CN103013471A - Method for drilling well by using UDM-1 unconventional well-drilling fluid system - Google Patents
Method for drilling well by using UDM-1 unconventional well-drilling fluid system Download PDFInfo
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Abstract
The invention provides a method for drilling well by using a UDM-1 unconventional well-drilling fluid system. The UDM-1 unconventional well-drilling fluid system comprises the following raw materials: an agent CX-178, an agent CX-179, an agent CX-189, an agent CX-191, an agent CX-307 and an agent CX-144B. The agent CX-178 is prepared from 45-55 parts by weight of sulfonated-pheno-formoldehyde resin SMP-III and 47-53 parts by weight of chromium-free sodium lignin sulfonate; the agent CX-179 is prepared from 85-93 parts by weight of sulfonated tannin and 8-12 parts of chromium-free diluent; the agent CX-189 is prepared from 15-23 parts by weight of sulfonated asphalt FT-1, 25-32 parts by weigh of diesel, 4-6 parts by weight of emulsifier OP-10, 28-33 parts by weight of walchowite SPNH28 and 12-17 parts by weight of tap water; the agent CX-191 is prepared from 89-97 parts by weight of low-viscosity sodium carboxymethyl cellulose (LV-CMC), 3-6 parts of zwitterionic coating agent FA-367; the agent CX-307 is prepared from 90-97 parts by weight of barite powder with the density being larger than 4.30g/cm<3> and 3-6 parts by weight of potassium bromide; and the agent CX-144B is prepared from 75-85 parts by weight of polyacrylamide with the molecular weight being 3 million and 18-22 parts by weight of 80A51. The UDM-1 unconventional well-drilling fluid system comprises the formula for resisting high temperature, high density and combined pollution of slurry and the formula for the stratum structure. The injection method of the agents is characterized by reflowing to a slurry tank from a vibrating sieve to circulate until the end of drilling of the well. The addition of the assistants lasts for 2-3 hours, and the addition of the polymers lasts for 4-5 hours.
Description
Technical field
The present invention relates to the drilling technique in the oilfield explorating developing process, the especially selection of drilling fluid and use, this drilling fluid and mud liquid compound system, the effect that the drilling well high temperature resistance of dark oil, anti-high-density, anti-plyability are polluted is very remarkable.
Background technology
The present invention is directed to the ultrahigh-temperature ultra-high voltage geologic condition that may bore chance in front of the mountains and compound saline bed and the ooze shale bed that has large section, be badly in need of research and development one cover ultrahigh-temperature, the resistant to pollution water-based drilling liquid system of ultra-high voltage, this also is difficult point and the focus of domestic and international deep drilling Technology.
The method uses the high-density ground barium sulfate to increase the weight of, and its drilling fluid high comprehensive performance, temperature resistance reach as high as 240 ℃, density 2.50g/cm more than 220 ℃
3, reach as high as 2.70g/cm
3It has the preferably ability of anti-salt calcium (rock salt gypsum and cement), anti-stick soil pollution, in the coordinating and unifying of having satisfied preferably under corresponding temperature and the density conditions between drilling fluid rheology, inhibition, building capacity, oilness, the high-temperature stability, it is the strong inhibition water-base drilling fluid method of a cover high-quality, can satisfy the drilling geology requirement of various height and ultra high temp and pressure Holes of Complicated Wells, significantly promote the exploratory development level and accurate ability of enterprise.
Summary of the invention
The object of the invention is to: the drilling fluid system that provides and its mud are compound, still guarantee good property of drilling fluid under the ultra deep well complexcase, and important probing value and application prospect are namely arranged.
