CN103773331B - A kind of high-efficient drilling fluid and preparation method thereof - Google Patents
A kind of high-efficient drilling fluid and preparation method thereof Download PDFInfo
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- CN103773331B CN103773331B CN201210408209.2A CN201210408209A CN103773331B CN 103773331 B CN103773331 B CN 103773331B CN 201210408209 A CN201210408209 A CN 201210408209A CN 103773331 B CN103773331 B CN 103773331B
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- 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
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Abstract
The open a kind of drilling fluid of the present invention, counts, by weight containing the bentonite of 2.0 6.0 parts, 3.0 7.0 parts of sulfonated phenol formaldehyde resins, 2.0 6.0 parts of walchowites, 0.03 0.4 parts of sodium hydroxide, 0.5 3.0 parts of sulfonated gilsonites, 3.0 8.0 parts of KCl, 0.03 0.8 parts of polyamine polymers, 100 parts of water;Described polyamine polymer is end diamidogen, cyclic ethers and the polymer of epoxy alkyl halide;Preferably comprise the bentonite of 3.0 5.0 parts, 4.0 6.0 parts of sulfonated phenol formaldehyde resins;3.0 5.0 parts of walchowites, 0.1 0.3 parts of sodium hydroxide, 1.0 2.0 parts of sulfonated gilsonites, 4.0 6.0 parts of KCl, 0.05 0.3 parts of polyamine polymers.This drilling fluid system rejection and caving-preventing characteristic are good, can effectively solve the practical problems such as shale hydration dispersion expansion and cave-in.
Description
Technical field
The present invention relates to a kind of drilling fluid and preparation method thereof, relate in particular to a kind of strong rejection capability Heat Resistant and Salt Tolerant Polymer drilling fluid and its preparation method and application.
Background technology
In drilling engineering, met stratum 75% is mud shale layer, and the borehole instability problems of about 90% occurs in mud shale well section, and for high temperature and high salt stratum, the problems referred to above are even more serious.The application of the drilling fluid containing potassium ion makes the dispersion pulping of mud shale obtain preferable control, and the submicron particle in drilling fluid and solid concentration inferior are substantially reduced, and rate of penetration is greatly improved.But it is as the continuous application of technology, the most cruelly spills some shortcomings, as limited in drilling fluid rejection ability, anti sloughing effectiveness, it is short of in terms of the dispersion pulping solving high temperature and high salt mud shale stratum and borehole wall water suction destabilization problems.Therefore, to have the Heat Resistant and Salt Tolerant Polymer drilling fluid system of strong rejection capability particularly important in research and development.
After potassium ion is used alone as shale control agent, abroad develops polymer/KCl system, but environment is caused certain injury by this type of high salt drilling fluid system, must treated could discharge.Additionally, above-mentioned wellbore fluid ties up to be short of when running into high temperature and high salt stratum, and the shale inhibition good ring of energy is heavily dependent on the concentration of inorganic electrolyte KCl, and concentration is the highest, and effect is the best causes subsequent treatment increasingly difficult above.The most domestic existing KCl polysulfonate caving-preventing drilling fluid rejection that commonly uses for high temperature and high salt stratum, caving-preventing characteristic are limited, there is to fall the defects such as block is serious running into mudstone stratum.
CN10149424A relates to the double potassium ion polymer drilling fluid of a kind of strong rejection capability, it is characterized in that: the double potassium ion polymer drilling fluid of strong rejection capability includes the material of following weight percentage ratio: A. is as the inorganic potassium salt 7%-9% of inorganic inhibitor;B. as the potassium salt 0.5%-0.6% of organic inhibitor;C. stick 0.3%-0.5% is carried;D. fluid loss additive 0.3%-0.5%;E. alkalinity control agent 0.3%-0.5%;F. preservative 0.03%-0.1%;G defoamer 0.1%-0.2%;H. heavy weight additive 1%-8%;Surplus is water.This drilling fluid system is not suitable for high temperature and high salt stratum, and caving control limited capacity.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of strong rejection capability Heat Resistant and Salt Tolerant Polymer drilling fluid and preparation method thereof.This drilling fluid system rejection and caving-preventing characteristic are good, can effectively solve the practical problems such as shale hydration dispersion expansion and cave-in.
