CN102863584A - Preparation method for macromolecule emulsion coating agent for drilling fluid - Google Patents
Preparation method for macromolecule emulsion coating agent for drilling fluid Download PDFInfo
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- CN102863584A CN102863584A CN2012103751605A CN201210375160A CN102863584A CN 102863584 A CN102863584 A CN 102863584A CN 2012103751605 A CN2012103751605 A CN 2012103751605A CN 201210375160 A CN201210375160 A CN 201210375160A CN 102863584 A CN102863584 A CN 102863584A
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- aqueous solution
- acrylamide
- drilling fluid
- coating agent
- emulsion coating
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Abstract
The invention discloses a preparation method for a macromolecule emulsion coating agent for a drilling fluid. The mass ratio of a potassium acrylate aqueous solution, a 2-acrylamide-2-methpropanesulfonic acid potassium salt aqueous solution, a 50% acrylamide aqueous solution, white oil, an emulsifying agent SP-80 and a 8% ethylene diamine tetraacetic acid (EDTA) aqueous solution is (25-30): (5-10): (30-40): (23-28): (2.5-3.0): (0.5-1.0). The potassium acrylate aqueous solution, the 2-acrylamide-2-methpropanesulfonic acid potassium salt aqueous solution, the 50% acrylamide aqueous solution, the white oil, the emulsifying agent SP-80 and the 8% ethylene diamine tetraacetic acid (EDTA) aqueous solution are emulsified in a reacting kettle, the reacting kettle is placed in water bath to be subjected to water-bath heating until the temperature reaches to 40 DEG C, and 0.5%o hydrogen peroxide is dropwise added in the reacting kettle until the reaction is finished. The macromolecule emulsion coating agent prepared by the method has the advantages that the macromolecule emulsion coating agent has good coating capability, inhibitive capability, thermostability, salt-resistant and anti-pollution capabilities and lubricating capacity, the coefficient of friction resistance of a mud cake can be effectively reduced, the emulsion particle size is equal to the size of general pore space of low-permeability and ultra-low permeability oil fields, the plugging is effective, the protective effect on an oil layer is evident, the discharge is easy, damage to the oil layer is absent, and the macromolecule emulsion coating agent is suitable for water base and oil base drilling fluid systems.
Description
Technical field
The present invention relates to a kind of drilling fluid preparation method of macromolecule emulsion coating agent.
Background technology
Development along with drilling technique, high angle hole, horizontal well, expansion well, extended reach well, and the various highly difficult well locations such as directional inclination well also in continuous increase, to stabilizing borehole, prevent from caving in, suppress the aspects such as the drilling cuttings aquation is disperseed, raising drilling speed higher requirement has also been arranged.Original conventional coating agent can not satisfy the requirement of site operation.
Summary of the invention
Technical problem to be solved by this invention provides the preparation method that a kind of drilling fluid is used the macromolecule emulsion coating agent; Its rejection of macromolecule emulsion coating agent, the lubricity that make are good, Heat stability is good, non-environmental-pollution.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions:
A kind of drilling fluid preparation method of macromolecule emulsion coating agent may further comprise the steps:
(1) raw material is prepared: be no more than in temperature under 35 ℃ the condition, use 50%(wt%) potassium hydroxide transfers to 8.5 with acrylic acid pH value to form the potassium acrylate aqueous solution for subsequent use, get the 2-acrylamide-2-methyl propane sulfonic and be mixed with 50%(wt%) the aqueous solution and use 50%(wt%) that the pH value is transferred to the 8.5 formation 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution is for subsequent use for potassium hydroxide, get acrylamide and be mixed with 50%(wt%) the aqueous solution for subsequent use;
(2) with the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50%(wt%) acrylamide solution, white oil, emulsifying agent SP-80,8%(wt%) the EDTA aqueous solution is that the ratio of 25 ~ 30:5 ~ 10:30 ~ 40:23 ~ 28:2.5 ~ 3.0:0.5～1.0 adds in the reactor in mass ratio;
(3) with nitrogen the air in the reactor is driven out of, turn on agitator, rapid stirring carries out emulsification;
(4) emulsification complete after, reactor is put into the water-bath heating in water bath;
(5) when the feed temperature in the reactor rises to 40 ℃, stopped heating drips 5/10000ths hydrogen peroxide in reactor, add 2 for the first time, observe feed temperature rising situation, use simultaneously the whether wire drawing of dried doigte feed liquid, such as wire drawing, then when feed temperature no longer rises, add again 4 hydrogen peroxide, with the whether wire drawing of dried doigte feed liquid, the like strengthen gradually the addition of hydrogen peroxide, by the time temperature no longer rise and feed liquid no longer during wire drawing reaction finish.
