CN109233762A - A kind of drilling fluid, preparation method and application - Google Patents
A kind of drilling fluid, preparation method and application Download PDFInfo
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- CN109233762A CN109233762A CN201710555207.9A CN201710555207A CN109233762A CN 109233762 A CN109233762 A CN 109233762A CN 201710555207 A CN201710555207 A CN 201710555207A CN 109233762 A CN109233762 A CN 109233762A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D233/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings
- C07D233/54—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members
- C07D233/56—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms
- C07D233/61—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, not condensed with other rings having two double bonds between ring members or between ring members and non-ring members with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, attached to ring carbon atoms with hydrocarbon radicals, substituted by nitrogen atoms not forming part of a nitro radical, attached to ring nitrogen atoms
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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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Abstract
The invention discloses a kind of drilling fluids, preparation method and application.Drilling fluid include: each component based on parts by weight, 100 parts by weight of water；0.5~5 parts by weight of shale control agent；The shale control agent is 1- amino-ethyl -3- methylimidazole salt, structural formula are as follows:Wherein R is Br, NO3、PF6Or BF4.Shale control agent in drilling fluid of the invention comprising can effectively inhibit shale hydration to disperse, when for drilling the big section mud shale stratum that borehole well instability easily occurs, it can effectively prevent the surface hydration of montmorillonite in mud shale, to play the role of reducing mud shale expansion pressure, wellbore stability is maintained.
Description
Technical field
The present invention relates to drilling applications, further say, are to be related to a kind of drilling fluid, preparation method and application.
Background technique
During oil/gas drilling, this global problem of mud shale stratum borehole well instability annoyings always vast petroleum work
Journey technical staff.Increase because well slough caused by borehole well instability, undergauge not only result in tight trip, bit freezing, torque, suppress pump etc.
Underground is complicated, or even will cause that drilling tool is fallen, well track deflection or whole mouth well are scrapped.
90% borehole well instability accident occurs in mud shale stratum in drilling process.Contain the water-sensitives such as montmorillonite in mud shale
Property clay mineral, when contacting with drilling fluid, Free water intrusion mud shale hole and microcrack in drilling fluid causes clay aquation
Expansion, the turgor pressure of generation can make the strength reduction of mud shale, so as to cause borehole well instability.Since not will cause clay swollen for oil
It is swollen, therefore in the past few decades, oil base drilling fluid always is the ideal chose for solving borehole wall mud shale destabilization problems.However
Increasingly strict with current environmental regulation, the use of oil base drilling fluid is restricted because of its serious damage to environment.Cause
This, the water-base drilling fluid with stronger shale inhibition has been increasingly becoming research hotspot.
As the core processing agent of strong rejection capability water-base drilling fluid, the research and development of shale control agent are always drilling fluid field
Research emphasis.The main reason for current most of viewpoints think mud shale borehole well instability is the aquation of clay, including surface hydration
With infiltration aquation.Studies have shown that can efficiently inhibit the inhibitor of montmorillonite surface hydration that need to have more than two amidos, hydrophobic
The features such as skeleton and relatively long strand, main purpose are to make inhibitor molecules pass through cationic exchange interaction insertion to glue
Native interlamination region simultaneously fetters electronegative adjacent clay crystal layer by positively charged amido, while hydrophobic molecular skeleton effectively presses down
Hydrone processed is to the intrusion between crystal layer.Nearly ten years, the shale control agent with above-mentioned molecular structure and characteristic is at home
Extensive research and application have been obtained outside.6,484,821 B1 of US describes the water base brill of inhibition for drilling mud shale stratum
Well liquid.It preferably comprises aqueous based continuous phase, heavy weight additive and formula H2N-R-{OR'}xThe polyether amine shale control agent of-Y, wherein R and
R' is respectively the alkylidene with 1-6 carbon atom, and x corresponds to the value of about 1 to about 25.Y group should be amine or alkoxy, excellent
Select primary amine or methoxyl group.WO2008/031806 A1 describes C4-10In dicarboxylic acids and alkanolamine, diamines or polyalkylene amine
Property or salt condensation product are as shale control agent.2007/0207932 A1 of US describes 1,2- cyclohexanediamine and its salt conduct
The application of drilling fluid shale control agent.
