CN108276974A - A kind of deep water constant current change synthetic base drilling fluid - Google Patents
A kind of deep water constant current change synthetic base drilling fluid Download PDFInfo
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Abstract
The present invention provides a kind of deep water constant currents to become synthetic base drilling fluid, belongs to petroleum gas deepwater drilling engineering field.The present invention includes the component of following parts by weight：100 parts of grease mixed phases, 1.5~3.0 parts of emulsifiers, 1~2 part of alkalinity regulator, 0.5~1.5 part of organoclay, 1~3 portion of synthesis of organic substance class fluid loss additive, 0.5~1.0 portion of natural organic matter class fluid loss additive, 0~100 part of heavy weight additive.The present invention improves the permanent rheological property that deep water constant current becomes synthetic base drilling fluid by the synergistic effect of emulsifier, synthesis of organic substance class fluid loss additive and natural organic matter class fluid loss additive, " constant current change " feature with real meaning, apparent viscosity, plastic viscosity, yield value, 3 turns reading change it is smaller, amplitude be each temperature condition under maximum difference be less than 3.
Description
Technical field
The present invention relates to petroleum gas deepwater drilling field of engineering technology more particularly to a kind of deep water constant current to become synthesis base
Drilling fluid.
Background technology
With being on the increase for energy demand, gas and oil in sea gradually moves towards deep-sea from coastal waters, and deep-sea is surveyed
Spy exploitation is faced with a series of drilling engineering technical barriers, deep water and ultra deepwater drilling caused by deep water, ultra-deep-water and is faced with
Gas hydrates block pipeline, and drilling fluid low temperature viscosity is excessive and running pulp, deep water stratum undercompaction and the borehole well instability brought
A series of problems, such as.Oil base drilling fluid and synthetic base drilling fluid are the optimal selections to solve the above problems.Since seawater is with dampening
Deep increase, temperature drastically reduce, this section substantially belongs to extremely low temperature, especially mud line in 300~3000m for deep water and ultra-deep-water
Nearby only 4 DEG C or so, and in drilling process, when circulation of drilling fluid, due to the cooling effect of subsea cryogenic seawater to be passed through,
And drilling fluid is caused to return out to a lower temperature is still maintained when drilling platforms, because of traditional oil base drilling fluid and synthesis
The rheological characteristic of base drilling fluid is affected by temperature bigger, and may result in drilling fluid can cause after returning out platform viscosity excessive and be run
The problems such as slurry, seriously restricts deepwater drilling operation.For this problem, a large amount of research has been carried out both at home and abroad, it is proposed that " permanent
The concept of rheology ", i.e., the drilling fluid rheology performance that (4~65 DEG C) are kept constant in certain temperature range, especially yield value
It is read with 3 turns invariable.
Traditional oil base drilling fluid is prepared using diesel oil, mineral white oil substantially, these raw materials have certain toxicity,
Therefore, it is synthetic base drilling fluid that deep water or ultra-deep-water, which usually use,.
Although a large amount of document and patent are proposed the concept of " constant current change " both at home and abroad, and within the scope of 4~65 DEG C
Yield value and 3 turns of readings remain apparent viscosity to belong to the feature with " constant current change " according to identification drilling fluid
The phenomenon that increasing with the reduction of temperature with plastic viscosity, and the prodigious problem of increased amplitude, such as Chinese patent
All there is this problem, apparent viscosity and modelings in CN102807848A, 201510952579.6 and 201510218323.2
Property viscosity increase with the reduction of temperature, drilling fluid can bring certain pressure to leak ground in pumping procedure in drilling process
The risk of layer.
Invention content
In view of this, the purpose of the present invention is to provide a kind of deep water constant currents to become synthetic base drilling fluid.It is provided by the invention
Deep water constant current becomes synthetic base drilling fluid apparent viscosity and plastic viscosity variation with temperature amplitude is small, maximum under each temperature condition
Difference is less than 3.
