CN103013465A - Polyhydroxy-structure emulsifier and oil-base drilling fluid containing same - Google Patents
Polyhydroxy-structure emulsifier and oil-base drilling fluid containing same Download PDFInfo
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- CN103013465A CN103013465A CN2012105802654A CN201210580265A CN103013465A CN 103013465 A CN103013465 A CN 103013465A CN 2012105802654 A CN2012105802654 A CN 2012105802654A CN 201210580265 A CN201210580265 A CN 201210580265A CN 103013465 A CN103013465 A CN 103013465A
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Abstract
The invention discloses a polyhydroxy-structure emulsifier and an oil-base drilling fluid containing the same. The drilling fluid comprises 60-90 wt% of base oil and 10-40 wt% of brine, and also comprises 0.5-1.2% of emulsifier, 0.5-0.8% of reverse wetting agent, 2.0-3.0% of calcium oxide, 1.5-2.5% of organic soil, and 2.0-3.0% of fluid loss agent and weighting material on the basis of the total weight of the base oil and brine, wherein the density of the drilling fluid reaches 1.1-2.3g/cm<3> after adding the weighting material. The emulsifier has excellent reversed emulsifying property and lubricating property, can be used for a long time under the conditions of wide oil-water ratio range (60:40-95:5) and wide temperature range (150-220 DEG C), and has high emulsifying stability and high-temperature stability. The drilling fluid has favorable electrical stability and system stability in the high-water-content oil state, and has favorable flowability in the high density state.
Description
Technical field
The present invention relates to the drilling technique field, particularly relate to a kind of poly-hydroxy structure emulsifying agent and contain the oil base drilling fluid of this emulsifying agent.
Background technology
As the key components of oil base drilling fluid system, emulsifying agent plays vital effect.Whether oil base drilling fluid is stable, depends on to a great extent the reasonable use of emulsifying agent.The Main Function of emulsifying agent is: reduce firm interfacial film and the outer phase viscosity of increase of interfacial tension, formation between two kinds of liquid of profit.For now, the emulsifying agent for the oil base drilling fluid system is generally: the soap salt of carboxylic acid, the soap salt of sulfonic acid, organic acid acetic, amine salt etc.More than several emulsifying agent resistances to elevated temperatures limited, although in use procedure addition high poor effect, do not have technical superiority.
Summary of the invention
The technical problem to be solved in the present invention provides that a kind of addition is few, the poly-hydroxy emulsifying agent of the oil base drilling fluid of emulsify well.
Second purpose of the present invention provides the drilling fluid that contains mentioned emulsifier.
The 3rd purpose of the present invention provides above-mentioned drilling fluid preparation method.
For this reason, technical scheme of the present invention is as follows:
A kind of poly-hydroxy structure emulsifying agent, it has following structure:
R
1-(CH
2-CH
2)
n-C(OH)-(CH
2)
m-C(O)-OCH
2-CH(O-C(O)-R
2)-CH
2O-C(O)-(CH
2)
m-CH(OH)R
3，
Wherein: R
1, R
3Be alkyl or the monoene alkyl of C15～C21,
R
2Be alkyl, monoene alkyl or the diene alkyl of hydrogen or C12～C22,
N is 1～3 integer; M is 1～4 integer,
The hydroxyl value of described emulsifying agent is 50～87mg KOH/g, and acid number is 5～50mg KOH/g.
A kind of derived from coconut, cottonseed, castor-oil plant, Semen Brassicae campestris, soybean, palm, peanut and the tallol of fatty acid ester in the mentioned emulsifier, or any two or more mixture in them, in the mixture each component with any than mixing.
A kind of drilling fluid that contains above-mentioned poly-hydroxy structure emulsifying agent, comprise: the base oil of 60～90wt% and the salt solution of 10～40wt% and in 0.5～1.2% emulsifying agent of the gross weight of described base oil and water, 0.5～0.8% reverse wetting agent, 2.0～3.0% calcium oxide, 1.5～2.5% organophilic clay, 2.0～3.0% fluid loss agent and high-density weighting material, the add-on of described high-density weighting material is so that the density of this drilling fluid is 1.1～2.3g/cm
3
In described drilling fluid, described base oil is diesel oil, low toxicity white mineral oil.In an embodiment of the present invention, described low toxicity white mineral oil adopts 4# or the 5# white oil that Maoming petrochemical industry project company limited produces;
Described salt solution is a kind of in sodium-chlor, calcium chloride, the potassium chloride solution, and the concentration of the described aqueous solution is 10 ~ 40wt%;
Described reverse wetting agent is vegetables oil acid amides or Yatall MA acid amides;
Described organophilic clay: the quaternized products of montmorillonite;
Described fluid loss agent is valchovite, in an embodiment of the present invention, employing be that Bohai Sea drilling project company limited Mud Technology is served the modification brown coal that branch office produces;
Described high-density weighting material is a kind of or any two kinds combination in Wingdale, barite, the rhombohedral iron ore, and when adopting two kinds combination, described two kinds of high-density weighting materials mix with any ratio.
