CN101705080A - Deepwater drilling liquid - Google Patents
Deepwater drilling liquid Download PDFInfo
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- CN101705080A CN101705080A CN 200910250323 CN200910250323A CN101705080A CN 101705080 A CN101705080 A CN 101705080A CN 200910250323 CN200910250323 CN 200910250323 CN 200910250323 A CN200910250323 A CN 200910250323A CN 101705080 A CN101705080 A CN 101705080A
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Abstract
The invention relates to drilling liquid, in particular to deepwater drilling liquid which comprises the following components, by mass percent: 0-8% of bentonite, 0.05-5% of well wall stabilizing agent, 1-6% of visbreaking fluid loss control agent used for the drilling liquid, 1-6% of carboxymethyl sulfonated phenol formaldehyde resin used for the drilling liquid, 5% of sodium chloride NaCl to saturated sodium chloride NaCl, 5-50% of glycol and the balance of fresh water or seawater. The invention provides a formula of the drilling liquid suitable for (marine) deepwater drilling and solves the problems of poor rheological property of the drilling liquid in a deepwater drilling process, easy formation of a natural gas hydrate and the like. The formula can be suitable for deepwater drilling in the water depth within 3000m and at the temperature of 0-150 DEG C, and the long-term stability can reach 7 days.
Description
Technical field
The present invention relates to a kind of drilling fluid, particularly relate to a kind of deepwater drilling liquid.
Background technology
The ocean deepwater drilling construction is compared with land drilling well or shallow water wellbore construction, there is bigger difference, low as the water-bed temperature of deep water, pressure big, the stratum undercompaction, the sleeve pipe level is many, the marine riser diameter is big etc., correspondingly, construct drilling fluid brought many technical barriers and challenge.
Deepwater drilling liquid must possess the following characteristics: 1, good low temperature rheological behaviour.Increase with the depth of water, seawater temperature is also more and more lower, and 3000 meters depth of water temperature only be 3-4 ℃, some area even about 0 ℃, and the temperature reduction will bring a lot of problems to drilling well and oil producing operation.Under low temperature condition, bigger variation can take place in the rheological of drilling fluid, and viscosity, shear force rise significantly, even also the gelling phenomenon may occur, especially oil base drilling fluid and synthetic base drilling fluid, low excessively temperature environment have also increased the possibility that gas hydrate form; 2, can effectively suppress the generation of gas hydrate.Shallow gas and gas hydrate are one of great latent dangerous factors of running into of deepwater drilling.Gas hydrate has the structure that is similar to ice mainly to be made up of gas molecule and water molecules, if enough it can form more than 0 ℃ pressure.Hydrostaticpressure that deepwater drilling operation seabed is higher and lower envrionment temperature have increased the possibility that generates gas hydrate, in choke line, drilling riser, preventer and submarine well head, in case formation gas hydrate, will stop up tracheae, conduit, marine riser and subsea blow out preventer (BOP) etc., thereby cause serious accident; 3, stronger shale stability.Deepwater regions is away from seashore, and the settling that wind, river and seawater carry is tiny all the more, and its sedimentation velocity, compacting mode and water content are obviously different with land, thereby active big, undercompaction.Often show as and be easy to expansion, dispersed height, easy leakage etc.Cause the sleeve pipe sequence to increase, have in addition above 9 layers; And the large size of marine riser and deep-water low-temperature have increased drilling fluid viscosity and circulating pressure loss, have further worsened hole instability; 4, good suspension stability.Marine drilling need be adopted marine riser, the drilling well of the 3000m depth of water only in the marine riser drilling fluid just at least about 300m
3Therefore, the drilling fluid volume that needs similarly descends big many of the circulation of drilling fluid total amount of the degree of depth than other.Marine riser, casing diameter are bigger, adopt the speed of backflowing on the conventional measure drilling fluid to be difficult to reach the purpose of cleaning well.Therefore, use the drilling fluid different with drilling fluid viscosity in the drilling process and regularly method such as short trip tool to remove drilling cuttings be one of effective measure.Compare with the land drilling well, the marine drilling meeting often meets with typhoon, in case typhoon arrives, for safety therefore the necessary general evacuation platform of staff requires drilling fluid to have satisfactory stability equally, general about 7 days; 5, environmental protection.Require today of increasingly stringent in " environmental law " and " sea law ", marine drilling must be considered environmental acceptability, really accomplishes pollution-free; 6, good reservoir protection performance.The marine drilling relative cost is higher, and especially the deepwater drilling cost is higher, and good reservoir protection performance can help oily company to find and estimate hydrocarbon-bearing pool in time, accurately, and formulates the technical measures that obtain maximum exploitation benefit with least cost; 7, high temperature resistant property preferably.Increase along with piercing depth of stratum, bottom temperature raises rapidly (the deep-sea underground temperature gradient generally is higher than land or shallow sea), when being drilled into zone of interest, formation temperature is often above 100 ℃, even it is higher, therefore, deepwater drilling liquid not only has good low temperature rheological behaviour, should have the ability of certain high temperature resistance simultaneously; 8, good lubricity, can effectively reduce drilling well risk and low relative cost.The offshore drilling cost is higher, and good lubricating property guarantees to make a trip smooth and easy and save to drive energy, shortens rig time; Effectively reduce drilling well risk and down-hole accident complexity, simultaneously, keep the cost of drilling fluid system itself also low as far as possible as far as possible, could really accomplish the low high production that drops into.