The present invention seeks to realize like this: the unconventional drilling fluid system of a kind of UDM-1 is used for the boring method of deep-well, raw material is prepared with parts by weight, its combined drilling liquid system that is numbered CX-178, CX-179, CX-189, CX-191, CX-307, CX-144B had both been improved the extreme disposal situation of mud liquid, optimized again the environment of stratigraphic structure, made drilling technique be able to sufficient embodiment;
(1) preparation process of drilling fluid additive:
CX-178 drilling fluid additive: formed by sulfonated-pheno-formoldehyde resin SMP-III 45-55 part, Chrome-free calcium lignin sulphonate 47-53 part;
CX-179 drilling fluid additive: formed by sulfonation tannin 85-93 part, Chrome-free thinner 8-12 part;
CX-189 drilling fluid additive: formed by sulfonated gilsonite FT-1 15-23 part, diesel oil 25-32 part, emulsifier op-10 4-6 part, valchovite SPNH 28-33 part, tap water 12-17 part;
CX-191 drilling fluid additive: formed by low sticking Xylo-Mucine LV-CMC 89-97 part, zwitter-ion coating agent FA-367 3-6 part;
CX-307 drilling fluid additive: by density 〉=4.30g/cm
3Ground barium sulfate 90-97 part, Potassium Bromide 3-6 part form;
CX-144B drilling fluid additive: formed by 300 sub-very much weight polyacrylamide 75-85 parts, 80A51 18-22 part;
With above-mentioned drilling fluid additive prepare respectively the packing stand-by; Its method: raw material is placed reactor, and stirring is 30-60 minute under normal temperature, normal pressure, mixes to get final product;
(2) for the disposal of mud liquid high temperature resistance, anti-high-density, anti-combined pollution
A prescription: [8% protects rubber cement (soil paste as 8%+3%CX-178+0.3%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH): 4:1)=and 1:2]+1%CX-191+CX-178+3%KOH+ CX-189+0.5%SP-80+0.5% zinc subcarbonate+7%KCl+15%NaCl+1%YX-1+1%YX-2+ CX-307;
B prescription: [4% protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH): 4:1)=and X:Y]+1%CX-191+CX-178+4%CX-189+0.5%SP-80+7%KCl+CX-307;
C prescription: 300ml glue [4% protect rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%]: CX-179 alkali lye (concentration: 20%; Alkali is than (CX-179:KOH): 3:1)=and 1:3]+CX-191+CX-178+3%KOH+10%CX-189+0.3%SP-80+7%KCl+25%NaCl+1% YX-1+1%YX-2+2%CaSO
4+ 850gCX-307+ landwaste powder;
D prescription: the 300ml glue [protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%): CX-179 alkali lye (concentration: 20%; Alkali is than (CX-179:KOH): 3:1)=and 1:3]+1.5%CX-191+CX-178+3%KOH+8%CX-189+0.5%CaO+7%KCl+25%NaCl+2 %CaSO
4+ 850gCX-307+ landwaste powder;
Wherein the volume in a, b, c, the d prescription is pressed the glue volume calculation;
(3) for the disposal of stratigraphic structure
Prescription for Quaternary system: add soil paste 3-7%, NaOH 0.1-0.3%, CX-144B 0.3-0.8%, CX-127 0.2-0.5%, CX-189 1-2%, mix;
Prescription for Neogene System-Carboniferous system: add soil paste 2-3%, NaOH 0.2-0.5%, CX-144B 0.1-0.2%, CX-178 3-7%, CX-189 3-7%, KCl5-7%, NaCl5-20%, mix;
Prescription for the Devonian system: soil paste 2-3%, NaOH 0.3-0.5%, CX-178 3-5%, CX-189 3-5%, oil layer protective agent 2-4% mix.
(4) injection mode of drilling fluid additive: soil paste is beaten with pump and was annotated in the mud tank aquation 2-3 days as will newly joining, add auxiliary agent by the mud tank extraction through slush pump again and stir, inject into well, in well, return out, flow back to the mud tank circulation through vibratory screening apparatus, until finishing drilling; The 2-3 hour adding time spent of auxiliary agent, polymkeric substance added time spent 4-5 hour; The continuously stirring speed of mud tank is that 200-300 turns/r, and the mud tank temperature is at 40-50 ℃.
UDM-1 mud system of the present invention has the progress of great-leap-forward than sulfonation mud system at aspects such as High Temperature High Pressure dehydration, rheological control, temperature resistance abilities, super-high density salty mud temperature resistance ability is brought up to 180 ℃ from 130 ℃, High Temperature High Pressure dehydration, mud cake, rheological are adjustable controlled under 180 ℃ of hot conditionss, have fundamentally solved the technical barriers such as the serious blocked portion of super dark saline bed ultra-high voltage oil-gas-water layer, pressure differential sticking; This technology has been created the new record of salty mud Application density, temperature and the degree of depth.
