CN105086959B - A kind of high inhibition water-base drilling fluid and its preparation method and application - Google Patents
A kind of high inhibition water-base drilling fluid and its preparation method and application Download PDFInfo
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Abstract
The present invention provides a kind of high inhibition water-base drilling fluid and its synthetic method and application, the drilling fluid includes water, amphoteric ion polymer, anhydrous calcium chloride, native phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is 0.5 5wt% of water consumption, anhydrous calcium chloride dosage is 20 70wt% of water consumption, and native phase dosage is 0 6wt% of water consumption, and flow pattern regulator dosage is 0.1 0.4wt% of water consumption.The present invention also provides a kind of water-based drilling solution synthesis and application.Drilling fluid of the present invention makes drilling fluid have excellent rheological property, vena caval filter performance, rejection, sealing characteristics, greasy property by the synergistic effect of calcium chloride and amphoteric ion polymer.
Description
Technical field
The present invention relates to a kind of drilling fluid, more particularly to a kind of drilling fluid containing amphoteric ion polymer.
Background technology
For shale gas stratum cranny development, water sensitivity is strong, leakage easily occurs, collapse, undergauge the features such as, in drilling process
Middle the problems such as solving wellbore stability, drop resistance antifriction, just becomes the most important thing of drilling fluid selection.Country's shale gas horizontal well at present
Mainly using oil base drilling fluid in drilling process, but the high cost of oil base drilling fluid, high pollution are its natural flaws.Water-base drilling fluid
It is very huge in the application prospect of shale gas horizontal well if can have breakthrough inhibiting, block, lubricate, take rock sand removal etc.
Greatly.At present, the water-base drilling fluid with larger application potential has glucose glycoside drilling fluid, polyamine class drilling fluid, polymerization
Alcohol drilling fluid, drilling workers and silicate drilling fluid etc..These drilling fluid systems also need to continue on the basis of existing
In-depth research, develops mating inorganic agent, meets the needs of shale gas development of resources, and can make drilling fluid system towards green
The direction of environmental protection is developed.
Chinese patent CN103146364A describes a kind of high inhibition water-base drilling fluid, it includes water, polyamine inhibitor, packet
It is suppressed agent, hydrate inhibitor, tackifier, fluid loss additive and fluid lubricant.Drilling fluid is with can effectively inhibiting deep water superficial part
Layer borehole well instability, inhibition are suitable with oil base drilling fluid.Shale rolling rate of recovery is not higher than 95%.Drilling fluid can solve deep water
The generation problem of hydrate, is applicable in the drillng operation of the 3000m depth of waters in drilling well.Chinese patent CN102250595A is public
The drilling fluid for strong retraction activated clay stratum has been opened, it is fine by bentonite, partially hydrolyzed polyacrylamide (PHPA), low adhesive aggregation anion
Tie up element, co-polymer of sulfonate tackifier, potassium chloride, polymeric alcohol, amine based polymer, fatty alcohol ether phosphate, water composition, the drilling well
Liquid rejection and greasy property are close to oil base drilling fluid.Chinese patent CN103013470A discloses a kind of for ultra-deep side
Drilling well mud stone high inhibition drilling fluid system, by bentonite slurry, alkaline conditioner, shale control agent, metal ion polymer, lignite
Resin, sulfonated phenol formaldehyde resin, cationic emulsified bitumen, lubricant, emulsifier, crude oil and calcium carbonate superfine powder, the drilling fluid
System is to mud shale strong inhibition capability, and shale recovery ratio is up to 90.33%, and high temperature resistance is up to 150 DEG C；The coefficient of friction resistance is distinguished before and after aging
Less than 0.1.
Invention content
In view of the deficiencies of the prior art, the present invention provides a kind of high inhibition water-base drilling fluid and its preparation method and application.
The synergistic effect that drilling fluid of the present invention passes through calcium chloride and amphoteric ion polymer so that drilling fluid has excellent rheological characteristic
Energy, vena caval filter performance, rejection, sealing characteristics, greasy property etc..
The present invention provides a kind of water-base drilling fluid, the drilling fluid include water, amphoteric ion polymer, anhydrous calcium chloride,
Native phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is the 0.5-5wt% of water consumption, excellent
It is selected as 1.5-3wt%；Anhydrous calcium chloride dosage is the 20-70wt%, preferably 30-60wt% of water consumption；Native phase dosage is water consumption
0-6wt%, preferably 1.5-4wt%, flow pattern regulator dosage are the 0.1-0.4wt%, preferably 0.2-0.3wt% of water consumption.