Above-mentioned drilling fluid adds the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50%(wt% in the described reactor with the preparation method of macromolecule emulsion coating agent) mass ratio of acrylamide solution, white oil, emulsifying agent SP-80, the 8%EDTA aqueous solution is 28:7.5:35:26:2.8:0.7.
The drilling fluid of method preparation of the present invention has the following advantages with the macromolecule emulsion coating agent:
1) increasing considerably of molecular weight improved coated property, inhibition, thermostability and the anti-salt pollution ability of product, and drilling fluid rheology is improved greatly;
2) high molecular weight, the adsorption group of suitable proportion, the synergy of aquation group and cation group, make the macromolecule emulsion coating agent have good rheological, building capacity and caving-preventing ability, good coated property, inhibition and anti-salt pollution ability and certain thermostability and leak-off controllability;
3) contain a large amount of drilling fluid lubricating compositions, have good lubricity, alternative oil lubricant can effectively reduce the coefficient of friction resistance of mud cake;
4) the emulsion granularity is little, and is basic with hypotonic identical with the general pore dimension Oil in Super-low Permeability oil field, is easy to be squeezed in the nano level space form shutoff, so shutoff is more effective, the oil layer protection effect is obvious;
5) this product is easy to use, can be directly used in situ of drilling well preparation drilling fluid, is applicable to water base, oil base drilling fluid system;
6) because emulsion is Water in Oil emulsion, the risk that does not exist emulsion to stop up is easy to anti-row, can not damage oil reservoir.
Embodiment
For clearer explanation technical scheme of the present invention, below specific embodiment the present invention will be further described in detail.
The drilling fluid of the present invention preparation method of macromolecule emulsion coating agent may further comprise the steps:
(1) raw material is prepared: be no more than in temperature under 35 ℃ the condition, use 50%(wt%) potassium hydroxide transfers to 8.5 with acrylic acid pH value to form the potassium acrylate aqueous solution for subsequent use, get the 2-acrylamide-2-methyl propane sulfonic and be mixed with 50%(wt%) the aqueous solution and use 50%(wt%) that the pH value is transferred to the 8.5 formation 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution is for subsequent use for potassium hydroxide; get acrylamide and be mixed with 50%(wt%) the aqueous solution for subsequent use
(2) with the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50%(wt%) acrylamide solution, white oil, emulsifying agent SP-80,8%(wt%) the EDTA aqueous solution is that the ratio of 25 ~ 30:5 ~ 10:30 ~ 40:23 ~ 28:2.5 ~ 3.0:0.5～1.0 adds in the reactor in mass ratio;
(3) with nitrogen the air in the reactor is driven out of, turn on agitator, rapid stirring carries out emulsification;
(4) emulsification complete after, reactor is put into the water-bath heating in water bath;
(5) when the feed temperature in the reactor rises to 40 ℃, stopped heating drips 5/10000ths hydrogen peroxide in reactor, add 2 for the first time, observe feed temperature rising situation, use simultaneously the whether wire drawing of dried doigte feed liquid, such as wire drawing, then when feed temperature no longer rises, add again 4 hydrogen peroxide, with the whether wire drawing of dried doigte feed liquid, the like strengthen gradually the addition of hydrogen peroxide, by the time temperature no longer rise and feed liquid no longer during wire drawing reaction finish.
Preferably, adding the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50% acrylamide solution, white oil, emulsifying agent SP-80,8%(wt% in the described reactor) mass ratio of the EDTA aqueous solution is 28:7.5:35:26:2.8:0.7.
1. the drilling fluid of method of the present invention preparation is with macromolecule emulsion coating agent performance evaluation:
Fresh water experimental formula: 4% base slurry+1% drilling fluid macromolecule emulsion coating agent.