The shale control agent of the prior art has following defect:
(1) shale control agent of the prior art includes micromolecular inhibitor and high molecular polymer inhibitor.Small molecule suppression
Preparation is mainly to pass through to be embedded in montmorillonite crystal layer with nitrogen-atoms positively charged after protonation, acts on constraint phase by electrostatic attraction
Adjacent electronegative montmorillonite crystal layer.But most micromolecular inhibitor such as epoxypropyltrimethylchloride chlorides, dimethyl two
Allyl ammonium chloride, due to containing only a protonated nitrogen-atoms in individual molecule, electrostatic constraint effect is limited.1-
Imidazole nitrogen atom and amino in amino-ethyl -3- methylimidazole salt protonation reaction can occur under partial neutral environment and
It is positively charged, therefore individual molecule positive charge density is high, so as to preferably fetter electronegative montmorillonite crystal layer.And it is hydrophobic
Five-membered ring structure can effectively prevent hydrone to the intrusion between montmorillonite layer, so that high degree inhibits the surface water of montmorillonite
Change, maintains shale stability.
(2) high molecular polymerization species inhibitor due to molecular weight it is big, be easy to make bentonite in drilling fluid to generate serious wadding
It is solidifying, larger negative effect is caused to drilling fluid rheology and filter loss.
(3) almost all of inhibitor is all solid powdery at present.Situ of drilling well construction personnel is adding into drilling fluid
It is easy to suck these powder and damage own health when entering these solid powders.
Summary of the invention
In order to solve the problems, such as that the easy unstability of the mud shale borehole wall in the drilling process occurred in the prior art, the present invention provide one
Kind drilling fluid, preparation method and application.Shale in drilling fluid of the invention comprising can effectively inhibit shale hydration to disperse
Inhibitor can effectively prevent montmorillonite in mud shale when for drilling the big section mud shale stratum that borehole well instability easily occurs
Surface hydration, thus play the role of reduce mud shale expansion pressure, maintain wellbore stability.
An object of the present invention is to provide a kind of drilling fluid.
The drilling fluid includes:
Each component based on parts by weight,
100 parts by weight of water；
0.5~5 parts by weight of shale control agent；It is preferred that 1~3 parts by weight；
The shale control agent is 1- amino-ethyl -3- methylimidazole salt,
Its structural formula are as follows:
Wherein R is Br, NO3、PF6Or BF4, preferably Br and NO3；More preferably Br.
Contain the sensitive clays mineral such as montmorillonite, when contacting with drilling fluid, free water enchroachment (invasion) in drilling fluid in mud shale
Enter mud shale hole and microcrack, cause hydration and expansion of clay, the turgor pressure of generation can make the strength reduction of mud shale, thus easily
Borehole well instability occurs.Shale control agent provided by the invention is a kind of glyoxaline ion liquid of amino functional, the ionic liquid
Under partial neutral environment protonation reaction can occur for imidazole nitrogen atom and amino in body and positively charged, therefore positive charge
Density is high, and so as to preferably fetter electronegative montmorillonite crystal layer, amino functional glyoxaline ion liquid can pass through
Ion exchange is embedded between montmorillonite layer, and securely fetters phase by imidazole nitrogen atom and amino positively charged after protonation
Adjacent montmorillonite crystal layer, and hydrophobic five-membered ring structure can effectively prevent hydrone to the intrusion between montmorillonite layer, thus very big journey
Degree inhibits the surface hydration of montmorillonite, maintains shale stability.And at normal temperature due to 1- amino-ethyl -3- methylimidazole salt
For liquid, and vapour pressure is extremely low, therefore will not endanger the health of driller.
In the present invention, the bromide that can be 1- amine ethyl-3-methylimidazole of the shale control agent, nitrate, four
Borofluoride or hexafluorophosphate, preferably bromide or nitrate, more preferably bromide.
According to the present invention, the 1- amino-ethyl -3- methylimidazole salt can be according to document (Solubility of
carbon dioxide in amine-functionalized ionic liquids:Role of the anions,2012,
The preparation of method documented by 193-194:267-275).
According to the present invention, the drilling fluid is preferably water-base drilling fluid, i.e., as main matrix and adds various additions using water
Multiphase dispersion composed by agent.
The above-mentioned water-base drilling fluid containing shale control agent of the invention can also comprising well known to a person skilled in the art
One or more conventional use of additives, under preferable case, drilling fluid of the invention contain bentonite, tackifier, anti-sloughing agent,
One of fluid loss additive, lubricant, container horizon protective agent, heavy weight additive and pH adjusting agent are a variety of.
