CN103045203A - High-density water-based drilling fluid saturated salt water mixture - Google Patents
High-density water-based drilling fluid saturated salt water mixture Download PDFInfo
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- CN103045203A CN103045203A CN 201110325956 CN201110325956A CN103045203A CN 103045203 A CN103045203 A CN 103045203A CN 201110325956 CN201110325956 CN 201110325956 CN 201110325956 A CN201110325956 A CN 201110325956A CN 103045203 A CN103045203 A CN 103045203A
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Abstract
The invention discloses a high-density water-based drilling fluid saturated salt water mixture which comprises the following components in percentage by weight: 3-5 percent of sodium bentonite slurry, 0.4-0.6 percent of PAC-HV (poly anion cellulose-HV), 7-9 percent of SMP-2 (sulfonated phenolic resin), 4.0-6.0 percent of SPNH (resinated lignite), 4.0-6.0 percent of PSC-I, 4.0-6.0 percent of SPC, 4.0-6.0 percent of FT-1 (sulfonated asphalt), 2.0-4.0 percent of CaCO3, 1.0-3.0 percent of TRH-2, 6-8 percent of KCl, 20-30 percent of NaCl, 0.5-1.5 percent of SP-80 (emulsifier), 0.4-0.6 percent of organic molybdenum anti-friction composition and the balance of compound weighting agent. According to the invention, through changing the proportion of components, the whole system is increased in density relative to the existing the drilling liquid, and the demand of actual drilling is met.
Description
Technical field
The present invention relates to a kind of mixture, specifically refer to a kind of high-density water-based drilling fluid saturated brine mixture.
Background technology
Along with the development of World Oil Industry, constantly widen the oil gas drilling developing zone, probing exploitation just gradually by shallow-layer to Deep Development, tectonic structure is increasingly sophisticated, drilling depth constantly increases, and has higher requirement for needed drilling fluid, to satisfy the growing of petroleum industry.
At present, in the Petroleum Exploration in China exploitation, deep-well will be the emphasis of from now on exploratory development.In the drilling operation that bar assorted suddenly district in Xinjiang carries out, because reservoir buries relatively deeply, reservoir pressure changes greatly, complex lithology is changeable, probing is difficulty comparatively, and timeliness is low, and cost is high.Be embodied in: deep-well downhole temperature and pressure are high, complex formation, sometimes bore and meet the ultra-high voltage brine layer, complicated saline bed and cream mud stone, the conventional drilling liquid system is difficult to solve the drilling fluid high solid loading, the filtrate high salinity, unstable properties, filter loss is crossed high technical barrier, Creep of gypsum often occurs in the wellbore construction process, hole instability, easily spray leakiness, the down-hole complex accident such as tight trip and easy bit freezing, simultaneously because salt dissolving in stratum causes hole diameter to enlarge, have a strong impact on wellbore quality, bring great difficulty to oil gas drilling, seriously hamper the oil-gas exploration process; When using high density drilling fluid to creep into, drilling fluid flows, and property is poor, mud cake is thick, filter loss is large, solids removal is difficult, property of drilling fluid is difficult to safeguard; Along with the increase of well depth, ground temperature is more and more higher, and drilling fluid is under the hot conditions of shaft bottom, and the treatment agent degraded is accelerated, and dehydration increases considerably, and causes drilling fluid viscosity to increase or curing, hole instability etc.Simultaneously because the deep formation complicated geology, the problem that deep drilling will run into inevitably many cover pressure series of strata stratum and deposit, how safety is crept into many cover pressure series of strata stratum, carry out the leak-proof leak-stopping of deep formation drilling process, improve Formation bearing pressure, be the key that safety is crept into deep ﹠ ultra-deep well, this has proposed higher requirement to Drilling Fluid Technology.
Deep drilling has proposed challenge not only for existing drilling fluid system; also proposed a lot of new problems for simultaneously the drilling liquid technology of protection hydrocarbon zone; therefore to successfully carry out exploratory development; must there be the drilling liquid technology of high-quality to ensure; require drilling fluid to have: high-temperature stability, good oilness and shear thinning behavior; the low rheological of solid load is good, the high pressure fluid loss is low, the pollution of anti-various solubility salts and sour gas, is conducive to prepare, process, safeguard and alleviate formation contaminant.
The development of China's high temperature resistance Drilling Fluid Technique for Deep technology is broadly divided into calcium treated drilling fluid, sulfonated drilling fluid and sulphonated polymer mud three phases.
(1) calcium treated drilling fluid
Calcium treated drilling fluid is the basic Drilling Fluid Technique for Deep type that China used to early seventies in the sixties, mainly utilize inorganic calcium salt (Ca (OH) 2) or sodium salt (NaCl) to improve hole stability, add in addition feero-chromo-lignosulfonate (FCLS) or coal-alkali reagent (NaC), carboxymethyl cellulose (CMC) and some tensio-active agents etc. are kept the rheological property of drilling fluid.All be to be drilled to merit with this class drilling fluid such as loose Ji Jing (calcium base), east wind 2 wells (calcium base), New Port 57 wells (saline based), Wang Shen 2 wells (saturated salt is water base) etc.
