CN109517587A - A kind of biomass synthetic base drilling fluid and preparation method thereof - Google Patents
A kind of biomass synthetic base drilling fluid and preparation method thereof Download PDFInfo
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- CN109517587A CN109517587A CN201710845975.8A CN201710845975A CN109517587A CN 109517587 A CN109517587 A CN 109517587A CN 201710845975 A CN201710845975 A CN 201710845975A CN 109517587 A CN109517587 A CN 109517587A
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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
- C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based
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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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
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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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Abstract
The present invention provides a kind of biomass synthetic base drilling fluids and preparation method thereof, belong to petroleum gas environment-friendly type synthetic base drilling fluid Extended Technology field.The present invention provides a kind of biomass synthetic base drilling fluids, comprising: biomass base fluid；CaCl2Aqueous solution；Organoclay；Emulsifier；Wetting agent；Fluid loss additive；CaO；Barite.Biomass base fluid, emulsifier and wetting agent have synergistic effect in the present invention, in drilling fluid under the comprehensive function of various composition, make biomass synthetic base drilling fluid better performances provided by the invention, and it is raw materials used it is environmentally protective, price is lower, biological degradability is good, is a kind of novel green syt base drilling fluid.
Description
Technical field
The present invention relates to drilling liquid technology fields, more particularly to are a kind of biomass synthetic base drilling fluid and its preparation side
Method.
Background technique
With boring, chance deep & ultra-deep well, horizontal well, the quantity of high-inclination directional well are more and more, bore and meet strong retraction stratum
Probability is higher and higher, and synthetic base drilling fluid is used widely because having the performances such as excellent lubrication, inhibition.However, using at present
It is mainly the chemical products such as mineral oil, alkene, alkylbenzene, linear paraffin in the base fluid for preparing synthetic base drilling fluid, exists certain
Environmental toxicity, the defects of biodegradability is poor has been restricted in the application of some environmentally sensitive areas.
Application No. is 201210579597.0 Chinese patent literatures to disclose a kind of synthetic base drilling fluid, the base fluid of use
For linear paraffin.Application No. is 201110292911.2 Chinese patent literatures to disclose a kind of synthetic base drilling fluid, used
Base fluid is limonene, dipentene, ethylene glycol monobutyl ether, alkyl glycosides, alcohol ether carboxylate, white oil and simethicone mixture.
Application No. is 201210251278.7 Chinese patent literatures to disclose a kind of coal oil constant current change synthetic base drilling fluid, used
Base fluid is coal oil.Although synthetic base drilling fluid disclosed above meets the probing demand of different Holes of Complicated Wells in performance,
It is to be analyzed in terms of environment acceptable degree, since the base fluid used is alkane derivative, biodegradable difficulty is big, subsequent
Because being listed in " National Hazard waste register " containing hydrocarbon/aqueous mixtures, (dangerous waste register number is HW- to the drilling cuttings generated after use
08), indicated above, traditional synthetic base drilling fluid environment acceptable degree is low.
It is increasingly strict with national requirements for environmental protection, develop environment-friendly type synthetic base drilling fluid, has become drilling fluid research
With the Main way of application.Therefore, exploitation lubrication, rejection are strong, and have both environmentally protective, biodegradable drilling fluid
System becomes the emphasis of those skilled in the art's research.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of biomass synthetic base drilling fluid and preparation method thereof, this hair
The biomass synthetic base drilling fluid of bright offer has preferable lubrication, rejection, at the same have both again it is environmentally protective, can biology drop
Xie Xing.
The present invention provides a kind of biomass synthetic base drilling fluids, comprising:
Biomass base fluid；
CaCl2Aqueous solution；
Organoclay；
Emulsifier；
Wetting agent；
Fluid loss additive；
CaO；
Barite.
In the present invention, the biomass has Formulas I structure:
In Formulas I, R is selected from amyl, hexyl, heptyl or octyl.