Drilling fluid preferably uses formula as below:
Wherein,
The bentonite refers to the clay using montmorillonite as main mineral constituent, has and assigns the viscous shear force of drilling fluid and filter
Lose the effect of wave making machine.It such as can be sodium bentonite and/or calcium-base bentonite, preferably sodium bentonite.Preferably, institute
Stating bentonitic dosage is 2-5 parts by weight, more preferably 3-4 parts by weight.
The tackifier can be improved drilling fluid and glue shear force.It such as can be xanthan gum, welan gum, polyacrylamide potassium
One of salt, polyanion cellulose and acrylamide and the copolymer of sodium acrylate are a variety of, preferably welan gum；It is preferred that
Ground, the dosage of the tackifier are 0.1-0.5 parts by weight, more preferably 0.2-0.3 parts by weight.
The anti-sloughing agent can assist shale control agent to prevent hole collapse, improve borehole wall stability.Such as can be
One of potassium humate, organosilicon, sulfonated gilsonite, polymeric alcohol are a variety of, preferably sulfonated gilsonite.Preferably, described anti-collapse
The dosage of agent is 1~5 parts by weight, more preferably 2~4 parts by weight.
The fluid loss additive can be improved wellbore liquid leaching loss wave making machine.It such as can be sulfonated-pheno-formoldehyde resin, sulphur methyl
One of walchowite, sulfonated-methyl brown coal and amphoteric ion polymer are a variety of, preferably sulfonated lignite resin and sulphonated phenol
The combination of urea formaldehyde.Preferably, the dosage of the fluid loss additive is 1-8 parts by weight, more preferably 4-6 parts by weight.
The lubricant can be improved drilling fluid lubricating performance.The undergrounds such as bit freezing complicated state is prevented, such as can be rouge
Fat acid polyol ester, fatty alcohol, phosphate and one of diesel oil and surfactant mixture are a variety of, preferably fatty acid
Polyol ester.Preferably, the dosage of the lubricant is 1-6 parts by weight, more preferably 2-4 parts by weight.
The container horizon protective agent can protect reservoir, and preventing drilling fluid and solid phase particles from invading reservoir causes reservoir to seep
Saturating rate, porosity reduce.It such as can be one kind or more of calcium carbonate superfine powder, uniaxial pressure shielding diverting agent, oil film diverting agent
One of kind combination is a variety of, preferably oil film diverting agent.Preferably, the content of the container horizon protective agent is 1~4 weight
Measure %, more preferably 2~3 weight %.
The heavy weight additive can be improved drilling fluid density with equilibrium strata pressure.It such as can be barite, Iron Ore Powder, four
One or more combinations of Mn 3 O, preferably barite.Preferably, the dosage of the heavy weight additive is 0~40 parts by weight, more
Preferably 10~20 parts by weight.
The pH adjusting agent can adjust drilling liquid pH value to alkalescent range.It such as can be sodium hydroxide, hydroxide
One or more combinations of potassium, lithium hydroxide, preferably potassium hydroxide.Preferably, the dosage of the pH adjusting agent is 0~0.5
Parts by weight, more preferably 0.1~0.3 parts by weight.
Above-mentioned additive can be commercially available product, can also be made according to the method for this field routine, which is not described herein again.
In drilling fluid of the invention, under preferable case, bentonitic content is 3~4 parts by weight.Preferably, shale presses down
The content of preparation is 1~3 parts by weight.Preferably, the content of tackifier is 0.2~0.3 parts by weight.Preferably, fluid loss additive
Content is 4~6 parts by weight.Preferably, the content of anti-sloughing agent is 2~4 parts by weight.Preferably, the content of lubricant is 2~4 weights
Measure part.Preferably, the content of container horizon protective agent is 2~3 parts by weight.Preferably, the content of heavy weight additive is 10~20 parts by weight.It is excellent
Selection of land, the content of pH adjusting agent are 0.1~0.3 parts by weight.
In a preferred embodiment of the invention, a kind of drilling fluid is provided, which contains 1~3
The shale control agent of parts by weight, the bentonite of 3~4 parts by weight, the welan gum of 0.2~0.3 parts by weight, 2~4 parts by weight
Sulfonated gilsonite, the sulfonated-methyl brown coal resin of 2~3 parts by weight, the sulfonated-pheno-formoldehyde resin of 2~4 parts by weight, the rouge of 2~4 parts by weight
Fat acid polyol ester, the calcium carbonate of 2~3 parts by weight, the barite of 10~20 parts by weight, the hydroxide of 0.1~0.3 parts by weight
Potassium.
