CN101275071A - Water-based collapse-proof drilling fluid - Google Patents
Water-based collapse-proof drilling fluid Download PDFInfo
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- CN101275071A CN101275071A CNA2008101062245A CN200810106224A CN101275071A CN 101275071 A CN101275071 A CN 101275071A CN A2008101062245 A CNA2008101062245 A CN A2008101062245A CN 200810106224 A CN200810106224 A CN 200810106224A CN 101275071 A CN101275071 A CN 101275071A
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Abstract
The present invention provides a water-based anti-sloughing drilling fluid, used for diving into water-based drilling to continue the drilling engineering after implementing the gas drilling, belonging to extending technology field of petroleum natural gas water-based drilling liquid, the formula of the invention includes soil paste, macromolecule coating agent, SMP-1, RSTF, DHD, FRH, RLC101, DR-II, KCl, CaO, diesel oil and wettability reversal agent, the invention combines the technical theories of wettability reversal anti-sloughing, low permeability anti-sloughing and low radioactivity anti-sloughing, collocating a water-based anti-sloughing drilling fluid having characteristics of low wettability reversal angle, low low permeability and low radioactivity, resolving the technical problem of unstable wall after diving into the water-based drilling liquid when the present gas drilling is finished, the wettability reversal angle, permeability, high-medium pressure filtration data are in a lower range, realizing an integrity of the three anti-sloughing technology of wettability reversal-low permeability and low radioactivity.
Description
Technical field:
A kind of water-based collapse-proof drilling fluid is used to implement gas drilling and replaces the engineering that continues to implement drilling well into water-base drilling fluid later on, belongs to the expansion technical field of oil and gas water-base drilling fluid.
Background technology:
In order to improve drilling speed, accelerate the tempo of development of oil and gas, at present, a large amount of in the world drilling engineerings adopts gas drilling, uses gases such as air, nitrogen to implement drilling engineering as medium, has received that several times improve the effect of rate of penetration; But, because subterranean geological condition complexity, the not every well section of a bite well can all adopt gas enforcement drilling well, but want gas and conventional drilling liquid to be used alternatingly, therefore, after being fit to adopt gas to finish drilling well as the well section of drilling well medium, just need to adopt conventional drilling fluid in the well section that can not adopt gas drilling, but after finishing, adopts gas drilling conventional poly-potassium at present, the serious technical problem of ubiquity borehole well instability when water-base drilling fluids such as poly-sulphur are implemented drilling well, prove through present drilling practice in Sichuan, many mouthfuls of wells are because conventional poly-potassium is used in conversion after implementing gas drilling, water-base drilling fluids such as poly-sulphur, the problem that borehole well instability occurs, caused long-time big section reaming, the well reaming that has was above 10 days, and, hole diameter amplification degree＞100% of electrical measurement data display part well, this present situation has been offset the speed-raising effect that gas drilling brings; Though researchs are arranged at this problem is more domestic, also obtained the part achievement, can suitably improve technologies such as well control fluid density as the invert emulsion mud technology, but, present technology still can not solve after the using gas drilling well finishes and replaces water-base drilling fluid, keeps the requirement of Technologies such as wellbore stability.
Summary of the invention:
The present invention be directed to prior art and replace the problem that exists into conventional poly-potassium, poly-sulphur water-base drilling fluid at the enforcement gas drilling later on, the technical know-how anti-collapse in conjunction with wettability reversal, that hyposmosis is anti-collapse and low-activity is anti-collapse disposes a kind of water-based collapse-proof drilling fluid with low wettability reversal angle, hyposmosis, low-activity characteristics.