Emulsifying agent of the present invention is a kind of oxypolymerization fatty acid ester, and it is by the polymer after the polymerization of fatty acid ester process deep oxidation, has extraordinary chemical stability and thermotolerance; Owing to have a plurality of hydroxyls and carboxyl in its molecule, therefore have excellent especially rp-emulsification performance and lubricity.The type emulsifying agent can at 60:40 to 95:5 life-time service in water oil ratio and 150～220 ℃ of temperature ranges on a large scale, have excellent emulsifying stability and high-temperature stability.Drilling fluid of the present invention has good elctrical stability and system stability under highly aqueous state, have good flowability under high-density state.
Embodiment
Below in conjunction with embodiment emulsifying agent of the present invention and the drilling fluid that contains this emulsifying agent are elaborated.
Emulsifying agent of the present invention has following chemical structural formula:
R
1-(CH
2-CH
2)
n-C(OH)-(CH
2)
m-C(O)-OCH
2-CH(O-C(O)-R
2)-CH
2O-C(O)-(CH
2)
m-CH(OH)R
3
R wherein
1, R
3Be C
15～C
21Alkane or monoolefine, R
2Be hydrogen or C
12～C
22Alkane, monoolefine or diolefin, the n value is that 1～3, m value is 1～4.
Mentioned emulsifier is a kind of oxypolymerization fatty acid ester, at room temperature is liquid and does not need to add solvent, and its hydroxyl value is 50～87, and acid number is 5～50.A kind of in Oleum Cocois, Oleum Gossypii semen, Viscotrol C, rapeseed oil, soybean oil, plam oil, peanut oil or tallol of used fatty acid derived, or in them arbitrarily two or more with any mixture than forming.
Adopt vegetables oil and air under 200-220 ℃, 5-15Mpa, to carry out fatty acid ester oxypolymerization, the polymerization of partial fatty acid ester segment, part is easily decomposed the segment fracture, forms the oxidation soybean grease of molecular weight in 1000 ~ 5000Da scope, as oil base drilling fluid emulsifying agent of the present invention.
According to the listed proportioning of following table, preparation contains the drilling fluid of mentioned emulsifier as follows:
Annotate: 1#, 2#, 3# emulsifying agent are respectively oxypolymerization tallol, oxypolymerization soybean oil and oxypolymerization rapeseed oil in the table.
The preparation method:
(1) under high-speed stirring, in described base oil, add described emulsifying agent, stirred 10 minutes;
(2) under high-speed stirring, according to adding described salt solution, stirred 30 minutes;
(3) under high-speed stirring, add successively described calcium oxide, organophilic clay and fluid loss agent, stirred 30 minutes;
(4) under high-speed stirring, the high-density weighting material by described drilling fluid final densities adding respective amount stirred 30 minutes.
Stirring velocity in above-mentioned steps (1)～(4) is 10000 ~ 12000 rev/mins.
The performance of drilling fluid after 180 ℃ of heat are rolled that above-mentioned 3 embodiment make is as follows:
| ? | Density (g/cm 3) | PV(mPa·s) | YP(Pa) | ES（V） | FL·HTHP(ml) |
| Embodiment 1 | 1.17 | 30 | 14 | 608 | 4.7 |
| Embodiment 2 | 1.75 | 52 | 25 | 1200 | 3.6 |
| Embodiment 3 | 2.05 | 59 | 33 | 2000 | 4.8 |
In upper table, PV is plastic viscosity; YP is yield value; ES is emulsion-breaking voltage; FLHTHP is high temperature and high pre ssure filtration.
By data in the table as can be known: 1) water oil ratio is that 60:40, density are 1.17g/cm
3Oil base drilling fluid heat roll rear emulsion-breaking voltage more than 600V, high temperature and high pre ssure filtration is 4.7ml; 2) water oil ratio is that 70:30, density are 1.75g/cm
3Oil base drilling fluid heat roll rear emulsion-breaking voltage more than 1200V, have good elctrical stability; Its high temperature and high pre ssure filtration is 3.6ml, the system stable performance; 3) water oil ratio is that 85:15, density are 2.05g/cm
3Oil base drilling fluid heat to roll rear apparent viscosity be 59mPas, yield value is 33Pa, has good dispersed and mobile.And traditional oil base drilling fluid is 1.5% at the organophilic clay dosage, and density is 2.0g/cm
3Mostly more than 80mPas, flowability is significantly smaller than oil base drilling fluid of the present invention to plastic viscosity during the left and right sides.
Claims (9)
1. poly-hydroxy structure emulsifying agent, it has following structure:
R
1-(CH
2-CH
2)
n-C(OH)-(CH
2)
m-C(O)-OCH
2-CH(O-C(O)-R
2)-CH
2O-C(O)-(CH
2)
m-CH(OH)R
3，
Wherein: R
1, R
3Be alkyl or the monoene alkyl of C15～C21,
R
2Be alkyl, monoene alkyl or the diene alkyl of hydrogen or C12～C22,
N is 1～3 integer; M is 1～4 integer,
The hydroxyl value of described emulsifying agent is 50～87mg KOH/g, and acid number is 5～50mg KOH/g.
