CN102321457A - Drilling fluid high-temperature stabilizer - Google Patents
Drilling fluid high-temperature stabilizer Download PDFInfo
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- CN102321457A CN102321457A CN201110207250A CN201110207250A CN102321457A CN 102321457 A CN102321457 A CN 102321457A CN 201110207250 A CN201110207250 A CN 201110207250A CN 201110207250 A CN201110207250 A CN 201110207250A CN 102321457 A CN102321457 A CN 102321457A
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- drilling fluid
- high temperature
- stablizer
- drilling fluids
- natural polymer
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Abstract
The invention discloses a drilling fluid high-temperature stabilizer and a method for improving natural polymer drilling liquid temperature-resistance performance. The method comprises the following steps: adding a deoxidant and a peroxy radical scavenger into the natural polymer drilling fluid (modified starch, modified fiber, biopolymer and the like); and removing dissolved oxygen and peroxy radical in the drilling fluid, thus the damage effect of thermal oxidation degradation to the natural polymer is relieved, the high-temperature stability of the drilling fluid is improved, the application range of the natural polymer drilling fluid is expanded, and the drilling cost is lowered obviously.
Description
Technical field
The invention belongs to petrochemical industry, in particular to the drilling fluids at high temperature stablizer.
Background technology
The high temperature failure of additive for drilling fluid, especially starch, Mierocrystalline cellulose, XC polymer class natural macromolecular material is a great problem of drilling fluid research field always.Natural materialss such as treated starch, modified-cellulose, XC polymer have that the source is wide, renewable, price is low, result of use good and advantage such as environmental protection, but the temperature resistance ability is very limited its use range.
Summary of the invention
In order to improve the heat-resisting property of natural polymer drilling fluid, the present invention adopts following technical scheme:
The present invention optimizes the oxygen scavenger and the combination of peroxy radical scavenging agent, i.e. the drilling fluids at high temperature stablizer that are applicable to the natural polymer drilling fluid system through to existing oxygen scavenger and peroxy radical scavenging agent screening experiment.
Drilling fluids at high temperature stablizer of the present invention comprises: oxygen scavenger, peroxy radical scavenging agent and iron ion complexing agent.
In a preferred implementation of the present invention, described oxygen scavenger is SODIUM ISOVITAMIN C and/or thiocarbamide.
In a preferred implementation of the present invention, described peroxy radical scavenging agent is N, N '-di-sec-butyl-p-phenyl enediamine.
In a preferred implementation of the present invention, described iron ion complexing agent is a Hydrocerol A.
In a preferred implementation of the present invention, oxygen scavenger in the above-mentioned drilling fluids at high temperature stablizer, the consumption 0.1-1 of peroxy radical scavenging agent and iron ion complexing agent: 0.2-2: 0.1-1, optimum ratio are 0.5-1: 1-2: 0.5-1.
The invention still further relates to a kind of drilling fluid; It comprises above-mentioned drilling fluids at high temperature stablizer; The preferred drilling fluid of the present invention is the natural polymer drilling fluid preferably; Described natural polymer drilling fluid is meant and contains a kind of natural polymer in the drilling fluid at least, for example treated starch, modified-cellulose, XC polymer class natural macromolecular material.
In a preferred implementation of the present invention, the addition of described drilling fluids at high temperature stablizer in drilling fluid is generally 0.1-1 ‰, and preferably 0.3-0.8 ‰, further 0.4-6 ‰ preferably;
Used N, N '-di-sec-butyl-p-phenyl enediamine's trade(brand)name is again: oxidation inhibitor 44PD, oxidation inhibitor 4720;
Used SODIUM ISOVITAMIN C chemistry D-2 by name, 3,5,6-tetrahydroxy-2-hexenoic acid-gamma lactone hydrochlorate (D-2,3,5,6-thtrahydroxy-2-hexenic acid-γ-lactone sodium salt);
Used thiocarbamide is a thio urea.
The present invention has consumption, and cost is low less, and raw material sources are extensive, environmental friendliness, and antifouling property is good, and advantage safe in utilization has very big application potential.