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 deep water constant currents to become synthetic base drilling fluid, includes the component of following parts by weight：
Preferably, the grease mixed phase includes the synthetic-based mud of 70~85 parts of volume parts, 15~30 parts of volume parts
Calcium chloride water.
Preferably, the synthetic-based mud includes gas liquefaction, C8~20N-alkane and C8~20Isoparaffin in one kind
Or it is several；The mass fraction of the calcium chloride water is 20~40%.
Preferably, the emulsifier is prepared by the component including following parts by weight：15~20 parts of tall oil fatties
Acid, 15~20 parts of oleic acid, 15~20 parts of erucic acid, 10~20 parts of octatecatrienoic acids, 15~20 parts of diethylenetriamines, 5~10 parts
Glycerine.
Preferably, the alkalinity regulator includes one or more of calcium oxide, magnesia and calcium hydroxide.
Preferably, the synthesis of organic substance class fluid loss additive is nano pipe/polyhenylethylene acrylic emulsion.
Preferably, the nano pipe/polyhenylethylene acrylic emulsion is prepared by the component including following parts by weight：100
Part water, 5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolin, 2 parts of polyvinyl alcohol, 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of benzene
Ethylene, 20 parts of vinyl chloride, 2 parts of ammonium persulfates, 5 parts of calcium oxide.
Preferably, the natural organic matter class fluid loss additive includes bitumen, Native Oxide pitch and humic acid acetamide
One or more of resin.
Preferably, the heavy weight additive is barite and/or calcium carbonate.
Preferably, the organoclay includes organobentonite.
The present invention provides a kind of deep water constant currents to become synthetic base drilling fluid, includes the component of following parts by weight：100 parts of oil
Water mixed phase, 1.5~3.0 parts of emulsifiers, 1~2 part of alkalinity regulator, 0.5~1.5 part of organoclay, 1~3 part of synthesis of organic substance class
Fluid loss additive, 0.5~1.0 portion of natural organic matter class fluid loss additive, 0~100 part of heavy weight additive.The present invention passes through emulsifier, synthesis
The synergistic effect of organic species fluid loss additive and natural organic matter class fluid loss additive improves deep water constant current and becomes synthetic base drilling fluid
Permanent rheological property, with real meaning " constant current change " feature, apparent viscosity, plastic viscosity, yield value, 3 turns of readings become
Change is smaller, and amplitude of variation is that maximum difference is less than 3 under each temperature condition；Also, deep water constant current provided by the invention becomes synthesis
Base drilling fluid has the characteristics that electrical stability is high, high temperature and pressure dehydration is low；The present invention by adjusting heavy weight additive dosage so that it is deep
The density adjusting range that water constant current becomes synthetic base drilling fluid reaches 0.9~1.6g/cm3, disclosure satisfy that deep water and ultra deepwater drilling
Needs；Deep water constant current provided by the invention, which becomes synthetic base drilling fluid, has bio-toxicity low, the good feature of degradability.
Specific implementation mode
The present invention provides a kind of deep water constant currents to become synthetic base drilling fluid, includes the component of following parts by weight：
In the present invention, the grease mixed phase preferably includes the synthetic-based mud of 70~85 parts of volume parts, 15~30 parts of bodies
The calcium chloride water of product number.In the present invention, the grease mixed phase is the matrix that deep water constant current becomes synthetic base drilling fluid.At this
In invention, the synthetic-based mud preferably includes gas liquefaction, C8~20N-alkane and C8~20Isoparaffin in one kind or several
Kind；The mass fraction of the calcium chloride water is preferably 20~40%, and more preferably 26~30%.When the synthetic-based mud is
When mixture, the present invention does not have special restriction to the amount ratio of each substance in the mixture, using the mixing of arbitrary proportion
Object.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 1.5~3.0 parts of emulsifier, preferably 2~2.5 parts.In the present invention, the emulsifier is preferably by including following parts by weight
Several components are prepared：15~20 parts of ready denier oil acids, 15~20 parts of oleic acid, 15~20 parts of erucic acid, 10~20 part 18
Carbon trienic acid, 15~20 parts of diethylenetriamines, 5~10 parts of glycerine.In the present invention, the emulsifier is integrated emulsifier.