The present invention is achieved in that according to the integrated thinking of the anti-collapse technology of individual event obtain this prescription by a large amount of experiments, prescription of the present invention is as follows:
3.1% soil paste+0.2% macromole coating agent+4%SMP-1+4%RSTF+5%DHD+5%FRH+8%RLC101+2%DR-II+5%KCl+1%CaO+, 5% diesel oil+2% reverse wetting agent;
Prescription of the present invention carries out according to following order when configuration: earlier fused 3.1% soil paste and 0.2% macromole coating agent, add 4%SMP-1,4%RSTF, 5%DHD, 5% diesel oil, 5%FRH, 8%RLC101 and 2%DR-II then successively, add 5%KCl and 1%CaO then, add 2% reverse wetting agent at last;
The molecular weight of described macromole coating agent is: 500～1,000 ten thousand;
The composition of described soil paste is: 3% wilkinite and 0.1% soda ash;
The composition of described reverse wetting agent is: 2% Trimethyllaurylammonium bromide;
In the formula: SMP-1 is: salt resistant filter loss reduction agent;
RSTF is: the resin fluid loss agent:
DHD is: lubricant;
FRH is anti-collapse dose;
RLC101 is: stratum sealing hydrophobizing agent;
DR-II is: the mud cake activator;
KCl is the activity conditioning agent;
CaO is: activity conditioning agent and pH regulator agent;
Advantage of the present invention and beneficial effect are: the fine requirement of satisfying drilling engineering of traditional performance parameter energy of water-base drilling fluid of the present invention, its characteristic parameter wettability reversal angle, activity, high pressure filter loss data are all a very low scope, especially sand-bed filtration can reach does not have infiltration, system presents three low features of significant low wettability reversal angle, hyposmosis, low-activity characteristics, has realized that wettability reversal-hyposmosis-three kinds of anti-collapse technology of low-activity are integrated in the imagination in the cover drilling fluid system.
Embodiment:
Below prescription of the present invention and test are further specified: the present invention is made of 12 kinds of compositions, comprising:
3.1% soil paste+0.2% macromole coating agent+4%SMP-1+4%RSTF+5%DHD+5% diesel oil+5%FRH+8%RLC101+2%DR-II+5%KCl+1%CaO+2% reverse wetting agent;
Wherein:
The molecular weight of macromole coating agent is: 500～1,000 ten thousand
The composition of soil paste is: 3% wilkinite, 0.1% soda ash
The composition of reverse wetting agent is: 2% Trimethyllaurylammonium bromide
In the formula:
SMP-1 is: salt resistant filter loss reduction agent;
RSTF is: the resin fluid loss agent:
DHD is: lubricant;
FRH is: anti-collapse dose;
RLC101 is: stratum sealing hydrophobizing agent;
DR-II is: mud cake cake activator;
KCl: be the activity conditioning agent;
CaO is: activity conditioning agent and pH regulator agent;
Through breadboard experiment, drilling fluid according to above-mentioned recipe configuration, wettability reversal angle is customized for 180 ° of differences with contact angle, adopt the Finland CAM200 of KSV company modularization optics contact angle and surface tension instrument to measure, the result is: behind 80 ℃ of constant temperature rolling 16h, when temperature drops to 50 ℃, the property of drilling fluid of test configurations, test result shows: KCl sulphonated polymer mud activity commonly used is generally 0.90～0.93, wettability reversal angle is at 130～150 °, and sand-bed filtration amount mistake condition entirely is 10～20 order sand; After the situation of borehole well instability is studied in to gas drilling, field experiment obtains to cause that the principal element of borehole well instability has two aspects: the one, and the mechanical property factor, the 2nd, when gas drilling, there is not the water sensitivity factor in the water sensitivity factor, only there is the mechanical property factor, though the pit shaft rock strength can reduce by 1/2～1/3, the borehole wall is still stable, still, after replacing to water-base drilling fluid from gas, just there is the factor of mechanical property and water sensitivity two aspects in wellbore stability; Evidence, though when replacing well control fluid, considered the balance of the fluid column pressure and the formation pore pressure of drilling fluid, but after replacing well control fluid, still have outstanding performance by the borehole well instability problem that the water sensitivity