In the present invention, the molecular weight of the biomass is preferably 256~298, and more preferably 270~280；The biology
The appearance of matter is in colourless transparent liquid or light yellow transparent liquid.In the present invention, the biomass is preferably laurel amyl ether, the moon
Osmanthus hexyl ether, laurel heptyl ether or laurel octyl ether.In the present invention, the lubricating coefficient of the biomass is preferably 0.06~0.09, more
Preferably 0.07~0.08；Kinematic viscosity at 40 DEG C is preferably 2.16mm2/ s~2.41mm2/ s, more preferably 2.2~
2.4mm2/ s, most preferably 2.3mm2/s.In the present invention, the biomass appearance is preferably colourless transparent liquid or faint yellow
Transparency liquid does not have unsaturated bond (ester bond and carbon-carbon double bond) in structure, therefore temperature resistance with higher and hydrolytic stability.
In the present invention, the biomass is a kind of green non-poisonous substance, belongs to alcohol ether major class, itself and decompose
Product afterwards has no stimulation to human body and environment, has good ecological security.Meanwhile biomass provided by the invention is also
Have the characteristics that good lubricity and intermiscibility, is able to satisfy the performance requirement of production biomass synthetic base drilling fluid base fluid.?
In the present invention, the biomass base fluid has the characteristics such as good lubricity, inhibition, can be used as biomass synthetic base drilling fluid
Basal liquid, and its biodegradability is good, environmentally friendly.
In the present invention, the preparation method of the biomass is preferred are as follows:
Under the effect of the catalyst, laruyl alcohol, alkyl reagent and alkali are reacted, obtains biomass.
The present invention is not particularly limited the charging sequence of material, can sequentially add with stirring, condensation and heating equipment
It is reacted in reaction kettle.
The present invention can be Material synthesis biomass by natural origin biomass decomposition product laruyl alcohol, make it have preferable
Biodegradability, it is environmentally friendly, belong to " green " functional product.
In the present invention, the alkyl reagent be preferably chloro-n-pentane, chloro n-hexane, chloro normal heptane or chloro just
Octane；In the present invention, the catalyst is preferably polyethylene glycol, more preferably polyethylene glycol 400 or polyethylene glycol；In this hair
In bright, the alkali is preferably sodium hydroxide or potassium hydroxide.In the present invention, the laruyl alcohol, alkyl reagent, alkali and catalyst
Molar ratio be preferably 1:(0.5~1.5): (0.5~1.5): (0.025~0.25), more preferably 1:(0.8~1.2): (0.8
~1.2): (0.05~0.2), most preferably 1:1:1:(0.1~0.15).
In the present invention, the reaction preferably carries out under conditions of closed；The reaction is preferably under stirring conditions
It carries out.In the present invention, the temperature of the reaction is preferably 100 DEG C~160 DEG C, more preferably 110~150 DEG C, most preferably
120~140 DEG C.In the present invention, the speed stirred in the reaction process is preferably 300rpm~500rpm, more preferably
350~450rpm, most preferably 400rpm.In the present invention, the time of the reaction is preferably 12h~for 24 hours, and more preferably 15
~20h.
The preparation method of biomass provided by the invention is efficient, easy, easy, and synthesis condition is mild, and synthesis technology is simple,
Generation without secondary pollution, the product of synthesis has excellent environmental protection characteristic, has a safety feature, is biological degradable, and its performance
The requirement of biomass synthetic base drilling fluid basal liquid can be met.
In the present invention, the organoclay is preferably prepared by sodium bentonite by alkyl quaternary ammonium salts modification, the alkane
The carbon atom number of based quaternary ammonium salt is preferably 12~30, and more preferably 15~25, most preferably 20.In the present invention, described organic
Soil is preferably drilling fluid organoclay HFGEL-120, can be bought and be obtained by Zhejiang Fenghong New Material Co., Ltd..
In the present invention, the CaCl2The mass concentration of aqueous solution is preferably 20~40%, and more preferably 25~35%,
Most preferably 30%；The present invention is using the CaCl within the scope of the mass concentration2Aqueous solution activity is conducive to close to stratum water activity
Stable system.
