CN106433582A - KPF high-performance water-base drilling fluid - Google Patents
KPF high-performance water-base drilling fluid Download PDFInfo
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- CN106433582A CN106433582A CN201610802401.8A CN201610802401A CN106433582A CN 106433582 A CN106433582 A CN 106433582A CN 201610802401 A CN201610802401 A CN 201610802401A CN 106433582 A CN106433582 A CN 106433582A
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- drilling fluid
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- performance water
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/34—Lubricant additives
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses KPF high-performance water-base drilling fluid. Clear water is used as a medium; the KPF high-performance water-base drilling fluid is prepared and obtained by mixing the following raw materials according to a proportion: bentonite (NV-1), sodium carbonate (Na2CO3), potassium hydroxide (KOH), polyanionic cellulose (LV-PAC), potassium chloride (KCI), polyamine, polymeric aluminum (AOP-1), chromium-free sulfonated lignite (M-SMC) or disperse diluting agent, extra-grade sulfonated asphalt powder (ST-2), sulfonated asphalt (FT-1) or oil-soluble resin (SCL), emulsifying agent (SEA), nano calcium, rigid micron-nano blocking agent (AT), extreme-pressure lubricant (SDPH-1), extreme-pressure lubricant (SDPH-2), extreme-pressure lubricant (SWJH) and olein lubricant (CGY). The KPF high-performance water-base drilling fluid is the technique of pure water-base drilling fluid, and is environment-protection-friendly drilling fluid; the environment-protection treatment expense is decreased; homemade materials are adopted completely; the problem of well-wall instability is solved by adopting composite collapse prevention; the safety of drilling construction is guaranteed; a composite lubrication way is used; the lubricating property of a system is favorable; the under-well friction drag is small; the casing running after well completion is completely ensured; further, the reutilization of the drilling fluid is realized.
Description
Technical field
The present invention relates to drilling fluid composition field is and in particular to a kind of KPF high performance water-based drilling fluid.
Background technology
Shale gas exploitation is carried out substantially by the way of horizontal well, is abroad accounted for using the well that oil base drilling fluid is constructed and applies
The 50% about of work well total amount, in addition 50% well adopt high performance water-based drilling fluid, GOF high performance water-based drilling fluid technology exists
It is introduced within 2015 domestic, solve oil-based drill cuttings, the pollution problem to environment for the oil base drilling fluid waste liquid, but the main material using
Expect all external imports, costly, and have such problems as that material premature breakdown, system are bubbled, inhibition is not enough.
Content of the invention
For solving the above problems, the invention provides a kind of KPF high performance water-based drilling fluid, apply domestic material, shape
The brand-new high performance water-based drilling fluid system of one-tenth, ripe drilling liquid technology, reduce system cost, improve drilling engineering effect
Benefit.
For achieving the above object, the technical scheme that the present invention takes is：
KPF high performance water-based drilling fluid, with clear water as medium, the mixed raw material adding following mass volume ratio is for institute
?：
20Kg/m3Bentonite (NV-1), 1Kg/m3Soda, 2Kg/m3Potassium hydroxide (KOH), 10Kg/m3Poly- the moon
Ion fiber element (LV-PAC), 50-80Kg/m3Potassium chloride (KCl), 5-10Kg/m3Polyamine, the polymeric aluminum (AOP- of 1-2%
1)、30Kg/cm3Chrome-free sulfonated lignite (M-SMC) or 10-20Kg/m3Decentralized diluent, 60Kg/m3Superfine sulfonation drip
Calomelas (ST-2), 40Kg/cm3Sulfonated gilsonite (FT-1) or 40Kg/m3Oil-soluble resin (SCL), 5Kg/m3Emulsifying agent
(SEA)、20Kg/m3Nanometer calcium, 10Kg/m3Rigidity receive a micron sealing agent (AT), 10Kg/m3Extreme-pressure lubricant SDPH-1,
10Kg/m3Extreme-pressure lubricant SDPH-2,10Kg/m3Extreme-pressure lubricant SWJH, 10-20Kg/m3Olein CGY.
Wherein, the potassium concentration of described potassium chloride >=30,000 PPm.
Wherein, with well slurry as medium during completion, lubricant formulation is added to become lubrication confining liquid, lubrication closing formula of liquid is：
Well slurry+20Kg/m3Plastic beads+10-20Kg/m3Extreme-pressure lubricant (SDPH or SWJH)+30Kg/m3Kollag (LUB-
N).
The invention has the advantages that：
1st, the present invention is based on research and development on the basis of pure water base drilling fluid, and completely not using oil like material；
2nd, all homemade goodses of material using, have broken away from the dependence to external product；
3rd, drilling fluid system is simply it is easy to grasp, easy maintenance, stabilizing mud properties；
4th, strong inhibition capability is in external similar technique；
5th, lubricity is good, can also be oriented operation in horizontal segment up to more than 1300m, and during finishing drilling, down-hole frictional resistance is bright
Show less than other high performance water-based drilling fluids；
6th, system expense is only the half of external system, under low oil price at present, has the competitive advantage of uniqueness.
