CN105950124B - A kind of diluent of oil base drilling fluid and its preparation method and application - Google Patents
A kind of diluent of oil base drilling fluid and its preparation method and application Download PDFInfo
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- CN105950124B CN105950124B CN201610301358.7A CN201610301358A CN105950124B CN 105950124 B CN105950124 B CN 105950124B CN 201610301358 A CN201610301358 A CN 201610301358A CN 105950124 B CN105950124 B CN 105950124B
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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
- 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
- C09K8/36—Water-in-oil emulsions
Abstract
The present invention provides a kind of diluents of oil base drilling fluid and preparation method thereof.The raw material components for preparing the diluent include the dodecyl benzene sulfonic acid of the aliphatic acid of 80 210 parts by weight, the diethanol amine of 30 50 parts by weight, the potassium hydroxide of 15 parts by weight and 15 45 parts by weight.The diluent of oil base drilling fluid of the present invention can have good compatibility between oil base, so as to be well dispersed in oil base drilling fluid, and then reduce the viscosity of oil base drilling fluid, and under the high temperature conditions, this diluent is also with good performance.The present invention also provides application of the above-mentioned diluent in high density oil base drilling fluid.The diluent can be effectively reduced the apparent viscosity, plastic viscosity and yield value of drilling fluid in high density oil base drilling fluid base slurry, therefore oil base drilling fluid recycling can be better achieved, and reduce oil base drilling fluid use cost.
Description
Technical field
The invention belongs to drilling technology fields, and in particular to a kind of diluent of oil base drilling fluid and preparation method thereof, with
And application of the diluent in high density oil base drilling fluid.
Background technology
With the development of petroleum industry, drilling well is more and more deeper, and bottom hole temperature (BHT) is higher and higher, therefore drilled strata pressure is also got over
Come bigger, at this moment just needs to control strata pressure using weighted drilling fluid.Barite is to use more universal exacerbation at present
Material all has certain thickening effect to drilling fluid system in this way, and it is 2.2g/cm especially to arrive drilling fluid density3When above, bore
Well liquid viscosity increases, and shear force becomes larger, and thixotropy is deteriorated, and be easy to cause pressure excitement, causes underground complex accident.And it is deep boring
When well, bottom hole temperature (BHT) is higher, and therefore, the diluent of this high density oil base drilling fluid is also required to have good high temperature resistant property,
In this way, being just conducive to improve rate of penetration and keeping wellbore stability.
For the oil base drilling fluid with high inhibition ability, the reason of leading to drilling fluid retrogradation be mainly due to：
The exacerbation of drilling fluid, bottom hole temperature (BHT) is excessively high to lead to inorganic agent unstability, underground salt contamination and solid invasion inferior etc.；Passing through a system
After the investigation of row, it has been found that high density drilling fluid can be needed when probing well or deep Bowl, but require drilling fluid to have again simultaneously
There is good rheological characteristic, prodigious difficulty can be brought to wellbore construction in this way.
Invention content
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of diluents of oil base drilling fluid；
The present invention also aims to provide the preparation method of above-mentioned diluent and the diluent to bore in high density oil base
Application in well liquid.
The purpose of the present invention is achieved by the following technical programs：
A kind of diluent of oil base drilling fluid, the raw material components for preparing the diluent include：
In above-mentioned diluent, it is preferable that the raw material components for preparing the diluent include：
In above-mentioned diluent, it is preferable that the raw material components for preparing the diluent include：
In above-mentioned diluent, it is preferable that the aliphatic acid is oleic acid.
In above-mentioned diluent, it is preferable that the effective content of aliphatic acid is more than 98%；Diethanol amine, dodecyl benzene sulfonic acid
Effective content be more than 99.5%；Potassium hydroxide is that analysis is pure.
The present invention also provides the preparation method of above-mentioned diluent, which includes the following steps：
Aliphatic acid, diethanol amine, potassium hydroxide are uniformly mixed by step 1, under conditions of vacuum degree is 0.02-0.06
It is stirred when vacuumizing, is gradually warming up to 140-160 DEG C, after reacting 2-4h, stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h,
Obtain amides compound；
Dodecyl benzene sulfonic acid is added into above-mentioned amides compound in step 2, continues to take out under the conditions of 140-160 DEG C
It is stirred under vacuum reaction 2-5h, reaction terminating obtains the diluent of oil base drilling fluid；
Preferably, mixing speed is 3000-4000r/min in the step 1 and step 2.
The present invention also provides application of the above-mentioned diluent in high density oil base drilling fluid.The application includes following step
Suddenly：The diluent is injected into according to the 0.5%-4% of high density oil base drilling fluid volume in high density oil base drilling fluid,
20-30min is stirred under the rotating speed of 8000-11000r/min.
