CN101362938B - Drilling shaft lining stabilizer - Google Patents
Drilling shaft lining stabilizer Download PDFInfo
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- CN101362938B CN101362938B CN2008101510542A CN200810151054A CN101362938B CN 101362938 B CN101362938 B CN 101362938B CN 2008101510542 A CN2008101510542 A CN 2008101510542A CN 200810151054 A CN200810151054 A CN 200810151054A CN 101362938 B CN101362938 B CN 101362938B
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Abstract
本发明公开了一种钻井井壁稳定剂，主要用于解决完井过程中井壁不稳、粘土膨胀造成储层伤害的技术问题，该井壁稳定剂由以下重量份的原料组成：二甲基2烯丙基氯化铵占20-35份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物占2-5份，非离子表面活性剂OP-10占1-5份，含氟烷基乙氧基醚醇非离子氟表面活性剂占1-2份，纤维素酶占1-3份，氯化钾占1-5份，水占45-74份。本发明稳定剂可稳定井壁，大大减少储层粘土的膨胀率，消除储层伤害。The invention discloses a well wall stabilizer for drilling, which is mainly used to solve the technical problems of well wall instability and reservoir damage caused by clay expansion in the well completion process. The well wall stabilizer is composed of the following raw materials in parts by weight: dimethyl 2 allyl ammonium chloride accounts for 20-35 parts, dimethyl 2 allyl ammonium chloride-acrylamide polymer accounts for 2-5 parts, non-ionic surfactant OP-10 accounts for 1-5 parts, fluorine The alkyl ethoxy ether alcohol nonionic fluorosurfactant accounts for 1-2 parts, the cellulase accounts for 1-3 parts, the potassium chloride accounts for 1-5 parts, and the water accounts for 45-74 parts. The stabilizer of the invention can stabilize well walls, greatly reduce the expansion rate of reservoir clay, and eliminate reservoir damage.
Description
Technical field
The invention belongs to the completion field of engineering technology, be specifically related to a kind ofly to be applicable to stabilizing borehole in the completion process, prevent clay swelling, eliminate the drilling shaft lining stabilizer of reservoir damage.
Background technology
The oil field all uses drilling fluid to be used for cleaning and cooling drill bit in drilling process, and be used to carry landwaste, piece stone, earth or the sand of smashing pine by drill bit, in addition drilling fluid also can reduce the ground damage layer, by to drilling well hole wall lining or smear with prevention and subside and realize by stop liquid and solid particulate to invade permeable formation with drilling fluid.
Yet many areas, shale is having under the situation of water, to the water sensitive instability, thereby water-swellable or dispersion, drilling cuttings is broken for less particle as a result, and will separate the particle of fragmentation this moment from the round-robin drilling fluid, just very difficult and expense is high, and the hole instability that is bored.Be in the rock of depths, stratum especially, receive the effect of the stress and the formation pore pressure of overlying strata pressure, horizontal direction, before the well brill was opened, subterranean strata was in the stress equilibrium state; Well is drilled open after, in the well drilling well liquid columnpressure replaced the rock stratum of boring originally to the support of the borehole wall, destroyed the original stress equilibrium in stratum, cause the redistribution of wellbore stress.If the suffered stress of rock surpasses the intensity of rock itself around the borehole wall, will produce shear fracture, brittle formation produces subsides, and causes the plastic formation undergauge, causes hole instability.