Brief description
Fig. 1 is the casing programme figure of YS108H8-5 well in the embodiment of the present invention.
Fig. 2 is the casing programme figure of YS108H8-3 well in the embodiment of the present invention.
Specific embodiment
In order that objects and advantages of the present invention become more apparent, with reference to embodiments the present invention is carried out further
Describe in detail.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit this
Bright.
Embodiments provide a kind of KPF high performance water-based drilling fluid, with clear water as medium, add following mass body
The mixed raw material of long-pending ratio is for gained：
Clear water+20Kg/m3Bentonite (NV-1)+1Kg/m3Soda (Na2CO3)+2Kg/m3Potassium hydroxide (KOH)+10Kg/m3
Polyanion cellulose (LV-PAC)+5-8Kg/m3Potassium chloride (KCl)+5-10Kg/m3Polyamine+10-20Kg/m3Polymeric aluminum (AOP-
1)+30Kg/m3Chrome-free sulfonated lignite (M-SMC) (or 10-20Kg/m3Decentralized diluent)+60Kg/m3Superfine sulfonated gilsonite powder
(ST-2)+40Kg/m3(FT-1) (or 40Kg/m3Oil-soluble resin (SCL))+5Kg/m3Emulsifying agent (SEA)+20Kg/m3Nanometer calcium
+10Kg/m3Rigidity receives a micron sealing agent (AT)+10Kg/m3Extreme-pressure lubricant (SDPH-1)+10Kg/m3Extreme-pressure lubricant (SDPH-
2)+10Kg/m3Extreme-pressure lubricant (SWJH)+10-20Kg/m3Olein (CGY)；The potassium concentration of described potassium chloride >=30,000
PPm.
Embodiment 1
Use example in YS108H8-5 well
YS108H8-5 well designs well depth 4258m, actual finishing drilling well depth 4225m, deep 4220.6m under completion casing.During two open
Completion depth 1475m, in complete casing setting depth 1473.5m.5 days 10 May in 2016：00 starts to sweep plug, and 17：00 sweeps plug to 1475m；
21：00 is drilled into well depth 1481m, is converted to high performance water-based drilling fluid, pulls out of hole and changes directional tool combination.It is drilled into well depth 2016m (stone
Cattle pen group bottom) pull out of hole, change rotary steerable tool orientation；It is drilled into 2526m and cross A target spot (tiltedly deep 2525m, vertical depth 2267.03m, well
Oblique 81.2 °, 8.73 ° of orientation) after, pull out of hole and change screw rod continuation drilling.6 days 16 June in 2016：00 finishing drilling, finishing drilling well depth 4225m,
Horizontal segment length 1700m, B target tiltedly deep 4225.00m/ vertical depth 2539.31m, 80.75 degree of hole deviation, 6.9 degree of orientation.
YS108H8-5 well wellbore construction overview table
YS108H8-5 well property of drilling fluid statistical table
This well is converted to KPF high performance water-based drilling fluid from well depth 1481m, and enters directional orientation tool under starting and carry out micro- increasing hole angle
Operation, increases to 20 ° to well depth 2016m hole deviation, enter down afterwards rotary steering packed hole assembly (three centralizers) carry out turn round orientation and
Strong increasing hole angle operation, increases to 81.63 ° of entrance A target spots to well depth 2526m hole deviation, acts drilling tool, then be replaced with conventional screw drilling tool
Row horizontal segment is constructed, and enters cutting bed destructor 5 under well depth 3159m, and auxiliary sand removal, it is ensured that well cleaning, is drilled into well depth
4225m finishing drilling.It has suffered stable performance in work progress, vibrosieve sand return is normal, and forming degree is high, stratum does not occur and collapses now
As wellbore stability；During finishing drilling, termination of pumping above carries maximum frictional resistance 40-56t, the maximum frictional resistance 30-40t of decentralization；Injection closing before setting of casing
Lubrication slurry, seals 2500-4225m well section, and termination of pumping when recurrence is bored above carries maximum frictional resistance 30-40t, the maximum frictional resistance 20-30t of decentralization, really
Protected completion casing smooth under enter, the setting of casing time be 30h, than high performance water-based drilling fluid setting of casing saving of time before
30%.Drilling fluid expense is the 70% of other high performance water-based drilling fluids.Rate of penetration is higher than other high performance water-based drilling fluid
30%.