The present invention adopts drilling fluid system to the disposal characteristics of geologic framework:
Stratal configuration: the Triassic system above (i.e. four series of strata): 1. must join soil paste with fresh water, and guarantee more than the hydration time 16h; 2. filling up CX-144B and CX-127 disperses with the effectively coated drilling cuttings that suppresses; 3. control is low sticking cuts and suitably relaxes dehydration; 4. control drilling fluid solid load inferior minimum; 5. guarantee that property of drilling fluid is stable.
Stratal configuration: the Triassic system～Carboniferous system (containing the Carboniferous system): 1. 4. the same and 5.; 2. according to down-hole situation control drilling fluid density, sticking cutting and dehydration; 3. focus on density control, especially the Permian system must lean on the design upper limit; 4. for anti-Underwell leakage, fill up CX-189, be used in conjunction with ultrafine calcium; 5. be anti-ball-up, must control minimum solid phase inferior in the drilling fluid, near the drilling cuttings concentration of the annular space drill bit is down to minimum and anti-drilling fluid flows backwards.
Stratal configuration: below the Carboniferous system: 1. leakproof is its emphasis, the one, must guarantee that property of drilling fluid is stable; The 2nd, fill up various plugging agents, improve drilling fluid and form filter cake to the shut-off capacity on stratum; 2. protecting hydrocarbon zone is an emphasis, and it safeguards that treatment process and leakproof are basically identical.
The technique effect checking of drilling fluid system of the present invention:
This wellbore fluid ties up under 220 ℃ of hot conditionss aging after 36 hours, and the drilling fluid high-temperature high pressure filter loss is less, and preferably rheological is arranged, and shows that this drilling fluid system heat-resisting ability is strong.
This drilling fluid system density is added to 2.66g/cm
3, after aging under 180 ℃ of hot conditionss, still have preferably rheological.
This wellbore fluid ties up to 170 ℃ of high temperature, 2.35g/cm
3High-density, 8% landwaste pollutional condition under, anti-salt, anti-gypsum be to saturated, drilling fluid still has lower high temperature and high pre ssure filtration and rheological preferably, shows that the anti-combined pollution ability of this drilling fluid is strong.
Drilling fluid system of the present invention design is take the compound prescription of mud liquid as the guide, when the ultra deep well complexcase, guarantee good property of drilling fluid, thereby reach the beneficial effect of " three is anti-" under high temperature resistance, anti-high-density, the anti-combined pollution condition, drilling technique is stable, supportingly lower cost with recycling, shown technical progress.
Description of drawings
The present invention contrasts accompanying drawing and is described further.
Accompanying drawing 1 adds the schematic flow sheet of drilling fluid additive when being used for drilling well for this system;
As shown in the figure: mud liquid pump in the well is entered mud tank, aquation 2-3 days, namely 1
#, 2
#, 3
#Mud tank recycles; Then add drilling fluid additive, mud liquid is injected into well by pump through stirring again, and recycles until finishing drilling.
Accompanying drawing 2 is for polluting the comparison schematic diagram that adds respectively different auxiliary agents in the high density drilling fluid at gypsum.
Accompanying drawing 3 is for to break the battle array figure of salt pollution high density drilling fluid structure at several thinners.
Embodiment
Control Example of the present invention is described further.
Embodiment
One, the preparation of drilling fluid
CX-178 drilling fluid additive prescription: get by 50 parts of sulfonated-pheno-formoldehyde resin SMP-III, 53 parts of Chrome-free calcium lignin sulphonates with parts by weight, drop into successively reactor, under normal temperature, normal pressure, stirred 30 minutes, mix packing;
CX-189 drilling fluid additive prescription: get 23 parts of sulfonated gilsonite FT-1,32 parts of diesel oil, 6 parts of emulsifier op-10s, 33 parts of valchovite SPNH, 17 parts in tap water with parts by weight, drop into successively reactor, under normal temperature, normal pressure, stirred 1 hour, mix packing;
CX-191 drilling fluid additive prescription: get 90 parts of low sticking Xylo-Mucine LV-CMC, 5 parts of compositions of zwitter-ion coating agent FA-367 with parts by weight, drop into successively reactor, under normal temperature, normal pressure, stir and mixed packing in 30 minutes;
CX-179 drilling fluid additive prescription: get 90 parts of sulfonation tannin, 10 parts of Chrome-free thinners with parts by weight, drop into successively reactor, under normal temperature, normal pressure, stirred 30 minutes, mix packing;
CX-307 drilling fluid additive prescription: get density 〉=4.30g/cm with parts by weight
35 parts of compositions of 95 parts of ground barium sulfates, Potassium Bromide, drop into successively reactor, under normal temperature, normal pressure, stirred 30 minutes, mix packing;
CX-144B drilling fluid additive prescription: get 3,000 80 parts of sub-very much weight polyacrylamides, 20 parts of compositions of 80A51 with parts by weight, drop into successively reactor, under normal temperature, normal pressure, stirred 30 minutes, mix packing.