The completion engineering is the preceding road engineering of preparing for bringing in; to many reservoirs of drilling fluid well section be replaced out with the clear brine well finishing liquid before the perforation; the liquid that adopts this cleaning not have solid phase during perforation can increase oil well output; well finishing liquid promptly will satisfy various processing requirements; also to accomplish to protect oil reservoir conscientiously; prevent solid phase or drilling cuttings obstruction venturi, can prevent that again filtrate from invading oil reservoir and the interaction causing of reservoir composition clay swelling, fine migration etc. act on the fluid reaction generation precipitation obstruction oil reservoir that stops up in oil reservoir or the oil reservoir.Using at present more be bromine salt, calcium salt well finishing liquid, and bromine salt, calcium salt well finishing liquid easily comprise that with underground fluid oil, Sweet natural gas, underground water, well-flushing precipitate with the generations that interact such as seawater, carbonic acid gas, bigger to reservoir damage.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned deficiency of the prior art, and a kind of completion process that is used for is provided, and plays stabilizing borehole, prevents clay swelling and eliminates the drilling shaft lining stabilizer of reservoir damage effect.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of drilling shaft lining stabilizer, it is characterized in that forming: dimethyl 2 allyl ammonium chloride 20-35 parts by the raw material of following weight part, dimethyl 2 allyl ammonium chlorides-acrylamide polymer 2-5 part, nonionogenic tenside OP-101-5 part, non-ion fluorin surfactant 1-2 part, cellulase 1-3 part, Repone K 1-5 part, water 45-74 part; Described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol, and the molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 50,000-1,000,000.
The preferred technical solution of the present invention is: a kind of drilling shaft lining stabilizer, it is characterized in that forming: 35 parts of dimethyl 2 allyl ammonium chlorides by the raw material of following weight part, 3 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-103 part, 2 parts of non-ion fluorin surfactants, 2 parts of cellulases, 5 parts in Repone K, 50 parts in water; Described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol.
Its preparation method is: take by weighing dimethyl 2 allyl ammonium chlorides, dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-10, non-ion fluorin surfactant, cellulase, Repone K and water by above-mentioned weight part, mixing the back fully stirs, each component is mixed, and borehole wall stabilizer gets product.
Above-mentioned weight part can be weight unit such as gram, kilogram, ton.
The know-why of institute of the present invention foundation: the present invention is a main raw material with dimethyl 2 allyl ammonium chlorides (DMDAAC), dimethyl 2 allyl ammonium chlorides-acrylamide (AM) polymkeric substance (molecular weight is 5-100 ten thousand), tensio-active agent etc., the molecule deposition film component that wherein contains is deposited on the reservoir surface and forms certain thickness molecular film, can be adsorbed on the shale surface, plugged well wall pore and slit, stop filtrate to enter the stratum, reduce pressure penetration, reduce shale and play stabilizing borehole with contacting of water.
The present invention compared with prior art has the following advantages:
1, the present invention can form by the wall cake that participates in the rock stratum at different slits, rock stratum, and the shutoff hole makes the borehole wall have snappiness and scalability, and tangible reduction mud cake lubricating coefficient is arranged, and plays the wellbore stability effect.
2, have outstanding lubricity and rebound effect, when in orientation well, cluster wells drilling well, meeting with the hard point of contact of big area especially, can effectively reduce frictional resistance, reduce moment of torsion, prevent bit freezing.
3,, has the effect of lost circulation prevention, enhancing borehole wall stability owing to its particular components.
4, no fluorescence, nontoxic, no abrasive action.
5, help improving property of drilling fluid, have and reduce viscosity, reduce fluid loss, improve effect such as mud cake.
6, use the present invention, make that wellbore construction technology is simple.
7, has good collaborative stabilization with other inorganic salt.
8, use completion of the present invention, generally can increase production about 30%.
Below by embodiment, technical scheme of the present invention is described in further detail.
Embodiment
Each raw material of following examples all by weight.
Embodiment 1
The raw material of present embodiment consists of: 30 parts of dimethyl 2 allyl ammonium chlorides, 3 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-103 part, 2 parts of non-ion fluorin surfactants, 2 parts of cellulases, 3 parts in Repone K, 57 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 400,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
Its preparation method is: take by weighing dimethyl 2 allyl ammonium chlorides, dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-10, fluorine-containing alkyl ethoxy ether alcohol non-ion fluorin surfactant SUNF-01, cellulase SUNWEE-010, Repone K and water by above-mentioned weight part, mixing the back fully stirs, each component is mixed, and borehole wall stabilizer gets product.
Embodiment 2
The raw material of present embodiment consists of: 20 parts of dimethyl 2 allyl ammonium chlorides, 2 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-101 part, 2 parts of non-ion fluorin surfactants, 3 parts of cellulases, 5 parts in Repone K, 67 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 350,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
The preparation method of present embodiment is with embodiment 1.