In above-mentioned application, it is preferable that the high density oil base drilling fluid is diesel oil Water-In-Oil drilling fluid or white oil oil packet
Aqueous drilling fluid.
In above-mentioned application, it is preferable that the volume ratio of diesel oil and water is 70 in the diesel oil Water-In-Oil drilling fluid:30-95:
5。
In above-mentioned application, it is preferable that the volume ratio of white oil and water is 70 in the white oil Water-In-Oil drilling fluid:30-95:
5。
In above-mentioned diluent, it is used for adjusting the pH-value of diluent using dodecyl benzene sulfonic acid, and reduces product
Amine value makes amine value be distributed in 45-65mmol/g, since amidation process can be same with esterification in preparation process for this diluent
Shi Fasheng, it is therefore desirable to control amine value in a zone of reasonableness；And dodecyl benzene sulfonic acid can form calcium soap in drilling fluid,
So that it is preferably dispersed in suspension among drilling fluid, and increase dodecane value in the product, there is the emulsification of better high temperature
Performance.
In the preparation method of above-mentioned diluent, potassium hydroxide is rather than the acid-base modifier as catalyst；The mistake of preparation
Cheng Caiyong is vacuumized so that the product purity higher of preparation.
In the preparation method of above-mentioned diluent, since the acidity of dodecyl benzene sulfonic acid is greater than the acidity of oleic acid,
Dodecyl benzene sulfonic acid is added to adjust diluent acid value and amine value, enhances the stability and high temperature resistant property of diluent；Moreover,
Be added calcium that dodecyl benzene sulfonic acid again can be free after being added to high density oil base drilling fluid in product and in drilling fluid from
Son forms calcium soap, and calcium soap has very strong dispersion suspending power, to improve the stability of drilling fluid；Dodecyl benzene sulfonic acid
Presence make reaction process temperature relatively low, by-product production quantity is less, in preparation process can it is effective energy saving and
It is safer.
The diluent that above-mentioned preparation method is prepared also can normally play dilution properties under 220 DEG C of high temperature, this is dilute
Agent is released for high density (density 2.0g/cm3More than) in oil base drilling fluid, it can effectively reduce high density oil base drilling fluid
Viscosity, to the dilution rate of high density oil base drilling fluid up to 50% or more, oil base drilling fluid can be better achieved in significant effect
Recycling reduces oil base drilling fluid use cost.
Beneficial effects of the present invention：
Diluent provided by the invention can have good compatibility between oil base, so as to be well dispersed in oil base
In drilling fluid, and then the viscosity of oil base drilling fluid is reduced, and under the high temperature conditions, this diluent is also with good performance；
And it can be effectively reduced the apparent viscosity, plastic viscosity, yield value of high density oil base drilling fluid, and rheological property is improved,
Therefore the control to high density oil base drilling fluid rheological characteristic can be better achieved, reduced down hole problem.
Specific implementation mode
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but should not be understood as to the present invention can practical range restriction.The embodiment of the present invention is used
To chemical reagent be purchased from Ao Li chemical reagents corporations.
Embodiment 1
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) weigh the oleic acid of 90g, the diethanol amine of 42g, 1g potassium hydroxide be added in three-necked flask, in vacuum degree
To be stirred under conditions of 0.02-0.06 when vacuumizing, rotating speed 3000r/min is gradually warming up to 150 DEG C, after reacting 2-4h,
Stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 16.9g is added into the three-necked flask of above-mentioned amides compound, in 150 DEG C of items
Continue to vacuumize under part and be stirred to react 2h, rotating speed 3000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
Embodiment 2
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) weigh the oleic acid of 202g, the diethanol amine of 42g, 1g potassium hydroxide be added in three-necked flask, in vacuum degree
To be stirred under conditions of 0.02-0.06 when vacuumizing, rotating speed 4000r/min is gradually warming up to 150 DEG C, after reacting 2-4h,
Stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 16.9g is added into the three-necked flask of above-mentioned amides compound, in 150 DEG C of items
Continue to vacuumize under part and be stirred to react 4h, rotating speed 4000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
Embodiment 3
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) weigh the oleic acid of 202g, the diethanol amine of 42g, 1g potassium hydroxide be added in three-necked flask, in vacuum degree
To be stirred under conditions of 0.02-0.06 when vacuumizing, rotating speed 3000r/min is gradually warming up to 150 DEG C, after reacting 2-4h,
Stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 23.35g is added into the three-necked flask of above-mentioned amides compound, in 160 DEG C of items