The second object of the present invention is to provide the preparation method of drilling fluid described in one kind.
Include:
The drilling fluid is made after mixing by the dosage in the component.
The third object of the present invention is to provide application of the drilling fluid described in one kind in oil drilling.
Drilling fluid of the invention can be effectively prevent when for drilling the big section mud shale stratum that borehole well instability easily occurs
The surface hydration of montmorillonite in mud shale maintains wellbore stability to play the role of reducing mud shale expansion pressure.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
The preparation of 1- amino-ethyl -3- methylimidazole bromide:
The four-hole boiling flask for being equipped with blender, nitrogen conduit, thermometer and condenser pipe is placed in water bath with thermostatic control, to flask
Middle addition 1- methylimidazole (8.20g, 0.10mol), 2- bromine ethylamine hydrobromide (20.50g, 0.10mol) and 50mL acetonitrile, 80
DEG C stirring 4h after solution be layered, into mixture be added NaOH (4.0g, 0.10mol) neutralized, be filtered to remove NaBr
Precipitating, the upper solution containing residual reactant topple over removing, and lower layer's solution obtains wax-like production after being extracted with acetonitrile (5mL × 3)
Object 15.5g, shale control agent 1- amino-ethyl -3- methylimidazole bromide as of the invention.
Embodiment 1
1- amino-ethyl -3- methylimidazole bromide obtained in preparation example is dissolved in tap water, being configured to concentration is 1
The aqueous solution of weight %.Respectively choose 5 parts of 300mL 1 weight % 1- amino-ethyl -3- methylimidazole bromide aqueous solution into
The measurement of row inhibitory effect evaluation.
Comparative example 1
Using the tap water of 5 parts of 300mL as reference sample.
Comparative example 2
Using the method obtained aqueous solution of embodiment 1, the difference is that by small cation (2,3- epoxies
Ammonium chloride is purchased from Shandong Lu Yue Chemical Co., Ltd., same as below) shale control agent is dissolved in tap water.
Test case 1
The effect that test 1- amino-ethyl -3- methylimidazole bromide inhibits the dispersion of bentonite aquation is tested using bentonite pulping
Fruit.
Test method are as follows: 5 parts of 300mL concentration into embodiment 1 are the 1- amino-ethyl -3- methyl of 1 weight % respectively
The originally water sample and comparative example 2 that 5 parts of 300mL concentration in the aqueous sample and comparative example 1 of imidazoles bromide are 1 weight %
In 5 parts of 300mL concentration be 1 weight % small cation aqueous solution in sequentially add the sodium of 12g, 24g, 36g, 48g and 60g
Base bentonite (is purchased from Weifang Hua Wei bentonite limited liability company), and stirs 20min under 11000rpm revolving speed, then in height
Heat rolling 16h at 80 DEG C in warm roller furnace.After taking-up with six fast rotational viscometers (purchased from Qingdao with spring petroleum Instrument Ltd.,
The trade mark is ZNN-D6B) 600 turns of test systemWith 300 turnsReading measures slurries according to following formula
The test result of yield value value, the experiment of bentonite pulping is shown in Table 1,
Table 1
* " -- " is that can not calculate because dial reading exceeds maximum range.
As can be seen from the table, bentonite dynamic after pulping in 1- amino-ethyl -3- methylimidazole bromide aqueous solution cuts
Power is significantly less than in tap water and small cation aqueous solution, illustrates that shale control agent used in drilling fluid of the invention has
Excellent rejection can effectively inhibit bentonitic aquation to disperse.
Embodiment 2
Water-base drilling fluid: the water of 100 parts by weight, the sodium bentonite of 3 parts by weight, 0.2 weight is configured according to formula as below
The potassium hydroxide of part, the welan gum of 0.3 parts by weight, the sulfonated gilsonite of 3 parts by weight, the sulfonated phenol formaldehyde resin of 4 parts by weight, 2 weight
The sulfonated lignite resin of part, the pentaerythritol oleate of 2 parts by weight, the calcium carbonate of 3 parts by weight, the barite (sulphur of 10 parts by weight
Sour barium content is 93 weight %), and it is separately added into the shale control agent of the preparation example of 1 parts by weight, to obtain drilling fluid A1.
