CN108384526A - A kind of not contaminated product Drilling Fluids for Horizontal Wells and its preparation method and application - Google Patents
A kind of not contaminated product Drilling Fluids for Horizontal Wells and its preparation method and application Download PDFInfo
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- CN108384526A CN108384526A CN201810367135.XA CN201810367135A CN108384526A CN 108384526 A CN108384526 A CN 108384526A CN 201810367135 A CN201810367135 A CN 201810367135A CN 108384526 A CN108384526 A CN 108384526A
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- horizontal wells
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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
Abstract
The present invention provides one kind, contaminated product Drilling Fluids for Horizontal Wells and preparation method thereof, drilling fluid do not include the component of following mass parts：0~200 part of 1000 parts of water, 30~60 parts of bentonite, 5~15 parts of Organosilicon Alcohol in Organic, 20~30 parts of emulsified wax, 1~5 part of cationic polymer, 5~15 parts of fluid loss additive, 30~50 parts of temperature resisting agent and heavy weight additive do not contain oily substance.The present invention also provides the applications of not contaminated product Drilling Fluids for Horizontal Wells, the present invention is without adding oily substance, coordinate jointly through cationic polymer, emulsified wax and Organosilicon Alcohol in Organic inhibitor, effectively improve the lubricity of drilling fluid, the negative electrical charge in clay can be effectively neutralized in use, clay water sensitivity is reduced, borehole wall stability is improved, meets horizontal well drilling in the process to the needs of drilling fluid.
Description
Technical field
The present invention relates to petroleum drilling fluid technical fields, more particularly to a kind of not contaminated product Drilling Fluids for Horizontal Wells and its preparation side
Method and application.
Background technology
In recent years, researcher be dedicated to study oil exploration quickly and efficiently carry out.Horizontal well drilling technology is real
Existing oil exploration is quickly and the important means of effective exploitation, horizontal well lead to horizontal brill relative to the difference on vertical well construction
During well, mill resistance bigger when drilling tool is contacted with the borehole wall needs used drilling fluid to have better lubricity and well
Wall stability.Prediction of formation pressure detection is inaccurate in drilling well exploitation, and the designs such as casing programme, drilling fluid density is caused to close not to the utmost
Reason, considerably increases the technical difficulty of wellbore construction, and currently used drilling fluid system is caused satisfaction level not bore well
Needs of the well engineering to drilling fluid lubricating and borehole wall stability.
In order to meet during horizontal drilling the needs of to lubricity and borehole wall stability, mixed often through in drilling fluid
Enter substantial oil to meet the needs of drilling engineering, but the use of crude oil easily causes problem of environmental pollution；Also, crude oil is
A kind of mixture that chemical physical property is relatively stable, the prior art be difficult to realize it is extensive to crude oil, decompose at low cost, give
Environmental protection work brings extreme difficulties.
Invention content
In view of this, the present invention provides a kind of not contaminated product Drilling Fluids for Horizontal Wells and its preparation method and application, the present invention
The not contaminated product Drilling Fluids for Horizontal Wells provided is without adding crude oil, you can meets horizontal drilling process to drilling fluid lubricating and the borehole wall
The needs of stability.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical scheme：
The present invention provides a kind of not contaminated product Drilling Fluids for Horizontal Wells, do not contain oily substance, include the group of following mass parts
Point：
Preferably, the Organosilicon Alcohol in Organic includes modified methyl silicone oil.
Preferably, the cationic polymer includes cation polypropylene saline copolymer.
Preferably, the fluid loss additive includes one kind in polyacrylonitrile amine salt, sulfonated-pheno-formoldehyde resin and sulfonated lignite
Or it is a variety of.
Preferably, the temperature resisting agent includes sulfomethylation phenolic resin and/or sulfonated lignite.
Preferably, when the temperature resisting agent includes sulfomethylation phenolic resin and sulfonated lignite, the sulfomethylation phenolic aldehyde
The mass ratio of resin and sulfonated lignite is (15~25)：(15~25).
Preferably, the heavy weight additive includes barite.
The present invention provides the not preparation methods of contaminated product Drilling Fluids for Horizontal Wells described in above-mentioned technical proposal, including：It will be described
Water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive, temperature resisting agent and heavy weight additive mixing, are not mixed
Grease horizontal well drilling fluid.
