CN103773332B - A kind of drilling fluid and preparation method thereof - Google Patents
A kind of drilling fluid and preparation method thereof Download PDFInfo
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- CN103773332B CN103773332B CN201210408288.7A CN201210408288A CN103773332B CN 103773332 B CN103773332 B CN 103773332B CN 201210408288 A CN201210408288 A CN 201210408288A CN 103773332 B CN103773332 B CN 103773332B
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- drilling fluid
- epoxy
- alkyl halide
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- diamidogen
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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
- C09K8/24—Polymers
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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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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Epoxy Resins (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The open a kind of drilling fluid of the present invention, counts, by weight containing the bentonite of 2.0 6.0 parts, 0.1 1 parts of sodium carboxymethyl cellulose, 0.2 0.8 parts of amphoteric sulfonated copolymers, 0.03 0.4 parts of sodium hydroxide, 0.1 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.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, sodium carboxymethyl cellulose, amphoteric sulfonated copolymer, sodium hydroxide, the aqueous solution of polyamine polymer by metering.This drilling fluid rejection and caving-preventing characteristic are good, owing to not containing potassium salt, without high salt is carried out subsequent treatment after using.
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 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.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 poor in drilling fluid rejection ability, anti sloughing effectiveness is limited, it is short of in terms of the dispersion pulping and the borehole wall solving mud shale stratum absorbs water destabilization problems.Therefore, to have the 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, the quality of shale inhibition energy is heavily dependent on the concentration of inorganic electrolyte KCl, concentration is the highest, and effect is the best, but the raising being as KCl concentration will cause subsequent treatment increasingly difficult.The most domestic existing KCl polysulfonate caving-preventing drilling fluid rejection that commonly uses, caving-preventing characteristic are limited, there is to fall the defects such as block is serious running into mudstone stratum.
The CN10149424A double potassium ion polymer drilling fluid of open a kind of strong rejection capability, the double potassium ion polymer drilling fluid of described 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 not only inorganic potassium salt content is higher, the problem that there is subsequent treatment, and there is also the deficiencies such as rejection in actual application, caving-preventing characteristic be limited.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of drilling fluid and preparation method thereof.This drilling fluid rejection and caving-preventing characteristic are good, do not contain potassium salt, without subsequent treatment after using.
A kind of drilling fluid, counts, by weight containing the bentonite of 2.0-6.0 part, 0.1-1 part sodium carboxymethyl cellulose, 0.2-0.8 part amphoteric sulfonated copolymer, 0.03-0.4 part sodium hydroxide, 0.1-0.8 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, 0.3-0.7 part sodium carboxymethyl cellulose, 0.2-0.6 part amphoteric sulfonated copolymer, 0.05-0.2 part sodium hydroxide, 0.1-0.5 part polyamine polymer.
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, sodium carboxymethyl cellulose, amphoteric sulfonated copolymer, sodium hydroxide, 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 effectively suppress the aquation of mud shale, disperses 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%；The buying of low viscous sodium carboxymethyl cellulose is from Shandong region Shengli Oil Field Sheng great cellulose factory, and for white powder graininess, its pH value is 7.3, and DS value is 0.87, purity 89.2%, and aqueous 8.3%, the viscosity in fresh water is 25cP, and its saturated brine filter loss is 6.7；Amphoteric sulfonated copolymer derives from Zhongyuan Oil Field drilling engineering Institute for Research and Technology, code name CPS-2000, for acrylamide, acrylic acid, 2-acryloyl-oxy-2-methyl propane sulfonic acid, the polymer of acrylamido diallyidimethylammonium chloride, 25 DEG C of apparent viscosities of its 1% aqueous solution are 10.0 mPa s.
Embodiment 1
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 Strong Inhibitive Drilling Fluids formula
| Component | Parts by weight | |
| 1 | Bentonite | 5 |
| 2 | Low viscous sodium carboxymethyl cellulose | 0.7 |
| 3 | Amphoteric sulfonated copolymer | 0.6 |
| 4 | Sodium hydroxide | 0.2 |
| 5 | Polyamine polymer | 0.5 |
| 6 | 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 | Parts by weight | |
| 1 | Bentonite | 4 |
| 2 | Low viscous sodium carboxymethyl cellulose | 0.5 |
| 3 | Amphoteric sulfonated copolymer | 0.4 |
| 4 | Sodium hydroxide | 0.15 |
| 5 | Polyamine polymer | 0.3 |
| 6 | Water | 100 |
Embodiment 3
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 | Parts by weight | |
| 1 | Bentonite | 3 |
| 2 | Low viscous sodium carboxymethyl cellulose | 0.3 |
| 3 | Amphoteric sulfonated copolymer | 0.2 |
| 4 | Sodium hydroxide | 0.05 |
| 5 | Polyamine polymer | 0.1 |
| 6 | Water | 100 |
Field application test result: the drilling fluid prepared by embodiment 1-3, on-the-spot application is carried out in the northern white 44 piece of one band well of Zhongyuan Oil Field Dong-pu Depression Baimiao structure main body, institute's drilling well is the most all more than more than 4,000 meters, property of drilling fluid (apparent viscosity, plastic viscosity, yield value, first egress, filter loss, pH value etc.) is stable, does not all have big change；The strong rejection capability of system restrained effectively the aquation dispersion pulping of mud shale drilling cuttings, falls block few, without collapsing, does not has down hole problem to occur；Orientation and compound drilling are all normal, make a trip unimpeded, are drilled into well depth more than 4,000 meter smoothly.Drifting process is without blocked portion phenomenon, and drilling tool conveying electrical measurement once success, setting of casing and well cementing operation are smooth.
Comparative example 1
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.
Comparative example is 4038m in the northern white 44 pieces of Bai of Zhongyuan Oil Field Dong-pu Depression Baimiao structure main body-flat 2HF well scene application time institute's drilling well deeply, and in drilling process, borehole wall stability is poor, and the block that collapses is serious.Creeping into well depth 3987m, complex situations occur, time have chance card, suppress pump phenomenon, successively on carry to 210t, 170T, 180T and carrying out.Have during unfreezing Posterior circle little fall block return out, there is no when pushing away with drip thick paste and big fall block out.Well depth 4038m, because down-hole is complicated, pulls out of hole and simplifies structure, lower rifler drifting, under get into the end after return out and fall block in a large number, caving control effect is limited.
Claims (5)
1. a drilling fluid, it is characterised in that: count by weight, containing the bentonite of 2.0-6.0 part, 0.1-1 part sodium carboxymethyl cellulose, 0.2-0.8 part amphoteric sulfonated copolymer, 0.03-0.4 part sodium hydroxide, 0.1-0.8 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 is 0.75 mmol/g-3.6 mmol/g, and preparing 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: count by weight, containing the bentonite of 3.0-5.0 part, 0.3-0.7 part sodium carboxymethyl cellulose, 0.2-0.6 part amphoteric sulfonated copolymer, 0.05-0.2 part sodium hydroxide, 0.1-0.5 part polyamine polymer.
Drilling fluid the most according to claim 1 and 2, it is characterised in that: described polyamine polymer kinematic viscosity is 500 mm2/s -1300
mm2/ s, cationic degree is 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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