In water-base drilling fluid of the present invention, the soil is mutually sodium bentonite, in calcium-base bentonite, attapulgite, sepiolite
One or more.
In water-base drilling fluid of the present invention, the flow pattern regulator is xanthans, guar gum, one kind in welan gum or several
Kind.
In water-base drilling fluid of the present invention, heavy weight additive can also be included, the heavy weight additive is barite, lime stone, bloodstone,
One or more of wustite, iron oxide, magnesium carbonate can determine addition according to the requirement of drilling fluid density.
In water-base drilling fluid of the present invention, shale control agent can also be included, the shale control agent dosage is water consumption
0.1-2wt%, preferably 1-2wt%.The shale control agent can be with potassium chloride, potassium sulfate, potassium nitrate, ammonium chloride, ammonium sulfate, nitre
One or more of sour ammonium, polyethylene glycol, polypropylene glycol, polyethylene glycol propylene glycol block polymer.
Amphoteric ion polymer of the present invention be N, N- dimethyl-allyls propane sulfonic acid salt/acrylamide binary copolymerization
Object, concrete structure are as follows：
The synthetic method of amphoteric ion polymer of the present invention includes the following steps：
（1）It is 2 to weigh molar ratio respectively first:1~8:1 N, N- dimethylallylamine and 1,3-propane sultone,
And to N, 1,3-propane sultone is added in N- dimethylallylamine, 0.5~4h is then reacted at a temperature of 10~60 DEG C,
Last filtered, extracting, dry obtained N, N- dimethyl-allyl propane sulfonic acid salt；
（2）According to（5~2）：（5~8）Molar ratio weigh step respectively（1）Obtained N, N- dimethyl-allyls third
Sulfonate and acrylamide are passed through N after adding in solvent dissolving20.5~1h is reacted in deoxygenation, while is warming up to 50~70 DEG C, constant temperature 5
4~6h of initiator for reaction is added in after~10min, gelatinous solid is obtained after reaction, white depositions is obtained with acetone precipitation；
（3）By step（2）Obtained sediment dry 16 at 100~120 DEG C~crush afterwards for 24 hours, final both sexes from
Sub- copolymer.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Middle N, N- dimethylallylamine and 1,
The molar ratio of 3-N-morpholinopropanesulfonic acid lactone is 3:1~5:1.
In the method for the present invention, step（1）Middle 1,3-propane sultone is added drop-wise to N, in N- dimethylallylamine or straight
It connects and is disposably added to N, in N- dimethylallylamine, be preferably directly added into mode.It is weighed during using directly disposable addition
N, N- dimethylallylamine and 1,3-propane sultone molar ratio are 5:1~8:1.Using N during the mode of dropwise addition, N- dimethyl
Allyl amine and 1,3-propane sultone molar ratio are 2:1~5:1,1,3-propane sultone can be heated and melted before dropwise addition.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Reaction condition be at 20~55 DEG C
At a temperature of react 1~3h.
In the synthetic method of amphoteric ion polymer of the present invention, step（1）Middle extraction solvent selects methanol or ethyl alcohol,
Preferred alcohol, extraction times are 1~3h.The drying is dry 10~20h under the conditions of 30~50 DEG C.
In the synthetic method of amphoteric ion polymer of the present invention, step（2）Described in solvent for deionized water or
Brine, adds in monomer gross mass a concentration of 20%~40% after solvent, and the NaCl concentration added in the brine is 0~0.5mol/
L。
In the synthetic method of amphoteric ion polymer of the present invention, step（2）The middle initiator used for potassium peroxydisulfate,
It is any in sodium peroxydisulfate, ammonium persulfate；The initiator amount accounts for monomer gross mass 0.4%~0.7%.
Water-base drilling fluid of the present invention is prepared via a method which, weighs water, amphoteric ion respectively first, in accordance with ratio
Polymer, anhydrous calcium chloride, native phase, flow pattern regulator, then add in native phase into water, after abundant aquation or dispersion, add in stream
Type conditioning agent, high-speed stirred make it add in anhydrous calcium chloride after fully dissolving, and add in temperature rise after anhydrous calcium chloride, wait to be down to
Amphoteric ion polymer is added in after room temperature, 24~48h of maintenance is stood after high-speed stirred dispersion, obtains drilling fluid.