Preferably, the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive, temperature resisting agent and
Heavy weight additive is mixed into the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive and temperature resisting agent
After mixing, then mix with heavy weight additive.
The present invention also provides do not made described in contaminated product Drilling Fluids for Horizontal Wells or above-mentioned technical proposal described in above-mentioned technical proposal
Application of the not contaminated product Drilling Fluids for Horizontal Wells that Preparation Method is prepared in horizontal drilling.
The present invention provides a kind of not contaminated product Drilling Fluids for Horizontal Wells, include the component of following mass parts：1000 parts of water, swelling
30~60 parts of soil, 5~15 parts of Organosilicon Alcohol in Organic, 20~30 parts of emulsified wax, 1~5 part of cationic polymer, fluid loss additive 5~15
0~200 part of part, 30~50 parts of temperature resisting agent and heavy weight additive do not contain oily substance.The present invention is without adding oily substance, through sun
Ionomer, emulsified wax and Organosilicon Alcohol in Organic coordinate jointly, effectively improve the lubricity of drilling fluid, and in cationic polymerization
Under object, emulsified wax and the common mating reaction of Organosilicon Alcohol in Organic so that contaminated product Drilling Fluids for Horizontal Wells can not neutralize in clay effectively
Negative electrical charge, reduce clay water sensitivity, improve borehole wall stability, meet the needs to drilling fluid during horizontal well drilling.It is real
Apply example the result shows that, the lubricating coefficient of Drilling Fluids for Horizontal Wells provided by the invention is only 0.036, and there is good inhibitions to wrap
Effective stabilizing borehole is reached by performance.
Specific implementation mode
The present invention provides a kind of not contaminated product Drilling Fluids for Horizontal Wells, do not contain oily substance, include the group of following mass parts
Point：
In the present invention, unless otherwise specified, the component raw material of the not contaminated product Drilling Fluids for Horizontal Wells is art technology
Corresponding commercial goods known to personnel.
Not contaminated product Drilling Fluids for Horizontal Wells provided by the invention, in terms of mass parts, including 1000 parts of water.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 30~60 parts of swellings
Soil, preferably 35~55 parts, further preferably 40~50 parts.In the present invention, the bentonite is preferably sodium bentonite；
The bentonite can improve drilling fluid plastic viscosity, gel strength, yield value, and enhancing drilling fluid suspends and take lithology.The present invention
There is no particular/special requirement to the bentonitic source, uses well-known to those skilled in the art national standard can be met：GB/
T5005-2010.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 5~15 parts organic
Silanol, preferably 6~12 parts, further preferably 8~10 parts.In the present invention, the Organosilicon Alcohol in Organic preferably includes modified first
Base silicone oil (DS-302)；Free alkali≤5.0wt.% of the modified methyl silicone oil, silicone content >=3.0wt.%, salt content≤
2.0wt.%.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 20~30 parts of emulsifications
Paraffin, preferably 22~28 parts, further preferably 25 parts.In the present invention, the emulsified wax preferably includes RHJ-1；Institute
Stating emulsified wax has good lubricity, and unstressed configuration.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 1~5 part of cation
Polymer, preferably 1.5~4 parts, further preferably 2~3 parts.In the present invention, the cationic polymer preferably includes
Cation acrylic saline copolymer (DS-301), i.e. the acrylates analog copolymer containing cationic monomer.In the present invention,
The average molecular weight of the cationic polymer is preferably not less than 7.0 × 106；The pH value of the cationic polymer is preferably 5
~8.
In the present invention, the cationic polymer plays the effect of lubrication in drilling fluid, is improved in conjunction with emulsified wax
Drilling fluid lubricating caving-preventing characteristic can effectively improve the continuous phase behaviour of drilling fluid, and the lubricity of water can be changed after addition, and enhancing inhibits
Property, so that mud shale is not susceptible to peptizaiton, to further increase the anti sloughing effectiveness of system in well section of easily collapsing, and then improves well
Wall stability.It, can be with faster speed and stronger electrostatic furthermore the cationic polymer is positively charged, and neutralising capacity is strong
Negative electrical charge in active force and in clay reduces the negative electrical charge on clay surface, and then reduces the water sensitivity of clay, plays to stablize sticking
The effect of soil, to improve the borehole wall stability of drilling fluid.The present invention use high-molecular cationic polymer, strand compared with
It is long, good bridging action can be played, is further increased in negative electrical charge in clay and speed and electrostatic force.