Described 4% base slurry is made the base slurry through 24 hours aquations at ambient temperature for adding 4 gram sodium bentonites in per 100 ml waters.Described 1% drilling fluid is in the quality percent by volume with the macromolecule emulsion coating agent, namely adds 1 gram drilling fluid macromolecule emulsion coating agent in per 100 milliliters of base slurries.
Be recycled to respectively in the digestion tank by 1% drilling fluid that is added with that the fresh water experimental formula configures with the drilling fluid (the abbreviation application of sample is starched) of macromolecule emulsion coating agent two part of 4% base slurry and two parts, under 180 ℃ of conditions heat roll 16h(be reduced to 180 ℃/16h), after drilling fluid is cooled to room temperature, be recycled in the clean mud cup; Add while stirring the 20.0g sodium bentonite, continue to stir 10min, put into roller heating stove behind the curing in airtight condition 3h, roll 16h in 180 ℃ of lower heat, treat that drilling fluid is cooled to room temperature, high-speed stirring 5min adds apparent viscosity AV and the yield value YP that 4% base slurry behind the sodium bentonite and application of sample are starched by the measuring method test of GB/T16783 regulation, and apparent viscosity is designated as respectively AV
1, AV
2, the yield value value of reading is designated as respectively YP
1, YP
2Molecular weight determination is with reference to GB.Calculate apparent viscosity degradation rate and yield value rate of descent by formula (1), formula (2).The indices that application of sample slurry heat under 180 ℃ of conditions is rolled before and after the 16h is as shown in table 1, and apparent viscosity rate of descent and the yield value rate of descent of application of sample slurry after heat under 180 ℃ of conditions is rolled 16h sees Table 2.
Table 1 application of sample slurry heat under 180 ℃ of conditions is rolled the indices before and after the 16h
| Project | Index | The result |
| Outward appearance | White or milky emulsion | Milky emulsion |
| Non-water thing content, % | ≥55 | 77.56 |
| Application of sample slurry apparent viscosity, mPa.s | ≥30 | 54.5 |
| The pH value | 6.5-7.5 | 7 |
Apparent viscosity rate of descent and the yield value rate of descent of table 2 application of sample slurry after heat under 180 ℃ of conditions is rolled 16h
| Project | Index behind the 180 ℃/16h | The result |
| Apparent viscosity rate of descent % | ≥50 | 56.3 |
| Yield value rate of descent % | ≥65 | 76.3 |
Experimental data according to record in table 1, the table 2 shows: be added with 1% drilling fluid with the requirement that can touch the mark fully of the drilling fluid of macromolecule emulsion coating agent under 180 ℃ of conditions, and have good inhibition.
2. the drilling fluid of preparation method's preparation of the present invention is tested with the performance comparison of macromolecule emulsion coating agent and other coating agents:
The drilling fluid that adopts respectively preparation method of the present invention preparation with macromolecule emulsion coating agent, 80A51, CAL-90 and emulsion coating agent by following formulated drilling fluid, experimental formula and number as follows:
1.4% base slurry+1% drilling fluid macromolecule emulsion coating agent
2.4% base slurry+0.3%80A51
3.4% base slurry+1%CAL-90
4.4% base slurry+1% emulsion coating agent
Annotate, all refer to the quality percent by volume.
After tested, the apparent viscosity rate of descent of the drill-in fluid of four kinds of prescriptions of 1-4 and yield value rate of descent see Table 3;
Apparent viscosity rate of descent and the yield value rate of descent of the drilling fluid of the different coating agent preparations of table 3
Drawn by just data in 3: the drilling fluid of method preparation of the present invention obviously is being better than other like products with the macromolecule emulsion coating agent aspect the inhibition clay dispersion.
3. the drilling fluid of method of the present invention preparation detects with macromolecule emulsion coating agent anti-salt property, fills a prescription and numbers following (with the metering of quality percent by volume), and test result sees Table 4.
1.4% base slurry+1% drilling fluid macromolecule emulsion coating agent
2.4% base slurry+1% drilling fluid macromolecule emulsion coating agent+5%NaCl
3.4% base slurry+1% drilling fluid macromolecule emulsion coating agent+10%NaCl
The table 4 drilling fluid salt resistance of macromolecule emulsion coating agent
Data from table 4 draw, and the drilling fluid of method preparation of the present invention still has good inhibition with the macromolecule emulsion coating agent in the base slurry that is polluted by 10%NaCl, although fluid loss increases to some extent, do not affect the overall performance of drilling fluid.