In the present invention, the preparation method of the emulsifier preferably includes following steps：
160 DEG C are heated to after ready denier oil acid, oleic acid and erucic acid are mixed, vacuumizes and for -0.1MPa be grafted instead
After answering 2h, octatecatrienoic acid is added and continues after being warming up to 320 DEG C of generation graft reaction 5h in 1h, 200 are cooled in 30min
DEG C, be added diethylenetriamine continue to neutralize and be dehydrated and imidazoles reaction 2h after, 70 DEG C are cooled in 1h, be added 5~10 parts it is sweet
Oil, to get emulsifier after reduced-pressure backflow 2h dehydrations.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 1~3.0 part of synthesis of organic substance class fluid loss additive, preferably 2~2.5 parts.In the present invention, the synthesis of organic substance class drop
Fluid loss agents are preferably nano pipe/polyhenylethylene acrylic emulsion.In the present invention, the nano pipe/polyhenylethylene acrylic emulsion is preferred
It is prepared by the component including following parts by weight：100 parts of water, 5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolin, 2 parts it is poly-
Vinyl alcohol, 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of styrene, 20 parts of vinyl chloride, 2 parts of ammonium persulfates, 5 parts of calcium oxide.
In the present invention, the synthesis of organic substance class fluid loss additive is liquid fluid loss additive.
In the present invention, the preparation method of the nano pipe/polyhenylethylene acrylic emulsion preferably includes following steps：
By water, fatty alcohol polyoxyethylene ether, kaolin and polyvinyl alcohol, acrylic acid, acrylate, styrene is added
After emulsion reaction 2h occurs with maintaining nitrogen purge after vinyl chloride, ammonium persulfate is added, and be heated to 120 DEG C, pressure is controlled 1.2
~1.5MPa carries out polymerisation and obtains polymerizate, after 70 DEG C are cooled in polymerizate 1h, and oxidation is added after keeping the temperature 3h
Calcium carries out neutralization reaction, obtains nano pipe/polyhenylethylene acrylic emulsion.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 0.5~1.0 part of natural organic matter class fluid loss additive.In the present invention, the natural organic matter class fluid loss additive includes day
One or more of right pitch, Native Oxide pitch and humic acid acetamide resin；When the natural organic matter class fluid loss additive
For mixture when, the present invention does not have special restriction to the amount ratio of each natural organic matter class fluid loss additive in the mixture,
Using the mixture of arbitrary proportion.
The synergistic effect that the present invention passes through emulsifier, synthesis of organic substance class fluid loss additive and natural organic matter class fluid loss additive
Improve deep water constant current become synthetic base drilling fluid permanent rheological property, with real meaning " constant current change " feature, apparent viscosity,
Plastic viscosity, yield value, 3 turns reading change it is smaller, amplitude of variation be each temperature condition under maximum difference be less than 3, simultaneously
Emulsifier, synthesis of organic substance class fluid loss additive and natural organic matter class fluid loss additive collective effect make deep water constant current become synthesis base
Drilling fluid has the characteristics that electrical stability is high, high temperature and pressure dehydration is low.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 1~2 part of alkalinity regulator, preferably 1.5 parts.In the present invention, the alkalinity regulator preferably includes calcium oxide, oxidation
One or more of magnesium and calcium hydroxide, when the alkalinity regulator is mixture, the present invention is to each in the mixture
The amount ratio of alkalinity regulator does not have special restriction, using the mixture of arbitrary proportion.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 0~100 part of heavy weight additive, preferably 32~50 parts.In the present invention, the heavy weight additive is preferably barite and/or carbonic acid
Calcium.In the present invention, the heavy weight additive can adjust the density that deep water constant current becomes synthetic base drilling fluid, by adjusting the use of heavy weight additive
Amount so that the density of deep water constant current change synthetic base drilling fluid disclosure satisfy that the needs of deep water and ultra deepwater drilling.
