CN100343358C - Deep well low-density cement slurry - Google Patents
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- CN100343358C CN100343358C CNB2005101259940A CN200510125994A CN100343358C CN 100343358 C CN100343358 C CN 100343358C CN B2005101259940 A CNB2005101259940 A CN B2005101259940A CN 200510125994 A CN200510125994 A CN 200510125994A CN 100343358 C CN100343358 C CN 100343358C
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- 239000004568 cement Substances 0.000 title claims abstract description 49
- 239000002002 slurry Substances 0.000 title claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- IRLPACMLTUPBCL-KQYNXXCUSA-N 5'-adenylyl sulfate Chemical compound C1=NC=2C(N)=NC=NC=2N1[C@@H]1O[C@H](COP(O)(=O)OS(O)(=O)=O)[C@@H](O)[C@H]1O IRLPACMLTUPBCL-KQYNXXCUSA-N 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 9
- 235000013312 flour Nutrition 0.000 claims description 8
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 6
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 claims description 5
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 4
- 239000006004 Quartz sand Substances 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 208000034699 Vitreous floaters Diseases 0.000 abstract 2
- 239000003638 chemical reducing agent Substances 0.000 abstract 2
- UDJZTGMLYITLIQ-UHFFFAOYSA-N 1-ethenylpyrrolidine Chemical compound C=CN1CCCC1 UDJZTGMLYITLIQ-UHFFFAOYSA-N 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000009825 accumulation Methods 0.000 abstract 1
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 abstract 1
- 238000002156 mixing Methods 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 239000011863 silicon-based powder Substances 0.000 abstract 1
- DIKJULDDNQFCJG-UHFFFAOYSA-M sodium;prop-2-ene-1-sulfonate Chemical compound [Na+].[O-]S(=O)(=O)CC=C DIKJULDDNQFCJG-UHFFFAOYSA-M 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000011083 cement mortar Substances 0.000 description 15
- 239000011440 grout Substances 0.000 description 14
- 239000011575 calcium Substances 0.000 description 11
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 230000018044 dehydration Effects 0.000 description 8
- 238000006297 dehydration reaction Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000378 calcium silicate Substances 0.000 description 3
- 229910052918 calcium silicate Inorganic materials 0.000 description 3
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- -1 N-vinyl pyrrole ketone Chemical class 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The present invention relates to deep well low-density cement slurry, which solves the problems that the existing cement slurry has poor compressive strength and sedimentation stability. The present invention is characterized in that the present invention comprises the following components according to the proportion by weight: 100 portions of cement, 87 to 126 portions of water, 5 to 10 portions of filler, 45 to 70 portions of palliative agents, 5 to 25 portions of quartz sand, 8 to 10 portions of filtration-reducing agents, wherein the filler is silicon powder (the content of SiO2 is larger than 95%); the palliative agents are floater floaters; the filtration-reducing agents can be formed by the polymerization of sodium allyl sulphonate, N-vinyl pyrrolidine and AMPS at 85 DEG C, and SO2 can be used as oxidant under the condition that pH is 8. The low-density cement slurry utilizes a tight accumulation theory and a grain composition principle, and the sedimentation stability of the low-density cement slurry and the compressive strength of alite can be enhanced by the physical chemistry action of external blending material of the low-density cement slurry. The present invention has the characteristics of low water loss and low permeability.
Description
Technical field:
The present invention relates to the used a kind of grout in oil drilling cementing technology field, belong to a kind of deep well low-density cement slurry.
Background technology:
Along with deepening continuously of the peripheral exploration of grand celebration, the hydrocarbon zone that all distributing from shallow stratum to deep stratum, hydrocarbon zone distributes wide, and drilling well finishes back well cementation sealing segment length, and promptly long shut-in well is more and more.Long sealing well has two kinds of methods, and a kind of method is to annotate instrument with twin-stage, but is difficult to find the suitable position of transferring, and causes the unnecessary house layer and the waste of resource, prolongs the well cementation duration, the construction technology complexity; Another kind method is to adopt the low-density cement mortar well cementation, and this method can effectively reduce liquid column hydrostatic pressure, prevents formation leakage, therefore, needs the lower grout of density to satisfy oil-gas mining and with the needs of well construction.The present existing low-density cement mortar patent No. is 200310102215, and the cement slurry density that this patent is invented is 1.35～1.50g/cm
3Though alleviated long shut-in well well cementation demand, but can not satisfy the low long shut-in well well cementation of parting pressure fully, the existing general method of cement slurry density that reduces is for increasing the dosage of water cement ratio or increase light-weight additive, this kind method will influence the ultimate compression strength of cement stone and the sedimentation stability of grout, make it not satisfy the requirement of cementing operation.