In the present invention, the Organosilicon Alcohol in Organic plays the role of inhibitor, and mud shale is made to be not susceptible to peptizaiton, to
The anti sloughing effectiveness of system is further increased in well section of easily collapsing, borehole wall anti sloughing effectiveness is good, that is, borehole wall stability is good.In drilling fluid
Easy pulping well section plays the role of anti-collapse during use, improves the borehole wall stability of drilling fluid.In the present invention, the emulsification stone
Wax can effectively change Drilling Fluids for Horizontal Wells continuous phase, and the lubricity of water can be changed after addition, enhance inhibition, further increase
Borehole wall stability improves the lubricity of drilling fluid；The emulsified wax is poly- with cation while changing drilling fluid continuous phase
Closing object collective effect makes filtrate be passivated, that is, improves the inhibition of drilling fluid, is not interfered, can effectively be prevented by stratum other factors
The only pollution of crude oil, salt and calcium ions and magnesium ions makes drilling fluid have good antifouling property；And help to reduce surface
Power has good reservoir protection characteristic；Can also preventing drilling fluid from occurring, oil is invaded, salt contamination and calcium ions and magnesium ions corrode, and is improved and is bored
The antifouling property of well liquid reduces the generation of easily collapse well section and saline bed well section complex situations.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes that 5~15 parts of drops are filtered
Lose agent, preferably 6~12 parts, further preferably 8~10 parts.In the present invention, the fluid loss additive preferably includes polypropylene
Nitrile amine salt (NH4- HPAN), it is one or more in sulfonated-pheno-formoldehyde resin (SMP) and sulfonated lignite (SMC).When the drop is filtered
When losing the mixture that agent is sulfonated-pheno-formoldehyde resin and sulfonated lignite, the quality of the sulfomethylation phenolic resin and sulfonated lignite
Than preferably (15~25)：(15~25), further preferably (15~20)：(20~24), more preferably 18:24.The present invention
There is no particular/special requirement to the source of the polyacrylonitrile amine salt, uses well-known to those skilled in the art to meet standard Q/SH
0039—2007《Drilling fluid hydrolyzed polyacrylonitrile ammonium salt technology》.In the present invention, the fluid loss additive effectively subtracts
Few drilling fluid penetrates into stratum.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 30~50 parts of temperature resistances
Agent, preferably 35~45 parts, further preferably 40 parts.In the present invention, the temperature resisting agent includes sulfomethylation phenolic resin
And/or sulfonated lignite.In the present invention, when the temperature resisting agent preferably includes sulfomethylation phenolic resin and sulfonated lignite, institute
The mass ratio for stating sulfomethylation phenolic resin and sulfonated lignite is preferably (15~25)：(15~25), further preferably (15~
20)：(20~24), more preferably 18:24.
On the basis of the water of the mass parts, not contaminated product Drilling Fluids for Horizontal Wells provided by the invention includes 0~200 part of exacerbation
Agent, preferably 1~200 part, further preferably 5~150 parts, more preferably 50~100 parts.In the present invention, the exacerbation
Agent is preferably barite.In the present invention, the 200 mesh sieve screen over-size of the barite is preferably smaller than 3wt.%, i.e., at least
The grain size of the barite particle of 97wt.% is at 74 microns or less.In the present invention, the heavy weight additive can effectively adjust drilling fluid
Density.
In the present invention, the not contaminated product Drilling Fluids for Horizontal Wells does not contain oily substance；The oily substance refers specifically to original
Oil, i.e., directly from oil well produced natural oil.Drilling fluid system provided by the invention by cationic polymer, emulsified wax and
Organosilicon Alcohol in Organic inhibitor forms, and cationic polymer makes the water sensitivity of clay lose substantially and play the role of stable clay, and
And emulsified wax is effectively prevented that oil is invaded, salt contamination and calcium ions and magnesium ions are invaded, and so that drilling fluid is had good antifouling property, and then make
Obtaining drilling fluid has good lubricity, blocks anti-collapse property, may be implemented in horizontal well using the use effect for not needing contaminated product
Fruit is a kind of drilling fluid system of environment-friendly type.