A kind of drilling fluid, counts, by weight containing the bentonite of 2.0-6.0 part, 3.0-7.0 part sulfonated phenol formaldehyde resin, 2.0-6.0 part walchowite, 0.03-0.4 part sodium hydroxide, 0.5-3.0 part sulfonated gilsonite, 3.0-8.0 part KCl, 0.03-0.8 part polyamine polymer, 100 parts of water;Described polyamine polymer is end diamidogen, cyclic ethers and the polymer of epoxy alkyl halide;Preferably comprise the bentonite of 3.0-5.0 part, 4.0-6.0 part sulfonated phenol formaldehyde resin;3.0-5.0 part walchowite, 0.1-0.3 part sodium hydroxide, 1.0-2.0 part sulfonated gilsonite, 4.0-6.0 part KCl, 0.05-0.3 part polyamine polymer.
In the present invention, the screen over-size of bentonite 75 μm sieve is less than 4%;The condensation polymer that sulfonated phenol formaldehyde resin is obtained under proper condition by formaldehyde, phenol and azochlorosulfonate methyl agent, good water solubility, salt pollution capacity high temperature resistant, anti-is strong, filtrate reducing is effective, its water insoluble matter content≤10.0%, cloud point salinity >=160 g/L, apparent viscosity≤50.0m Pa s, high temperature and high pre ssure filtration≤40.0mL;Walchowite is formed by the copolymerization such as nitro humic acid, sulfonated-pheno-formoldehyde resin, its moisture≤20%, water-insoluble≤15%, fresh water slurry high temperature and high pre ssure filtration≤35mL, salt slurries high temperature and high pre ssure filtration≤40mL, fresh water slurry apparent viscosity≤20mPa s, salt slurries apparent viscosity≤40mPa s;Sulfonated gilsonite is the sulfonated products of Colophonium, its high temperature and high pre ssure filtration≤30.0mL, relative expansion reduction rate≤55.0%.
The kinematic viscosity of heretofore described polyamine polymer is 300 mm2/s -2000 mm2/ s, cationic degree 0.75 mmol/g-3.6 mmol/g;It is preferably kinematic viscosity 500 mm2/s
-1300 mm2/ s, cationic degree 1.0 mmol/g-3.0 mmol/g.
The preparation method of a kind of drilling fluid, first prepares polyamine polymer, makes end diamidogen, cyclic ethers and epoxy alkyl halide carry out copolyreaction and generates polyamine polymer;Then drilling fluid is made than preparation containing bentonite, sulfonated phenol formaldehyde resin, walchowite, sodium hydroxide, sulfonated gilsonite, KCl, the aqueous solution of polyamine polymer by metering.
End diamidogen described in the inventive method, cyclic ethers and epoxy alkyl halide copolyreaction are as follows: first dripping cyclic ethers under the conditions of stirring and 50-120 DEG C in end diamidogen, the mol ratio of cyclic ethers and end diamidogen is 0.5-4:1, reacts 1-4h after completion of dropwise addition;Then temperature is risen to 80-150 DEG C, epoxy alkyl halide is dripped under stirring condition, the mol ratio of epoxy alkyl halide and end diamidogen is 0.1-1:1,1-4h is reacted after completion of dropwise addition, add terminator, the mol ratio of terminator and end diamidogen is 0.5-2:1, continues reaction 1-4h, obtains cationic polyamine base polymer sample.
The inventive method middle-end diamidogen is ethylenediamine, propane diamine, butanediamine, pentanediamine, hexamethylene diamine etc..Cyclic ethers is expoxy propane, epoxy butane etc..Epoxy alkyl halide is epoxychloropropane, epoxy bromopropane, epoxy chlorobutane etc..Terminator is hydrochloric acid, sulphuric acid, nitric acid, glacial acetic acid, citric acid, formic acid, acetic acid etc..
Field application test result shows: compared with existing commonly used drilling fluid, the drilling fluid system of the present invention can be for high temperature and high salt stratum, effectively suppress the aquation of mud shale, disperse and expand, the serious problems of the drilling process such as the pulping of suppression inferior soil and borehole wall water suction unstability, have the good effect preventing cave-in.Additionally, the drilling fluid system inanimate object toxicity of the present invention, meet environmental requirement.
