CN104650833A - Oil-in-water emulsion drilling fluid and preparation method thereof - Google Patents
Oil-in-water emulsion drilling fluid and preparation method thereof Download PDFInfo
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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
- C09K8/26—Oil-in-water emulsions
- C09K8/265—Oil-in-water emulsions containing inorganic additives
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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
- C09K8/26—Oil-in-water emulsions
- C09K8/28—Oil-in-water emulsions containing organic additives
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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
- C09K2208/34—Lubricant additives
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Abstract
The invention discloses an oil-in-water emulsion drilling fluid and a preparation method thereof. According to the oil-in-water emulsion drilling fluid disclosed by the invention, a base fluid is composed of 60-90 parts by volume of a water phase and 10-40 parts by volume of an oil base, wherein the base fluid is added with 0.5-4 parts by mass of bentonite, 0.1-0.5 part by mass of a pH regulator, 0.1-0.3 part by mass of a tackifier, 1-2 parts by mass of an inhibitor, 2-3 parts by mass of a filtrate reducer, 1-3 parts by mass of a blocking agent, 0.5-3.0 parts by mass of an emulsifier, 1-4 parts by mass of a lubricant and 0-710 parts by mass of weighted materials. The drilling fluid is wide in scope of application, and has characteristics of being good in stability, inhibition, lubricity and the like, is strong in high-temperature resistance, not only capable of meeting unbalanced drilling for a low-pressure exhaustion oil-gas layer with a formation pressure coefficient of about 1.0, but also capable of being used for construction of a very conventional oil-gas reservoir horizontal well, wherein a water-oil ratio can change between 90:10 to 60:40, and the density ranges from 0.91g/cm<3> to 2.0g/cm<3>.
Description
Technical field
The present invention relates to a kind of drilling fluid, be specifically related to a kind of oil-in-water emulsified drilling fluid system that petroleum prospecting well and recovery well use in drilling process and preparation method thereof.
Background technology
Along with the exploitation in each oil field, the whole world progresses into the middle and later periods, difficulty and the Oil/gas Well cost of development of drilling operation increase all sharp.As a rule, typical highly difficult well is as hp-ht well, extended reach well, horizontal well and slim hole well, casing program design is complicated, the down hole problem run in drilling well is also more, often runs into the problems such as moment of torsion is excessive, tight trip, bit freezing, rate of penetration are low, borehole well instability.Abroad, the traditional method addressed these problems adopts oil base drilling fluid.Oil base drilling fluid system has that oilness is good, prop-carrying capacity is strong, stability is strong and the feature such as high temperature resistance, antipollution and formation protection; but use oil base drilling fluid system also to bring the problem of cost height and environment protection, the use of oil base drilling fluid receives and limits significantly.Conventional drilling liquid is suppressing to meet the needs that the unconventionaloil pool such as highly difficult well hide exploratory development in shale hydration and drilling fluid lubricating etc.In order to improve the performance of water-base drilling fluid, it is enable to apply at bad ground, the invention discloses a kind of oil-in-water emulsified drilling fluid, both the feature of water-base drilling fluid had been maintained, possessed again the feature of oil base drilling fluid, have the features such as satisfactory stability, inhibition, oilness, temperature resistance is strong, the under-balanced drilling of low pressure exhaustion hydrocarbon zone, reservoir pressure coefficient about 1.0 can be met, can be used for again the construction of normal pressures or unconventionaloil pool Tibetan horizontal well.
The oil-in-water emulsified drilling fluid retrieved is as follows: a kind of compound organic salt-water emulsion drilling fluid (application number: 02132830.7, the applying date: 2002-08-27) disclose one compound organic salt-water emulsion drilling fluid, this kind of drilling fluid with compound organic salt water for base fluid, oil phase is interior phase, add appropriate drilling fluid additive and a small amount of compound emulsifying agent is formulated, the density of this drilling fluid is 0.95-1.07g/cm
3, existing drilling well needs cannot be met.High temperature-resisting oil-in-water drilling fluid (application number: 02102165.1, the applying date: 2002-01-06) discloses a kind of high temperature-resisting oil-in-water drilling fluid, solves the difference of high temperature resistance in drilling process and the large problem of density.It is characterized in that: each composition and proportioning are as follows by weight: emulsifying agent, 55 ~ 30 parts of diesel oil, 2 ~ 4 parts of cationic stablizers and 2 ~ 3 parts of efficient cellulose family water retainings that 1 ~ 2 part of wilkinite, 4 ~ 6 parts of high-temperature resistance are strong are mixed in 30 ~ 55 parts of water.This drilling fluid high temperature resistance can reach 160 DEG C, stable performance, and density is 0.9g/cm
3-0.97g/cm
3, the reservoir that can meet reservoir pressure coefficient about 1.0 implements the requirement of under-balanced drilling.Oil-in-water drilling fluid (the application number: 201110030712.4 of a kind of applicable difference water with slurry and oil, the applying date: 2011-01-28) disclose a kind of applicable difference water with slurry and oily oil-in-water drilling fluid, its formula is: seawater or fresh water 30 ~ 90 parts, oil 70 ~ 10 parts, primary emulsion 2.0 ~ 4.0 parts, auxiliary emulsifying agent 0.2 ~ 0.5 part, fluid loss agent 0.5 ~ 1.5 part, tackifier 0.5 ~ 1 part, high-density weighting material 0 ~ 233 part.This drilling fluid free clay phase, the minimum 0.87g/cm of density
3, be applicable to burial and the under-balanced drilling of low pressure and easy leaking.Above oil-in-water drilling fluid is low density or not argillaceous phase, different from this patent.