In the present invention, used emulsifier can maintain the emulsion stability of entire drilling fluid system, and keep preferable
Rheological property, the emulsifier have Formula II structure:
In Formula II:
R1For NH2—(CH2)a1- NH-, a1 are 2~10；
R2For-COO-(CH2)a2- COO-, a2 are 1~8；
R3For-NH-(CH2)a3- NH-, a3 are 2~10；
R4For CH3(CH2)a4- COO-, a4 are 10~13.
In the present invention, the preparation method of the emulsifier is preferred are as follows:
2,6 diamino-pyridines, binary acid, fatty acid and diamine are subjected to polycondensation reaction, obtain emulsifier；
The general formula of the diamine is NH2—(CH2)a1—NH2, a1=2,3,4,5,6,7,8,9 or 10；
The general formula of the binary acid is COOH-(CH2) a2-COOH, a2=1,2,3,4,5,6,7 or 8；
The general formula of the fatty acid is CH3(CH2) a4-COOH, a4=10,11,12 or 13.
In the present invention, described 2,6 diamino-pyridines, binary acid, diamine and fatty acid molar ratio be preferably 1:(1
~3): (1~3): (0.5~1.5), more preferably 1:(1.5~2.5): (1.5~2.5): (0.8~1.2), most preferably 1:
2:2:1.
In the present invention, the reaction temperature is preferably 140 DEG C~150 DEG C, more preferably 145 DEG C.In the present invention, excellent
Choosing carries out multiple polycondensation reaction, more preferably carries out 3 polycondensation reactions, the time of each polycondensation reaction is preferably 3~5h, more preferably
For 4h.In the present invention, it will be crushed under obtained polycondensation reaction room temperature, can be obtained powder emulsified dose.
In the present invention, the emulsifier is preferably oil base drilling fluid emulsifier PEMUL, can be by ancestral petroleum in middle petrochemical industry
Drilling engineering Institute for Research and Technology, Engineering Co., Ltd provides.
In the present invention, the wetting agent is preferably the biodegrade obtained by fats and oils processing waste material by purification and amination
Type wetting agent (FB-WOWET) is commercial product, and manufacturer is Fu Bang Science and Technology Ltd., Henan Province.In the present invention, institute
The wetting agent of use can make in system solid phase particles surface be changed into lipophilicity by hydrophily.
In the present invention, the fluid loss additive is preferably prepared by acrylic acid is chemically modified, more preferably acrylic acid
Modified low viscosity epoxy resin WSR-615 can be bought by Wuxi general petrochemical works and be obtained.In the present invention, used drop
Fluid loss agents can be reduced intrusion of the drilling fluid filtrate to the borehole wall, form good mud cake.
The present invention does not have special limitation to the type of the barite and source, using those skilled in the art's resin
Barite can be bought by market and be obtained.
In the present invention, the biomass base fluid and CaCl2The volume ratio of aqueous solution is preferably (60~90): (10~
40), more preferably (65~85): (15~35), most preferably (70~80): (20~30).In the present invention, with biomass-based
Liquid and CaCl2The total volume meter of the mixed liquor of the formation of aqueous solution, mass volume ratio of the organoclay in mixed liquor be preferably 3~
6g/mL, more preferably 4~5g/mL；Mass volume ratio of the emulsifier in mixed liquor is preferably 4~8g/mL, more preferably 5~
7g/mL, most preferably 6g/mL；Mass volume ratio of the wetting agent in mixed liquor is preferably 1~3g/mL, more preferably 1.5~
2.5g/mL, most preferably 2g/mL；Mass volume ratio of the fluid loss additive in mixed liquor is preferably 3~5g/mL, more preferably
3.5~4.5g/mL, most preferably 4g/mL；Mass volume ratio of the CaO in mixed liquor is preferably 2~3g/mL, more preferably
2.5g/mL；Mass volume ratio of the barite in mixed liquor is preferably 150~500g/mL, more preferably 200~400g/mL,
Most preferably 250~350g/mL.