factor causes, particularly after the suction of the mud shale of down-hole, intensity descends straight line, water regain is big more, and intensity reduces many more, and this is the major cause that causes borehole well instability; This prescription has been introduced the anti-collapse technology of low wettability reversal, the anti-collapse technology of hyposmosis and the anti-collapse technology of low-activity, the introducing of the low anti-collapse technology of wettability reversal makes submerged drilling fluid and filtrate can make borehole wall stratum generation wettability reversal become lipophilicity at short notice, reduce capillary absorption, make rock of borehole intensity before not forming filter cake, not have big reduction, thereby can prevent the generation of collapsing; The introducing of the anti-collapse technology of hyposmosis make gas drilling finish to replace into well control fluid can fill shutoff microfracture, crack within a short period of time, form fine and close hydrophobic interior filter cake, and can make borehole wall surface form fine and close hydrophobic coating, realize the low infiltration to the borehole wall of drilling fluid and filtrate, then the unstability of the borehole wall is difficult for taking place; The introducing of the anti-collapse technology of low-activity makes the activity of drilling fluid be lower than borehole wall mud shale activity, and water molecules is entered in the drilling fluid by the stratum, makes the mud shale dehydration, realizes the stable of rock strength, reduces the purpose that drilling fluid activity reaches stabilizing borehole; Test in place with three mouthfuls of wells of Sichuan Long Gang structure is that example illustrates effect of the present invention: imperial Gang11Jing below, dragon Gang10Jing, three mouthfuls of wells of dragon hilllock 7 wells, all air drilling or nitrogen injection drilling have been used in different well sections respectively, obtained very high rate of penetration, drilling depth near 4000m about, layer position mainly is Soil Developed From Suining Group, Sha Xi mausoleum group, the gravity flow well group, Xu Jia river group, lithology is mainly big section mud shale and sandstone formation, be converted to by gas drilling before water-based mud creeps into, at the scene according to recipe configuration of the present invention water-based drilling mud of the present invention, configuration sequence is: mix 3.1% soil paste and 0.2% macromole coating agent earlier, add 4%SMP-1 then, 4%RSTF, 5%DHD, 5% diesel oil, 5%FRH, 8%RLC101 and 2%DR-II, stir while adding, add 5%KCl and 1%CaO then, continue to stir, add 2% reverse wetting agent at last; Characteristic parameter is controlled at: 10 °～13 ° of wettability reversal angles, activity 0.83～0.86, HTHPFL≤10mL, after gas drilling finishes, disposable immediately replace the water-base drilling fluid of the present invention that configures after, the all very smooth and rapid recovery that makes a trip of circulation well cleanup a few hours is crept into, the borehole well instability problem does not appear, empty well electrical measurement hole diameter to imperial Gang11Jing shows, after air drilling replaces water base well control fluid of the present invention to 2156m, circulation 8h trip-out electrical measurement hole diameter, diameter enlargement ratio is from 9.1% of the 1825m well depth, be reduced to 7.6%, the borehole wall is had tangible repairing effect; Through evidence, water-based drilling liquid system of the present invention is that the anti-collapse technology three's organic integration of the anti-collapse technology-low-activity of the anti-collapse technology-hyposmosis of low wettability reversal is overlapped in the drilling fluid system one, its traditional performance parameter system presents significantly " low wettability reversal angle, hyposmosis, low-activity " feature, therefore no matter body series is anti-collapse in short-term, and still long-acting anti sloughing effectiveness aspect all has the obvious advantage that is different from conventional water-base drilling fluid.
Claims (5)
1, a kind of water-based collapse-proof drilling fluid is characterized in that: this drilling fluid is made of following prescription: 3.1% soil paste+0.2% macromole coating agent+4%SMP-1+4%RSTF+5%DHD+5%FRH+8%RLC101+2%DR-II+5%KCl+1%CaO+, 5% diesel oil+2% reverse wetting agent.
