilling fluid.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, embodiment of the present invention will be made into one below
Step ground detailed description.
The embodiment of the invention provides a kind of collecting well group portion well methods, which comprises
Step 1: obtaining the track of each well, the brill of the first well of default depth of stratum is carried out using surface layer drilling fluid
Into, casing is lowered into the first well well, cement the well；
Step 2: reusing the surface layer drilling fluid and be spaced preset distance progress on the basis of the first well
The drilling of the multiple wells of the same default depth of stratum；
Step 3: the first well being carried out continuing drilling until the first well reaches pre- using deep layer drilling fluid
If depth and angle, casing is lowered into the first well well, cement the well；
Step 4: reusing the deep layer drilling fluid and the remaining multiple wells are carried out continuing drilling until described more mouthfuls
Well reaches finishing drilling after preset depth and angle.
The embodiment of the present invention carries out the well of making of collecting well group by the way of segmentation in batches, and wherein the first stage creeps into
To default depth of stratum, it is generally the case that the default depth of stratum is the Plain group stratum of soft surface, first with surface layer drilling well
Liquid rotates into first well to default depth of stratum, and casing is lowered into the first well well, after well cementation, repeats benefit
Carries out the drilling of second mouthful of well with the surface layer drilling fluid for boring first well, when the Plain group of the soft surface of second mouthful of well of completion
After the drilling of layer, casing is lowered into second mouthful of well well, is cemented the well.Then use same method by remaining multiple wells
For drilling to default depth of stratum, the drilling for completing the first stage makes well.The shaft building of second stage needs to creep into deeper to stratum
Position, different wells can be crept into different depth, direction and angle, and according to the planned course of each well, it is mutual to make well in drilling
In the case where mutually will not influence, continue to carry out shaft building deeper into ground since first well.
As can be seen that the embodiment of the present invention, in the drilling process of well head, drilling fluid is reused in same phase, section
About drilling fluid.The embodiment of the present invention divides stratum, and the default depth of stratum in the first stage is divided into surface
The STRATIGRAPHIC DIVISION of second stage is deeper formation by stratum, it is generally the case that the surface layer ground close to ground is broken ground,
It is made of sand, little particle sillar etc., and the parameters such as formation physical property of deep layer and surface stratum is different, deeper formation is usual
For rock ore bed, it is therefore desirable to the drilling fluid used two stratum distinguishes, but in the collecting well group on same stratum not
When being crept into well, same type of drilling fluid can be used.
It will be appreciated by persons skilled in the art that the track of each well can be set by any one in the prior art
It counts simulation softward to realize, such as Landmark5000, the design of directional well usually passes through three sections of sections processed, five sections in collecting well group
Section processed, it is three-dimensional carried out around barrier section, wherein three sections of sections processed, five sections of sections processed include one section of straight well since well head
Section, and then straight well section is well section of the changes such as angle, direction, such as increasing hole angle section, steady tilted section, drop angle section etc..Three-dimensional is cutd open around barrier
The design in face is then to maintain necessary distance in order to avoid influence mutual between well.The track of each well is equal in collecting well group
It is not identical, such as part well, using three sections of systems, part well then uses five sections of systems, and the straight well Duan Weicong well head of part well starts always
The boundary of surface layer ground and deeper formation is extended to, i.e., until the default depth of stratum, part well is then since well head
Increasing hole angle section is initially entered when extending less than the position of the default depth of stratum.
Specifically, the surface stratum in the first stage described above, i.e., depth of stratum is preset described in the described step 1 is
240-560m。
Surface layer drilling fluid described in the step 1 and the step 2 is swelling great soil group drilling fluid, the surface layer drilling fluid
Redwood viscosity is 30-35s, and the density of the surface layer drilling fluid is 1.05-1.08g/cm3.The surface stratum is broken ground,
It is made of sand, little particle sillar, therefore need to only meet can be by clast and soil band for viscosity to drilling fluid and density requirements
Out.
The preset distance in interval described in the step 2 is interval 5.5-6.5m.Preferably 6m, the distance between well head compared with
It is small, it can be reduced occupied area, save soil occupied area, saved cost.