(2) three sulphur drilling fluids
Three sulphur drilling fluids are employed drilling fluid types of the most of deep-wells of China after the seventies, and so-called " three sulphur " namely is sulfonated phenol formaldehyde resin (SMP), sulfonated lignite (SMC) and sulfonation mimosa extract (SMK).These three kinds for the treatment of agents have reduced the high temperature and high pre ssure filtration of drilling fluid effectively, and then improved " hole stability ", Sichuan Petroleum Administration cooperates FCLS, CMC, Ca (OH) 2 and potassium bichromate (K2Cr2O7), tensio-active agent etc. to be drilled to the darkest pass Ji Jing (7175m) of China, women Ji Jing (6011m) with these three kinds for the treatment of agents again.Succeeding in developing of three sulphur drilling fluids, that China is at the technical much progress of Drilling Fluid Technique for Deep, its item key is: these three kinds for the treatment of agents can reduce high temperature and high pre ssure filtration effectively, after particularly adding sulfonated phenol formaldehyde resin, increase along with well depth and pressure reduction, its filter loss increase seldom, sometimes also reduce (and this characteristic is that former calcium treated drilling fluid system is inaccessible), so just greatly hang down and improved mud cake quality, reduce the complexcase such as the bit freezing that caves in of down-hole, improved the success ratio of deep drilling exploration.For example, at 4700～5335m, adding to the bentonite slurry that contains 10%: SMP4%, SMC6%, SP-80 promoting agent 0.3%, AS (alkyl sodium sulfonate) 0.15%, Na when creeping into from dark 1 well (Sichuan)
2Cr
2O
72%, behind the diesel oil 5%, under the 192 ℃ of temperature in shaft bottom, the 23.7ml that its filter loss never adds SMP drops to 9.6ml, frictional coefficient (Kf/45min) 0.07.Through five drillling tool twisting offs, three cementing plugs, bit freezing does not all occur in a percussion drill accident.For China's Drilling Fluid Technique for Deep technology has been started new situation.
(3) the sulphonated polymer mud stage
So-called " sulphonated polymer mud " refers in practice process will " polymer drilling fluid " and " three sulphur drilling fluids " to combine and the class system that forms, at present still widespread use " polymer drilling fluid ", begin to cry " not disperseing low solids polymer drilling fluid ", be at the later stage seventies, the initial stage eighties, utilize propylene phthalein amine organic polymer as the inhibitor of drilling fluid and develop gradually a kind of drilling fluid system that forms in order to promote " jetting drilling technology " and " drilling with optimized parameter technology ".This class drilling fluid is owing to used the organic polymer of long-chain to replace the inorganic salt inhibitor that uses in the former calcium treated drilling fluid, thereby effectively suppressed the pulping on stratum, improve widely hole stability, seen significant effect aspect the raising drilling speed.The product of this class organic polymer is many have been succeeded in developing.From initial non-hydrolysis, partial hydrolysis polypropylene phthalein amine, develop into the composite of large, medium and small molecular weight, derivative or the graft copolymer of different functional groups (calcium, sodium, ammonium salt) and expand vinylsulfonate, vinyl pyrrolidone to and with polymkeric substance of Cationic functional groups etc.
Although this series products has outstanding inhibition to the higher stratum of control smectite content, can't be adapted at present the use of deep-well.Tackle especially the stratum of hard fragility, also must add some sulfonated bodiess and come improvement of mud cake to reduce high temperature and high pre ssure filtration.Therefore very naturally these two kinds of compositions are combined and formed " sulphonated polymer mud ".
Summary of the invention
Purpose of the present invention is in order to overcome the deficiencies in the prior art and defective, a kind of high-density water-based drilling fluid saturated brine mixture is provided, this mixture passes through to change the component ratio, thereby so that whole system increases with respect to existing drilling fluid density, has satisfied the demand of actual well drilled.
Purpose of the present invention is achieved through the following technical solutions: a kind of high-density water-based drilling fluid saturated brine mixture, according to the mass percent meter, comprise 3%～5% sodium bentonite slurry, 0.4%～0.6%PAC-HV, 7%～9%SMP-2,4.0%～6.0%SPNH, 4.0%～6.0%PSC-I, 4.0%～6.0%SPC, 4.0%～6.0%FT-1,2.0%～4.0%CaCO
3, 1.0%～3.0%TRH-2,6%～8%KCl, 20%～30%NaCl, 0.5%～1.5%SP-80,0.4%～0.6% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
As a kind of optimal way of the present invention: according to the mass percent meter, comprise 4% sodium bentonite slurry, 0.5%PAC-HV, 8%SMP-2,5.0%SPNH, 5.0%PSC-I, 5.0%SPC, 5.0%FT-1,3.0%CaCO
3, 2.0%TRH-2,7%KCl, 25%NaCl, 1.0%SP-80,0.5% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
As another kind of optimal way of the present invention: according to the mass percent meter, comprise 3% sodium bentonite slurry, 0.4%PAC-HV, 7%SMP-2,4.0%SPNH, 4.0%PSC-I, 4.0%SPC, 4.0%FT-1,2.0%CaCO
3, 1.0%TRH-2,6%KCl, 20%NaCl, 0.5%SP-80,0.4% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
As the third optimal way of the present invention: according to the mass percent meter, comprise 5% sodium bentonite slurry, 0.6%PAC-HV, 9%SMP-2,6.0%SPNH, 6.0%PSC-I, 6.0%SPC, 6.0%FT-1,4.0%CaCO
3, 3.0%TRH-2,8%KCl, 30%NaCl, 1.5%SP-80,0.6% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
The density reachable of the high-density water-based drilling fluid saturated brine mixture that is made by aforementioned proportion is to 2.60g/cm
3～2.70g/cm
3
In sum, the invention has the beneficial effects as follows: by change component ratio, thereby so that whole system increases with respect to existing drilling fluid density, satisfied the demand of actual well drilled.