Because (ocean) deepwater drilling still is in the starting stage in China, the domestic so far deep well that did not also bore truly. China's prior art is land drilling well or shallow water drilling well drilling fluid system, all can not be applied in the deepwater drilling and go.
Summary of the invention
Technical problem to be solved by this invention is to solve the problem that existing drilling fluid is not suitable for ocean deep drilling construction.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides a kind of deepwater drilling liquid, comprises following component by mass percent:
Wilkinite, 0～8%;
Borehole wall stabilizer, 0.05～5%;
Drilling fluid viscosity reduction fluid loss agent, 1～6%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 1～6%;
Sodium chloride nacl, 5%～saturated;
Ethylene glycol, 5～50%;
All the other are fresh water or seawater.
In the such scheme, described borehole wall stabilizer is polyacrylic acid sylvite or drilling fluid alkene monomer polymer.
Further, deepwater drilling liquid comprises following component by mass percent:
Wilkinite, 6%;
Polyacrylic acid sylvite or drilling fluid alkene monomer polymer, 0.5%;
Drilling fluid viscosity reduction fluid loss agent, 2%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 5%;
Sodium chloride nacl, 10%;
Ethylene glycol, 30%;
All the other are fresh water or seawater.
The invention provides the drilling fluid composition of (ocean) deepwater drilling of a kind of being suitable for, solved in the deep water brill process drilling fluid rheology poor, easily form problems such as gas hydrate, with the interior depth of water, 0～150 ℃ deepwater drilling, permanent stability can reach 7 days to this prescription applicable to 3000m.
Embodiment
The invention provides the drilling fluid composition of (ocean) deepwater drilling of a kind of being suitable for, solved in the deep water brill process drilling fluid rheology poor, easily form problems such as gas hydrate, comprise following specific embodiment.
Embodiment one:
Deepwater drilling liquid comprises following component by mass percent:
Wilkinite, 8%;
The drilling fluid alkene monomer polymer, 0.05%;
Drilling fluid viscosity reduction fluid loss agent, 1%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 6%;
Sodium chloride nacl, 5%;
Ethylene glycol, 50%;
All the other are fresh water or seawater.
After said components is mixed at normal temperatures and pressures high-speed stirring 40min get final product.
Embodiment two:
Deepwater drilling liquid comprises following component by mass percent:
Polyacrylic acid sylvite, 3%;
Drilling fluid viscosity reduction fluid loss agent, 6%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 1%;
Sodium chloride nacl, 10%;
Ethylene glycol, 5%;
All the other are fresh water or seawater.
After said components is mixed at normal temperatures and pressures high-speed stirring 40min get final product.
Embodiment three:
Deepwater drilling liquid comprises following component by mass percent:
Wilkinite, 6%;
Polyacrylic acid sylvite, 0.5%;
Drilling fluid viscosity reduction fluid loss agent, 2%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 5%;
Sodium chloride nacl, 10%;
Ethylene glycol, 30%;
All the other are fresh water or seawater.
After said components is mixed at normal temperatures and pressures high-speed stirring 40min get final product.
Embodiment four:
Deepwater drilling liquid comprises following component by mass percent:
Wilkinite, 1%;
Polymerize aluminum chloride, 5%, as borehole wall stabilizer;
Drilling fluid viscosity reduction fluid loss agent, 3%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 2%;
Ethylene glycol, 10%;
All the other are for fresh water or seawater and add sodium chloride nacl to saturated.