Detailed description of the invention
Illustrate the functions and effects of the inventive method below in conjunction with embodiment, but following example do not constitute the restriction to the inventive method.
In the present invention, bentonite buying is from Shandong Shang Bujinxin bentonite factory, and the screen over-size of 75 μm sieves is less than 4%;Sulfonated phenol formaldehyde resin is purchased from Henan Jinma Petroleum Technology Co., Ltd., its water insoluble matter content≤8.0%, cloud point salinity >=160 g/L, apparent viscosity≤50.0m Pa s, high temperature and high pre ssure filtration≤35.0mL;Walchowite buying is from Pingxiang City Bo Xin Industrial Co., Ltd., its moisture≤18%, water-insoluble≤12%, fresh water slurry high temperature and high pre ssure filtration≤30mL, salt slurries high temperature and high pre ssure filtration≤35mL, fresh water slurry apparent viscosity≤20mPa s, salt slurries apparent viscosity≤40mPa s;Sulfonated gilsonite derives from Puyang Lu Tong petrochemical industry company limited, for black mastic product, its high temperature and high pre ssure filtration≤24.0mL, relative expansion reduction rate≤55.0%.
Embodiment 1
Polyamine polymer is product after diamidogen, expoxy propane and epichlorohydrin reaction, preparation method is to drip expoxy propane under the conditions of stirring and 60 DEG C in diamidogen, reaction 4h, then temperature is risen to 90 DEG C, epoxychloropropane is dripped under stirring condition, reaction 4h adds hydrochloric acid, continues reaction 4h, obtains cationic polyamine base polymer sample.Controlling diamidogen, expoxy propane, epoxychloropropane and hydrochloric acid molar ratio is 1:0.8:0.7:2.0.The kinematic viscosity of the polyamine polymer prepared is 1203.3 mm2/ s, cationic degree is 2.986mmol/g.In drilling fluid, the concrete mass fraction of each component is shown in Table 1.
Table 1 drilling fluid composition
Component | Mass fraction | |
1 | Bentonite | 4.0 |
2 | Sulfonated phenol formaldehyde resin | 5.0 |
3 | Walchowite | 4.0 |
4 | Sodium hydroxide | 0.2 |
5 | Sulfonated gilsonite | 1.5 |
6 | KCl | 6 |
7 | Polyamine polymer | 0.1 |
8 | Water | 100 |
Embodiment 2
Polyamine polymer is the reacted product of pentanediamine, expoxy propane and epoxy bromopropane, preparation method is to drip expoxy propane under the conditions of stirring and 80 DEG C in pentanediamine, reaction 4h, then temperature is risen to 98 DEG C, epoxy bromopropane is dripped under stirring condition, reaction 3h adds glacial acetic acid, continues reaction 2h, obtains cationic polyamine base polymer sample.Controlling pentanediamine, expoxy propane, epoxy bromopropane and glacial acetic acid molar ratio is 1:2:0.5:1.0, and its kinematic viscosity is 857.3 mm2/ s, cationic degree is 1.568mmol/g.The concrete mass fraction of each component is shown in Table 2.
Table 2 drilling fluid composition
Component | Mass fraction | |
1 | Bentonite | 5.0 |
2 | Sulfonated phenol formaldehyde resin | 4.0 |
3 | Walchowite | 3.0 |
4 | Sodium hydroxide | 0.3 |
5 | Sulfonated gilsonite | 2.0 |
6 | KCl | 5.0 |
7 | Polyamine polymer | 0.2 |
8 | Water | 100 |
Embodiment 3
Polyamine polymer is butanediamine, epoxy butane and the reacted product of epoxy chlorobutane, preparation method is to drip epoxy butane under the conditions of stirring and 100 DEG C in butanediamine, reaction 1h, then temperature is risen to 140 DEG C, epoxy chlorobutane is dripped under stirring condition, reaction 1h adds formic acid, continues reaction 1h, obtains cationic polyamine base polymer sample.Controlling butanediamine, epoxy butane, epoxy chlorobutane and formic acid molar ratio is 1:4:0.4:0.8, and its kinematic viscosity is 456.4mm2/ s, cationic degree is 0.906mmol/g.The concrete mass fraction of each component is shown in Table 3.