The present invention matches without adding oily substance through cationic polymer, emulsified wax and Organosilicon Alcohol in Organic inhibitor jointly
It closes, effectively improves the lubricity of drilling fluid, and can effectively neutralize the negative electrical charge in clay, reduce clay water sensitivity, improve
Borehole wall stability meets horizontal well drilling in the process to the needs of drilling fluid.
Not contaminated product Drilling Fluids for Horizontal Wells provided by the invention does not include oily substance, and when use also need not additionally be mixed into oil
Substance is easy degradation using component raw material, will not cause the pollution to environment, and drilling well subsequent processing is simple；The present invention
The not contaminated product Drilling Fluids for Horizontal Wells provided, performance is stable, it can be achieved that recycling, reduces the production cost of drilling fluid.
There is not contaminated product Drilling Fluids for Horizontal Wells provided by the invention extremely strong inhibition coating property, good stability, suspension to take
Band property and good reservoir protection effect.In addition, not contaminated product Drilling Fluids for Horizontal Wells of the present invention is in use, it can
Mechanical separator speed is improved, down hole problem is reduced；While ensureing safely and fast drilling well, on well logging without influence, be conducive to and
Shi Faxian oil-gas Layers realize that application effect is good to the good protection of clastic reservoir rock, have significant economic benefit and society
Benefit.
The present invention also provides the not preparation methods of contaminated product Drilling Fluids for Horizontal Wells described in above-mentioned technical proposal, including：By institute
Water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive, temperature resisting agent and heavy weight additive mixing are stated, is obtained not
Contaminated product Drilling Fluids for Horizontal Wells.
In the present invention, the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive, temperature resistance
Agent and the mixing of heavy weight additive are preferably by the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive
It is mixed after temperature resisting agent mixing, then with heavy weight additive.
In the present invention, the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive and anti-
The mixing of warm agent preferably carries out under agitation；The present invention does not have particular/special requirement to the specific implementation mode of the stirring, with
It can realize the uniform mixing of raw material.In the present invention, the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax, cation are poly-
The mixing for closing object, fluid loss additive and temperature resisting agent further preferably includes following steps：
(1) bentonite is added to the water under agitation, prehydration processing for 24 hours, obtains prehydration feed liquid；
(2) under agitation, by the Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive and temperature resistance
Agent is added sequentially to the prehydration feed liquid.
In the present invention, the Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive and temperature resisting agent add respectively
After entering, the present invention preferably continues 1~2h of stir mixing after the addition of corresponding raw material, adds follow-up raw material.
In the present invention, the rate stirred in the step (1) is preferably 600~12000rpm；It is stirred in the step (2)
The rate mixed is preferably 500~12000rpm.
The present invention provides do not prepared described in contaminated product Drilling Fluids for Horizontal Wells or above-mentioned technical proposal described in above-mentioned technical proposal
Application of the not contaminated product Drilling Fluids for Horizontal Wells that method is prepared in horizontal drilling.The present invention is to the not contaminated product Horizontal Well Drilling
The specific implementation mode that well liquid is applied in horizontal drilling does not have particular/special requirement, using level well-known to those skilled in the art
The application mode of drilling fluid in drilling process.
Not contaminated product Drilling Fluids for Horizontal Wells provided by the invention and its preparation method and application is carried out with reference to embodiment
Detailed description, but they cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
The mass percent that water is accounted for according to remaining component weighs remaining each component, wherein bentonite 5%, Organosilicon Alcohol in Organic suppression
Preparation 1.0%, emulsified wax 2%, cationic emulsion copolymerization object 0.3%, cationic polymer fluid loss additive 0.5%, polypropylene
Nitrile ammonium salt 1.0%, sulfomethylation phenolic resin 1.5% and sulfonated lignite 1.6% prepare drilling fluid.
The Drilling Fluids for Horizontal Wells that embodiment 1 is prepared is under normal temperature state and after 150 DEG C of 16h of burin-in process
Basic property is as shown in table 1.