The present invention provides the preparation methods of the biomass synthetic base drilling fluid described in above-mentioned technical proposal, comprising:
Biomass base fluid and organoclay are mixed, the first mixture is obtained；
First mixture and emulsifier are mixed, the second mixture is obtained；
By the second mixture and CaCl2Aqueous solution mixing, obtains third mixture；
Third mixture and CaO are mixed, the 4th mixture is obtained；
4th mixture and wetting agent are mixed, the 5th mixture is obtained；
5th mixture and fluid loss additive are mixed, the 6th mixture is obtained；
6th mixture and barite are mixed, biomass synthetic base drilling fluid is obtained.
In the present invention, the preparation method of the biomass synthetic base drilling fluid is preferred are as follows: is added in biomass base fluid
Required organoclay stirs in progress；Then the desired amount of emulsifier is added and carries out high-speed stirred；Then in the item of high-speed stirred
The CaCl of the desired amount of mass fraction is added under part2Aqueous solution carries out high-speed stirred；Then the desired amount of CaO is added and carries out height
Speed stirring；Then the desired amount of wetting agent is added and carries out high-speed stirred；Then the desired amount of fluid loss additive is added and carries out high-speed stirring
It mixes；Then the desired amount of barite is added, drilling fluid density is modulated into 1.2g/cm3~1.8g/cm3, high-speed stirred is carried out, finally
It is fitted into aging in ageing can, obtains biomass synthetic base drilling fluid.
The preparation method processing step of biomass synthetic base drilling fluid provided by the invention is simple, easily operated, using this
Kind particular step can first allow various inorganic agents to be sufficiently mixed dissolution in biomass base fluid, form stable emulsion；It is added
CaCl2Aqueous solution can be effectively reduced system activity, adjust the rheological property of drilling fluid, while have both the effect of cost declining；Add
Entering wetting agent can make in system solid phase particles surface be changed into lipophilicity by hydrophily, improve emulsion stability；Filtrate reducing is added
The filtrate reducing effect of drilling fluid is reinforced after agent, is conducive to reservoir protection.
Compared with prior art, raw material used in the biomass base fluid in the present invention are vegetable oil, and source is wide, green nothing
Poison can be prepared with palm oil, rapeseed oil, castor oil etc.；Biomass structure includes saturation long chain fatty groups and alkyl ether
Group is not belonging to alkane without unsaturated bond (ester bond and carbon-carbon double bond), has preferable inhibition, temperature resistance, hydrolysis-stable
Property and biodegradable；The biomass synthetic base drilling fluid formed by base fluid of this biomass is a kind of environmentally protective drilling well
Liquid system, the drilling cuttings of subsequent generation are not included in " National Hazard waste register ", therefore the processing and disposition of subsequent drilling cuttings are more traditional
Synthetic base drilling fluid is simple.
The present invention uses biomass base fluid, emulsifier and the wetting agent of special component, and both emulsifier and wetting agent have
It acts synergistically, in drilling fluid under the comprehensive function of various composition, makes it have good performance.Therefore, life provided by the invention
Substance synthetic base drilling fluid is raw materials used nontoxic, environmentally protective, in lubricity, stratum protection, high temperature rheology, high temperature and pressure
Filter loss, biodegradable etc. have good characteristic.
By biomass synthetic base drilling fluid provided by the invention, constant temperature rolls 16h under conditions of 150 DEG C, 60 after taking-up
It is tested in the environment of DEG C, test result shows biomass synthetic base drilling fluid prepared by the present invention in rheological property, suspension
Stability, filtration reduction have good effect in terms of squeezing the indexs such as lubricating coefficient.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the infrared spectrogram for the product that the embodiment of the present invention 1 is prepared.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Raw material used in following embodiment of the present invention is commercial goods, and organoclay used is by Zhejiang Feng Hong new material
Limited liability company's purchase obtains；Emulsifier is oil base drilling fluid emulsifier PEMUL, has Formula II structure, by middle petrochemical industry
Drilling engineering Institute for Research and Technology, ancestral petroleum Engineering Co., Ltd provides；Wetting agent is Biodegradable wetting agent (FB-WOWET),
It is bought and is obtained by Fu Bang Science and Technology Ltd., Henan Province；Fluid loss additive is acrylic acid modified low viscosity epoxy resin WSR-615, by
The purchase of Wuxi general petrochemical works obtains.