Embodiment 2
Use example in YS108H8-3 well
YS108H8-3 well designs well depth 4294m, actual finishing drilling well depth 4225m, deep 4223.5m under completion casing.During two open
Completion depth 1481m, in complete casing setting depth 1479.7m.14 days 8 June in 2016：00 time probing plug is hampered to well depth 1416m, starts
Be converted to high performance water-based drilling fluid and sweep plug, 15 days 8 June：00 sweeps plug terminates, and continues drilling to 1491m, breaks test with doing, so
Pull out of hole afterwards and change directional tool combination.Directional drilling pulls out of hole to well depth 2026.24m (Longma small stream group), changes rotary steerable tool orientation；
It is drilled into the mistake of 2440.24m leakage to return, pull out of hole and get rid of rotary steerable tool, lower roller drill leak stopping；After leak stopping success, pull out of hole and change screw rod
Continue drilling.18 days 18 July in 2016：00 finishing drilling, finishing drilling well depth 4225m, horizontal segment length 1700m, A target spot tiltedly deep 2525m, hang down
Deep 2259.47m, 81.98 ° of hole deviation, 9.62 ° of orientation；B target tiltedly deep 4225.00m/ vertical depth 2488.66m, 81.04 ° of hole deviation, orientation
6.70°.
YS108H8-3 well wellbore construction overview table
YS108H8-3 well property of drilling fluid statistical table
YS108H8-3 well horizontal segment orientation section statistics
This well is adjusted from well depth 1481m using the old slurry of YS108H8-5 well completion, after performance reaches requirement, replaces into well
Interior, potassium chloride polymer drilling fluid is replaced out, is converted into KPF high performance water-based drilling fluid system, be drilled into well depth 1491m and break with doing
Test.Act drilling tool and be replaced by directional tool structure, start orientation construction, be drilled into well depth 2026m, micro- increasing hole angle, to 20 °, rises and to bore
Tool, is replaced by rotary steering packed hole assembly (three centralizers).Under get into bottom after carry out turn round orientation, strong increasing hole angle operation, be drilled into well
During deep 2440m occur the mistake property returned leakage, rise rotary steerable tool, during trip-out remove front two cylindrical drills tool because well do not obtain clear very well
Clean, pull out of hole difficult outer, remaining well section pulls out of hole normal.Using bridge joint leak stopping will be good for Slot Handling after, then under enter screw rod directional tool
Proceed positioning operation, enter A target spot to well depth 2525m.Be drilled under well depth 3032m and enter 8 cutting bed destructors, continue into
Row horizontal segment is constructed, and because well track is bad, is afraid of that well cleaning is had any problem, is drilled into well depth 3780m and increases to cutting bed destructor
15, it is drilled into after well depth 4068m plays finishing drilling it is considered to downhole safety problem, again cutting bed destructor is kept to 8, until boring
To well depth 4225m finishing drilling.Stable performance in work progress, well cleaning is good, and the phenomenon that collapses in wellbore stability；Through one
Secondary plugging operations are good by Slot Handling, and Slot Handling is easy；Because Party A's High-quality Reservoir Drilling ratio requirement, hole deviation adjustment frequency will be met
Numerous, well track is poor, and drilling fluid lubricating is very good, still can be oriented operation after entering horizontal segment 1364m；During finishing drilling
Maximum frictional resistance 50t is carried on termination of pumping, the maximum frictional resistance 30t of decentralization；Before setting of casing, injection closed lubrication slurry, seals 2500-4225m well section,
When recurrence is bored, termination of pumping above carries maximum frictional resistance 30-40t, and the maximum frictional resistance 20t of decentralization is it is ensured that enter under completion casing is smooth, setting of casing
Time is 20h, than high performance water-based drilling fluid setting of casing saving of time 50% before.Drilling fluid cost is other high-performance water
The 50% of base drilling fluid.Because this well positioning operation time is more, have impact on bit speed, rate of penetration is slightly below other wells.
In sum, this patent is embodied as pure water base drilling fluid technology, solves oil-based drill cuttings, oil base drilling fluid gives up
Liquid processes difficult problem, it is to avoid the risk being likely to occur in environmental protection；Reduce environmental protection treatment expense；All using domestic material
Material, solves the use restriction that dependence on import causes；Using composite lubricated mode, system lubricity is good, and down-hole frictional resistance is little, complete
Enter completely secure under casing！Drilling fluid achieves the problem of recycling, reduces discharging of waste liquid amount；Drilling fluid is prepared and is taken
With being only the half of external similar technique, add and achieve recycling, mouth well saves drilling fluid comprehensive cost more than 1,500,000
Unit, achieves significant economic benefit.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1.KPF high performance water-based drilling fluid is it is characterised in that with clear water as medium, add the raw material of following mass volume ratio to mix
Gained is prepared in conjunction：
20Kg/m3Bentonite (NV-1), 1Kg/m3Soda, 2Kg/m3Potassium hydroxide (KOH), 10Kg/m3Polyanion fine
Dimension plain (LV-PAC), 50-80Kg/m3Potassium chloride (KCI), 5-10Kg/m3Polyamine, 10-20Kg/m3Polymeric aluminum (AOP-
1)、30Kg/m3Sulfonated lignite (M-SMC) or 10-20Kg/m3Decentralized diluent, 60Kg/m3Superfine sulfonated gilsonite powder
(ST-2)、40Kg/m3Sulfonated gilsonite (FT-1) or 40Kg/m3Oil-soluble resin (SCL), 5Kg/m3Emulsifying agent (SEA),
20Kg/m3Nanometer calcium, 10Kg/m3Rigidity receive a micron sealing agent (AT), 10Kg/m3Extreme-pressure lubricant (SDPH-1),
10Kg/m3Extreme-pressure lubricant (SDPH-2), 10Kg/m3Extreme-pressure lubricant (SWJH), 10-20Kg/m3Olein (CGY).