The present invention relates to a kind of application of water-base drilling fluid in drilling process, can be now with the current in drilling process.
Compared with prior art, drilling fluid of the present invention has the following advantages that：
（1）CaCl in water-base drilling fluid of the present invention2It plays the role of a nucleus with amphoteric ion polymer, the two synergistic effect plays
Multifunctional effect, including rheological property, vena caval filter, rejection, greasy property etc..The wherein viscosity of amphoteric ion polymer
With CaCl2The increase of content and gradually increase, embody apparent thickening and carry and cuts effect；Due to high-content CaCl2Presence, shielding
Internal salt structure in amphoteric ion polymer structure so that contained sulfonic group and ammonium fully expose, and further act on
Native phase enhances the filtrate reducing ability of system；High-content CaCl2Stronger inhibition is respectively provided with amphoteric ion polymer itself
Can, their collaboration is so that the inhibition of system is stronger；The greasy property of system has reached or has been more than oil base drilling fluid
It is horizontal；More than whole excellent properties be that current water-base drilling fluid is short of.
（2）1,3-propane sultone is added to excessive N, N- dimethyl by amphoteric ion polymer synthetic method of the present invention
In allyl amine, excessive N, N- dimethylallylamine acts not only as raw material and participates in reaction, and can play molten
The effect of agent, it is solvent to avoid and toxic acetone is used in conventional method, is a kind of synthetic method of green.
（3）Amphoteric ion polymer synthetic method of the present invention is by controlling 1,3-propane sultone and N, N- dimethallyls
Mole when feeding mode of base amine, solves 1,3-propane sultone and N, N- dimethylallylamine is conventionally straight
When tapping into row reaction（Generally equimolar is than reaction）, it is impossible to the problem of obtaining monomer N, N- dimethyl-allyl propane sulfonic acid salt.
（4）Amphoteric ion copolymer prepared by the method for the present invention, due to N, N- dimethyl-allyl propane sulfonic acid salt is big point
Sub- polymerized monomer, being copolymerized obtained polymer has long-chain branch.In aqueous solution due to the presence of long-chain branch, polymerization is increased
The steric hindrance of object increases the hydrodynamic volume of polymer, and the trend that polymer is affected by temperature fracture hydrolysis is caused to subtract
Few, so as to improve the performance of its heatproof, heatproof is up to 180 DEG C.
（5）The method of the present invention prepare amphoteric ion copolymer belong in salt form amphoteric ion polymer, with traditional both sexes from
It is intermolecular since electrostatic attraction acts in fresh water unlike sub- polymer, it shows as strand and curls.And with high salt
In high calcium solution, due to the presence of small molecule salt, intermolecular association is shielded, intermolecular electrostatic attraction is changed
For electrostatic repulsion forces so that strand is more unfolded.Apparent " anti-polyelectrolyte " effect that it is shown makes the property of polymer
Can gradually it enhance with the increase of salt amount.It can anti-NaCl saturations and CaCl2Saturation, this is current almost all of zwitterion polymerization
The anti-calcium and anti-salt performance that object does not have.Also contain a large amount of quaternary ammonium in the amphoteric ion copolymer structure that the method for the present invention obtains
Cation group enables polymer to have superior shale inhibition.
Specific embodiment
The effect of the method for the present invention and effect are illustrated, but following embodiment is not formed to this with reference to embodiment
The limitation of scheme of the invention.
Embodiment 1
N, N- dimethyl-allyl propane sulfonic acid salt are prepared first.
Weigh 430g N, N- dimethylallylamine（DA）It pours into reactor, is then placed in thermostat water bath, heat
And start to stir.122g1,3-N-morpholinopropanesulfonic acid lactone are weighed again（PS）, it is added directly into DA, reaction temperature is 45 DEG C, and stirring is anti-
N, N- dimethyl-allyl propane sulfonic acid salt are obtained after answering 3h（DAPS）Crude product.DAPS crude products are transferred in large stretch of filter paper
It wraps, is positioned in Soxhlet extraction device, the use of ethyl alcohol is solvent extraction 3h, filter paper packet is placed on drying box after extracting
In, it is dry at 50 DEG C, finally obtain pure DAPS monomers, yield 94.3%.