2, water-based collapse-proof drilling fluid according to claim 1, it is characterized in that: earlier fused 3.1% soil paste and 0.2% macromole coating agent, add 4%SMP-1,4%RSTF, 5%DHD, 5% diesel oil, 5%FRH, 8%RLC101 and 2%DR-II then successively, add 5%KCl and 1%CaO then, add 2% reverse wetting agent at last.
3, water-based collapse-proof drilling fluid according to claim 1 is characterized in that: the molecular weight of described macromole coating agent is: 500～1,000 ten thousand.
4, water-based collapse-proof drilling fluid according to claim 1 is characterized in that: the composition of described soil paste is: 3% wilkinite and 0.1% soda ash.
5, water-based collapse-proof drilling fluid according to claim 1 is characterized in that: the composition of described reverse wetting agent is: 2% Trimethyllaurylammonium bromide.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101062245A CN101275071A (en) | 2008-05-09 | 2008-05-09 | Water-based collapse-proof drilling fluid |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101062245A CN101275071A (en) | 2008-05-09 | 2008-05-09 | Water-based collapse-proof drilling fluid |
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| CN101275071A true CN101275071A (en) | 2008-10-01 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948679A (en) * | 2010-08-25 | 2011-01-19 | 中国石油大学(北京) | Intelligent reservoir drilling completion fluid system and preparation method thereof |
| CN102093855A (en) * | 2010-12-17 | 2011-06-15 | 中国石油集团长城钻探工程有限公司 | Organic soil and preparation method thereof |
| CN104373042A (en) * | 2013-08-06 | 2015-02-25 | 中国石油化工集团公司 | Method for replacing drilling fluid after gas drilling |
| CN105349122A (en) * | 2015-12-02 | 2016-02-24 | 北京奥意尔工程技术有限公司 | Anti-sloughing drilling fluid for fast drilling |
| CN106147728A (en) * | 2015-04-27 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of shale horizontal well water-base drilling fluid and preparation method thereof |
| CN110105930A (en) * | 2019-04-23 | 2019-08-09 | 上海勃利燃气设备有限公司 | A kind of bentonite drilling fluid and preparation method thereof |
| CN113027363A (en) * | 2021-05-08 | 2021-06-25 | 中国石油大学(北京) | Application method of fractured formation drilling fluid |
-
2008
- 2008-05-09 CN CNA2008101062245A patent/CN101275071A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101948679A (en) * | 2010-08-25 | 2011-01-19 | 中国石油大学(北京) | Intelligent reservoir drilling completion fluid system and preparation method thereof |
| CN101948679B (en) * | 2010-08-25 | 2015-11-25 | 中国石油大学(北京) | A kind of Intelligent reservoir drilling completion fluid system and preparation method thereof |
| CN102093855A (en) * | 2010-12-17 | 2011-06-15 | 中国石油集团长城钻探工程有限公司 | Organic soil and preparation method thereof |
| CN102093855B (en) * | 2010-12-17 | 2013-05-15 | 中国石油集团长城钻探工程有限公司 | Organic soil and preparation method thereof |
| CN104373042A (en) * | 2013-08-06 | 2015-02-25 | 中国石油化工集团公司 | Method for replacing drilling fluid after gas drilling |
| CN106147728A (en) * | 2015-04-27 | 2016-11-23 | 中国石油化工股份有限公司 | A kind of shale horizontal well water-base drilling fluid and preparation method thereof |
| CN105349122A (en) * | 2015-12-02 | 2016-02-24 | 北京奥意尔工程技术有限公司 | Anti-sloughing drilling fluid for fast drilling |
| CN110105930A (en) * | 2019-04-23 | 2019-08-09 | 上海勃利燃气设备有限公司 | A kind of bentonite drilling fluid and preparation method thereof |
| CN113027363A (en) * | 2021-05-08 | 2021-06-25 | 中国石油大学(北京) | Application method of fractured formation drilling fluid |
| CN113027363B (en) * | 2021-05-08 | 2022-04-08 | 中国石油大学(北京) | Application method of fractured formation drilling fluid |
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Open date: 20081001 |