In embodiment described above, also wrapped before the reuse surface layer drilling fluid of the step 2
It includes, the surface layer drilling fluid is filtered, separating sandy rear addition clear water or thickener makes the thunder of the surface layer drilling fluid
Family name's viscosity is 30-35s.Since used surface layer drilling fluid carries clast, soil etc. admittedly during circulation well cleanup
Phase particle after needing to filter solid phase, measures the requirement whether its viscosity, density etc. meet drilling fluid and answers if viscosity is excessive
The reuse of next step is carried out after adding clear water to dilute again.If viscosity is small, thickener should be added and keep it in 30-35s's
Viscosity meets the ability that clast, soil etc. are carried when reusing.
Deep layer drilling fluid described in the step 3 and the step 4 is polymeric system class drilling fluid, the deep layer drilling well
The Redwood viscosity of liquid is 45s-55s, the density 1.08-1.16g/cm of the deep layer drilling fluid3.Since deeper formation is usually rock
Ore bed, it is therefore desirable to which the viscosity and density of deep layer drilling fluid are larger, enough carry the clast in drilling process to ground.
In embodiment described above, further include before the reuse deep layer drilling fluid of the step 4, it will
The deep layer drilling fluid is filtered, and separating sandy rear addition clear water or thickener makes the Redwood viscosity of the surface layer drilling fluid
For 45-55s.Since used deep layer drilling fluid carries the solid phase particles such as clast, soil during circulation well cleanup,
After needing to filter solid phase, the requirement whether its viscosity, density etc. meet drilling fluid is measured, if viscosity is excessive, clear water should be added
The reuse of next step is carried out after dilution again.If viscosity is small, the viscosity that thickener keeps it in 45-55s should be added, it is full
The ability of clast, soil etc. is carried when foot is reused.
Technical solution of the present invention is further detailed with a specific embodiment below:
First stage: the exploitation of first well is crept into using the drill bit of Ф 311.1mm to 246m, guarantees that well track hangs down
Directly, the first well is lowered into using the surface pipe of Ф 244.5mm, is cemented the well using cement.It is adopted in first stage
Drilling fluid is the bentonite drilling fluid that Redwood viscosity is 35s: using mass fraction for 4-6% bentonite, 0.2-0.4% carboxylic
Methylcellulose sodium salt (model MV-CMC), soda ash, wherein the additive amount of soda ash is determined according to the bentonitic amount of institute, one
As 1t bentonite in powder add the soda ash of 0.1t.Then the drilling fluid, sand setting filtering are reused, and adds sanlose
After (model MV-CMC) and clear water adjust the viscosity to 35s of drilling fluid, second mouthful of well is bored using the drill bit of Ф 311.1mm
100m is proceeded to, guarantees that well track is vertical, carries out surface layer deflecting, drill assembly MWD (Molecular Weight
Distribution) measurement while drilling deflecting is to 549m, and hole deviation is gradually increased to 45 ° and hold angle is to 551m, using Ф 244.5mm table
Layer casing lowers into second mouthful of well, is cemented the well using cement.Then the drilling fluid is reused, sand setting filters, and
After the viscosity to 35s for adding sanlose (model MV-CMC) and clear water adjusting drilling fluid, to third mouth well
It is crept into using Ф 311.1mm drill bit to 100m, drill assembly MWD and carries out deflecting, deflecting to 175m, hole angle is controlled at 6 °, surely
Drop angle construction, drop angle to 375m tiltedly are carried out to 225m, hole angle is gradually decreased to 0 °, and drilling to 401m guarantees that well track is vertical,
Completion practice lowers into the third mouth well using Ф 244.5mm, is cemented the well using cement.