Two, drilling fluid system is for the disposal of the high temperature of mud liquid, high-density, combined pollution
1 prescription: [8% protects rubber cement (soil paste as 8%+3%CX-178+0.3%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH) 4:1)=1:2]+1%CX-191+CX-178+3%KOH+ CX-189+0.5%SP-80+0.5% zinc subcarbonate+7%KCl+15%NaCl+1%YX-1+1%YX-2+ CX-307 (volume is pressed the glue volume calculation);
Pass through to change the dosage of CX-178, CX-189, CX-307 in the upper step prescription, extend different prescriptions, the addition sequence for the treatment of agent is undertaken by sequential write in the prescription, then under 160 ℃, 180 ℃, 200 ℃, 220 ℃ conditions, carry out respectively 36 hours aging rollings, in 50 ℃ of rheologicals of measuring drilling fluids and high temperature and high pre ssure filtration (measure temperature be aging temperature 80%).Prescription, experimental data and the results are shown in Table 1.
Table 1 drilling fluid temperature resistance prescription and experimental data
Data by upper table are learnt: this drilling fluid system heat was rolled 36 hours, and aging temperature reaches 220 ℃, by changing the dosage of CX-178, CX-179, still had preferably rheological and lower high temperature and high pre ssure filtration.
2 prescriptions: [4% protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH) 4:1)=X:Y]+1%CX-191+CX-178+4%CX-189+0.5%SP-80+7%KCl+CX-307 (volume is pressed the glue volume calculation);
X, Y represent undetermined value in the upper step prescription, protect the ratio of rubber cement and CX-179 alkali lye and the dosage of change CX-178, CX-307 by adjustment, extend different prescriptions, the addition sequence for the treatment of agent is undertaken by sequential write, after 180 ℃ of aging rollings 8 hours, in 50 ℃ of rheologicals of measuring drilling fluids, prescription, experimental data and the results are shown in Table 2.
Learnt by upper table data: UDM-1 drilling fluid high-density prescription protects rubber cement and CX-179 alkali lye by adjustment ratio, drilling fluid density is added to 2.66g/cm
3, still have preferably rheological.
A prescription: 300ml glue [4% protect rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%]: CX-179 alkali lye (concentration: 20%; The alkali ratio: CX-179:KOH=3:1)=1:3]+CX-191+CX-178+3%KOH+10%CX-189+0.3%SP-80+7%KCl+25%NaCl+1% YX-1+1%YX-2+2%CaSO
4+ 850gCX-307+ landwaste powder (volume is pressed the glue volume calculation);
B prescription: the 300ml glue [protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%): CX-179 alkali lye (concentration: 20%; Alkali is than (CX-179:KOH) 3:1)=1:3]+1.5%CX-191+CX-178+3%KOH+8%CX-189+0.5%CaO+7%KCl+25%NaCl+2 %CaSO
4+ 850gCX-307+ landwaste powder (volume is pressed the glue volume calculation);
By changing the dosage of CX-178, CX-191, landwaste powder, extend different prescriptions, B in the A prescription
#Prescription is by changing the dosage of CX-178, landwaste powder, extend different prescriptions, the addition sequence for the treatment of agent is undertaken by sequential write, then under 170 ℃ of conditions, rolled aging 36 hours, 50 ℃ of rheologicals of measuring drilling fluid, it is 80% of aging temperature that high temperature and high pre ssure filtration is measured temperature, and observed temperature is 140 ℃, prescription, experimental data and the results are shown in Table 3.