4. the drilling fluid application of macromolecule emulsion coating agent in drilling fluid of method preparation of the present invention:
It is as follows to fill a prescription, and test data sees Table 5.
Drilling fluid basic recipe: 5% wilkinite+0.2% organic silicon diluent SF-260+2.3% polyester plugging agent JJFT-1+0.1% soda ash+0.1% potassium hydroxide+1%HCE+5%HCO
Experimental formula (with the metering of quality percent by volume):
1. drilling fluid basic recipe+0.1% drilling fluid macromolecule emulsion coating agent
2. drilling fluid basic recipe+0.3% drilling fluid macromolecule emulsion coating agent
3. drilling fluid basic recipe+0.5% drilling fluid macromolecule emulsion coating agent
4. drilling fluid basic recipe+0.7% drilling fluid macromolecule emulsion coating agent
The application of macromolecule emulsion coating agent in system of table 5 drilling fluid
Test data in the table 5 can draw: the drilling fluid of method preparation of the present invention reduces fluid loss, reduction lubricating coefficient, the raising inhibition of drilling fluid system to a certain extent in drilling fluid with the macromolecule emulsion coating agent, simultaneously along with the increase of described drilling fluid with macromolecule emulsion coating agent dosage, the viscosity of drilling fluid also increases to some extent, in practice of construction, increase as one feels fit addition according to practical situation.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For one of ordinary skill in the art, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still belong to the protection domain of the invention.
Claims (2)
1. the preparation method of a drilling fluid usefulness macromolecule emulsion coating agent is characterized in that, may further comprise the steps:
(1) raw material is prepared: be no more than in temperature under 35 ℃ the condition, use 50%(wt%) potassium hydroxide transfers to 8.5 with acrylic acid pH value to form the potassium acrylate aqueous solution for subsequent use, get the 2-acrylamide-2-methyl propane sulfonic and be mixed with 50%(wt%) the aqueous solution and use 50%(wt%) that the pH value is transferred to the 8.5 formation 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution is for subsequent use for potassium hydroxide, get acrylamide and be mixed with 50%(wt%) the aqueous solution for subsequent use;
(2) with the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50%(wt%) acrylamide solution, white oil, emulsifying agent SP-80,8%(wt%) the EDTA aqueous solution is that the ratio of 25 ~ 30:5 ~ 10:30 ~ 40:23 ~ 28:2.5 ~ 3.0:0.5 ~ 1.0 adds in the reactor in mass ratio;
(3) with nitrogen the air in the reactor is driven out of, turn on agitator, rapid stirring carries out emulsification;
(4) emulsification complete after, reactor is put into the water-bath heating in water bath;
(5) when the feed temperature in the reactor rises to 40 ℃, stopped heating drips 5/10000ths hydrogen peroxide in reactor, add 2 for the first time, observe feed temperature rising situation, use simultaneously the whether wire drawing of dried doigte feed liquid, such as wire drawing, then when feed temperature no longer rises, add again 4 hydrogen peroxide, with the whether wire drawing of dried doigte feed liquid, the like strengthen gradually the addition of hydrogen peroxide, by the time temperature no longer rise and feed liquid no longer during wire drawing reaction finish.