Comparative example 1（Directly react）
According to stoichiometric ratio DA：PS is 1:1 reaction.It weighs 85gDA to pour into reactor, is then placed in thermostat water bath
In, it heats and starts to stir.122gPS is weighed again, is added directly into DA, and reaction temperature is 20 DEG C, is obtained after being stirred to react 0.5h
To mass polymerization product, without DAPS monomers, yield 0.A large amount of hot nothing is produced during according to stoichiometric reaction, in reaction
Method disperses in time, and temperature moment steeply rises, and raw material DA and product DAPS is caused all to polymerize.
Comparative example 2（Conventional method, using acetone as solvent reaction）
It weighs 90gDA to pour into reactor, be then placed in thermostat water bath, heat and start to stir.It weighs again
122gPS is dissolved in 650g acetone, and mixed solution is added directly into DA, and reaction temperature is 60 DEG C, is obtained after being stirred to react 4h
The crude product of DAPS.DAPS crude products are transferred in large stretch of filter paper and are wrapped, are positioned in Soxhlet extraction device, are using ethyl alcohol
Filter paper packet is placed in drying box by solvent extraction 2h after extracting, dry at 35 DEG C, and it is mono- to finally obtain pure DAPS
Body, yield 81.7%.
Embodiment 2
103gDAPS, 35gAM are weighed respectively, and reactor, total monomer are transferred to after adding a certain amount of deionized water dissolving
It is 35%.It is passed through N2Deoxygenation 1h, while 60 DEG C are warming up to, 0.7g potassium peroxydisulfates are added in after keeping 30min, are coagulated after reacting 6h
Colloidal solid obtains white depositions with acetone precipitation.Drying crushes afterwards for 24 hours at 110 DEG C, final to obtain DAPS/AM amphoteric ions
Copolymer.
Embodiment 3
60gDAPS, 50gAM, 15gNaCl are weighed respectively, and reactor, monomer are transferred to after adding a certain amount of deionized water dissolving
Total concentration is 40%.It is passed through N2Deoxygenation 1h, while 55 DEG C are warming up to, 0.75g ammonium persulfates are added in after keeping 30min, after reacting 5h
Gelatinous solid is obtained, white depositions are obtained with acetone precipitation.Drying crushes afterwards for 24 hours at 110 DEG C, final to obtain DAPS/AM two
Property ionic copolymer.
Embodiment 4
350ml tap water is weighed first, is added in 7g attapulgites, is added in 1.2g xanthans after high-speed stirred 10min, continue
High-speed stirred 10min stands maintenance 2h；Add in the anhydrous CaCl of 130g2, stand after high-speed stirred 10min and be cooled to room temperature；It adds in
Polymer prepared by 6.5g embodiments 2, high-speed stirred 10min stand maintenance for 24 hours, obtain drilling fluid system.
Embodiment 5
350ml tap water is weighed first, adds in 10g calcium-base bentonites, 1g welan gums are added in after high-speed stirred 10min, after
Continuous high-speed stirred 10min stands maintenance 2h；Add in the anhydrous CaCl of 180g2, stand after high-speed stirred 10min and be cooled to room temperature；Add
Enter the polymer of the preparation of 10g embodiments 3, high-speed stirred 10min stands maintenance 36h, obtains drilling fluid system.
Embodiment 6
Same as Example 4, difference is free of calcium chloride for drilling fluid.
Embodiment 7
Same as Example 4, difference is the 2wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 8
Same as Example 4, difference is the 5wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 9
Same as Example 4, difference is the 10wt% that calcium chloride dosage is water consumption in drilling fluid.
Embodiment 10
Same as Example 4, difference is the 25wt% that calcium chloride dosage is water consumption in drilling fluid.
Testing performance of drilling fluid：
Testing performance of drilling fluid includes the test of rheological property, vena caval filter, rejection, greasy property, test result
It is shown in Table 1~table 4.Wherein, rheological property is measured using the fast rotational viscometer of ZNN-D6 types six, passes through obtained φ 600, φ
300th, each rheological parameter is calculated in φ 6,3 data of φ；Filter loss is committed a breach of etiquette using the multi-joint middle press filtration of SD-6A types filters with high temperature and pressure
It commits a breach of etiquette and is measured, testing time 30min；Rejection rolls recycling test for shale, and method is：By the shale of certain mass
It adds in drilling fluid, aging 16h is rolled at 120 DEG C, take out and recycled with 0.42mm standard screens, calculate primary recovery.Recycling
Shale afterwards is positioned in clear water the rolling aging 2h at 120 DEG C, takes out and is recycled with 0.42mm standard screens, calculates secondary recovery
Rate；Greasy property is measured using extreme boundary lubrication instrument EP-B and sticking coefficient analyzer NF-2.