Embodiment
Below in conjunction with embodiment the present invention is further specified.Per-cent such as nothing among each embodiment particularly point out, and all are weight percentage, and used medicine is the market common drug.
1.N, N '-di-sec-butyl-p-phenyl enediamine, the Nanjing profit reaches chemical industry ltd.
2. SODIUM ISOVITAMIN C, chemical industry ltd is opened up in last Haikang.
3. thiocarbamide, Yantai Da Site digests worker ltd.
4. Hydrocerol A, the permanent economy and trade in great achievement sky, Jinan ltd.
Embodiment 1:
The prescription of high-temperature stabiliser (mass ratio) comprising:
1. oxygen scavenger, staple is SODIUM ISOVITAMIN C and thiocarbamide, consumption is 1;
2. peroxy radical scavenging agent, staple is N, N '-di-sec-butyl-p-phenyl enediamine, consumption are 2;
3. iron ion complexing agent, staple is a Hydrocerol A, consumption is 1.
Along with above-mentioned drilling fluids at high temperature stablizer is added in the entry, reduce rapidly through the dissolved oxygen content that detects in the water, about 2 hours, be zero through the oxygen level that detects in the water.
Embodiment 2:
In 5% soil paste, add 2% treated starch, height stirs 20min, and 150 ℃ aging recorded after 16 hours:
AV: 18.5mPas; PV: 15mPas; Yield value: 3.5Pa; API WL: 12.5ml.
In 5% soil paste, add 2% treated starch, add 0.5 ‰ drilling fluids at high temperature stablizers after, height stirs 20min, 150 ℃ aging recorded after 16 hours:
AV: 23mPas; PV: 18mPas; Yield value: 5Pa; API WL: 8.0ml.
Explain that viscosity, shear force that drilling fluids at high temperature stablizer of the present invention has improved high temperature post-modification starch drilling fluid have reduced the API WL simultaneously, have improved the heat-resisting property of treated starch.
Embodiment 3:
In 5% soil paste, add 2% CMC 99.5 (CMC), height stirs 20min, and 150 ℃ aging recorded after 16 hours:
AV: 31mPas; PV: 25mPas; Yield value: 6.1Pa; API WL: 11.2ml.
In 5% soil paste, add 2% CMC, add 0.5 ‰ drilling fluids at high temperature stablizer, height stirs 20min, and 150 ℃ aging recorded after 16 hours:
AV: 50mPas; PV: 27mPas; Yield value: 23.5Pa; API WL: 8.1ml.
Explain that drilling fluids at high temperature stablizer of the present invention has improved that the viscosity of CMC 99.5 drilling fluid, shear force have reduced the API WL simultaneously behind the high temperature, has improved the heat-resisting property of CMC 99.5.
Embodiment 4:
In 5% soil paste, add 0.5% XC polymer XC, height stirs 20min, and 150 ℃ aging recorded after 16 hours:
AV: 44.5mPas; PV: 25mPas; Yield value: 19.9Pa; API WL: 12.8ml.
In 5% soil paste, add 0.5% XC polymer XC, add 0.5 ‰ drilling fluids at high temperature stablizers, height stirs 20min, and 150 ℃ aging recorded after 16 hours:
AV: 47mPas; PV: 16mPas; Yield value: 31.7Pa; API WL: 8.0ml.
Explain that drilling fluids at high temperature stablizer of the present invention has improved that the viscosity of XC drilling fluid, shear force have reduced the API WL simultaneously behind the high temperature, has improved the heat-resisting property of XC.
When being understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (10)
1. the drilling fluids at high temperature stablizer is characterized in that comprising: oxygen scavenger, peroxy radical scavenging agent and iron ion complexing agent.
2. the described drilling fluids at high temperature stablizer of claim 1, described oxygen scavenger is SODIUM ISOVITAMIN C and/or thiocarbamide.
3. the described drilling fluids at high temperature stablizer of claim 1, described peroxy radical scavenging agent is N, N '-di-sec-butyl-p-phenyl enediamine.
4. the described drilling fluids at high temperature stablizer of claim 1, described iron ion complexing agent is a Hydrocerol A.