Learnt by upper table data:: the A serial anti-2%CaSO that fills a prescription
4, behind the 8% landwaste powder, it is moderate that drilling fluid sticking cuts, but high temperature and high pre ssure filtration is bigger; The B serial anti-2%CaSO that fills a prescription
4, behind the 8% landwaste powder, it is moderate that drilling fluid sticking cuts, high temperature and high pre ssure filtration is less.
Three, drilling fluid system is for the disposal of stratal configuration
Quaternary system: add soil paste 5%, NaOH 0.2%, CX-144B 0.5%, CX-127 0.3%, CX-189 2%, mix;
Neogene System-Carboniferous system: add soil paste 3%, NaOH 0.4%, CX-144B 0.2%, CX-178 5%, CX-189 6%, KCl7%, NaCl10%, mix;
The Devonian system: soil paste 2-3%, NaOH 0.3%, CX-178 4%, CX-189 5%, oil layer protective agent 3% mix.
Above-mentioned working method is beaten soil paste as newly joining and was annotated in the mud tank aquation 3 days with pump, extracted out by mud tank to add auxiliary agent through slush pump and stir again, and injects into well, and returns out in well, flows back to the mud tank circulation through vibratory screening apparatus, until finishing drilling; 2 hours adding times spent of auxiliary agent, polymkeric substance adds 4 hours times spent; The continuously stirring speed of mud tank is 300 to turn/r, and the mud tank temperature is generally at 45 ℃.
Four, this drilling fluid system is to the checking of deep drilling effect
That the 204 well test of I enlightening
The drilling engineering effect
A. begin the completion to 5380m from well depth 3996m drilling out, whole drilling process occurs without the blocked portion situation, and electrical measurement, running casing and well cementation work safety are smooth.
B. that 204 well of enlightening is from 3996m to completion well depth 5380m, completion time 159d; Face that 202 well of well enlightening from 4750m to completion well depth 5330m, completion time 261d, namely that 204 well of enlightening creeps at gypsum-salt bed and zone of interest than that 202 well of enlightening and has saved 102d, and drilling well direct saving cost surpasses 5,000,000 yuan (seeing Table 4).
C. gypsum-salt bed (311.15mm well) and zone of interest (216mm well) diameter enlargement ratio are respectively 1.42% and 1.41%.
The Drilling Fluid Technology effect
A. drilling fluid has preferably contamination resistance, creeps into the pulping shale layer at gypsum-salt bed and creeps into, its property of drilling fluid good stable;
B. about Marsh funnel 60s, mould about sticking 10mPas, the only 1～2Pa that ingresses, about egress 10Pa, therefore surge pressure and suction function are little, annular pressure lost hangs down and extremely is conducive to the drilling well of high pressure window gas-bearing formation.
Drilling fluid is to the wear pattern of equipment
That 204 well of the enlightening of this test begins the completion to 5380m from well depth 3996m drilling out, and 159d has only used two wearing bush, and mild wear is arranged, and changes 18 valves and puies forward drilling tool eccentric wear free phenomenon; Carat 4 wells use powdered iron ore weighted drilling fluid, density 2.30g/cm
3, repair about pump 2h average every day, changed 7 valves in the 10d and put forward the steel bushing serious wear; West autumns 2 well uses powdered iron ore to increase the weight of drilling fluid density 2.26 g/cm
3, the drilling tool eccentric wear, the 127mm drilling coupling is little of 115mm from the 127mm mill behind the 363h; That 203 well of enlightening uses powdered iron ore to increase the weight of drilling fluid density 2.27g/cm
3, drilling rod heavy wear, many drilling rods exist eccentric wear, stress groove polishing phenomenon, the monolateral 10mm of greatest wear.
Geological effect
This well is asked product with the 6mm oil nozzle, day produce oil 18.51m
3, daily gas 25.3 * 10
2* 10
2m
3, illustrate that this system has better protecting hydrocarbon zone effect.
II, large Bei301Jing test
This well 5530-6914 rice composite salt interval is extremely complicated, and wherein 5578-5993 rice well section has been concentrated 3 drop plies and a surpressure brine layer (Ca in the salt solution
2+Content reaches 22500ppm), for balance high pressure water layer, need to use density up to 2.55g/cm
3Drilling fluid cooperate engineering to solve kill-job, leak stopping, preparation releasing stuck agent, the complicated difficult problem such as creep into.