Basic property after the room temperature and burin-in process of the not contaminated product Drilling Fluids for Horizontal Wells that 1 embodiment 1 of table obtains
| Classification performance | Room temperature performance | Performance after 150 DEG C/16h high temperature ageings |
| Apparent viscosity AV (mpa.s) | 25~55 | 20~50 |
| Yield value YP (pa) | 10~20 | 5~15 |
| API filtration FL (mL) | 5~15 | 5~20 |
| Gel strength G10 " (pa) | 1~5 | 1~5 |
| Gel strength G10 ' (pa) | 1~15 | 1~15 |
| Mud cake coefficient of friction resistance Kf | <0.05 | <0.05 |
| High temperature and high pressure filter loss HTHP (mL) | 10~25 | 10~25 |
| Zeta potential ZETA (mv) | - 25~30 | - 30~25 |
By the data of table 1 it is found that performance difference is small before and after aging, drilling fluid is after downhole temperature shearing drilling well for a long time
Stabilizing mud properties.
The test equipment used in following viscosity (plastic viscosity and cut power) test process is Fann 35A rotary viscosity
Meter, uses petroleum industry standard method of measurement (test method of test equipment is API international standard).Filter loss test process is adopted
Use API filter tester.
Use grain size for the mud shale powder of 0.100mm~0.154mm, the not contaminated product horizontal well drilling obtained to embodiment 1
Liquid carry out anti-drilling bits pollutant performance detection, specially in drilling fluid add drilling fluid gross mass 5%, 10%, 15% or
After 20% mud shale powder, PV, YP and FL detection are carried out to drilling fluid, testing result is as shown in table 2.Wherein, PV plastic viscosities；
YP refers to yield value, and FL is API filtration (similarly hereinafter).
The anti-mud shale pollution capacity for the not contaminated product Drilling Fluids for Horizontal Wells that 2 embodiment 1 of table obtains
As shown in Table 2, with the increase of mud shale additive amount, the viscosity of Drilling Fluids for Horizontal Wells hardly happens variation, filter
Vector is in a slight decrease, shows that not there is contaminated product Drilling Fluids for Horizontal Wells very strong anti-drilling to consider pollution capacity to be worth doing for this.
Anti- NaCl pollutant performances detection is carried out to the not contaminated product Drilling Fluids for Horizontal Wells that embodiment 1 obtains, specially to configuration
0%, 5%, 10%, 15%, 20%, 25%, 30% NaCl of addition total weight is tested after stirring evenly in good drilling fluid,
Testing result is as shown in table 3.
The anti-NaCl pollutant performances for the not contaminated product Drilling Fluids for Horizontal Wells that 3 embodiment 1 of table obtains
As shown in Table 3, as the increase of NaCl additive amounts, Drilling Fluids for Horizontal Wells plastic viscosity are basically unchanged, yield value is micro-
Increase, ratio of dynamic shear force/yield value to plastic viscosity is basically unchanged, and shows that the Drilling Fluids for Horizontal Wells there are extremely strong anti-NaCl pollution capacities.
Anti- CaCl is carried out to the not contaminated product Drilling Fluids for Horizontal Wells that embodiment 1 obtains2Pollutant performance detects, specially to configuration
0%, 10%, 20%, 30%, 40%, 50%, 70% CaCl of total weight is added in good drilling fluid2It is surveyed after stirring evenly
Examination, testing result are as shown in table 4.
The anti-CaCl for the not contaminated product Drilling Fluids for Horizontal Wells that 4 embodiment 1 of table obtains2Pollutant performance
As shown in Table 4, with CaCl2The increase of dosage, Drilling Fluids for Horizontal Wells filter loss are gradually reduced, and show the Horizontal Well Drilling
Well liquid has good anti-CaCl2Pollution capacity.
Heat-resisting property detection is carried out to the not contaminated product Drilling Fluids for Horizontal Wells that embodiment 1 obtains, testing result is as shown in table 5.
The heat-resisting property for the not contaminated product Drilling Fluids for Horizontal Wells that 5 embodiment 1 of table obtains
As shown in Table 5, Drilling Fluids for Horizontal Wells provided by the invention has good temperature resistance, after high warm rolling,
Rheological characteristic, filter loss variation are little.