Table 3 drilling fluid composition
Component | Mass fraction | |
1 | Bentonite | 3.0 |
2 | Sulfonated phenol formaldehyde resin | 6.0 |
3 | Walchowite | 5.0 |
4 | Sodium hydroxide | 0.1 |
5 | Sulfonated gilsonite | 1.0 |
6 | KCl | 4.0 |
7 | Polyamine polymer | 0.3 |
8 | Water | 100 |
In Zhongyuan Oil Field, unconventional development level well has carried out on-the-spot test to embodiment 1-3.In drilling process, the change of the viscosity of drilling fluid, shear force is little, performance kept stable, and the drilling cuttings that returns out from vibrosieve is complete, visible drilling fluid system can effectively suppress the hydration swelling of drilling cuttings to disperse, and beneficially solid control equipment removes drilling cuttings, thus controls the content of harmful solid phase in drilling fluid, keep stablizing of property of drilling fluid, it is ensured that fast and safely creep into.Simultaneously in 60h the rheological property change of drilling fluid not also show the drilling fluid system rejection ability persistent period long very much.Completion logging shows, hole enlargement ratio is obviously reduced (being reduced to 5.88% by 11.49%).In the whole drilling process of drilling fluid, do not have down hole problem to occur, make a trip unimpeded, smooth finishing drilling.Drifting process is without blocked portion phenomenon, and electrical measurement once success, setting of casing and well cementing operation are smooth.Illustrate that wellbore fluid ties up to mudstone stratum and can effectively suppress mud stone to disperse, play the effect of stabilizing borehole.
Comparative example
Drilling fluid system is KCl polysulfonate caving-preventing drilling fluid, system consists of+0.5 part of FA-367+6 part KCl+4 part SPNH+5 part SMP+100 of+0.2 part of sodium hydroxide of 4 parts of bentonite and divides water, wherein FA-367 purchases from Zhengzhou Yu Hua auxiliary agent company limited, apparent viscosity >=30.0, cation ionization degree >=10%;SPNH buying is from Pingxiang City Bo Xin Industrial Co., Ltd., and for micro-reddish black powder or granule, soluble in water, aqueous solution is alkalescence;SMP purchases from Henan Jinma Petroleum Technology Co., Ltd., for free flowing powder, its apparent viscosity≤50.0mPa s, high temperature and high pre ssure filtration≤35.0mL.
When comparative example is applied at literary composition 88-FP1 unconventional development level well scene, Zhongyuan Oil Field, viscous the cutting of drilling fluid changes greatly, and yield value increases to 13Pa from 5.3Pa, and egress increases to 19Pa from 4.5Pa, and plastic viscosity increases to 46mPa s from 39mPa s.This well section circulation of drilling fluid time about 80h, visible drilling fluid cannot effectively suppress the aquation of drilling cuttings to disperse, harmful solid phase is continuously increased, thus cause drilling fluid in shorter drilling depth and in the short period rheological property change greatly, it is impossible to maintain the requirement that drilling fluid is stable when meeting safety drilling.
Claims (5)
1. a drilling fluid, it is characterised in that: count by weight, containing the bentonite of 2.0-6.0 part, 3.0-7.0 part sulfonated phenol formaldehyde resin, 2.0-6.0 part walchowite, 0.03-0.4 part sodium hydroxide, 0.5-3.0 part sulfonated gilsonite, 3.0-8.0 part KCl, 0.03-0.8 part polyamine polymer, 100 parts of water;Described polyamine polymer is end diamidogen, cyclic ethers and the polymer of epoxy alkyl halide, and the kinematic viscosity of described polyamine polymer is 300 mm2/s -2000
mm2/ s, cationic degree 0.75 mmol/g-3.6 mmol/g,
The preparation method of described polyamine polymer is as follows: first dripping cyclic ethers under the conditions of stirring and 50-120 DEG C in end diamidogen, the mol ratio of cyclic ethers and end diamidogen is 0.5-4:1, reacts 1-4h after completion of dropwise addition;Then temperature is risen to 80-150 DEG C, epoxy alkyl halide is dripped under stirring condition, the mol ratio of epoxy alkyl halide and end diamidogen is 0.1-1:1,1-4h is reacted after completion of dropwise addition, add terminator, the mol ratio of terminator and end diamidogen is 0.5-2:1, continue reaction 1-4h, obtain cationic polyamine base polymer sample, described end diamidogen is ethylenediamine, propane diamine, butanediamine, pentanediamine or hexamethylene diamine, described cyclic ethers is expoxy propane or epoxy butane, and described epoxy alkyl halide is epoxychloropropane, epoxy bromopropane or epoxy chlorobutane.