In addition, the oil-in-water emulsified drilling fluid of literature search basic composition is water, oil, emulsifying agent, stablizer, its density is substantially at 0.9g/cm
3-1.0g/cm
3, to creep into for low pressure and leakmess formation or underbalance is crept into.
Pertinent literature and the patent of high-density argillaceous phase oil-in-water emulsified drilling fluid do not detected.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and the wide (0.91g/cm of a kind of density range of providing
3-2.0g/cm
3), the novel oil-in-water drilling fluid of argillaceous phase.
Technical scheme of the present invention is: provide a kind of oil-in-water emulsified drilling fluid, this emulsion drilling fluid base fluid is by the aqueous phase of 60-90 volume parts, the oil phase of 10-40 volume parts is formed, wilkinite is added in base fluid, pH adjusting agent, tackifier, inhibitor, fluid loss agent, plugging agent, emulsifying agent, lubricant, high-density weighting material, the mass fraction of additive is as follows: wilkinite 0.5-4 part, pH adjusting agent 0.1-0.5 part, tackifier 0.1-0.3 part, inhibitor 1-2 part, fluid loss agent 2-3 part, plugging agent 1-3 part, emulsifying agent 0.5-3.0 part, lubricant 1-4 part, high-density weighting material 0-710 part, adding of described high-density weighting material makes the density of this drilling fluid be 0.91-2.0g/cm
3.
Described wilkinite is sodium bentonite; PH adjusting agent is the one of sodium hydroxide or sodium carbonate; Described tackifier are xanthan gum XC, Xylo-Mucine CMC, Polyanionic Cellulose PAC mono-kind or its combination of more than two kinds; Described inhibitor is amido inhibitor; Described fluid loss agent is that one or both of high-temperature resisting and salt-resisting fluid loss agent sulfonated phenol formaldehyde resin or modifying asphalt anti-sloughing agent are arbitrarily than mixing; Described plugging agent is the combination of nanoemulsions and calcium carbonate superfine powder, and both are with arbitrarily than mixing; Above-mentioned oil phase is the one in diesel oil, white oil, gas liquefaction; Described emulsifying agent is the mixture of polyoxyethylene sorbitan fatty acid ester, alcohol ether glucoside, and the mass ratio of polyoxyethylene sorbitan fatty acid ester and alcohol ether glucoside is (1-3): 1; Described lubricant is formed through special process is refining by stearic acid, Palmiticacid and oleic acid and additive; Described high-density weighting material is one or both in barite, Wingdale, rhombohedral iron ore, and when employing two kinds, the two is with arbitrarily than mixing.
The present invention has the following advantages:
1, applied range, water-oil ratio can change at 90:10 ~ 60:40, density range 0.91g/cm
3-2.0g/cm
3, the under-balanced drilling of low pressure exhaustion hydrocarbon zone, reservoir pressure coefficient about 1.0 can be met, can be used for again the construction of normal pressures or unconventionaloil pool Tibetan horizontal well;
2, have stronger inhibition, contamination resistance is strong, can be used for the unconventionaloil pool such as turbidite (or dam, beach sand), sand-mud interbed, water-sensitive strata Tibetan the safe and effective of horizontal well and creeps into;
3, temperature resistance can reach 150 DEG C, stabilizing mud properties;
4, oilness is good, effectively can reduce the moment of torsion in drilling well and reduce the complexcase such as blocked portion;
5, seal-off effect is good, can the mud shale microfracture of effective shutoff long horizontal sections.