Embodiment 3
Water-base drilling fluid: the water of 100 parts by weight, the sodium bentonite of 3 parts by weight, 0.2 weight is configured according to formula as below
The potassium hydroxide of part, the welan gum of 0.3 parts by weight, the sulfonated gilsonite of 3 parts by weight, the sulfonated phenol formaldehyde resin of 4 parts by weight, 2 weight
The sulfonated lignite resin of part, the pentaerythritol oleate of 2 parts by weight, the calcium carbonate of 3 parts by weight, the barite (sulphur of 10 parts by weight
Sour barium content is 93 weight %), and it is separately added into the shale control agent of the preparation example of 2 parts by weight, surplus is water, to obtain
Drilling fluid A2.
Embodiment 4
Water-base drilling fluid: the water of 100 parts by weight, the sodium bentonite of 3 parts by weight, 0.2 weight is configured according to formula as below
The potassium hydroxide of part, the welan gum of 0.3 parts by weight, the sulfonated gilsonite of 3 parts by weight, the sulfonated phenol formaldehyde resin of 4 parts by weight, 2 weight
The sulfonated lignite resin of part, the pentaerythritol oleate of 2 parts by weight, the calcium carbonate of 3 parts by weight, the barite (sulphur of 10 parts by weight
Sour barium content is 93 weight %), and it is separately added into the shale control agent of the preparation example of 3 parts by weight, surplus is water, to obtain
Drilling fluid A3.
Embodiment 5
Water-base drilling fluid: the water of 100 parts by weight, the sodium bentonite of 2 parts by weight, 0.1 weight is configured according to formula as below
The welan gum of part, the sulfonated gilsonite of 1 parts by weight, the sulfonated phenol formaldehyde resin of 0.5 parts by weight, the sulfonated lignite resin of 0.5 parts by weight,
The pentaerythritol oleate of 1 parts by weight, the calcium carbonate of 1 parts by weight, (barium sulfate content is 93 weights to the barite of 10 parts by weight
Measure %), and it is separately added into the shale control agent of the preparation example of 0.5 parts by weight, to obtain drilling fluid A4.
Embodiment 6
Water-base drilling fluid: the water of 100 parts by weight, the sodium bentonite of 5 parts by weight, 0.5 weight is configured according to formula as below
The potassium hydroxide of part, the welan gum of 0.5 parts by weight, the sulfonated gilsonite of 5 parts by weight, the sulfonated phenol formaldehyde resin of 4 parts by weight, 4 weight
The sulfonated lignite resin of part, the pentaerythritol oleate of 6 parts by weight, the calcium carbonate of 4 parts by weight, the barite (sulphur of 20 parts by weight
Sour barium content is 93 weight %), and it is separately added into the shale control agent of the preparation example of 5 parts by weight, to obtain drilling fluid A5.
Comparative example 3-5
According to formula described in Application Example 2, the difference is that being separately added into the potassium chloride of 5 parts by weight, 1 parts by weight
Choline chloride or 1 parts by weight 2,3- epoxypropyltrimethylchloride chloride replace preparation example shale control agent, thus be made
Drilling fluid DA1-DA3.
Test case 2
Yield is rolled back according to GB/T 16783.1-2006 petroleum gas work to the heat of drilling fluid A1 and DA1-DA3 respectively
Industry drilling fluid on-the-spot test part 1: the method recorded in water-base drilling fluid is measured.
The roll back measurement method of yield of heat includes: respectively to take the above-mentioned drilling fluid of 350mL in high-temperature tank, then by the 6 of 50g~
The mud shale landwaste of 10 mesh is added thereto, and heat rolling 16h is carried out at 130 DEG C, is then crossed 40 meshes, and in tap water undershoot
2min or so is washed, sieve residue is placed on progress at 105 ± 3 DEG C, and drying to constant weight, then weighs and calculates hot rolling rate of recovery R=
The dry weight before quality/experiment after drying.The rate of recovery is bigger, then inorganic agent inhibition is stronger, otherwise inhibition is poorer.