On the basis of the grease mixed phase of 100 parts of parts by weight, deep water constant current provided by the invention becomes synthetic base drilling fluid packet
Include 0.5~1.5 part of organoclay, preferably 1.0 parts.In the present invention, the organoclay is preferably organobentonite.The present invention
There is no special restriction to the source of the organoclay, using commercial goods well known to those skilled in the art.
In the present invention, described in above-mentioned technical proposal deep water constant current become synthetic base drilling fluid preparation method preferably include with
Lower step：
By grease mixed phase, emulsifier, alkalinity regulator, organoclay, synthesis of organic substance class fluid loss additive, natural organic matter class
Fluid loss additive and heavy weight additive mixing, obtain deep water constant current and become synthetic base drilling fluid.
The present invention is to the grease mixed phase, emulsifier, alkalinity regulator, organoclay, synthesis of organic substance class fluid loss additive, day
The addition sequence of right organic species fluid loss additive and heavy weight additive does not have special restriction, is added using well known to those skilled in the art
Material sequence；The present invention does not have the concrete mode of the mixing a special restriction, use is well known to those skilled in the art,
The mode that each raw material can be uniformly mixed, specifically, as stirred.
Become synthetic base drilling fluid to deep water constant current provided by the invention with reference to embodiment to be described in detail, still
They cannot be interpreted as limiting the scope of the present invention.
Embodiment 1
A kind of deep water constant current change synthetic base drilling fluid includes the component of following parts by weight：100 parts of grease mixed phases, 1.5 parts
Emulsifier, 1 part of calcium oxide, 1.5 parts of organobentonites, 3 parts of nanometer styrene acrylic emulsions, 0.5 part of bitumen, 0 part adds
Heavy prescription.
Grease mixed phase is the mixed phase of synthetic-based mud and calcium chloride brine, specially 70 parts of synthetic-based muds, 30 parts of calcium chloride
Aqueous solution；Synthetic-based mud is gas liquefaction；The mass fraction of calcium chloride water is 20%.
The synthesis technology of emulsifier is：15 parts of ready denier oil acid, 15 parts of oleic acid, 15 parts of erucic acid are mixed and be warming up to
It 160 DEG C, after vacuumizing -0.1MPa reactions 2h, is added after 10 parts of octatecatrienoic acid is continuously heating to 320 DEG C of reaction 5h, drop
After to 200 DEG C 15 parts of diethylenetriamine is added the reaction was continued 2h in temperature, 70 DEG C are cooled to, 5 parts of glycerine are added, reduced-pressure backflow 2h is de-
To get emulsifier after water.
Nanometer styrene acrylic emulsion synthesis technology be：5 parts of aliphatic alcohol polyethenoxy is added in 100 parts of water
Ether, 5 parts of kaolin, 2 parts of polyvinyl alcohol, after stirring evenly, the acrylic acid of 10 parts of addition, 30 parts of acrylate, 50 parts
Styrene, after persistently stirring makes it emulsify 2h in the case of maintaining nitrogen purge, 2 parts of ammonium persulfates are added in 20 parts of vinyl chloride,
And 120 DEG C are heated to, pressure control is in 1.2MPa, after reacting 3h, reduces temperature to 70 DEG C, 5 parts of calcium oxide is added, the reaction was continued
Up to synthesis of organic substance class fluid loss additive after 1h.
Deep water constant current becomes the preparation method of synthetic base drilling fluid, includes the following steps：
By grease mixed phase, emulsifier, alkalinity regulator, organoclay, synthesis of organic substance class fluid loss additive and natural organic matter
Class fluid loss additive is uniformly mixed under agitation, is obtained deep water constant current and is become synthetic base drilling fluid.
