CN109294530A - A kind of drilling fluid dilution stabilizer and preparation method thereof - Google Patents
A kind of drilling fluid dilution stabilizer and preparation method thereof Download PDFInfo
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- CN109294530A CN109294530A CN201811342517.3A CN201811342517A CN109294530A CN 109294530 A CN109294530 A CN 109294530A CN 201811342517 A CN201811342517 A CN 201811342517A CN 109294530 A CN109294530 A CN 109294530A
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- 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
- C09K8/03—Specific additives for general use in well-drilling compositions
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Abstract
The invention discloses a kind of drilling fluid dilution stabilizer and preparation method thereof, each component score proportion by weight is as follows: organic acid: 40-55 parts；Inorganic salts: 45-58 parts；Cosolvent: 2-5 parts；1-10 parts of pH adjusting agent；Water: surplus, above-mentioned raw materials hybrid reaction and obtained dilution stabilizer.Drilling fluid provided by the invention is a kind of environmental-friendly, efficient, multifunctional drilling fluid rheological property regulator with dilution stabilizer; competitive Adsorption can be generated with other polymers inorganic agent; and by dispersion, effective deflocculation and protective effect are played to clay particle.Therefore, drilling fluid viscosity can not only be effectively reduced in it, and can improve drilling fluids at high temperature stability, and product heatproof is up to 220 DEG C or more.The product and various drilling fluid system compatibilities are good, moreover it is possible to reduce high temperature and high pressure filter loss.Suitable for deep-well, ultradeep well, dosage 1.0%~3.0% is recommended in the flow pattern adjusting of high clay content, high solid phase drilling fluid system.
Description
Technical field
The present invention relates to a kind of drilling fluid dilution stabilizers and preparation method thereof, belong to deep-well, ultradeep well, high clay contains
The flow pattern regulation technology field of amount, high solid phase drilling fluid system.
Background technique
In recent years, as the research in China Petroleum and natural gas field deepens continuously exploration and development, drillng operation is gradually
It is developed from shallow layer stratum, simple stratum to deeper formation, complex stratigraphic drilling, deep-well, ultradeep well will be following exploration and open
Send out emphasis.In the drilling prospection operation gradually carried out to deeper formation, due to reservoir bury it is relatively deep, strata pressure becomes larger,
Lithology also becomes more complicated, these variations result in drilling operation performance difficulty and but low efficiency at high cost, is more easier to lead
Accident occurs for cause.
Currently, the drilling well of ultradeep well works other than the complex conditions for facing stratum, it is especially right there is also many problems
The technology etc. of drilling fluid rheology under the research of high temperature resistant drilling fluids system and its relevant treatment agent, control high density hot conditions
There are gaps with foreign countries for the research of aspect.Wherein thinner is indispensable additive for drilling fluid in drilling process, it is exchanged
Section drilling fluid rheology plays very important effect.Although solid control equipment can effectively clear the various solid phases in drilling fluid, rise
The effect for adjusting drilling fluid rheology, reducing thinner usage amount, but live solid control equipment running efficiency is not high now, using not
Ideal, the effect of thinner are also just more important.
High density drilling fluid is at the scene during construction operation, due to being polluted by landwaste, water flooding, sour gas etc.,
Performance is destroyed, and viscosity significantly increases；May also occur at high temperature, inorganic agent failure, clay micelle such as are destroyed at the feelings
Condition；With further increasing for drilling well difficulty and environmental requirement, there is an urgent need to study it is a kind of can be resistant to high temperatures and environment-friendly high-efficiency
Dilute stabilizer.
Summary of the invention
It is an object of the invention to overcome the deficiencies of existing technologies, a kind of drilling fluid dilution stabilizer and its preparation are provided
The dilution stabilizer of method, preparation can generate competitive Adsorption with other polymers inorganic agent, and by dispersion, to clay particle
Play effective deflocculation and protective effect, effective regulation system viscosity.