This well is by using UDM-1 high temperature high density drilling fluid system, and under the prerequisite of having kept the good rheological of drilling fluid and low dehydration, a difficult problem that has solved preferably high pressure water layer and drop ply and deposited is smoothly with 8 1/8 " sleeve pipe is down to 6901 meters.The drilling fluid over-all properties sees Table 5,6.
III, the dark 5 wells test of gram
This well salt layer well section 5100-6446m uses comparatively ripe KCL-poly-sulphur saturated salt-water drilling fluid system, and drilling fluid density is carried to 2.26 g/cm
3-2.30 g/cm
3Bore saline bed, in drilling process, rheological parameter is difficult to keep, to lean on every day a large amount of glues to dilute to keep the drilling fluid rheology parameter, more seriously the High Temperature High Pressure dehydration is uncontrollable, use SMP-II, SMP-III dosage to reach 30% all inoperative (generally all at 50-70ml, or even full leak-off), so collapse seriously in the down-hole, often suppress when creeping into and stop the top and drive, because sticking to cut height (funnel viscosity more than 100 second, shear force 5-10/30-40) well-flushing bad, each blockage during tripping is very serious, difficult creep into to the well depth 6446m complete; When having used lubricated plugging agent CX-189, the drilling fluid high-temperature high pressure filter loss is down to 38ml by 70ml, and particularly mud cake quality and rheological parameter have obtained obvious improvement, and the down-hole blocked portion alleviates greatly, without the direct running casing well cementation of electrical measurement.
IV, the dark 1 well test of gram
Restrain dark 1 well, well depth 5900m increases the weight of to 2.30 g/cm
3Bore saline bed; After entering saline bed, although drilling speed is fast, every day drilling depth 80-90m, action and rheological parameter of mud is uncontrollable, causes " drilled in one day, two days allotment drilling fluid ", finally causes drilling fluid to be transported with tank car, the passive situation of drilling again; By progressively adding CX-189, CX-178, CX-179, the down-hole situation is taken a turn for the better, and the drilling fluid over-all properties obtains relatively good control.
V, the dark 7 wells test of gram
This well three is opened and is used 13 1/8 " non-standard drill, 3523.60m is drilled into 7090m from well depth, and thick approximately 3566.4m; gravel concentration accounts for 85%, composition be take irregular pyrogene sillar as main, accidental deposition sillar; the maximum 30mm of the gravel diameter that is broken in the landwaste, minimum 1mm is generally 5～10mm.By quartzose fine sand and coarse sand filling, large to bit wear between gravel, the bouncing of drilling tool of spraining is serious, cause slow when boring, bit life is short, frequent trips.
This well section bit size is large, uncased hole segment length (reaching 3566.4m), large (the about 770m of circulation of drilling fluid amount
3) about; And because the stratum is staggered complicated, contain the gravel stratum permeability better, borehole wall stability is relatively poor, causes easily that gravel collapses and empty thick mud cake undergauge causes and hangs tag, and therefore drilling fluid is suppressed shutoff and oilness is had relatively high expectations; This well 13 1/8 " non-standard drill bores dark, 10 6/8 " casing setting depth and circulation of drilling fluid dose-effect fruit are splendid.
This well begins progressively former sulfonated drilling fluid system to be converted into UDM-1 high temperature high density drilling fluid system from 5000m, and its drilling fluid high comprehensive performance is stable, has fully guaranteed downhole safety.Electrical measurement, running casing and well cementation be success once, and especially after the drillling tool twisting off accident occured well depth 6907m, the distortion of down-hole fish was comparatively serious,, salvages the drilling tool process and the phenomenon that hangs tag do not occur in the time about 5 days in the processing accident; This wellbore fluid of sufficient proof ties up under the long term high temperature aging condition of shaft bottom, still can satisfy the downhole safety requirement.Property of drilling fluid sees Table 7.
The checking of the dilution effect of products C X-179 of the present invention in the high density drilling fluid of gypsum, salt pollution:
Evaluation method is (ρ 2.0g/cm in the high density drilling fluid of gypsum, salt pollution
3), add respectively the thinners such as CX-179, sulfonation tannins (domestic, import), lignin (domestic, import) of same ratio behind 120 ℃ of high temperature ageings, survey yield values and Fig. 2, Fig. 3 are seen in gel strength contrast in 10 minutes down at 45 ℃; The result shows: several thinners are torn the widely different of web frame open under the condition of identical dosage, and the dilution capacity ordering of various thinners is: CX-179＞sulfonation tannins＞lignin.