Embodiment 1
1mol laruyl alcohol, 0.5mol chloro-n-pentane, 0.5mol potassium hydroxide and 0.025mol polyethylene glycol 400 are catalyzed
Agent is added in the reaction kettle with stirring, condensation and heating device, is uniformly mixed, reacts under the conditions of 100 DEG C, 300rpm
For 24 hours, it is down to room temperature, obtains the biomass-based liquid product.
Infrared spectroscopy detection, testing result such as Fig. 1 are carried out to the biomass-based liquid product that the embodiment of the present invention 1 is prepared
Shown, Fig. 1 is the infrared spectrogram for the product that the embodiment of the present invention 1 is prepared, and as shown in Figure 1, prepared by the embodiment of the present invention 1
Obtained product is laruyl alcohol amyl ether, structural formula are as follows: CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH2-
CH2-O-CH2-CH2-CH2-CH2-CH3
Embodiment 2
1mol laruyl alcohol, 1.5mol chloro n-hexane, 1.5mol potassium hydroxide and 0.25mol Macrogol 600 are catalyzed
Agent is added in the reaction kettle with stirring, condensation and heating device, is uniformly mixed, reacts under the conditions of 120 DEG C, 500rpm
12h is down to room temperature, obtains the biomass-based liquid product.
It is detected according to the product that the embodiment of the present invention 2 is prepared in method described in embodiment 1, testing result
For, the product laurel hexyl ether that the embodiment of the present invention 2 is prepared, structure are as follows: CH3-CH2-CH2-CH2-CH2-CH2-CH2-CH2-
CH2-CH2-CH2-CH2-O-CH2-CH2-CH2-CH2-CH2-CH3
Embodiment 3
By 1mol laruyl alcohol, 1mol chloro normal heptane, 1.2mol sodium hydroxide and 0.15mol Macrogol 600 catalyst
It is added in the reaction kettle with stirring, condensation and heating device, is uniformly mixed, reacts 20h under the conditions of 140 DEG C, 400rpm,
It is down to room temperature, obtains the biomass-based liquid product.
It is detected according to the product that the embodiment of the present invention 3 is prepared in method described in embodiment 1, testing result
For the product that the embodiment of the present invention 3 is prepared is laurel heptyl ether, structure are as follows: CH3-CH2-CH2-CH2-CH2-CH2-CH2-
CH2-CH2-CH 2-CH2-CH2-O-CH2-CH2-CH2-CH2-CH2-CH2-CH3
Embodiment 4
By 1mol laruyl alcohol, 1.2mol n-octyl chloride, 1.4mol sodium hydroxide and 0.2mol Macrogol 600 catalyst
It is added in the reaction kettle with stirring, condensation and heating device, is uniformly mixed, is reacted for 24 hours under the conditions of 160 DEG C, 500rpm,
It is down to room temperature, obtains the biomass-based liquid product.
It is detected according to the product that the embodiment of the present invention 4 is prepared in method described in embodiment 1, testing result
For the product that the embodiment of the present invention 4 is prepared is laurel octyl ether, structure are as follows: CH3-CH2-CH2-CH2-CH2-CH2-CH2-
CH2-CH2-CH2-CH2-CH2-O-CH2-CH2-CH2-CH2-CH2-CH2-CH2-CH3
Embodiment 5
GB/T 16783.2-2012 " industrial gas oil drilling fluid on-the-spot test part 2: oil according to national standards
Base drilling fluid ", performance detection is carried out to the product that the embodiment of the present invention 1~4 is prepared.Testing result is as shown in table 1.