After said components is mixed at normal temperatures and pressures high-speed stirring 40min get final product.
In the above-described embodiments, embodiment three is a most preferred embodiment of the present invention, and it has rheological, low leak-off and good borehole wall stability and hydrate rejection preferably.What wilkinite adopted in the present embodiment is that calcium bentonite is produced in Weifang; Drilling fluid is that limited liability company of the big Creative Science and Technology Co. Ltd of Dongying dan produces with the viscosity reduction fluid loss agent, model is SD-201, and production technique is water: brown coal: caustic soda: formaldehyde: S-WAT=100: 30～50: 4～25: 3～15: 6～30,100 ℃ are stirred 2～4h, cooling, drying; Drilling fluid is that limited liability company of the big Creative Science and Technology Co. Ltd of Dongying dan produces with the carboxymethyl sulfonated phenol formaldehyde resin, model is SD-102, production technique is, water: formic acid or acetate: phenol: formaldehyde: S-WAT: Sodium Pyrosulfite=100: 10～20: 30～50: 30～60: 10～20: 10～20,100 ℃ are stirred 4～8h, cooling, drying.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural changes of making under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. deepwater drilling liquid is characterized in that comprising following component by mass percent:
Wilkinite, 0～8%;
Borehole wall stabilizer, 0.05～5%;
Drilling fluid viscosity reduction fluid loss agent, 1～6%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 1～6%;
Sodium chloride nacl, 5%～saturated;
Ethylene glycol, 5～50%;
All the other are fresh water or seawater.
2. deepwater drilling liquid as claimed in claim 1 is characterized in that described borehole wall stabilizer is polyacrylic acid sylvite or drilling fluid alkene monomer polymer.
3. deepwater drilling liquid as claimed in claim 1 or 2 is characterized in that comprising following component by mass percent:
Wilkinite, 6%;
Polyacrylic acid potassium or drilling fluid alkene monomer polymer, 0.5%;
Drilling fluid viscosity reduction fluid loss agent, 2%;
Drilling fluid carboxymethyl sulfonated phenol formaldehyde resin, 5%;
Sodium chloride nacl, 10%;
Ethylene glycol, 30%;
All the other are fresh water or seawater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250323 CN101705080B (en) | 2009-12-04 | 2009-12-04 | Deepwater drilling liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910250323 CN101705080B (en) | 2009-12-04 | 2009-12-04 | Deepwater drilling liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101705080A true CN101705080A (en) | 2010-05-12 |
| CN101705080B CN101705080B (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910250323 Expired - Fee Related CN101705080B (en) | 2009-12-04 | 2009-12-04 | Deepwater drilling liquid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273696A (en) * | 2014-06-19 | 2016-01-27 | 成都棕通石油配件有限公司 | Slurry used for easily collapsed layer drilling |
| CN106554462B (en) * | 2016-11-07 | 2019-03-26 | 中国石油大学(华东) | Coating agent and its preparation method and application and oil drilling drilling fluid |
| WO2021212902A1 (en) * | 2020-12-01 | 2021-10-28 | 中国科学院广州能源研究所 | Method for enhancing reservoir stability in hydrate exploitation process |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU4614899A (en) * | 1998-06-30 | 2000-01-17 | Otmar Kohler | Folded filter |
| CN1220750C (en) * | 2004-04-22 | 2005-09-28 | 大庆油田建设集团 | Slurry in use for directional drilling into drifting sand layer in horizontal |
| CN101294069A (en) * | 2007-04-28 | 2008-10-29 | 绵阳市仁智实业发展有限责任公司 | Super-high density high temperature resistant drilling fluids |
| CN100516163C (en) * | 2007-10-27 | 2009-07-22 | 东营泰尔石油技术有限公司 | High temperature resistant circulating micro-foam drilling fluid or completion fluid |
-
2009
- 2009-12-04 CN CN 200910250323 patent/CN101705080B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105273696A (en) * | 2014-06-19 | 2016-01-27 | 成都棕通石油配件有限公司 | Slurry used for easily collapsed layer drilling |
| CN106554462B (en) * | 2016-11-07 | 2019-03-26 | 中国石油大学(华东) | Coating agent and its preparation method and application and oil drilling drilling fluid |
| WO2021212902A1 (en) * | 2020-12-01 | 2021-10-28 | 中国科学院广州能源研究所 | Method for enhancing reservoir stability in hydrate exploitation process |
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| Publication number | Publication date |
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| CN101705080B (en) | 2012-12-05 |
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