The inventive method requires the basic condition of deep-well: 60-70 ° at upper formation inclination angle, contain 2575 meters of gravel stratum segment lengths, 7945 meters of compound salt deposit buried depths, brine layer pressure factor 2.42,180 ℃ of bottom temperatures, the highest liquid column hydrostatic pressure 198 MPa of mud, ultra-high voltage brine layer well section reservoir pressure window-25 MPa.
The explanation of experiment material of the present invention:
1, soil is provided by non-Xia Zi street wilkinite company limited in the Xinjiang as;
2, YX-1 calcium carbonate superfine powder, YX-2 calcium carbonate superfine powder are provided by the sincere prosperous material oil of Ba Zhou company limited;
3, the SP-80 tensio-active agent is provided by bar state ternary petroleum assistant company limited;
4, Zn
2(OH)
2CO
3Zinc subcarbonate is provided with beneficial industry and trade company limited by the Kuerle;
5, sulfonated-pheno-formoldehyde resin SMP-III is produced by bar state ternary petroleum assistant company limited;
6, zwitter-ion coating agent FA-367 is produced by the first chemical plant, Yanling County, Henan Province;
7, valchovite SPNH is produced by Yanqing County of Beijing humic acids factory;
8, low sticking Xylo-Mucine LV-CMC is produced by Sichuan Lu Bei Qiao Feng chemical industry company limited.
Claims (2)
1. the unconventional drilling fluid system of UDM-1 is used for the boring method of deep-well, it is characterized in that: raw material is prepared with parts by weight, it is numbered the combined drilling liquid system of CX-178, CX-179, CX-189, CX-191, CX-307, CX-144B, both improved the extreme disposal situation of mud liquid, optimized again the environment of stratigraphic structure, made drilling technique be able to sufficient embodiment;
(1) preparation process of drilling fluid additive:
CX-178 drilling fluid additive: formed by sulfonated-pheno-formoldehyde resin SMP-III 45-55 part, Chrome-free calcium lignin sulphonate 47-53 part;
CX-179 drilling fluid additive: formed by sulfonation tannin 85-93 part, Chrome-free thinner 8-12 part;
CX-189 drilling fluid additive: formed by sulfonated gilsonite FT-1 15-23 part, diesel oil 25-32 part, emulsifier op-10 4-6 part, valchovite SPNH 28-33 part, tap water 12-17 part;
CX-191 drilling fluid additive: formed by low sticking Xylo-Mucine LV-CMC 89-97 part, zwitter-ion coating agent FA-367 3-6 part;
CX-307 drilling fluid additive: by density 〉=4.30g/cm
3Ground barium sulfate 90-97 part, Potassium Bromide 3-6 part form;
CX-144B drilling fluid additive: formed by 300 sub-very much weight polyacrylamide 75-85 parts, 80A51 18-22 part;
With above-mentioned drilling fluid additive prepare respectively the packing stand-by; Its method: raw material is placed reactor, and stirring is 30-60 minute under normal temperature, normal pressure, mixes to get final product;
(2) for the disposal of mud liquid high temperature resistance, anti-high-density, anti-combined pollution
A prescription: [8% protects rubber cement (soil paste as 8%+3%CX-178+0.3%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH): 4:1)=and 1:2]+1%CX-191+CX-178+3%KOH+ CX-189+0.5%SP-80+0.5% zinc subcarbonate+7%KCl+15%NaCl+1%YX-1+1%YX-2+ CX-307;
B prescription: [4% protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191): CX-179 alkali lye (concentration: 30% to the 300ml glue; Alkali is than (CX-179:KOH): 4:1)=and X:Y]+1%CX-191+CX-178+4%CX-189+0.5%SP-80+7%KCl+CX-307;
C prescription: 300ml glue [4% protect rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%]: CX-179 alkali lye (concentration: 20%; Alkali is than (CX-179:KOH): 3:1)=and 1:3]+CX-191+CX-178+3%KOH+10%CX-189+0.3%SP-80+7%KCl+25%NaCl+1% YX-1+1%YX-2+2%CaSO
4+ 850gCX-307+ landwaste powder;