Embodiment
Just each component is described in detail below:
(1) oil phase uses No. 5, No. 7 white oils, ordinary diesel oil or gas liquefaction;
(2) pH adjusting agent is the one of sodium hydroxide or sodium carbonate;
(3) tackifier select xanthan gum XC, Xylo-Mucine CMC, Polyanionic Cellulose PAC.Xanthan gum XC has good thermostability, high acid-and base-resisting, salt characteristic, and xanthan gum solution has high viscosity under static or low shearing action, show as viscosity and sharply decline, but molecular structure is constant, have filtrate reducing effect concurrently under high shear forces; Xylo-Mucine CMC, Polyanionic Cellulose PAC etc. are as system tackifier, all have filtrate reducing effect concurrently, containing the structure of functional groups such as great amount of hydroxy group-OH, carboxylic acid group-COOH in these middle-molecular-weihydroxyethyl polymkeric substance, clay particle surface can be adsorbed on the one hand and form adsorption layer, the hydration shell thickness increasing borehole wall clay particle is thicker to stop clay particle to flocculate, and is no longer bonded to macrobead, makes the borehole wall form thin and tough mud cake, the permeability reduction of filter cake, improves drilling fluid viscosity simultaneously.
(4) inhibitor used is amido inhibitor, and molecular formula is NH
2(CH
2cHOR) CH
2cHRNH
2, R is the alkyl of 2-8 carbon atom ,-NH
2polarity is large, easily by clay Preferential adsorption, can promote to dewater between clay crystal layer, reduces bulging force; Introduce ehter bond in molecule simultaneously, can suitably increase skeleton carbochain, make it embed clay crystal layer; Rely on the amido fixing clay wafer on molecule, destroy aquation structure, play the effect suppressing mud shale, clay aquation.Product is purchased from Shandong get Shun Yuan Petroleum Technology Co., Ltd;
(5) fluid loss agent select sulfonated phenol formaldehyde resin or modifying asphalt anti-sloughing agent one or both arbitrarily than mixing, these two kinds of fluid loss agents all can high temperature resistance, and by force, these two kinds of fluid loss agents are purchased from Shengli Oil Field Zhong Sheng petrochemical complex company limited to salt tolerance;
(6) plugging agent described in is nanoemulsions, calcium carbonate superfine powder, and both are with arbitrarily than mixing; Calcium carbonate superfine powder plays filling effect to microfracture, and acting synergistically with nanoemulsions to reach the object of shutoff microfracture.Nanoemulsions is purchased from Dongying and wins chemical industry far away, and calcium carbonate superfine powder is purchased from Rieter ultra micro industry (Suzhou) company limited;
(7) emulsifying agent described in is the mixture of polyoxyethylene sorbitan fatty acid ester, alcohol ether glucoside, and the mass ratio of polyoxyethylene sorbitan fatty acid ester and alcohol ether glucoside is (1-3): 1; Polyoxyethylene sorbitan fatty acid ester is purchased from Jiangsu Hai'an Petrochemical Plant, and alcohol ether glucoside is purchased from Hua Xing chemical industry limited liability company of Xinxiang City;
(8) lubricant described in is formed through special process is refining by stearic acid, Palmiticacid and oleic acid and additive, there is good lubricity, significantly can reduce frictional coefficient, firm extreme boundary lubrication film can be formed in the metal surface of drill stem of friction, available protecting effect is play to drilling tool, extend bit life, under minimizing, bore number of times, reduce drilling rod moment of torsion, improve drilling speed, effectively alleviate the wearing and tearing to drilling rod and drill bit, increase substantially drilling efficiency, product is purchased from Pingxiang City Bo Xin Industrial Co., Ltd.;
(9) described high-density weighting material is one or both in barite, Wingdale, rhombohedral iron ore, and when employing two kinds, the two is with arbitrarily than mixing.
(10) preparation method of emulsion drilling fluid, is characterized in that:
Wilkinite, alkali, oil, emulsifying agent, lubricant, tackifier, inhibitor, fluid loss agent, plugging agent is added in proportion in water, high-speed stirring 30-50 minute, finally add high-density weighting material and be adjusted to design density, after high-speed stirring 20-30 minute, namely obtain emulsion drilling fluid.
Embodiment one:
A kind of oil-in-water emulsified drilling fluid is prepared by following prescription:
Get 320 ml waters to be placed in height and to stir cup, add 6 grams of wilkinites, 1.2 grams of sodium carbonate, 80 milliliters of white oils, 6 grams of emulsifier polyoxyethylene sorbitan fatty acid fat, 2 grams of alcohol ether glucosides, 8 grams of lubricants, 1.2 grams of XC, 6 donaxine base inhibitor, 8 grams of sulfonated phenol formaldehyde resins, 4 grams of nanoemulsions, 4 grams of calcium carbonate superfine powders, high-speed stirring 40 minutes, add barite 567 grams of regulating densities again, high-speed stirring, after 30 minutes, namely obtains oil-in-water emulsified drilling fluid 1.