2. poly-hydroxy structure emulsifying agent according to claim 1, it is characterized in that: a kind of derived from coconut, cottonseed, castor-oil plant, Semen Brassicae campestris, soybean, palm, peanut and the tallol of the fatty acid ester in the described emulsifying agent, or any two or more mixture in them, in the mixture each component with any than mixing.
3. drilling fluid that contains claim 1 or 2 described poly-hydroxy structure emulsifying agents, it is characterized in that: comprise the salt solution of the base oil of 60～90wt% and 10～40wt% and in 0.5～1.2% emulsifying agent of the gross weight of described base oil and salt solution, 0.5～0.8% reverse wetting agent, 2.0～3.0% calcium oxide, 1.5～2.5% organophilic clay, 2.0～3.0% fluid loss agent and high-density weighting material, the add-on of described high-density weighting material is so that the density of this drilling fluid is 1.1～2.3g/cm
3
4. drilling fluid according to claim 3 is characterized in that: described base oil is a kind of in diesel oil, the low toxicity white mineral oil.
5. drilling fluid according to claim 3 is characterized in that: described salt solution is a kind of in sodium-chlor, calcium chloride, the potassium chloride solution, and the concentration of described salt solution is 20 ~ 40wt%.
6. drilling fluid according to claim 3, it is characterized in that: described reverse wetting agent is vegetables oil acid amides or Yatall MA acid amides.
7. drilling fluid according to claim 3, it is characterized in that: described organophilic clay is the quaternized products of montmorillonite.
8. drilling fluid according to claim 3, it is characterized in that: described fluid loss agent is valchovite.
9. described high-density weighting material is a kind of or any two kinds combination in Wingdale, barite, the rhombohedral iron ore, and when adopting two kinds combination, described two kinds of high-density weighting materials mix with any ratio.
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103923623A (en) * | 2014-04-03 | 2014-07-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Oil-based drilling fluid |
| CN104232036A (en) * | 2013-06-17 | 2014-12-24 | 中国石油化工股份有限公司 | Oil base drilling fluid and preparation method thereof |
| CN104497999A (en) * | 2014-12-31 | 2015-04-08 | 中国石油天然气集团公司 | Plant oil-based drilling fluid and preparation method thereof |
| CN105368414A (en) * | 2015-11-26 | 2016-03-02 | 天津滨海新区普瑞德石油科技有限公司 | Wetting reversion agent composition and preparation method therefor |
| CN105874153A (en) * | 2013-11-19 | 2016-08-17 | 佐治亚-太平洋化工品有限公司 | Modified hydrocarbon resins as fluid loss additives |
| CN105907382A (en) * | 2016-05-13 | 2016-08-31 | 中国石油集团长城钻探工程有限公司钻井液公司 | Emulsifying agent based on oil-based drilling fluid and preparation method thereof |
| CN110746944A (en) * | 2019-11-15 | 2020-02-04 | 中国石油集团渤海钻探工程有限公司 | Flow pattern regulator for synthetic base drilling fluid and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232036A (en) * | 2013-06-17 | 2014-12-24 | 中国石油化工股份有限公司 | Oil base drilling fluid and preparation method thereof |
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| CN105874153A (en) * | 2013-11-19 | 2016-08-17 | 佐治亚-太平洋化工品有限公司 | Modified hydrocarbon resins as fluid loss additives |
| CN105874153B (en) * | 2013-11-19 | 2019-04-30 | 佐治亚-太平洋化工品有限公司 | The hydrocarbon resin of modification as fluid loss additive |
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| CN104497999A (en) * | 2014-12-31 | 2015-04-08 | 中国石油天然气集团公司 | Plant oil-based drilling fluid and preparation method thereof |
| CN105368414A (en) * | 2015-11-26 | 2016-03-02 | 天津滨海新区普瑞德石油科技有限公司 | Wetting reversion agent composition and preparation method therefor |
| CN105907382A (en) * | 2016-05-13 | 2016-08-31 | 中国石油集团长城钻探工程有限公司钻井液公司 | Emulsifying agent based on oil-based drilling fluid and preparation method thereof |
| CN105907382B (en) * | 2016-05-13 | 2018-08-28 | 中国石油集团长城钻探工程有限公司钻井液公司 | A kind of emulsifier and preparation method thereof based on oil base drilling fluid |
| CN110746944A (en) * | 2019-11-15 | 2020-02-04 | 中国石油集团渤海钻探工程有限公司 | Flow pattern regulator for synthetic base drilling fluid and preparation method thereof |
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| CN103013465B (en) | 2014-11-05 |
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Effective date of registration: 20201222 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106, Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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