Embodiment 2
A kind of deep water constant current change synthetic base drilling fluid includes the component of following parts by weight：100 parts of grease mixed phases, 3.0 parts
Emulsifier, 2 parts of calcium oxide, 0.5 part of organobentonite, 1 portion of synthesis of organic substance class fluid loss additive, 1.0 parts of humic acid acetamide resins,
32 parts of barites.
Grease mixed phase is the mixed phase of synthetic-based mud and calcium chloride brine, specially 75 parts of synthetic-based muds, 25 parts of calcium chloride
Aqueous solution, synthetic-based mud are isoparaffin (C8~20), calcium chloride water mass fraction is 40%.
The synthesis technology of emulsifier is：20 parts of ready denier oil acid, 20 parts of oleic acid, 20 parts of erucic acid are mixed and be warming up to
It 160 DEG C, after vacuumizing -0.1MPa reactions 2h, is added after 20 parts of octatecatrienoic acid is continuously heating to 320 DEG C of reaction 5h, drop
After to 200 DEG C 20 parts of diethylenetriamine is added the reaction was continued 2h in temperature, 70 DEG C are cooled to, 10 parts of glycerine, reduced-pressure backflow 2h is added
To get emulsifier after dehydration.
Synthesis of organic substance class fluid loss additive fluid loss additive is nanometer styrene acrylic emulsion, and specific synthesis technology is：
5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolin, 2 parts of polyvinyl alcohol are added in 100 parts of water, after stirring evenly, adds
Enter 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of styrene, 20 parts of vinyl chloride holds in the case of maintaining nitrogen purge
After continuous stirring makes it emulsify 2h, 2 parts of ammonium persulfates are added, and be heated to 120 DEG C, pressure control is in 1.5MPa, after reacting 3h, drop
5 parts of calcium oxide are added to 70 DEG C in low temperature, up to synthesis of organic substance class fluid loss additive after the reaction was continued 1h.
The preparation method that the present embodiment deep water constant current becomes synthetic base drilling fluid is same as Example 1.
Embodiment 3
A kind of deep water constant current change synthetic base drilling fluid includes the component of following parts by weight：100 parts of grease mixed phases, 2.0 parts
Emulsifier, 1.5 parts of calcium hydroxides, 1.0 parts of organobentonites, 2 portions of synthesis of organic substance class fluid loss additives, 0.5 part of oxidized asphalt, 50
Part calcium bicarbonate.
Grease mixed phase is the mixed phase of synthetic-based mud and calcium chloride brine, specially 80 parts of synthetic-based muds, 20 parts of calcium chloride
Aqueous solution, synthetic-based mud are n-alkane (C8~20), calcium chloride water mass fraction is 26%.
The synthesis technology of emulsifier is：15 parts of ready denier oil acid, 20 parts of oleic acid, 10 parts of erucic acid are mixed and be warming up to
It 160 DEG C, after vacuumizing -0.1MPa reactions 2h, is added after 20 parts of octatecatrienoic acid is continuously heating to 320 DEG C of reaction 5h, drop
After to 200 DEG C 15 parts of diethylenetriamine is added the reaction was continued 2h in temperature, 70 DEG C are cooled to, 5 parts of glycerine are added, reduced-pressure backflow 2h is de-
To get emulsifier after water.
Synthesis of organic substance class fluid loss additive fluid loss additive is nanometer styrene acrylic emulsion, and specific synthesis technology is：
5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolin, 2 parts of polyvinyl alcohol are added in 100 parts of water, after stirring evenly, adds
Enter 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of styrene, 20 parts of vinyl chloride holds in the case of maintaining nitrogen purge
After continuous stirring makes it emulsify 2h, 2 parts of ammonium persulfates are added, and be heated to 120 DEG C, pressure control is in 1.5MPa, after reacting 3h, drop
5 parts of calcium oxide are added to 70 DEG C in low temperature, up to synthesis of organic substance class fluid loss additive after the reaction was continued 1h.
The preparation method that the present embodiment deep water constant current becomes synthetic base drilling fluid is same as Example 1.