Inhibition detection is carried out to the not contaminated product Drilling Fluids for Horizontal Wells that embodiment 1 obtains, detection method is to be obtained in embodiment 1
To Drilling Fluids for Horizontal Wells, well slurry (drilling fluid of drilling well being had been used to, wherein containing the formation materials such as certain ground) and
50g shale is added in clear water, after heat rolling 16h under the conditions of 120 DEG C, shale is recycled, primary recovery is respectively
4.5%, 61.9% and 34.3%；Again after heat rolling 16h under the conditions of 120 DEG C, the secondary returning yield recycled to shale divides
It Wei 91.4%, 58.1% and 29.9%.As can be seen that there is Drilling Fluids for Horizontal Wells provided by the invention excellent shale to inhibit
Property.
In inhibition test process, the test result of shale expansion height is as shown in table 6.As shown in Table 6, through the horizontal well
Filtrate is below 10%KCl to the shale expansion height after shale immersion different time afterwards for drilling fluid, filtrate and constant temperature (120 DEG C)
Solution impregnates the shale expansion height after the same time.Wherein, filtrate refers to Drilling Fluids for Horizontal Wells after the experiment of API leak-offs
Liquid.As can be seen from Table 6, the drilling fluid, filtrate and constant temperature (120 DEG C) afterwards filtrate shale expansion height be below 10%KCl
The shale expansion height of solution.7~10%KCl is conventional shale inhibitor, its shale inhibition of 10% dosage is stronger, and data
It shows that the system drilling liquid is better than 10%KCl, there is good inhibition coating property.
The inhibition for the not contaminated product Drilling Fluids for Horizontal Wells that 6 embodiment 1 of table obtains
Exacerbation Detection of Stability is carried out to the Drilling Fluids for Horizontal Wells that embodiment 1 obtains, the dosage of heavy weight additive is 171g/L, is made
The density for obtaining the drilling fluid reaches 1.25g/cm3, the upper and lower part of drilling fluid after aggravating is extracted respectively and measures its item
Can, properties also front and back to 150 DEG C of high temperature detection of drilling fluid progress 16h are detected.Testing result such as 7 institute of table
Show.
The exacerbation stability for the not contaminated product Drilling Fluids for Horizontal Wells that 7 embodiment 1 of table obtains
As shown in Table 7, the drilling fluid that embodiment 1 obtains is not in difference of densities after aggravating, i.e., top density reduces,
Lower part density increases, and performance is stablized, and drilling fluid is good to barite suspension.
Embodiment 2
Horizontal well drilling formula of liquid is：50 parts of bentonite；10 parts of Organosilicon Alcohol in Organic inhibitor；20 parts of emulsified wax；Cation
3 parts of emulsion polymer；5 parts of cationic polymer fluid loss additive；10 parts of polyacrylonitrile amine salt；15 parts of sulfomethylation phenolic resin；
20 parts of sulfonated lignite；0 part of heavy weight additive；1000 parts of water.
Comparative example 1
According to 1000 parts of water and 50 parts of ratios of bentonite, slurries are prepared.
Comparative example 2
The ratio of 1000 parts of water, 20 parts of 50 parts of bentonite and emulsified wax prepares slurries.
Comparative example 3
The ratio of 1000 parts of water, 50 parts of bentonite, 10 parts of 25 parts of emulsified wax and Organosilicon Alcohol in Organic prepares slurries.
Comparative example 4
1000 parts of water, 50 parts of bentonite, 30 parts of emulsified wax, 10 parts of Organosilicon Alcohol in Organic, 3 parts of cationic polymer ratio match
Slurrying liquid.
The being lubricated property of drilling fluid and sealing characteristics provide the Drilling Fluids for Horizontal Wells in embodiment 2, comparative example 1~3
Detection, testing result are as shown in table 8.
The lubricity of the different drilling fluids of table 8 and seal-off effect test
As shown in Table 8, Drilling Fluids for Horizontal Wells provided by the invention has excellent lubricity and seal-off effect, cationic polymerization
The cooperation of object, emulsified wax and Organosilicon Alcohol in Organic is most important for the raising of drilling fluid lubricating.
Onsite application is carried out to 1 well of spark and 2 well of spark in Xinjiang Shaya border of the county, 1 well of spark and 2 well of spark are offset well,
Geological condition is close.2 well of spark uses 1 drilling fluid of embodiment, and cationic emulsion copolymerization object (DS-301), Organosilicon Alcohol in Organic suppression is added
The inhibition of system is enhanced after preparation (DS-302), it is suppressed that the borehole wall degrades chip off-falling, plays good anti-collapse inhibiting effect；Star
Fiery 2 wells test well section average rate of penetration 4.36m/h, hole enlargement ratio 3.7%.