5. the described drilling fluids at high temperature stablizer of claim 1, oxygen scavenger in the above-mentioned drilling fluids at high temperature stablizer, the consumption of peroxy radical scavenging agent and iron ion complexing agent is 0.1-1: 0.2-2: 0.1-1, optimum ratio are 0.5-1: 1-2: 0.5-1.
6. drilling fluid, it comprises any described drilling fluids at high temperature stablizer of claim 1-5.
7. the described drilling fluid of claim 6, drilling fluid is the natural polymer drilling fluid preferably, and described natural polymer drilling fluid is meant and contains a kind of natural polymer in the drilling fluid at least.
8. the described drilling fluid of claim 6, described natural polymer is treated starch and/or modified-cellulose and/or XC polymer class natural macromolecular material.
9. any described drilling fluid of claim 6-8, the addition of described drilling fluids at high temperature stablizer in drilling fluid is generally 0.1-1 ‰, and preferably 0.3-0.8 ‰, further 0.4-6 ‰ preferably.
10. the application of any described drilling fluids at high temperature stablizer of claim 1-5 in improving the drilling fluid temperature resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207250A CN102321457A (en) | 2011-07-25 | 2011-07-25 | Drilling fluid high-temperature stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110207250A CN102321457A (en) | 2011-07-25 | 2011-07-25 | Drilling fluid high-temperature stabilizer |
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| CN102321457A true CN102321457A (en) | 2012-01-18 |
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| CN201110207250A Pending CN102321457A (en) | 2011-07-25 | 2011-07-25 | Drilling fluid high-temperature stabilizer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955595A (en) * | 2018-01-18 | 2018-04-24 | 中国石油大学(华东) | A kind of oxygen scavenger for flooding polymers and preparation method thereof |
| CN110358520A (en) * | 2019-06-18 | 2019-10-22 | 中国石油天然气股份有限公司 | Deoxidant for modified brine workover fluid, modified brine workover fluid and preparation method thereof |
| CN110791276A (en) * | 2019-06-28 | 2020-02-14 | 大港油田集团有限责任公司 | Stabilizer for polymer solution under high-temperature and high-salt conditions, and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010013325A1 (en) * | 2008-07-30 | 2010-02-04 | 株式会社ニレコ | Spectrophotometer |
| WO2010133258A1 (en) * | 2009-05-18 | 2010-11-25 | Snf Sas | Novel formulations of water-soluble polymers and stabilizing additives for injecting a single compound useable in injection fluids for chemical enhanced oil recovery |
-
2011
- 2011-07-25 CN CN201110207250A patent/CN102321457A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010013325A1 (en) * | 2008-07-30 | 2010-02-04 | 株式会社ニレコ | Spectrophotometer |
| WO2010133258A1 (en) * | 2009-05-18 | 2010-11-25 | Snf Sas | Novel formulations of water-soluble polymers and stabilizing additives for injecting a single compound useable in injection fluids for chemical enhanced oil recovery |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107955595A (en) * | 2018-01-18 | 2018-04-24 | 中国石油大学(华东) | A kind of oxygen scavenger for flooding polymers and preparation method thereof |
| CN107955595B (en) * | 2018-01-18 | 2020-06-19 | 中国石油大学(华东) | Preparation method of deoxidant for oil displacement polymer |
| CN110358520A (en) * | 2019-06-18 | 2019-10-22 | 中国石油天然气股份有限公司 | Deoxidant for modified brine workover fluid, modified brine workover fluid and preparation method thereof |
| CN110791276A (en) * | 2019-06-28 | 2020-02-14 | 大港油田集团有限责任公司 | Stabilizer for polymer solution under high-temperature and high-salt conditions, and preparation method and application thereof |
| CN110791276B (en) * | 2019-06-28 | 2021-09-07 | 大港油田集团有限责任公司 | Stabilizer for polymer solution under high-temperature and high-salt conditions, and preparation method and application thereof |
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Address after: Shaanxi Xi'an high tech Zone Technology Road 710065 No. 30 Cheshire Heli building A block 10 layer Applicant after: China Petroleum University (East China) Address before: 266555 Qingdao economic and Technological Development Zone, Changjiang Road, No. 66, Shandong Applicant before: China Petroleum University (East China) |
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Application publication date: 20120118 |