Embodiment 4
A kind of deep water constant current change synthetic base drilling fluid includes the component of following parts by weight：100 parts of grease mixed phases, 3.0 parts
Emulsifier, 1.5 parts of alkalinity regulators (calcium oxide and calcium hydroxides in mass ratio 1:1 compounding), 1.0 parts of organobentonites, 2 parts of conjunctions
At organic species fluid loss additive, (bitumen and humic acid acetamide resin are in mass ratio for 0.5 portion of natural organic matter class fluid loss additive
1:1 is used in compounding), 100 parts of barites.
Grease mixed phase is the mixed phase of synthetic-based mud and calcium chloride brine, specially 85 parts of synthetic-based muds, 15 parts of calcium chloride
Aqueous solution, synthetic-based mud are isoparaffin (C8~20), calcium chloride water mass fraction is 30%.
The synthesis technology of emulsifier is：20 parts of ready denier oil acid, 20 parts of oleic acid, 15 parts of erucic acid are mixed and be warming up to
It 160 DEG C, after vacuumizing -0.1MPa reactions 2h, is added after 15 parts of octatecatrienoic acid is continuously heating to 320 DEG C of reaction 5h, drop
After to 200 DEG C 15 parts of diethylenetriamine is added the reaction was continued 2h in temperature, 70 DEG C are cooled to, 10 parts of glycerine, reduced-pressure backflow 2h is added
To get emulsifier after dehydration.
Synthesis of organic substance class fluid loss additive fluid loss additive is nanometer styrene acrylic emulsion, and specific synthesis technology is：
5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolin, 2 parts of polyvinyl alcohol are added in 100 parts of water, after stirring evenly, adds
Enter 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of styrene, 20 parts of vinyl chloride holds in the case of maintaining nitrogen purge
After continuous stirring makes it emulsify 2h, 2 parts of ammonium persulfates are added, and be heated to 120 DEG C, pressure control is in 1.2MPa, after reacting 3h, drop
5 parts of calcium oxide are added to 70 DEG C in low temperature, up to synthesis of organic substance class fluid loss additive after the reaction was continued 1h.
The preparation method that the present embodiment deep water constant current becomes synthetic base drilling fluid is same as Example 1.
Comparative example 1
Commercially available SPE90987 tablets stream synthetic base drilling fluid, density are unknown.
Comparative example 2
A kind of deep water constant currents of Chinese patent application publication No. CN 104861944A become oil base drilling fluid, ρ=1.5g/cm3。
Comparative example 3
A kind of coal liquifaction deep water constant currents of Chinese patent Authorization Notice No. CN 102807848B become synthetic base drilling fluid.
The performance of 1~3 each drilling fluid of Examples 1 to 4 and comparative example is tested, the results are shown in Table 1, by table 1
As can be seen that deep water constant current produced by the present invention become synthetic base drilling fluid have at different temperatures apparent viscosity, plastic viscosity,
The difference of yield value, which is respectively less than, is equal to 3, realizes real " constant current change ", realizes apparent glue in performance compared with comparative example
The difference smaller of degree and plastic viscosity, and several comparative examples all have larger apparent viscosity and plastic viscosity difference, it is only dynamic to cut
Power is shown as " constant ", and it is even more to realize to appoint within the scope of 4~65 DEG C that deep water constant current produced by the present invention, which becomes synthetic base drilling fluid,
The rheological property " constant " for temperature of anticipating.
The basic performance of 1~3 each drilling fluid of 1 Examples 1 to 4 of table and comparative example
The present invention further has rated the antifouling property that deep water constant current in above-described embodiment becomes synthetic base drilling fluid, with this
Judge whether the oil base drilling fluid can be influenced by external contaminant, has carried out the antipollution of seriation by taking embodiment 2 as an example
Performance evaluation, the results are shown in Table 2, as can be seen from Table 2, deep water constant current provided by the invention become synthetic base drilling fluid by
After external contaminant pollution, good rheological stability energy is still shown, disclosure satisfy that deep water, ultra-deep-water to drilling fluid low temperature
The requirement of rheological characteristic.