Embodiment
Below in conjunction with embodiment, to the detailed description further of the present invention's do, but embodiments of the present invention are not limited to this.
Embodiment 1:
Present embodiment relates to a kind of high-density water-based drilling fluid saturated brine mixture, according to the mass percent meter, comprises 4% sodium bentonite slurry, 0.5%PAC-HV, 8%SMP-2,5.0%SPNH, 5.0%PSC-I, 5.0%SPC, 5.0%FT-1,3.0%CaCO
3, 2.0%TRH-2,7%KCl, 25%NaCl, 1.0%SP-80,0.5% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
Embodiment 2:
Present embodiment relates to a kind of high-density water-based drilling fluid saturated brine mixture, according to the mass percent meter, comprises 3% sodium bentonite slurry, 0.4%PAC-HV, 7%SMP-2,4.0%SPNH, 4.0%PSC-I, 4.0%SPC, 4.0%FT-1,2.0%CaCO
3, 1.0%TRH-2,6%KCl, 20%NaCl, 0.5%SP-80,0.4% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
Embodiment 3:
Present embodiment relates to a kind of high-density water-based drilling fluid saturated brine mixture, according to the mass percent meter, comprises 5% sodium bentonite slurry, 0.6%PAC-HV, 9%SMP-2,6.0%SPNH, 6.0%PSC-I, 6.0%SPC, 6.0%FT-1,4.0%CaCO
3, 3.0%TRH-2,8%KCl, 30%NaCl, 1.5%SP-80,0.6% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and any simple modification, the equivalent variations on every foundation technical spirit of the present invention above embodiment done all fall within protection scope of the present invention.
Claims (4)
1. high-density water-based drilling fluid saturated brine mixture, it is characterized in that, according to the mass percent meter, comprise 3%～5% sodium bentonite slurry, 0.4%～0.6%PAC-HV, 7%～9%SMP-2,4.0%～6.0%SPNH, 4.0%～6.0%PSC-I, 4.0%～6.0%SPC, 4.0%～6.0%FT-1,2.0%～4.0%CaCO
3, 1.0%～3.0%TRH-2,6%～8%KCl, 20%～30%NaCl, 0.5%～1.5%SP-80,0.4%～0.6% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
2. a kind of high-density water-based drilling fluid saturated brine mixture according to claim 1 is characterized in that, according to the mass percent meter, comprises 4% sodium bentonite slurry, 0.5%PAC-HV, 8%SMP-2,5.0%SPNH, 5.0%PSC-I, 5.0%SPC, 5.0%FT-1,3.0%CaCO
3, 2.0%TRH-2,7%KCl, 25%NaCl, 1.0%SP-80,0.5% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
3. a kind of high-density water-based drilling fluid saturated brine mixture according to claim 1 is characterized in that, according to the mass percent meter, comprises 3% sodium bentonite slurry, 0.4%PAC-HV, 7%SMP-2,4.0%SPNH, 4.0%PSC-I, 4.0%SPC, 4.0%FT-1,2.0%CaCO
3, 1.0%TRH-2,6%KCl, 20%NaCl, 0.5%SP-80,0.4% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
4. a kind of high-density water-based drilling fluid saturated brine mixture according to claim 1 is characterized in that, comprises 5% sodium bentonite slurry, 0.6%PAC-HV, 9%SMP-2,6.0%SPNH, 6.0%PSC-I, 6.0%SPC, 6.0%FT-1,4.0%CaCO
3, 3.0%TRH-2,8%KCl, 30%NaCl, 1.5%SP-80,0.6% organic-molybdenum anti-friction composition, surplus is compound weighting agent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774504A (en) * | 2018-08-07 | 2018-11-09 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of water-base drilling fluid and preparation method thereof suitable for saline bed |
-
2011
- 2011-10-13 CN CN 201110325956 patent/CN103045203A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108774504A (en) * | 2018-08-07 | 2018-11-09 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of water-base drilling fluid and preparation method thereof suitable for saline bed |
| CN108774504B (en) * | 2018-08-07 | 2021-06-18 | 中国石油天然气集团有限公司 | Water-based drilling fluid suitable for salt-gypsum layer and preparation method thereof |
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Application publication date: 20130417 |