Table 2
| Drilling fluid | Heat is rolled back yield/% |
| A1 | 71.2 |
| A2 | 82.5 |
| A3 | 85.7 |
| A4 | 59.5 |
| A5 | 94.5 |
| DA1 | 23.5 |
| DA2 | 45.7 |
| DA3 | 31.3 |
It can be seen that drilling fluid A1, A2, A3, A4, A5 using the shale control agent of the application by the data of table 2
Heat yield of rolling back is able to reach 71.2%, 82.5%, 85.7%, 59.5% and 94.5%, to show that the drilling fluid has
There is the excellent performance for inhibiting mud shale dispersion, maintaining wellbore stability.And not using the drilling fluid of the shale control agent of the application
The heat of DA1-DA3 yield of rolling back is only 23.5-45.7%, illustrates that performance is relatively poor in terms of shale inhibition.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
Claims (9)
1. a kind of drilling fluid, it is characterised in that the drilling fluid includes:
Each component based on parts by weight,
100 parts by weight of water；
0.5~5 parts by weight of shale control agent；
The shale control agent is 1- amino-ethyl -3- methylimidazole salt,
Its structural formula are as follows:
Wherein R is Br, NO3、PF6Or BF4。
2. drilling fluid as described in claim 1, it is characterised in that:
1~3 parts by weight of shale control agent.
3. drilling fluid as described in claim 1, it is characterised in that:
The R is Br and NO3。
4. drilling fluid as claimed in claim 3, it is characterised in that:
The R is Br.
5. drilling fluid as described in claim 1, it is characterised in that:
6. drilling fluid as claimed in claim 5, it is characterised in that:
7. drilling fluid as claimed in claim 5, it is characterised in that:
The bentonite is sodium bentonite and/or calcium-base bentonite；
The tackifier are xanthan gum, welan gum, polyacrylamide sylvite, polyanion cellulose, acrylamide and acrylic acid
One of copolymer of sodium or combination；
The anti-sloughing agent is one of potassium humate, organosilicon, sulfonated gilsonite or combination；
The fluid loss additive is one of sulfonated-pheno-formoldehyde resin, sulfonated-methyl brown coal resin, amphoteric ion polymer or combination；
The lubricant is sulfonation oil foot, diesel oil is mixed with surfactant mixture, fatty glyceride with surfactant
One of object or combination；
The container horizon protective agent is one or more combinations of calcium carbonate superfine powder, uniaxial pressure shielding diverting agent, oil film diverting agent；
The heavy weight additive is one or more combinations of barite, Iron Ore Powder, mangano-manganic oxide；
The pH adjusting agent is one or more combinations of sodium hydroxide, potassium hydroxide, lithium hydroxide.
8. a kind of preparation method of the drilling fluid as described in one of claim 1~7, it is characterised in that the described method includes:
The drilling fluid is made after mixing by the dosage in the component.
9. a kind of application of drilling fluid as described in one of claim 1~7 in oil drilling.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109824597A (en) * | 2019-01-30 | 2019-05-31 | 中国石油集团川庆钻探工程有限公司 | It is suitable for modification polyhistidyl of supermolecule shale control agent and preparation method thereof and the application in water-base drilling fluid |
| CN111662690A (en) * | 2020-07-09 | 2020-09-15 | 南京良友化工有限公司 | High-temperature-resistant tackifier for drilling fluid and production method thereof |
| CN111909667A (en) * | 2019-05-07 | 2020-11-10 | 中国石油天然气集团有限公司 | Shale early hydration inhibitor composition and drilling fluid |
| CN111978939A (en) * | 2020-09-16 | 2020-11-24 | 西南石油大学 | Polyion liquid used as surface hydration inhibitor and water-based drilling fluid system |
| US10889742B1 (en) | 2020-05-29 | 2021-01-12 | China University Of Petroleum (Beijing) | Modified polyhistidine suitable for being used as a supramolecular shale inhibitor, method of preparing the same and its application in water-based drilling fluids |
| CN116253877A (en) * | 2023-03-16 | 2023-06-13 | 中国石油大学(华东) | High-temperature-resistant low-viscosity hyperbranched polyion liquid inhibitor for water-based drilling fluid and preparation method and application thereof |
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| CN111978939A (en) * | 2020-09-16 | 2020-11-24 | 西南石油大学 | Polyion liquid used as surface hydration inhibitor and water-based drilling fluid system |
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| CN116253877B (en) * | 2023-03-16 | 2024-03-19 | 中国石油大学(华东) | High-temperature-resistant low-viscosity hyperbranched polyion liquid inhibitor for water-based drilling fluid and preparation method and application thereof |
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