1 well of spark is spudded in well construction well section using 1 drilling fluid three of comparative example：3000~5252m, average rate of penetration
3.12m/h.Hole enlargement ratio 5.3%.It can be seen that 2 well items drill standard of spark is better than 1 well of spark；Not contaminated product of the present invention
Drilling Fluids for Horizontal Wells in use, can improve mechanical separator speed.
Embodiment 3
The mass percent that water is accounted for according to remaining component weighs remaining each component, prepares drilling fluid, wherein 5% bentonite,
2%RHJ-l, 0.3%DS-301,1%DS-302,1.5%NH4-HPAN, 2%SMP, 2%SMC.
Embodiment 4
The mass percent that water is accounted for according to remaining component weighs remaining each component, prepares drilling fluid, wherein 5% bentonite,
3%RHJ-l, 0.3%DS-301,1%DS-302,1.5%NH4- HPAN, 2%SMP, 2%SMC.
Embodiment 5
The mass percent that water is accounted for according to remaining component weighs remaining each component, prepares drilling fluid, wherein 5% bentonite,
2%RHJ-l, 0.1%DS-301,1%DS-302,1.5%NH4- HPAN, 2%SMP, 2%SMC.
Embodiment 6
The mass percent that water is accounted for according to remaining component weighs remaining each component, prepares drilling fluid, wherein 5% bentonite,
2%RHJ-l, 0.3%DS-301,0.5%DS-302,1.5%NH4- HPAN, 2%SMP, 2%SMC.
Embodiment 7
The mass percent that water is accounted for according to remaining component weighs remaining each component, prepares drilling fluid, wherein 5% bentonite,
2%RHJ-l, 0.3%DS-301,1.5%DS-302,1.5%NH4- HPAN, 2%SMP, 2%SMC.
The drilling fluid that embodiment 3~7 obtains is tested for the property, test method respectively be previously mentioned corresponding performance
Unanimously, test result is as shown in table 9.
The performance test results of the table 9 to the drilling fluid of embodiment 3~7
As shown in Table 9, the drilling fluid that the present invention obtains has practical plastic viscosity, yield value.And has excellent filter
Mistake feature (<8mL)；Lubricating coefficient is low, and lubricity is good, meets the high lubricating requirement to net horizontal section；Inhibition is good, can effectively press down
The expansion of shale processed can effectively control the unstability that the borehole wall is brought by mud soak expansion and cave in.
Tahe Oilfield in Xinjiang rock core is selected, static pollution evaluation experiment, static state infiltration are carried out to the drilling fluid of different formulations
The results are shown in Table 10 for rate recovery value evaluation experimental.
The different drilling fluid system static state pollution evaluation experimental results of table 10
| Drilling fluid system | Ko/10-3μm2 | Kro/10-3μm2 | Krd/% |
| Sylvite polymeric system | 76.10 | 65.96 | 86.7 |
| Formula 1 | 58.34 | 52.62 | 90.2 |
| Formula 2 | 78.16 | 75.15 | 96.1 |
| Formula 3 | 93.70 | 90.44 | 96.5 |
Note：In table 10, in terms of mass percentage, in sylvite polymeric system containing 3% bentonite, 0.5%KPAM,
1%NH4The water of-HPAN and surplus；Formula 1：3% bentonite, 0.3%DS-301,2%RHJ-1 and water；Formula 2：3% swelling
Soil, 0.3%DS-301,2.5%RHJ-1,1%DS-302 and water；Formula 3：3% bentonite, 0.3%DS-301,3%RHJ-1,
1%DS-302,1.5%NH4- HPAN, 2%SMC, 2%SMP and water.Other components other than water in 10 4 kinds of drilling fluid systems of table
Dosage to account in corresponding system in terms of the mass percent of water.
Ko is the preceding oleic permeability of pollution, Kro is oleic permeability after pollution is instead arranged, Krd=Kro/Ko × 100% is to ooze
Saturating rate recovery value.
As can be seen from Table 10, the static permeability resume figure of drilling fluid system of the present invention is met in three kinds of drilling fluid systems
Highest can reach 96.5%, higher than it has been generally acknowledged that the polyacrylic acid potassium drilling fluid system with preferable reservoir protection effect.