Embodiment 3
The raw material of present embodiment consists of: 35 parts of dimethyl 2 allyl ammonium chlorides, 5 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-105 part, 1 part of non-ion fluorin surfactant, 1 part of cellulase, 5 parts in Repone K, 48 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 450,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
The preparation method of present embodiment is with embodiment 1.
Embodiment 4
The raw material of present embodiment consists of: 25 parts of dimethyl 2 allyl ammonium chlorides, 4 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-104 part, 1 part of non-ion fluorin surfactant, 2 parts of cellulases, 5 parts in Repone K, 59 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 500,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
The preparation method of present embodiment is with embodiment 1.
Embodiment 5
The raw material of present embodiment consists of: 28 parts of dimethyl 2 allyl ammonium chlorides, 3 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-103 part, 2 parts of non-ion fluorin surfactants, 2 parts of cellulases, 5 parts in Repone K, 57 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 1,000,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
The preparation method of present embodiment is with embodiment 1.
Embodiment 6
The raw material of present embodiment consists of: 20 parts of dimethyl 2 allyl ammonium chlorides, 3 parts of dimethyl 2 allyl ammonium chlorides-acrylamide polymer, nonionogenic tenside OP-102 part, 2 parts of non-ion fluorin surfactants, 3 parts of cellulases, 1 part in Repone K, 69 parts in water; The molecular weight of described dimethyl 2 allyl ammonium chlorides-acrylamide polymer is 50,000, and described non-ion fluorin surfactant is fluorine-containing alkyl ethoxy ether alcohol nonionogenic tenside SUNF-01, and described cellulase is cellulase SUNWEE-010.
The preparation method of present embodiment is with embodiment 1.
Consumption of the present invention following (the medicament dosage all refers to the mass ratio of medicament in drilling mud):
1, such as about 3000 meters conventional well, temperature is about 100 ℃, and the suggestion dosage is between 0.05%-0.15%; The conventional well of 5000m, temperature are in 150 ℃, and the suggestion dosage is between 0.1%-0.2%.
2, the bad ground well is in 3000 meters, and it is more serious to collapse, and dosage should be at 0.1%-0.2%; The well of 5000m, temperature are in 150 ℃, and dosage should be between 0.2%-0.4%.
3, the method for Jia Ruing: directly add in the drilling fluid, should accomplish as far as possible to add evenly, just can reach best effects.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101510542A CN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101510542A CN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
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| CN101362938A CN101362938A (en) | 2009-02-11 |
| CN101362938B true CN101362938B (en) | 2010-11-10 |
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| CN2008101510542A Expired - Fee Related CN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693829B (en) * | 2009-10-28 | 2012-09-05 | 中联煤层气国家工程研究中心有限责任公司 | Pulverized coal dispersing agent and active water fracturing fluid for fracturing of coal bed gas well |
| CN103013482B (en) * | 2013-01-16 | 2014-07-23 | 天津塘沽海德科技有限公司 | Composite well wall stabilizer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1243749A1 (en) * | 2001-03-20 | 2002-09-25 | Clearwater, Inc. | Treating shale and clay in hydrocarbon producing formations |
| CN1403532A (en) * | 2002-10-01 | 2003-03-19 | 胜利油田方圆科工贸有限责任公司化工分公司 | Composite sand-proof material for oil-water well and its preparation |
| CN1847358A (en) * | 2006-05-11 | 2006-10-18 | 大庆沃太斯采油工程技术研究所 | Low damage high temperature and high pressure well completion fluid for use in oil field |
-
2008
- 2008-09-23 CN CN2008101510542A patent/CN101362938B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1243749A1 (en) * | 2001-03-20 | 2002-09-25 | Clearwater, Inc. | Treating shale and clay in hydrocarbon producing formations |
| CN1403532A (en) * | 2002-10-01 | 2003-03-19 | 胜利油田方圆科工贸有限责任公司化工分公司 | Composite sand-proof material for oil-water well and its preparation |
| CN1847358A (en) * | 2006-05-11 | 2006-10-18 | 大庆沃太斯采油工程技术研究所 | Low damage high temperature and high pressure well completion fluid for use in oil field |
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| CN101362938A (en) | 2009-02-11 |
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