The properties of product that 1 Examples 1 to 4 of table is prepared
As can be seen from Table 1, compared with common 0# diesel oil, the kinematic viscosity of biomass base fluid of the present invention is more
It is low, and aromatic-free and sulphur.The kinematic viscosity of biomass base fluid is low to be conducive to improve rate of penetration, ensures drilling fluid at low temperature
Viscosity will not be too high so that rheological property variation is steady at different temperatures for drilling fluid.
Embodiment 6
Drilling fluid composition:
Biomass base fluid is laurel amyl ether (embodiment 1 is prepared): 90 parts (volume parts)
The CaCl that mass fraction is 20%2Solution: 10 parts (volume parts)
And it is based on biomass base fluid and CaCl2The total volume number (100 parts) of aqueous solution is following mass volume ratios
Each component:
Organoclay: 3g/mL
Emulsifier: 4g/mL
Wetting agent: 1g/mL
Fluid loss additive: 3g/mL
CaO:2g/mL
Barite: 150g/mL.
Drilling well liquid and preparation method thereof: the organoclay that the mass volume ratio is added in the laurel amyl ether of the volume parts is stirred
5min is mixed, the emulsifier high-speed stirred 5min of the mass volume ratio is then added；Then it is added under conditions of high-speed stirred
The CaCl of the mass volume ratio2Aqueous solution high-speed stirred 5min；Then the CaO high-speed stirred of the mass volume ratio is added
5min；Then the wetting agent high-speed stirred 5min of the mass volume ratio is added；Then the drop filter of the mass volume ratio is added
Lose agent high-speed stirred 5min；Drilling fluid density is modulated 1.2g/cm by the barite that the mass volume ratio is then added3, carry out
High-speed stirred 20min is fitted into ageing can in 150 DEG C of aging 16h, obtains biomass synthetic base drilling fluid.
Embodiment 7
Drilling fluid composition:
Biomass base fluid is laurel hexyl ether (embodiment 2 is prepared): 60 parts (volume parts)
The CaCl that mass fraction is 30%2Solution: 40 parts (volume parts)
And it is based on biomass base fluid and CaCl2The total volume number (100 parts) of aqueous solution is following mass volume ratios
Each component:
Organoclay: 6g/mL
Emulsifier: 8g/mL
Wetting agent: 3g/mL
Fluid loss additive: 5g/mL
CaO:3g/mL
Barite: 330g/mL
The preparation method of drilling fluid: the organoclay of the mass volume ratio is added in the laurel hexyl ether of the volume parts
5min is stirred, the emulsifier high-speed stirred 5min of the mass volume ratio is then added；Then add under conditions of high-speed stirred
Enter the CaCl of the mass volume ratio2Aqueous solution high-speed stirred 5min；Then the CaO high-speed stirred of the mass volume ratio is added
5min；Then the wetting agent high-speed stirred 5min of the mass volume ratio is added；Then the drop filter of the mass volume ratio is added
Lose agent high-speed stirred 5min；Drilling fluid density is modulated 1.6g/cm by the barite that the mass volume ratio is then added3, carry out
High-speed stirred 20min is fitted into ageing can in 150 DEG C of aging 16h, obtains biomass synthetic base drilling fluid.
Embodiment 8
Drilling fluid composition:
Biomass base fluid is laurel heptyl ether (embodiment 3 is prepared): 75 parts (volume parts)
The CaCl that mass fraction is 40%2Solution: 25 parts (volume parts)
And it is based on biomass base fluid and CaCl2The total volume number (100 parts) of aqueous solution is following mass volume ratios
Each component:
Organoclay: 5g/mL
Emulsifier: 6g/mL
Wetting agent: 2g/mL
Fluid loss additive: 4g/mL
CaO:3g/mL
Barite: 500g/mL.