It can be seen that drilling fluid system provided by the invention has preferable reservoir protection effect.
As seen from the above embodiment, the present invention is without adding oily substance, through cationic polymer, emulsified wax and organic
Silanol inhibitor coordinates jointly, effectively improves the lubricity of drilling fluid, and can effectively neutralize the negative electrical charge in clay, reduces
Clay water sensitivity improves borehole wall stability, meets horizontal well drilling in the process to the needs of drilling fluid.It is provided by the invention not mix
Grease horizontal well drilling fluid avoids being mixed into for crude oil, biological poison EC50 >=30000mg/L from having environmental protection, low toxicity characteristic.Also, this
The fluorescence grade for inventing the not contaminated product Drilling Fluids for Horizontal Wells provided is less than 4 grades, meets prospect pit well logging requirement, is conducive to oil-gas Layer
It was found that.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of not contaminated product Drilling Fluids for Horizontal Wells, does not contain oily substance, includes the component of following mass parts：
2. not contaminated product Drilling Fluids for Horizontal Wells according to claim 1, which is characterized in that the Organosilicon Alcohol in Organic includes modified first
Base silicone oil.
3. not contaminated product Drilling Fluids for Horizontal Wells according to claim 1, which is characterized in that the cationic polymer includes sun
Ion poly propenoic acid/salts copolymer.
4. not contaminated product Drilling Fluids for Horizontal Wells according to claim 1, which is characterized in that the fluid loss additive includes polypropylene
It is one or more in nitrile amine salt, sulfonated-pheno-formoldehyde resin and sulfonated lignite.
5. not contaminated product Drilling Fluids for Horizontal Wells according to claim 1, which is characterized in that the temperature resisting agent includes sulfomethylation
Phenolic resin and/or sulfonated lignite.
6. not contaminated product Drilling Fluids for Horizontal Wells according to claim 5, which is characterized in that when the temperature resisting agent includes sulphur methyl
When changing phenolic resin and sulfonated lignite, the mass ratio of the sulfomethylation phenolic resin and sulfonated lignite is (15~25)：(15~
25)。
7. not contaminated product Drilling Fluids for Horizontal Wells according to claim 1, which is characterized in that the heavy weight additive includes barite.
8. the not preparation method of contaminated product Drilling Fluids for Horizontal Wells described in claim 1~7 any one, including：By the water, swelling
Soil, Organosilicon Alcohol in Organic, emulsified wax, cationic polymer, fluid loss additive, temperature resisting agent and heavy weight additive mixing, it is horizontal to obtain not contaminated product
Well drilling fluid.
9. preparation method according to claim 8, which is characterized in that the water, bentonite, Organosilicon Alcohol in Organic, emulsified wax,
Cationic polymer, fluid loss additive, temperature resisting agent and heavy weight additive are mixed into the water, bentonite, Organosilicon Alcohol in Organic, emulsification stone
After wax, cationic polymer, fluid loss additive and temperature resisting agent mixing, then mix with heavy weight additive.
10. not any one of contaminated product Drilling Fluids for Horizontal Wells or claim 8~9 preparation side described in any one of claim 1~7
Application of the not contaminated product Drilling Fluids for Horizontal Wells that method is prepared in horizontal drilling.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105623627A (en) * | 2014-11-06 | 2016-06-01 | 中国石油化工股份有限公司 | Ultra-high temperature salt-resistant drilling fluid and preparation method thereof |
| CN106381135A (en) * | 2016-08-29 | 2017-02-08 | 中国地质大学（北京） | High-temperature-resistant low-filtration retaining wall water-based drilling fluid |
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2018
- 2018-04-23 CN CN201810367135.XA patent/CN108384526A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105623627A (en) * | 2014-11-06 | 2016-06-01 | 中国石油化工股份有限公司 | Ultra-high temperature salt-resistant drilling fluid and preparation method thereof |
| CN106381135A (en) * | 2016-08-29 | 2017-02-08 | 中国地质大学（北京） | High-temperature-resistant low-filtration retaining wall water-based drilling fluid |
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| Title |
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| 吴富生等: "悬浮乳液钻井液的研究与应用", 《钻井液与完井液》 * |
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Application publication date: 20180810 |