Second stage: it spuds in the second stage of first well and is crept into using Ф 215.9mm drill bit to 350m, drill assembly
MWD carries out deflecting, deflecting to 600m, and hole angle is gradually increased to 20 °, and hold angle uses Ф 139.7mm to well depth, complete well is designed
Production casing lowers into the first well, is cemented the well using cement.The drilling fluid used in second stage is viscous for Lei Shi
Degree be 50s polymer drilling fluid: well starch, mass fraction be 0.2-0.4% sanlose (model MV-CMC),
0.5~0.8% drilling fluid hydrolyzed polyacrylonitrile ammonium salt, 1~1.5% drilling fluid anti-sloughing agent (model HFT-201), 0.3
~0.5% drilling fluid polyacrylamide sylvite, 1~1.5% sulfonated gilsonite, piece alkali, wherein the additive amount of piece alkali is according to needed for
PH value is determined.Then the drilling fluid is reused, sand setting filtering, and add drilling fluid hydrolyzed polyacrylonitrile ammonium salt and clear
After water adjusts drilling fluid viscosity to 50s, spud in second mouthful of well using Ф 215.9mm drill bit hold angle to 1225m, hole angle control
For system at 45 °, 1225m to 1660 meters of drill assembly MWD carries out drop angle, and hole angle is gradually decreased to 32.5 °, hold angle to designing well depth,
Complete well lowers into the first well using Ф 139.7mm production string, is cemented the well using cement.Then recycling should
Drilling fluid, sand setting filtering, and add after drilling fluid hydrolyzed polyacrylonitrile ammonium salt and clear water adjust drilling fluid viscosity to 50s,
It spuds in third mouth well and is crept into using Ф 215.9mm drill bit to 905m, drill assembly MWD progress deflecting, deflecting to 1293.07m,
Hold angle to 1350m hole angle is gradually increased to 31.05 °, and hold angle uses Ф 139.7mm production casing to well depth, complete well is designed
The first well is lowered into, is cemented the well using cement.
Wherein, chemical reagent, product employed in embodiments thereof described above etc. does not indicate that model, producer are city
Sell conventional products.
All the above alternatives can form the alternative embodiment of the disclosure, herein no longer using any combination
It repeats one by one.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of collecting well group portion well method, which is characterized in that the described method includes:
Step 1: the track of each well is obtained, the drilling of the first well of default depth of stratum is carried out using surface layer drilling fluid, it will
Casing lowers into the first well well, well cementation；
Step 2: reusing the surface layer drilling fluid and be spaced preset distance progress on the basis of the first well equally
The default depth of stratum multiple wells drilling；
Step 3: the first well being carried out continuing drilling until the first well reaches preset using deep layer drilling fluid
Depth and angle lower into casing in the first well well, well cementation；
Step 4: reusing the deep layer drilling fluid and the remaining multiple wells are carried out continuing drilling until the multiple wells reach
Finishing drilling after to preset depth and angle.
2. the method according to claim 1, wherein presetting depth of stratum described in the step 1 is 240-
560m。
3. the method according to claim 1, wherein surface layer drilling fluid described in the step 1 and the step 2
For swelling great soil group drilling fluid, the Redwood viscosity of the surface layer drilling fluid is 30-35s, and the density of the surface layer drilling fluid is 1.05-
1.08g/cm3。
4. the method according to claim 1, wherein the preset distance in interval described in the step 2 is interval
5.5-6.5m。
5. the method according to claim 1, wherein the reuse surface layer in the step 2 is bored
It further include being filtered the surface layer drilling fluid before well liquid, separating sandy rear addition clear water or thickener makes the table
The Redwood viscosity of layer drilling fluid is 30-35s.
6. the method according to claim 1, wherein deep layer drilling fluid described in the step 3 and the step 4
For polymeric system class drilling fluid, the Redwood viscosity of the deep layer drilling fluid is 45s-55s, the density of the deep layer drilling fluid
1.08-1.16g/cm3。
7. the method according to claim 1, wherein in the reuse deep layer drilling fluid of the step 4
It before further include being filtered the deep layer drilling fluid, separating sandy rear addition clear water or thickener bores the surface layer
The Redwood viscosity of well liquid is 45-55s.
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| CN201710771680.0A CN109424320A (en) | 2017-08-31 | 2017-08-31 | A kind of collecting well group portion well method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111178717A (en) * | 2019-12-19 | 2020-05-19 | 中国石油天然气股份有限公司 | Linear cluster platform well deployment method and device |
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