D prescription: the 300ml glue [protects rubber cement (soil paste as 8%+1.5%CX-178+0.15%CX-191+ water is diluted to 4%): CX-179 alkali lye (concentration: 20%; Alkali is than (CX-179:KOH): 3:1)=and 1:3]+1.5%CX-191+CX-178+3%KOH+8%CX-189+0.5%CaO+7%KCl+25%NaCl+2 %CaSO
4+ 850gCX-307+ landwaste powder;
Wherein the volume in a, b, c, the d prescription is pressed the glue volume calculation;
(3) for the disposal of stratigraphic structure
Prescription for Quaternary system: add soil paste 3-7%, NaOH 0.1-0.3%, CX-144B 0.3-0.8%, CX-127 0.2-0.5%, CX-189 1-2%, mix;
Prescription for Neogene System-Carboniferous system: add soil paste 2-3%, NaOH 0.2-0.5%, CX-144B 0.1-0.2%, CX-178 3-7%, CX-189 3-7%, KCl5-7%, NaCl5-20%, mix;
Prescription for the Devonian system: soil paste 2-3%, NaOH 0.3-0.5%, CX-178 3-5%, CX-189 3-5%, oil layer protective agent 2-4% mix;
(4) injection mode of drilling fluid additive: soil paste is beaten with pump and was annotated in the mud tank aquation 2-3 days as will newly joining, add auxiliary agent by the mud tank extraction through slush pump again and stir, inject into well, in well, return out, flow back to the mud tank circulation through vibratory screening apparatus, until finishing drilling; Wherein the 2-3 hour adding time spent of auxiliary agent, polymkeric substance added time spent 4-5 hour; The continuously stirring speed of mud tank is that 200-300 turns/r, and the mud tank temperature is at 40-50 ℃.
2. method according to claim 1 is characterized in that: the basic condition of deep-well: 60-70 ° at upper formation inclination angle, contain 2575 meters of gravel stratum segment lengths, 7945 meters of compound salt deposit buried depths, brine layer pressure factor 2.42,180 ℃ of bottom temperatures, the highest liquid column hydrostatic pressure 198 MPa of mud, ultra-high voltage brine layer well section reservoir pressure window-25 MPa.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103215017A (en) * | 2013-04-11 | 2013-07-24 | 中国石油大学(华东) | Electronpositive borehole wall stabilizer applied to oil and gas drilling and preparation method of electronpositive borehole wall stabilizer |
| CN105670584A (en) * | 2016-03-01 | 2016-06-15 | 中国石油天然气股份有限公司 | Temporary plugging type well control fluid suitable for repairing low-permeability low-pressure gas well and preparation method |
| CN110760294A (en) * | 2019-11-18 | 2020-02-07 | 廊坊庆兴化工有限公司 | Anti-collapse filtrate reducer silicon-fluorine resin compound for drilling fluid |
| CN110905410A (en) * | 2019-11-29 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
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- 2011-09-26 CN CN 201110287605 patent/CN103013471A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215017A (en) * | 2013-04-11 | 2013-07-24 | 中国石油大学(华东) | Electronpositive borehole wall stabilizer applied to oil and gas drilling and preparation method of electronpositive borehole wall stabilizer |
| CN105670584A (en) * | 2016-03-01 | 2016-06-15 | 中国石油天然气股份有限公司 | Temporary plugging type well control fluid suitable for repairing low-permeability low-pressure gas well and preparation method |
| CN105670584B (en) * | 2016-03-01 | 2018-11-16 | 中国石油天然气股份有限公司 | A kind of temporary stifled type kill-job fluid being suitable for hypotonic low-pressure gas well well workover and preparation method |
| CN110760294A (en) * | 2019-11-18 | 2020-02-07 | 廊坊庆兴化工有限公司 | Anti-collapse filtrate reducer silicon-fluorine resin compound for drilling fluid |
| CN110905410A (en) * | 2019-11-29 | 2020-03-24 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
| CN110905410B (en) * | 2019-11-29 | 2021-01-29 | 中国石油天然气集团有限公司 | Safe crossing method for Sulige sidetracking slim hole box 7 tan mudstone section |
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