Drilling fluid the most according to claim 1, it is characterised in that: containing the bentonite of 3.0-5.0 part, 4.0-6.0 part sulfonated phenol formaldehyde resin;3.0-5.0 part walchowite, 0.1-0.3 part sodium hydroxide, 1.0-2.0 part sulfonated gilsonite, 4.0-6.0 part KCl, 0.05-0.3 part polyamine polymer.
Drilling fluid the most according to claim 1, it is characterised in that: kinematic viscosity 500 mm2/s -1300
mm2/ s, cationic degree 1.0 mmol/g-3.0 mmol/g.
4. the preparation method of drilling fluid described in claim 1, it is characterised in that: first prepare polyamine polymer, make end diamidogen, cyclic ethers and epoxy alkyl halide carry out copolyreaction and generate polyamine polymer;Then drilling fluid is made than preparation containing bentonite, sodium carboxymethyl cellulose, amphoteric sulfonated copolymer, sodium hydroxide, the aqueous solution of polyamine polymer by metering, end diamidogen, cyclic ethers and epoxy alkyl halide copolyreaction are as follows: first drip cyclic ethers in end diamidogen under the conditions of stirring and 50-120 DEG C, the mol ratio of cyclic ethers and end diamidogen is 0.5-4:1, reacts 1-4h after completion of dropwise addition;Then temperature is risen to 80-150 DEG C, epoxy alkyl halide is dripped under stirring condition, the mol ratio of epoxy alkyl halide and end diamidogen is 0.1-1:1,1-4h is reacted after completion of dropwise addition, add terminator, the mol ratio of terminator and end diamidogen is 0.5-2:1, continue reaction 1-4h, obtain cationic polyamine base polymer sample, described end diamidogen is ethylenediamine, propane diamine, butanediamine, pentanediamine or hexamethylene diamine, described cyclic ethers is expoxy propane or epoxy butane, and described epoxy alkyl halide is epoxychloropropane, epoxy bromopropane or epoxy chlorobutane.
Method the most according to claim 4, it is characterised in that: terminator is hydrochloric acid, sulphuric acid, nitric acid, citric acid, formic acid or acetic acid.
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CN105295874A (en) * | 2014-06-19 | 2016-02-03 | 成都棕通石油配件有限公司 | Mud for large borehole drilling |
CN105713581A (en) * | 2014-12-04 | 2016-06-29 | 中国石油化工股份有限公司 | Solid-phase-free strongly-inhibitive drilling fluid with strong plugging effect and preparation method thereof |
CN106608958B (en) * | 2015-10-27 | 2019-02-22 | 新疆真帝石油科技有限公司 | A kind of manufacturing method of carboxymethyl sulfonated phenol formaldehyde resin and the application of carboxymethyl sulfonated phenol formaldehyde resin |
CN108690578B (en) * | 2017-04-10 | 2020-11-10 | 中国石油化工股份有限公司 | Water-based drilling fluid and preparation method thereof |
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CN1955122A (en) * | 2005-10-26 | 2007-05-02 | 中国石油化工股份有限公司 | Method for treating oil-containing waste water |
CN101747876A (en) * | 2008-12-16 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Potassium carbonate polyamine drilling fluid |
CN102002349A (en) * | 2010-11-12 | 2011-04-06 | 中国海洋石油总公司 | Seawater-based polyamine well completion fluid and preparation method thereof |
CN102391842A (en) * | 2011-09-28 | 2012-03-28 | 中国石油化工集团公司 | Polyamine drilling fluid |
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CN1955122A (en) * | 2005-10-26 | 2007-05-02 | 中国石油化工股份有限公司 | Method for treating oil-containing waste water |
CN101747876A (en) * | 2008-12-16 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Potassium carbonate polyamine drilling fluid |
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CN102391842A (en) * | 2011-09-28 | 2012-03-28 | 中国石油化工集团公司 | Polyamine drilling fluid |
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