1 rheological property of table
| PV/mPa•s | YP/Pa | Gel/Pa/Pa | Φ6/Φ3 | |
| Embodiment 4 | 31 | 12 | 5/9 | 6/5 |
| Embodiment 5 | 33 | 9 | 6/8 | 5/3 |
| Embodiment 6 | 17 | 3 | 2/3 | 1/1 |
| Embodiment 7 | 18 | 4 | 2/3 | 1/1 |
| Embodiment 8 | 20 | 4 | 2/3 | 2/1 |
| Embodiment 9 | 22 | 5 | 3/4 | 2/1 |
| Embodiment 10 | 26 | 6.5 | 3.5/4.5 | 3/2 |
2 vena caval filter of table
| API filtration/ml（Room temperature） | API filtration/ml（120℃） | HTHP filter losses/ml（80℃） | |
| Embodiment 4 | 3.5 | 3.2 | 6 |
| Embodiment 5 | 4.0 | 4.8 | 7.5 |
| Embodiment 6 | 9.5 | 9.2 | 12 |
| Embodiment 7 | 9.0 | 8.2 | 10 |
| Embodiment 8 | 8.0 | 8.0 | 8 |
| Embodiment 9 | 7.2 | 6.5 | 7.5 |
| Embodiment 10 | 5.5 | 5.0 | 6.5 |
3 rejection of table
| Primary recovery/% | Secondary returning yield/% | |
| Embodiment 4 | 100 | 100 |
| Embodiment 5 | 100 | 100 |
| Clear water | 9.8 | -- |
| Embodiment 6 | 92.8 | 88.5 |
| Embodiment 7 | 93.4 | 88.0 |
| Embodiment 8 | 95.1 | 91.1 |
| Embodiment 9 | 96.2 | 92.5 |
| Embodiment 10 | 97.3 | 93.5 |
4 greasy property of table
| Lubricating coefficient | Filter cake sticking coefficient | |
| Embodiment 4 | 0.086 | 0.00338 |
| Embodiment 5 | 0.038 | 0.00845 |
| Embodiment 6 | 0.118 | 0.1014 |
| Embodiment 7 | 0.108 | 0.0845 |
| Embodiment 8 | 0.094 | 0.0803 |
| Embodiment 9 | 0.091 | 0.0676 |
| Embodiment 10 | 0.089 | 0.0422 |
Claims (18)
1. a kind of water-base drilling fluid, it is characterised in that the drilling fluid includes water, amphoteric ion polymer, anhydrous calcium chloride, soil
Phase, flow pattern regulator, wherein, on the basis of the weight of water, amphoteric ion polymer dosage is the 0.5-5wt% of water consumption, anhydrous
Calcium chloride dosage is the 20-70wt% of water consumption, and native phase dosage is the 0-6wt% of water consumption, and flow pattern regulator dosage is water consumption
0.1-0.4wt%, the amphoteric ion polymer be N, N- dimethyl-allyls propane sulfonic acid salt/acrylamide bipolymer.
2. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The amphoteric ion polymer dosage is water consumption
1.5-3wt%, anhydrous calcium chloride dosage be water consumption 30-60wt%, native phase dosage be water consumption 1.5-4wt%, flow pattern tune
Save the 0.2-0.3wt% that agent dosage is water consumption.
3. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The soil is mutually sodium bentonite, calcium base swelling
One or more of soil, attapulgite, sepiolite.
4. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The flow pattern regulator be xanthans, guar gum,
One or more of welan gum.
5. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The amphoteric ion polymer is as follows
It prepares：（1）It is 2 to weigh molar ratio respectively first:1~8:1 N, N- dimethylallylamine and 1,3-propane sultone, and to
1,3-propane sultone is added in N, N- dimethylallylamine, 0.5~4h is then reacted at a temperature of 10~60 DEG C, finally
Filtered, extracting, dry obtained N, N- dimethyl-allyl propane sulfonic acid salt；（2）According to（5~2）：（5~8）Molar ratio difference
Weigh step（1）Obtained N, N- dimethyl-allyl propane sulfonic acid salt and acrylamide are passed through N after adding in solvent dissolving2It removes
Oxygen reacts 0.5~1h, while is warming up to 50~70 DEG C, and 4~6h of initiator for reaction is added in after 5~10min of constant temperature, is obtained after reaction
Gelatinous solid obtains white depositions with acetone precipitation；（3）By step（2）Obtained sediment is dry at 100~120 DEG C
16~crush afterwards for 24 hours, obtain amphoteric ion polymer.
6. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Middle N, N- dimethylallylamine and
The molar ratio of 1,3-propane sultone is 3:1~5:1.
7. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Middle 1,3-propane sultone is added drop-wise to
In N, N- dimethylallylamine or directly N is disposably added to, in N- dimethylallylamine.
8. according to the water-base drilling fluid described in claim 7, it is characterised in that：The N, N- weighed during using directly disposable addition
Dimethylallylamine and 1,3-propane sultone molar ratio are 5:1~8:1.
9. according to the water-base drilling fluid described in claim 7, it is characterised in that：Using N during the mode of dropwise addition, N- dimethyl-allyls
Amine and 1,3-propane sultone molar ratio are 2:1~5:1.
10. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（1）Described in extraction solvent select methanol
Or ethyl alcohol, the extraction times are 1~3h.
11. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（2）Described in solvent for deionized water or
Person's brine, the NaCl concentration added in the brine are 0~0.5mol/L, add in monomer gross mass a concentration of 20% after solvent~
40%。
12. according to the water-base drilling fluid described in claim 5, it is characterised in that：Step（2）The middle initiator used is persulfuric acid
Any in potassium, sodium peroxydisulfate, ammonium persulfate, the initiator amount accounts for monomer gross mass 0.4%~0.7%.
13. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The drilling fluid includes shale control agent, described
Shale control agent dosage is the 0.1-2wt% of water consumption.
14. according to the water-base drilling fluid described in claim 13, it is characterised in that：The shale control agent dosage is water consumption
1-2wt%。
15. according to the water-base drilling fluid described in claim 13, it is characterised in that：The shale control agent is potassium chloride, sulfuric acid
In potassium, potassium nitrate, ammonium chloride, ammonium sulfate, ammonium nitrate, polyethylene glycol, polypropylene glycol, polyethylene glycol propylene glycol block polymer
It is one or more of.
16. water-base drilling fluid described in accordance with the claim 1, it is characterised in that：The drilling fluid includes heavy weight additive, the exacerbation
Agent is barite, lime stone, bloodstone, wustite, iron oxide, one or more of magnesium carbonate, according to drilling fluid density
It is required that determine addition.
17. application of the water-base drilling fluid in claim 1 to 16 described in any claim in drilling process.
18. the preparation method of water-base drilling fluid described in any claim in claim 1 to 16, including following content, first
Water, amphoteric ion polymer, anhydrous calcium chloride, native phase, flow pattern regulator are proportionally weighed respectively, and soil is then added in into water
After phase, abundant aquation or dispersion, flow pattern regulator is added in, high-speed stirred makes it add in anhydrous calcium chloride after fully dissolving, and adds in
Temperature rise after anhydrous calcium chloride, addition amphoteric ion polymer to be cooled to room temperature stand maintenance 24 after high-speed stirred dispersion
~48h, obtains drilling fluid.
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| CN107663450A (en) * | 2016-07-28 | 2018-02-06 | 安庆五宁精细化工有限责任公司 | A kind of efficient expansion-resisting agent of nonionic |
| CN108728058A (en) * | 2018-06-29 | 2018-11-02 | 长江大学 | A kind of drilling fluid inhibitor and its application |
| CN110734747B (en) * | 2018-07-18 | 2022-07-08 | 中石化石油工程技术服务有限公司 | Potassium nitrate drilling fluid and preparation method thereof |
| CN110452669A (en) * | 2019-08-16 | 2019-11-15 | 中石化石油工程技术服务有限公司 | Low viscous undercut low cost Strong Inhibitive Drilling Fluids of one kind and preparation method thereof |
| CN116023913A (en) * | 2021-10-25 | 2023-04-28 | 中国石油化工股份有限公司 | Drilling fluid and preparation method and application thereof |
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