The technical solution adopted by the present invention is that:
A kind of drilling fluid dilution stabilizer, it is characterised in that include following components and parts by weight:
Organic acid: 40-55 parts；
Inorganic salts: 45-58 parts；
Cosolvent: 2-5 parts；
PH adjusting agent: 1-10 parts；
Water: surplus；
The organic acid is one or more of tartaric acid, oxalic acid, malic acid, citric acid；
The inorganic salts are the mixture of oxychloride hafnium or titanium oxychloride, or both；
The cosolvent is one or more of glycerine, ethylene glycol, ethyl alcohol；
The pH adjusting agent is one of organosilan, sodium carbonate, sodium bicarbonate, saleratus, potassium carbonate or more
Kind.
Further, the mass ratio of the organic acid and inorganic salts is 1:0.9 or 1:1.2.
A kind of preparation method of drilling fluid dilution stabilizer, it is characterised in that comprise the steps of:
A. the organic acid in the formula is stirred in a kettle with water, cosolvent and is mixed；
B. the inorganic salts in the formula are mixed with the obtained mixture of a step；
C. reaction 0.5-5h is carried out at 50-90 DEG C；
D. reaction terminates after being cooled to room temperature, and mixed solution pH is adjusted to 5-7 with pH adjusting agent, the brill can be obtained
Well liquid dilution stabilizer.
Further, the reaction temperature in the step c is 60 DEG C or 90 DEG C.
Further, the reaction time in the step c is 1h, 1.5h or 2h.
The beneficial effects of the present invention are:
1. drilling fluid prepared by the present invention dilution stabilizer, abbreviation HWThin-1, performance are as follows: appearance: it is colourless or
Light yellow liquid；Condensation point≤- 10 DEG C；Room temperature viscosity break ratio >=50%；200 DEG C of heat rolling 16h viscosity break ratio >=60%.
2. drilling fluid is a kind of environmental-friendly, efficient, multifunctional drilling fluid rheological property regulator, energy with dilution stabilizer
It is enough to generate competitive Adsorption with other polymers inorganic agent, and by dispersion, to clay particle play effective deflocculation with
Protective effect.Therefore, drilling fluid viscosity can not only be effectively reduced in it, and can improve drilling fluids at high temperature stability, and product is resistance to
Temperature is up to 220 DEG C or more.The product and various drilling fluid system compatibilities are good, moreover it is possible to reduce high temperature and high pressure filter loss.It is suitable for
Deep-well, ultradeep well, the flow pattern adjusting of high clay content, high solid phase drilling fluid system, recommend dosage 1.0%~3.0%.
Detailed description of the invention
Fig. 1 is in the present invention, and when base is starched and tested, feed ratio influences result curve figure to viscosity break ratio.
Fig. 2 is in the present invention, and when well is starched and tested, feed ratio influences result curve figure to viscosity break ratio.
Fig. 3 is in the present invention, and when base is starched and tested, the reaction time influences result curve figure to viscosity break ratio.
Fig. 4 is in the present invention, and when well is starched and tested, the reaction time influences result curve figure to viscosity break ratio.
Fig. 5 is in the present invention, and when base is starched and tested, reaction temperature influences result curve figure to viscosity break ratio.
Fig. 6 is in the present invention, and when well is starched and tested, reaction temperature influences result curve figure to viscosity break ratio.
Specific embodiment
It is right below in conjunction with attached drawing and example in order to be more clearly understood the advantages of making the purpose of the present invention and technical solution
The present invention is further elaborated.
A kind of drilling fluid dilution stabilizer, it is characterised in that include following components and parts by weight:
Organic acid: 40-55 parts；
Inorganic salts: 45-58 parts；
Cosolvent: 2-5 parts；
PH adjusting agent: 1-10 parts；
Water: surplus；
The organic acid is one or more of tartaric acid, oxalic acid, malic acid, citric acid；
The inorganic salts are the mixture of oxychloride hafnium or titanium oxychloride, or both；
The cosolvent is one or more of glycerine, ethylene glycol, ethyl alcohol；
The pH adjusting agent is one of organosilan, sodium carbonate, sodium bicarbonate, saleratus, potassium carbonate or more
Kind.