Continue to vacuumize under part and be stirred to react 5h, rotating speed 3000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
Embodiment 4
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) weigh the oleic acid of 90g, the diethanol amine of 50.2g, 1g potassium hydroxide be added in three-necked flask, in vacuum
Degree stirs under conditions of being 0.02-0.06 when vacuumizing, and rotating speed 3000r/min is gradually warming up to 150 DEG C, reacts 2-4h
Afterwards, stop vacuumizing and stirring, and keep the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 20.8g is added into the three-necked flask of above-mentioned amides compound, in 150 DEG C of items
Continue to vacuumize under part and be stirred to react 2h, rotating speed 3000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
Embodiment 5
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) weigh the oleic acid of 90g, the diethanol amine of 46g, 1g potassium hydroxide be added in three-necked flask, in vacuum degree
To be stirred under conditions of 0.02-0.06 when vacuumizing, rotating speed 4000r/min is gradually warming up to 150 DEG C, after reacting 2-4h,
Stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 26g is added into the three-necked flask of above-mentioned amides compound, in 150 DEG C of conditions
Under continue to vacuumize and be stirred to react 4h, rotating speed 4000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
Embodiment 6
A kind of diluent of oil base drilling fluid is present embodiments provided, the raw material components for preparing the diluent include：
The present embodiment additionally provides the preparation method of above-mentioned diluent, which includes the following steps：
(1) it weighs the oleic acid of 90g, the diethanol amine of 40.2g, 1g potassium hydroxide to be added in three-necked flask, in vacuum degree
To be stirred under conditions of 0.02-0.06 when vacuumizing, rotating speed 3000r/min is gradually warming up to 140 DEG C, after reacting 2-4h,
Stopping is vacuumized and is stirred, and keeps the temperature 1.5-2h, to obtain amides compound；
(2) dodecyl benzene sulfonic acid of 26g is added into the three-necked flask of above-mentioned amides compound, in 160 DEG C of conditions
Under continue to vacuumize and be stirred to react 2h, rotating speed 3000r/min, reaction terminating obtains the diluent of oil base drilling fluid.
The present embodiment additionally provides application of the above-mentioned diluent in high density oil base drilling fluid, includes the following steps：
The above-mentioned diluent being prepared is injected into high density oil base drilling well according to the 0.5%-4% of high density oil base drilling fluid volume
In liquid, 20-30min is stirred under the rotating speed of 11000r/min.
The performance comparison of the diluent of 7 drilling fluid of embodiment is tested
The present embodiment is tested for the property to the diluent of the embodiment 1-6 drilling fluids provided：
1, test object：
Blank sample：Diesel oil 255mL+20% calcium chloride solution 45mL+6g organoclay+12g oxidized asphalt+15g calcium oxide, most
Barite is added afterwards and adjusts density to 2.2g/cm3, obtain drilling fluid；
Control sample 1-6：Control sample 1-6 is respectively to be added respectively by 1-6 of the embodiment of the present invention in above-mentioned blank sample drilling fluid
The diluent of offer, the diluent effective content are the 2% of the drilling fluid volume.
2, test method：
(1) rheology testing：
After twenty minutes by the blank sample of above-mentioned test object and control sample 1-6 high-speed stirreds, its rheological property is surveyed at 50 DEG C
(apparent viscosity, plastic viscosity and yield value) and emulsion-breaking voltage (ES).Not plus the reading of the 600r/min of the sample of diluent is remembered
AsThe reading that the 600r/min of the sample of diluent is added is denoted as
Then test object is fitted into ageing can heat rolling 16 hours at 180 DEG C, is cooled to room temperature, moves into agitator tank
High-speed stirred surveys its rheological property and emulsion-breaking voltage (ES) at 10 minutes, 50 DEG C
Wherein, the computational methods of dilution rate are as follows：
Rheological property, emulsion-breaking voltage are measured according to method specified in national standard GB/T16783.1-2006.Test result is such as
Table 1：
Table 1
According to the experiment contrast with blank sample, it can be observed how after this diluent is added, diluent is compound with primary emulsion
It acting on, interacting between different emulsifier molecules forms close heap composite membrane, and composite membrane is more solid than single film, intensity bigger,
Interfacial free energy is reduced, solid phase is not easy to assemble automatically, and emulsifying effectiveness is much better than single emulsifier.Emulsion-breaking voltage obviously carries
The emulsifiability of height, high-temperature high-density oil base drilling fluid system is remarkably reinforced.In the normal use for not influencing this drilling fluid system
In the case of, so that apparent viscosity is substantially reduced with moulding viscosity, improves the rheological property of system.