2. drilling fluid according to claim 1 is with the preparation method of macromolecule emulsion coating agent, it is characterized in that, add the potassium acrylate aqueous solution, the 2-acrylamide-2-methyl propane sulfonic sylvite aqueous solution, 50%(wt% in the described reactor) mass ratio of acrylamide solution, white oil, emulsifying agent SP-80, the 8%EDTA aqueous solution is 28:7.5:35:26:2.8:0.7.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103724517A (en) * | 2013-12-04 | 2014-04-16 | 克拉玛依市金鑫科技有限公司 | Production method of tackifying encapsulation agent for drilling fluid |
| CN103755868A (en) * | 2013-12-23 | 2014-04-30 | 郑州三山石油技术有限公司 | Resistance reducing agent for fracturing quick water of shale gas and preparation method thereof |
| CN103755869A (en) * | 2014-01-03 | 2014-04-30 | 克拉玛依市金鑫科技有限公司 | AM/AAK/AMPS terpolymer and polymer emulsion strong coating agent as well as preparation methods thereof |
| CN104177542A (en) * | 2014-08-05 | 2014-12-03 | 新乡市富邦科技有限公司 | Microemulsion polymerization strong coater for drilling fluid and preparation method of strong coater |
| CN104559962A (en) * | 2013-12-06 | 2015-04-29 | 崇礼县石油科技有限公司 | Polybasic coating inhibitor for drilling fluid and preparation method thereof |
| CN105294946A (en) * | 2015-11-26 | 2016-02-03 | 天津滨海新区普瑞德石油科技有限公司 | Coating agent for water-based drilling fluid |
| CN107488247A (en) * | 2017-08-25 | 2017-12-19 | 江苏师范大学 | A kind of preparation method of polymer for drilling fluid shale control agent |
| CN109021941A (en) * | 2018-09-20 | 2018-12-18 | 河北硅谷化工有限公司 | Drilling fluid flocculant |
| CN110684514A (en) * | 2019-12-09 | 2020-01-14 | 东营市金美化工有限公司 | Coating agent for drilling fluid and microemulsion preparation method and application thereof |
| CN111978464A (en) * | 2020-08-26 | 2020-11-24 | 中石化石油工程技术服务有限公司 | Polyacrylamide potassium salt and preparation method and application thereof |
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| CN103724517A (en) * | 2013-12-04 | 2014-04-16 | 克拉玛依市金鑫科技有限公司 | Production method of tackifying encapsulation agent for drilling fluid |
| CN104559962A (en) * | 2013-12-06 | 2015-04-29 | 崇礼县石油科技有限公司 | Polybasic coating inhibitor for drilling fluid and preparation method thereof |
| CN103755868A (en) * | 2013-12-23 | 2014-04-30 | 郑州三山石油技术有限公司 | Resistance reducing agent for fracturing quick water of shale gas and preparation method thereof |
| CN103755868B (en) * | 2013-12-23 | 2016-06-08 | 郑州三山石油技术有限公司 | Shale gas slippery water pressure break friction reducer and preparation method thereof |
| CN103755869B (en) * | 2014-01-03 | 2016-04-06 | 克拉玛依市金鑫科技有限公司 | AM/AAK/AMPS terpolymer and the strong coating agent of polymer emulsion and preparation method thereof |
| CN103755869A (en) * | 2014-01-03 | 2014-04-30 | 克拉玛依市金鑫科技有限公司 | AM/AAK/AMPS terpolymer and polymer emulsion strong coating agent as well as preparation methods thereof |
| CN104177542A (en) * | 2014-08-05 | 2014-12-03 | 新乡市富邦科技有限公司 | Microemulsion polymerization strong coater for drilling fluid and preparation method of strong coater |
| CN104177542B (en) * | 2014-08-05 | 2016-09-14 | 新乡市富邦科技有限公司 | Strong coating agent of drilling fluid micro-emulsion polymerization and preparation method thereof |
| CN105294946A (en) * | 2015-11-26 | 2016-02-03 | 天津滨海新区普瑞德石油科技有限公司 | Coating agent for water-based drilling fluid |
| CN107488247A (en) * | 2017-08-25 | 2017-12-19 | 江苏师范大学 | A kind of preparation method of polymer for drilling fluid shale control agent |
| CN107488247B (en) * | 2017-08-25 | 2019-08-16 | 江苏师范大学 | A kind of preparation method of polymer for drilling fluid shale control agent |
| CN109021941A (en) * | 2018-09-20 | 2018-12-18 | 河北硅谷化工有限公司 | Drilling fluid flocculant |
| CN109021941B (en) * | 2018-09-20 | 2022-01-18 | 河北硅谷化工有限公司 | Coating flocculant for drilling fluid |
| CN110684514A (en) * | 2019-12-09 | 2020-01-14 | 东营市金美化工有限公司 | Coating agent for drilling fluid and microemulsion preparation method and application thereof |
| CN111978464A (en) * | 2020-08-26 | 2020-11-24 | 中石化石油工程技术服务有限公司 | Polyacrylamide potassium salt and preparation method and application thereof |
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