A kind of preparation method of drilling fluid dilution stabilizer, it is characterised in that comprise the steps of:
A. the organic acid in the formula is stirred in a kettle with water, cosolvent and is mixed；
B. the inorganic salts in the formula are mixed with the obtained mixture of a step；
C. reaction 0.5-5h is carried out at 50-90 DEG C；
D. reaction terminates after being cooled to room temperature, and mixed solution pH is adjusted to 5-7 with pH adjusting agent, the brill can be obtained
Well liquid dilution stabilizer.
Using the above method, principle is compared according to single factor test, and under the same test conditions with identical volume to preparation
Stabilizer test result is diluted as shown in attached drawing 1~6, wherein the factor compared is organic acid and the feed ratio of inorganic salts, reacts
Time and reaction temperature test 100 reduced rate of φ (also known as 100r reduced rate) and YP reduced rate (also known as yield value reduced rate).
When test, viscosity data is obtained using six fast rotational viscometers, six fast rotational viscometers should meet GB/T
The requirement of 6.3.1 in 16783.1-2014 standards.
When test, the preparation method of base slurry are as follows: stirred in cup in height and be separately added into 400mL distilled water, 2.40g Carbon Dioxide
Sodium, 40.0g sodium bentonite, high-speed stirred 20min, room temperature curing in airtight condition is for 24 hours.Base is taken to starch two parts, it is dilute that 6.0g is added in a copy of it
Release stabilizer, high-speed stirred 10min is surveyed with six fast rotational viscometers by method as defined in GB/T16783.1 at (50 ± 2) DEG C
Determine φ 600, φ 300 and 100 value of φ.Viscosity break ratio is calculated by formula (1):
In formula:
DI1--- room temperature viscosity break ratio, %；
φ10001--- base is starched φ 100 and is read；
φ1001--- sample-adding slurry φ 100 is read.
Yield value reduced rate is calculated by formula (2) again:
In formula:
YI1--- room temperature yield value reduced rate, %；
YP01--- the numerical value of base slurry yield value；
YP1--- the numerical value of sample-adding slurry yield value.
When test, in the test in well slurry referring to the test in base slurry.
At 70 DEG C, 2h is reacted, organic acid is different with inorganic salts feed ratio, and synthetic drilling fluid dilution stabilizer is surveyed
Test result is as shown shown in Figure 1 and Figure 2.It can be seen that by Fig. 1 and Fig. 2, organic acid and inorganic salts feed intake mass ratio as 1:1.2 synthesis
The viscosity reducing effect in base slurry of dilution stabilizer out is best, the dilution stabilizer that feed ratio 1:0.9 synthesizes viscosity reduction in well slurry
Effect is best.
At 70 DEG C, feed ratio 1:0.9, the reaction time is different, and synthetic drilling fluid dilution stabilizer, test result is such as
Shown in attached drawing 3 and attached drawing 4.It can be seen that by Fig. 3 and Fig. 4, the dilution stabilizer of reaction time 1h, 1.5h and 2h synthesis is starched in base
It is similar and best with the viscosity reducing effect in well slurry.
It is 1:0.9 in feed ratio, the reaction time, 2h was synthesized, and synthetic drilling fluid dilution stabilizer, test result is such as
Shown in attached drawing 5 and attached drawing 6.It can be seen that by Fig. 5 and Fig. 6, after comprehensive comparison, 90 DEG C of the reaction temperature dilution stabilizers synthesized exist
Viscosity reducing effect is best in base slurry, and followed by reaction temperature is 60 DEG C；60 DEG C of the reaction temperature dilution stabilizers synthesized are starched in well
Middle viscosity reducing effect is best.