2. KPF high performance water-based drilling fluid as claimed in claim 1 is it is characterised in that the potassium concentration of described potassium chloride
>=3 ten thousand PPm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802401.8A CN106433582A (en) | 2016-08-28 | 2016-08-28 | KPF high-performance water-base drilling fluid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610802401.8A CN106433582A (en) | 2016-08-28 | 2016-08-28 | KPF high-performance water-base drilling fluid |
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| CN201610802401.8A Pending CN106433582A (en) | 2016-08-28 | 2016-08-28 | KPF high-performance water-base drilling fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480881A (en) * | 2020-11-16 | 2021-03-12 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433109A (en) * | 2011-10-21 | 2012-05-02 | 中国石油大学(华东) | Water-based drilling fluid with high suppression and lubrication performance and preparation method thereof |
| CN103937470A (en) * | 2014-04-14 | 2014-07-23 | 中国石油化工集团公司 | Water-based drilling fluid applicable to horizontal shale and preparation method thereof |
| CN104388065A (en) * | 2014-09-25 | 2015-03-04 | 中国石油天然气集团公司 | Oil-base imitating drilling fluid with characteristics of strong inhibition, strong blocking and high lubricity |
| CN104694092A (en) * | 2015-03-30 | 2015-06-10 | 中国石油大学(华东) | Water-based drilling fluid of shale gas horizontal well reinforced well wall and application thereof |
| CN104927805A (en) * | 2015-06-25 | 2015-09-23 | 山东得顺源石油科技有限公司 | High-density water-based drilling fluid applicable to continental deposit sensitive shale formation |
| CN105331338A (en) * | 2015-10-14 | 2016-02-17 | 中石化石油工程技术服务有限公司 | Anti-leakage high-performance water-based drilling fluid and preparation method thereof |
| CN105838344A (en) * | 2016-04-20 | 2016-08-10 | 西南石油大学 | High-temperature-resistance salt water drilling fluid for drilling shale |
-
2016
- 2016-08-28 CN CN201610802401.8A patent/CN106433582A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102433109A (en) * | 2011-10-21 | 2012-05-02 | 中国石油大学(华东) | Water-based drilling fluid with high suppression and lubrication performance and preparation method thereof |
| CN103937470A (en) * | 2014-04-14 | 2014-07-23 | 中国石油化工集团公司 | Water-based drilling fluid applicable to horizontal shale and preparation method thereof |
| CN104388065A (en) * | 2014-09-25 | 2015-03-04 | 中国石油天然气集团公司 | Oil-base imitating drilling fluid with characteristics of strong inhibition, strong blocking and high lubricity |
| CN104694092A (en) * | 2015-03-30 | 2015-06-10 | 中国石油大学(华东) | Water-based drilling fluid of shale gas horizontal well reinforced well wall and application thereof |
| CN104927805A (en) * | 2015-06-25 | 2015-09-23 | 山东得顺源石油科技有限公司 | High-density water-based drilling fluid applicable to continental deposit sensitive shale formation |
| CN105331338A (en) * | 2015-10-14 | 2016-02-17 | 中石化石油工程技术服务有限公司 | Anti-leakage high-performance water-based drilling fluid and preparation method thereof |
| CN105838344A (en) * | 2016-04-20 | 2016-08-10 | 西南石油大学 | High-temperature-resistance salt water drilling fluid for drilling shale |
Non-Patent Citations (2)
| Title |
|---|
| 刘焕玉: "高性能水基钻井液在洪69井的应用", 《钻井液与完井液》 * |
| 龙大清: "应用于中国页岩气井的高性能水基钻井液", 《钻井液与完井液》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112480881A (en) * | 2020-11-16 | 2021-03-12 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
| CN112480881B (en) * | 2020-11-16 | 2023-03-07 | 天津中油渤星工程科技有限公司 | Sea area natural gas hydrate horizontal well drilling fluid and preparation method and application thereof |
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