The preparation method of drilling fluid: the organoclay of the mass volume ratio is added in the laurel heptyl ether of the volume parts
5min is stirred, the emulsifier high-speed stirred 5min of the mass volume ratio is then added；Then add under conditions of high-speed stirred
Enter the CaCl of the mass volume ratio2Aqueous solution high-speed stirred 5min；Then the CaO high-speed stirred of the mass volume ratio is added
5min；Then the wetting agent high-speed stirred 5min of the mass volume ratio is added；Then the drop filter of the mass volume ratio is added
Lose agent high-speed stirred 5min；Drilling fluid density is modulated 1.8g/cm by the barite that the mass volume ratio is then added3, carry out
High-speed stirred 20min is fitted into ageing can in 150 DEG C of aging 16h, obtains biomass synthetic base drilling fluid.
Embodiment 9
Drilling fluid composition:
Biomass base fluid is laurel octyl ether (embodiment 4 is prepared): 80 parts (volume parts)
The CaCl that mass fraction is 40%2Solution: 20 parts (volume parts)
And it is based on biomass base fluid and CaCl2The total volume fraction (100 parts) of aqueous solution is following mass volume ratios
Each component:
Organoclay: 4g/mL
Emulsifier: 6g/mL
Wetting agent: 2g/mL
Fluid loss additive: 5g/mL
CaO:3g/mL
Barite: 500g/mL.
The preparation method of drilling fluid: the organoclay of the mass volume ratio is added in the laurel octyl ether of the volume parts
5min is stirred, the emulsifier high-speed stirred 5min of the mass volume ratio is then added；Then add under conditions of high-speed stirred
Enter the CaCl of the mass volume ratio2Aqueous solution high-speed stirred 5min；Then the CaO high-speed stirred of the mass volume ratio is added
5min；Then the wetting agent high-speed stirred 5min of the mass volume ratio is added；Then the drop filter of the mass volume ratio is added
Lose agent high-speed stirred 5min；Drilling fluid density is modulated 1.8g/cm by the barite that the mass volume ratio is then added3, carry out
High-speed stirred 20min is fitted into ageing can in 150 DEG C of aging 16h, obtains biomass synthetic base drilling fluid.
Comparative example 1
Drilling fluid is prepared according to method described in embodiment 8, as different from Example 8, does not add emulsifier, adds
Add the wetting agent of 8g/mL.
Comparative example 2
Drilling fluid is prepared according to method described in embodiment 8, as different from Example 8, does not add wetting agent, adds
Add the emulsifier of 8g/mL.
Embodiment 10
GB/T 16783.2-2012 " industrial gas oil drilling fluid on-the-spot test part 2: oil according to national standards
Base drilling fluid " method, the drilling fluid that embodiment 6~10 and comparative example 1~2 are prepared detects respectively, detects
As a result referring to table 2.
The performance test results of 2 embodiment of table and the drilling fluid of comparative example preparation
Note: ρ is density；AV is apparent viscosity；PV is plastic viscosity；YP is yield value.
It as shown in Table 2, is 150 in temperature using biomass synthetic base drilling fluid provided by the invention in service performance
DEG C, density 1.2g/cm3~1.8g/cm3In range, apparent viscosity is less than 45mPas, and filter loss is less than 0.5mL；Show this
It is small with good rheological characteristic, filter loss to invent the biomass synthetic base drilling fluid, performance is stablized after high temperature, can satisfy and surveys
Visit the needs of exploitation.It is by the data comparison of embodiment 8 and comparative example 1 and comparative example 2 it is found that employed in the present invention specific
The emulsifier and wetting agent of ingredient have synergistic effect, and drilling fluid can be made to have better performance.
In addition, using acute oral toxicity method in Ministry of Public Health's " disinfection technology standard " (version in 2002), the detection present invention
The bio-toxicity of the biomass synthetic base drilling fluid of offer, LD are greater than 5000mg/kg, show that the drilling fluid is nontoxic, green ring
It protects.