Embodiment two:
A kind of oil-in-water emulsified drilling fluid is prepared by following prescription:
Get 280 ml waters to be placed in height and to stir cup, add 4 grams of wilkinites, 1.2 grams of sodium carbonate, 120 milliliters of diesel oil, 8 grams of emulsifier polyoxyethylene sorbitan fatty acid fat, 2 grams of alcohol ether glucosides, 10 grams of lubricant high speeds, 1.2 grams of PAM, 4 donaxine base inhibitor, 4 grams of sulfonated phenol formaldehyde resins, 4 grams of modifying asphalt anti-sloughing agents, 4 grams of nanoemulsions, 4 grams of calcium carbonate superfine powders, high-speed stirring 30 minutes, add Wingdale 186.8 grams of regulating densities again, high-speed stirring, after 30 minutes, namely obtains oil-in-water emulsified drilling fluid 2.
Embodiment three:
A kind of oil-in-water emulsified drilling fluid is prepared by following prescription:
Get 240 ml waters to be placed in height and to stir cup, add 4 grams of wilkinites, 1.2 grams of sodium carbonate, 160 milliliters of gas liquefactions, 9 grams of emulsifier polyoxyethylene sorbitan fatty acid fat, 3 grams of alcohol ether glucosides, 6 grams of high 0.8 gram of XC of lubricant, 4 donaxine base inhibitor, 4 grams of sulfonated phenol formaldehyde resins, 4 grams of modifying asphalt anti-sloughing agents, 3 grams of nanoemulsions, 5 grams of calcium carbonate superfine powders, high-speed stirring 40 minutes, namely obtains oil-in-water emulsified drilling fluid 3.
The implementation result of each scheme is as shown in table 1:
Table 1 oil-in-water emulsified property of drilling fluid
The temperature resistance of drilling fluid of the present invention reaches 150 DEG C, density 0.91g/cm
3-2.0g/cm
3there is the features such as satisfactory stability, inhibition, oilness; the under-balanced drilling of low pressure exhaustion hydrocarbon zone, reservoir pressure coefficient about 1.0 can be met, can be used for again the construction of normal pressures or unconventionaloil pool Tibetan horizontal well, available protecting is carried out to reservoir simultaneously.
Claims (5)
1. an oil-in-water emulsified drilling fluid, its base fluid is made up of the aqueous phase of 60-90 volume parts, the oil phase of 10-40 volume parts, it is characterized in that described drilling fluid also comprises the component of following mass fraction:
A. wilkinite 0.5-4 part;
B. pH adjusting agent 0.1-0.5 part;
C. tackifier 0.1-0.3 part;
D. inhibitor 1-2 part;
E. fluid loss agent 2-3 part;
F. plugging agent 1-3 part;
G. emulsifying agent 0.5-3.0 part;
H. lubricant 1-4 part;
I. high-density weighting material 0-710 part, adding of described high-density weighting material makes the density of this drilling fluid be 0.91-2.0g/cm
3.
2. oil-in-water emulsified drilling fluid according to claim 1, is characterized in that: oil phase is the one in diesel oil, white oil, gas liquefaction.
3. oil-in-water emulsified drilling fluid according to claim 1 and 2, is characterized in that: described wilkinite is sodium bentonite; Described pH adjusting agent is the one of sodium hydroxide or sodium carbonate; Described tackifier are xanthan gum XC, Xylo-Mucine CMC, Polyanionic Cellulose PAC any one or its combination of more than two kinds, and when employing two kinds, the two is with arbitrarily than mixing; The inhibitor stated is amido inhibitor; Described fluid loss agent be fluid loss agent select sulfonated phenol formaldehyde resin or modifying asphalt anti-sloughing agent one or both, when employing two kinds, the two is with arbitrarily than mixing; Described plugging agent is the combination of nanoemulsions and calcium carbonate superfine powder, and both are with arbitrarily than mixing; Described emulsifying agent be polyoxyethylene sorbitan fatty acid ester with alcohol ether glucoside by (1-3): the product that the mass ratio of 1 mixes; Described lubricant is refined by stearic acid, Palmiticacid and oleic acid and additive and is formed; Described high-density weighting material is one or both in barite, Wingdale, rhombohedral iron ore, and when employing two kinds, the two is with arbitrarily than mixing.