Deep water constant current made from 2 embodiment 2 of table becomes the antifouling property table of synthetic base drilling fluid
Note：In Tables 1 and 2：
ρ：Drilling fluid density, g/cm3
T：Drilling fluid aging temperature, DEG C
TIt surveys：Drilling fluid rheology test temperature, DEG C
AV：Drilling fluid apparent viscosity, mPas
PV：Drilling fluid plastic viscosity, mPas
YP：Drilling fluid yield value, Pa
Φ3：Six fast 3 turns of rotational viscometers are read, dimensionless
HTHP：Drilling fluid high-temperature high pressure dehydration (3.5MPa, T, 30min), mL
ES：Drilling fluid electrical stability, V.
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 deep water constant current becomes synthetic base drilling fluid, include the component of following parts by weight：
2. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the grease mixed phase includes 70
The synthetic-based mud of~85 parts of volume parts, the calcium chloride water of 15~30 parts of volume parts.
3. deep water constant current according to claim 2 becomes synthetic base drilling fluid, which is characterized in that the synthetic-based mud includes gas
Liquefaction, C8~20N-alkane and C8~20One or more of isoparaffin；The mass fraction of the calcium chloride water
It is 20~40%.
4. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the emulsifier by include with
The component of lower parts by weight is prepared：15~20 parts of ready denier oil acids, 15~20 parts of oleic acid, 15~20 parts of erucic acid, 10~
20 parts of octatecatrienoic acids, 15~20 parts of diethylenetriamines, 5~10 parts of glycerine.
5. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the alkalinity regulator includes
One or more of calcium oxide, magnesia and calcium hydroxide.
6. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the synthesis of organic substance class drop
Fluid loss agents are nano pipe/polyhenylethylene acrylic emulsion.
7. deep water constant current according to claim 6 becomes synthetic base drilling fluid, which is characterized in that the nano pipe/polyhenylethylene third
Olefin(e) acid lotion is prepared by the component including following parts by weight：100 parts of water, 5 parts of fatty alcohol polyoxyethylene ether, 5 parts of kaolinites
Soil, 2 parts of polyvinyl alcohol, 10 parts of acrylic acid, 30 parts of acrylate, 50 parts of styrene, 20 parts of vinyl chloride, 2 parts of ammonium persulfates, 5 parts
Calcium oxide.
8. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the natural organic matter class drop
Fluid loss agents include one or more of bitumen, Native Oxide pitch and humic acid acetamide resin.
9. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the heavy weight additive is barite
And/or calcium carbonate.
10. deep water constant current according to claim 1 becomes synthetic base drilling fluid, which is characterized in that the organoclay includes
Machine bentonite.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564387A (en) * | 2019-08-22 | 2019-12-13 | 中国石油集团长城钻探工程有限公司 | ultrahigh-density environment-friendly gas-to-oil synthetic base drilling fluid and preparation method thereof |
| CN110564386A (en) * | 2019-06-10 | 2019-12-13 | 北京大学 | Oil-water emulsion emulsifier composition |
| CN116410709A (en) * | 2021-12-31 | 2023-07-11 | 中国石油天然气集团有限公司 | Synthetic base drilling fluid with flat plate flow pattern characteristics and preparation method thereof |
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| CN110564386A (en) * | 2019-06-10 | 2019-12-13 | 北京大学 | Oil-water emulsion emulsifier composition |
| CN110564387A (en) * | 2019-08-22 | 2019-12-13 | 中国石油集团长城钻探工程有限公司 | ultrahigh-density environment-friendly gas-to-oil synthetic base drilling fluid and preparation method thereof |
| CN110564387B (en) * | 2019-08-22 | 2021-11-09 | 中国石油天然气集团有限公司 | Ultrahigh-density environment-friendly gas-to-oil synthetic base drilling fluid and preparation method thereof |
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