As seen from the above embodiment, the present invention provides a kind of biomass synthetic base drilling fluid and preparation method thereof, belong to
Petroleum gas environment-friendly type synthetic base drilling fluid Extended Technology field.The present invention provides a kind of biomass synthetic base drilling fluid,
It include: biomass base fluid；CaCl2Aqueous solution；Organoclay；Emulsifier；Wetting agent；Fluid loss additive；CaO；Barite.In the present invention
Biomass base fluid, emulsifier and wetting agent have synergistic effect, in drilling fluid under the comprehensive function of various composition, make the present invention
The biomass synthetic base drilling fluid better performances of offer, and it is raw materials used it is environmentally protective, price is lower, biological degradability is good,
It is a kind of novel green syt base drilling fluid.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of biomass synthetic base drilling fluid, comprising:
Biomass base fluid, the biomass have Formulas I structure:
In Formulas I, R is selected from amyl, hexyl, heptyl or octyl；
CaCl2Aqueous solution；
Organoclay；
Emulsifier, the emulsifier have structure shown in Formula II:
In Formula II:
R1For NH2—(CH2)a1- NH-, a1 are 2~10；
R2For-COO-(CH2)a2- COO-, a2 are 1~8；
R3For-NH-(CH2)a3- NH-, a3 are 2~10；
R4For CH3(CH2)a4- COO-, a4 are 10~13；
Wetting agent；
Fluid loss additive；
CaO；
Barite.
2. biomass synthetic base drilling fluid according to claim 1, which is characterized in that the biomass base fluid and CaCl2Water
The volume ratio of solution is (60~90): (10~40)；
The CaCl2The mass concentration of aqueous solution is 20%~40%.
3. biomass synthetic base drilling fluid according to claim 1, which is characterized in that with biomass base fluid and CaCl2It is water-soluble
The total volume meter for the mixed liquor that liquid is formed,
Mass volume ratio of the organoclay in mixed liquor is 3~6g/mL；
Mass volume ratio of the emulsifier in mixed liquor is 4~8g/mL；
Mass volume ratio of the wetting agent in mixed liquor is 1~3g/mL；
Mass volume ratio of the fluid loss additive in mixed liquor is 3~5g/mL；
Mass volume ratio of the CaO in mixed liquor is 2~3g/mL；
Mass volume ratio of the barite in mixed liquor is 150~500g/mL.
4. biomass synthetic base drilling fluid according to claim 1, which is characterized in that the organoclay is passed through by sodium bentonite
Alkyl quaternary ammonium salts modification is crossed to be prepared；
The carbon atom number of the alkyl quaternary ammonium salts is 12~30.
5. biomass synthetic base drilling fluid according to claim 1, which is characterized in that the wetting agent is given up by fats and oils processing
Material is prepared by purification and amination.
6. biomass synthetic base drilling fluid according to claim 1, which is characterized in that the fluid loss additive is passed through by acrylic acid
Chemical modification is prepared.
7. a kind of preparation method of biomass synthetic base drilling fluid described in claim 1, comprising:
Biomass base fluid and organoclay are mixed, the first mixture is obtained；
First mixture and emulsifier are mixed, the second mixture is obtained；
By the second mixture and CaCl2Aqueous solution mixing, obtains third mixture；
Third mixture and CaO are mixed, the 4th mixture is obtained；
4th mixture and wetting agent are mixed, the 5th mixture is obtained；
5th mixture and fluid loss additive are mixed, the 6th mixture is obtained；
6th mixture and barite are mixed, biomass synthetic base drilling fluid is obtained.
8. the method according to the description of claim 7 is characterized in that the biomass the preparation method comprises the following steps:
Under the action of catalyst, laruyl alcohol, alkyl reagent and alkali are reacted, obtains biomass；
The alkyl reagent is selected from chloro-n-pentane, chloro n-hexane, chloro normal heptane or n-octyl chloride.
9. according to the method described in claim 8, it is characterized in that, the catalyst is polyethylene glycol；
The laruyl alcohol, alkyl reagent, alkali and catalyst molar ratio be 1:(0.5~1.5): (0.5~1.5): (0.025~
0.25)。
10. the method according to the description of claim 7 is characterized in that the emulsifier the preparation method comprises the following steps:
2,6 diamino-pyridines, binary acid, fatty acid and diamine are subjected to polycondensation reaction, obtain emulsifier.
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