4. oil-in-water emulsified drilling fluid according to claim 3, is characterized in that: described inhibitor molecules formula is NH
2(CH
2cHOR) CH
2cHRNH
2, R is the alkyl of 2-8 carbon atom.
5. the preparation method for the arbitrary described oil-in-water emulsified drilling fluid of claim 1-4, it is characterized in that: in water, add wilkinite, alkali, oil, emulsifying agent, lubricant, tackifier, inhibitor, fluid loss agent, plugging agent in proportion, high-speed stirring 30-50 minute, finally add high-density weighting material and be adjusted to design density, after high-speed stirring 20-30 minute, namely obtain emulsion drilling fluid.
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| CN201310607107.8A CN104650833A (en) | 2013-11-25 | 2013-11-25 | Oil-in-water emulsion drilling fluid and preparation method thereof |
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|---|---|---|---|
| CN201310607107.8A CN104650833A (en) | 2013-11-25 | 2013-11-25 | Oil-in-water emulsion drilling fluid and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062438A (en) * | 2015-08-03 | 2015-11-18 | 湖北汉科新技术股份有限公司 | Oil based emulsified drilling fluid with ultralow oil-water ratio of 40:60 |
| CN105694830A (en) * | 2016-03-14 | 2016-06-22 | 中国石油集团渤海钻探工程有限公司 | Organic salt drilling fluid |
| CN105754563A (en) * | 2016-03-14 | 2016-07-13 | 中国石油集团渤海钻探工程有限公司 | Organic salt drilling fluid applicable to extended-reach wells |
| CN107325797A (en) * | 2016-04-28 | 2017-11-07 | 中国石油化工股份有限公司 | A kind of low oil-water ratio oil base drilling fluid and preparation method thereof |
| CN109652033A (en) * | 2019-01-24 | 2019-04-19 | 西南石油大学 | A kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof |
| CN109868123A (en) * | 2017-12-04 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of low density water base drilling fluid and preparation method thereof |
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| CN1362463A (en) * | 2002-01-06 | 2002-08-07 | 大庆石油管理局 | High temperature-resisting oil-in-water drilling fluid |
| CN101747872A (en) * | 2008-12-12 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Water-in-oil sealing fluid and preparation method thereof |
| CN102433109A (en) * | 2011-10-21 | 2012-05-02 | 中国石油大学(华东) | Water-based drilling fluid with high suppression and lubrication performance and preparation method thereof |
-
2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1362463A (en) * | 2002-01-06 | 2002-08-07 | 大庆石油管理局 | High temperature-resisting oil-in-water drilling fluid |
| CN101747872A (en) * | 2008-12-12 | 2010-06-23 | 西部钻探克拉玛依钻井工艺研究院 | Water-in-oil sealing fluid and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062438A (en) * | 2015-08-03 | 2015-11-18 | 湖北汉科新技术股份有限公司 | Oil based emulsified drilling fluid with ultralow oil-water ratio of 40:60 |
| CN105062438B (en) * | 2015-08-03 | 2017-08-25 | 湖北汉科新技术股份有限公司 | A kind of oil base emulsion drilling fluid of 40 ︰ 60 ultralow oil-water ratio |
| CN105694830A (en) * | 2016-03-14 | 2016-06-22 | 中国石油集团渤海钻探工程有限公司 | Organic salt drilling fluid |
| CN105754563A (en) * | 2016-03-14 | 2016-07-13 | 中国石油集团渤海钻探工程有限公司 | Organic salt drilling fluid applicable to extended-reach wells |
| CN105694830B (en) * | 2016-03-14 | 2018-06-19 | 中国石油集团渤海钻探工程有限公司 | A kind of organic salt drilling fluid |
| CN105754563B (en) * | 2016-03-14 | 2018-08-17 | 中国石油集团渤海钻探工程有限公司 | A kind of organic salt drilling fluid suitable for extended reach well |
| CN107325797A (en) * | 2016-04-28 | 2017-11-07 | 中国石油化工股份有限公司 | A kind of low oil-water ratio oil base drilling fluid and preparation method thereof |
| CN109868123A (en) * | 2017-12-04 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of low density water base drilling fluid and preparation method thereof |
| CN109652033A (en) * | 2019-01-24 | 2019-04-19 | 西南石油大学 | A kind of Biodegradable environment protection high inhibition drilling fluid and preparation method thereof |
| CN109652033B (en) * | 2019-01-24 | 2021-10-22 | 西南石油大学 | Biodegradable environment-friendly strong-inhibition drilling fluid and preparation method thereof |
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