Can be seen that by testing above, organic acid: inorganic salts feed ratio is 1:0.9, reaction time 2h, reaction temperature 60
DEG C, the viscosity reduction that the dilution stability synthesized plays the role of is best.Viscosity break ratio is minimum up to 70% in base slurry, in well slurry most
Low reachable 40%.
The working principle of dilution stabilizer in invention is to be based on:
High density drilling fluid is at the scene during construction operation, due to being polluted by landwaste, water flooding, sour gas etc.,
Performance is destroyed, and viscosity significantly increases；May also occur at high temperature, inorganic agent failure, clay micelle such as are destroyed at the feelings
Condition.Dilution stabilizer in the present invention is generated by organic acid and inorganic salt reaction, and molecular weight will not be too high, is added to drilling fluid
After interior, on the one hand, dilution stabilizer can be adsorbed on clay particle, break the reticular structure formed between clay particle.It is another
Aspect, dilution stabilizer grab the absorption position for the polymer being adsorbed on clay particle, break original polymer and glue
The reticular structure formed between soil particle.Furthermore dilution stabilizer reacts to be formed with the high molecular polymer in drilling fluid system
Stable complex compound has broken the netted knot for interacting and being formed between polymer so that high molecular polymer shrinks dehydration
Structure.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.Therefore, of the invention
Protection scope should be determined by the scope of protection defined in the claims.
Claims (5)
1. a kind of drilling fluid dilution stabilizer, it is characterised in that include following components and parts by weight:
Organic acid: 40-55 parts；
Inorganic salts: 45-58 parts；
Cosolvent: 2-5 parts；
PH adjusting agent: 1-10 parts；
Water: surplus；
The organic acid is one or more of tartaric acid, oxalic acid, malic acid, citric acid；
The inorganic salts are the mixture of oxychloride hafnium or titanium oxychloride, or both；
The cosolvent is one or more of glycerine, ethylene glycol, ethyl alcohol；
The pH adjusting agent is one or more of organosilan, sodium carbonate, sodium bicarbonate, saleratus, potassium carbonate.
2. a kind of drilling fluid according to claim 1 dilution stabilizer, it is characterised in that: the organic acid and inorganic salts
Mass ratio be 1:0.9 or 1:1.2.
3. the method for preparing drilling fluid dilution stabilizer as claimed in claim 1 or 2, it is characterised in that include following step
It is rapid:
A. the organic acid in the formula is stirred in a kettle with water, cosolvent and is mixed；
B. the inorganic salts in the formula are mixed with the obtained mixture of a step；
C. reaction 0.5-5h is carried out at 50-90 DEG C；
D. reaction terminates after being cooled to room temperature, and mixed solution pH is adjusted to 5-7 with pH adjusting agent, the drilling fluid can be obtained
With dilution stabilizer.
4. a kind of preparation method of drilling fluid dilution stabilizer according to claim 3, it is characterised in that: the step
Reaction temperature in c is 60 DEG C or 90 DEG C.
5. a kind of preparation method of drilling fluid dilution stabilizer according to claim 3 or 4, it is characterised in that: described
Reaction time in step c is 1h, 1.5h or 2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811342517.3A CN109294530B (en) | 2018-11-13 | 2018-11-13 | Dilution stabilizer for drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811342517.3A CN109294530B (en) | 2018-11-13 | 2018-11-13 | Dilution stabilizer for drilling fluid |
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| Publication Number | Publication Date |
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| CN109294530A true CN109294530A (en) | 2019-02-01 |
| CN109294530B CN109294530B (en) | 2020-10-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958315A (en) * | 2022-05-27 | 2022-08-30 | 北京宝沃石油技术有限责任公司 | High-temperature and high-pressure resistant water-based drilling fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958315A (en) * | 2022-05-27 | 2022-08-30 | 北京宝沃石油技术有限责任公司 | High-temperature and high-pressure resistant water-based drilling fluid |
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| CN109294530B (en) | 2020-10-09 |
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