From 1 experimental data of table：It is viscous using the apparent viscosity of the sample of diluent provided in an embodiment of the present invention, plasticity
Degree and yield value are substantially better than the sample without using diluent, especially with the diluent that embodiment 1 and embodiment 2 provide,
Apparent viscosity, plastic viscosity and the yield value best performance of its sample.
In conclusion diluent provided by the invention can have good compatibility between oil base, so as to well
It is dispersed in oil base drilling fluid, and then reduces the viscosity of oil base drilling fluid, and under the high temperature conditions, this diluent also has good
Good performance；And it can be effectively reduced the apparent viscosity, plastic viscosity, yield value of high density oil base drilling fluid, and improve
Rheological property, therefore the control to high density oil base drilling fluid rheological characteristic can be better achieved, reduce down hole problem hair
It is raw.
Claims (10)
1. a kind of diluent of oil base drilling fluid, which is characterized in that the raw material components for preparing the diluent include：
Wherein：The aliphatic acid is oleic acid；
The preparation method of the diluent includes the following steps：
Aliphatic acid, diethanol amine, potassium hydroxide are uniformly mixed by step 1, and side is taken out under conditions of vacuum degree is 0.02-0.06
Vacuum side is stirred, and is gradually warming up to 140-160 DEG C, and after reacting 2-4h, stopping is vacuumized and stirred, and keeps the temperature 1.5-2h, is obtained
Amides compound；
Dodecyl benzene sulfonic acid is added into above-mentioned amides compound in step 2, continues to vacuumize under the conditions of 140-160 DEG C
It is stirred to react 2-5h, reaction terminating obtains the diluent of oil base drilling fluid.
2. diluent according to claim 1, which is characterized in that the raw material components for preparing the diluent include：
3. diluent according to claim 1, which is characterized in that the raw material components for preparing the diluent include：
4. the preparation method of diluent described in claim 1-3 any one, which is characterized in that the preparation method includes following step
Suddenly：
Aliphatic acid, diethanol amine, potassium hydroxide are uniformly mixed by step 1, and side is taken out under conditions of vacuum degree is 0.02-0.06
Vacuum side is stirred, and is gradually warming up to 140-160 DEG C, and after reacting 2-4h, stopping is vacuumized and stirred, and keeps the temperature 1.5-2h, is obtained
Amides compound；
Dodecyl benzene sulfonic acid is added into above-mentioned amides compound in step 2, continues to vacuumize under the conditions of 140-160 DEG C
It is stirred to react 2-5h, reaction terminating obtains the diluent of oil base drilling fluid.
5. preparation method according to claim 4, which is characterized in that mixing speed is in the step 1 and step 2
3000-4000r/min。
6. application of the diluent described in claim 1-3 any one in high density oil base drilling fluid.
7. application according to claim 6, which is characterized in that the application includes the following steps：The diluent is pressed
It is injected into high density oil base drilling fluid according to the 0.5%-4% of high density oil base drilling fluid volume, 8000-11000r/min's
20-30min is stirred under rotating speed.
8. application according to claim 7, it is characterised in that：The high density oil base drilling fluid is diesel oil Water-In-Oil drilling well
Liquid or white oil Water-In-Oil drilling fluid.
9. application according to claim 8, it is characterised in that：The volume of diesel oil and water in the diesel oil Water-In-Oil drilling fluid
Than being 70:30-95:5.
10. application according to claim 8, it is characterised in that：The body of white oil and water in the white oil Water-In-Oil drilling fluid
Product is than being 70:30-95:5.
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| CN110591666A (en) * | 2019-09-28 | 2019-12-20 | 重庆威能钻井助剂有限公司 | Diluent and preparation method and application thereof |
| CN110564379A (en) * | 2019-09-28 | 2019-12-13 | 中国石油集团川庆钻探工程有限公司钻井液技术服务公司 | Drilling fluid diluent and preparation method thereof |
| CN113969155A (en) * | 2020-07-22 | 2022-01-25 | 中国石油化工股份有限公司 | Emulsified cleaning agent, preparation method and application |
| CN115926763A (en) * | 2021-08-24 | 2023-04-07 | 中国石油天然气股份有限公司 | Viscosity reducer for oil-based drilling fluid and preparation method thereof |
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| US6194361B1 (en) * | 1998-05-14 | 2001-02-27 | Larry W. Gatlin | Lubricant composition |
| US20080318810A1 (en) * | 2004-07-20 | 2008-12-25 | Lamberti, S.P.A. | Self-Breakable Yield Point Enhancer for Oil Based Drilling Mud |
| CN101745340A (en) * | 2008-12-08 | 2010-06-23 | 中国石油天然气股份有限公司 | Cationic asphalt emulsifier and preparation method and application thereof |
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