Summary of the invention:
In order to overcome the deficiency of existing low-density cement mortar ultimate compression strength and sedimentation stability difference, the invention provides a kind of deep well low-density cement slurry, this low-density cement mortar utilizes theory of high packing and grain composition principle, utilize the physics chemical action of low-density cement mortar extra material, improve the ultimate compression strength of the sedimentation stability and the cement stone of low-density cement mortar, had the low and low characteristics of rate of permeation of fluid loss.
The present invention is achieved in that this low-density cement mortar, its component and proportioning are as follows by weight: 100 parts of cement, 87～126 parts in water, 5～10 parts of weighting agents, 45～70 parts of light-weight additives, 8～10 parts of 5～25 parts of quartz sands and water retainings, wherein weighting agent is SiO
2The silica flour of content＞95%, light-weight additive is for floating pearl, and water retaining is at 85 ℃, SO by sodium allylsulfonate, N one vinyl pyrrolidone and AMPS
2As being polymerized under oxygenant and the PH=8 condition.
Above-mentioned weighting agent is the thin spheroidal particle of a kind of spy, and mean diameter is 0.15 micron.
The invention has the beneficial effects as follows: owing to take such scheme, weighting agent is the thin spheroidal particle of a kind of spy, and mean diameter is 0.15 micron, SiO
2Content＞95% is commonly called as silica flour, the hydrated product Ca (OH) of silica flour and cement
2React, generate the moisture calcium silicate hydrate of low basicity, generation does not contain or contains less Ca (OH)
2The water mudrock structure of difficult infiltration, owing to adsorb large quantity of moisture around the filling agent particle in addition, interconnect by hydrogen is strong between the water molecules, make the spatial grid structure that forms even compact between the subparticle, grout forms stable suspension system, and the particle rational gradation composition and the polarization of different-grain diameter make the ultimate compression strength and the impervious ability of cement stone; The adding of quartz sand, main combination alleviates thing and regulates the interior active silico-calcium ratio of grout jointly, water retaining is to be polymerized under 85 ℃, PH=8 and oxygenant condition by sodium allylsulfonate, N-vinyl pyrrolidone and AMPS, contain in the resultant strong aquation adsorbing-CH-SO
3 -,-COOH base, and-CONH2 is mainly by a large amount of water of adsorption by hydrogen bond, therefore form thicker adsorption film at cement particle surface, water can be wrapped up, macromole interphase interaction simultaneously forms reticulated structure and prevents that cement granules is coalescent, the trap free water, and form fine and close mud cake, show and well fall dehydration effect, and the hydration layer of the aquation group on the cement granules is out of shape under the effect of pressure reduction, stop up the duct between the mud cake particle, reduced the rate of permeation of pat of cement, thereby reduce dehydration.
Embodiment:
The present invention is further illustrated below in conjunction with embodiment: this low-density cement mortar, its component and proportioning are as follows by weight: 100 parts of cement, 87～126 parts in water, 5～10 parts of weighting agents, 45～70 parts of light-weight additives, 8～10 parts of 5～25 parts of quartz sands and water retainings, wherein weighting agent is SiO
2The silica flour of content＞95%, light-weight additive is for floating pearl, and water retaining is at 85 ℃, SO by sodium allylsulfonate, N-vinyl pyrrolidone and AMPS
2As being polymerized under oxygenant and the PH=8 condition.
The selected weighting agent of the present invention is the thin spheroidal particle of a kind of spy, and mean diameter is 0.15 micron, contains abundant SiO
2, its content is commonly called as silica flour greater than 95%, the hydrated product Ca (OH) of silica flour and cement
2React, the moisture calcium silicate hydrate of the low basicity of generation is C/H=0.67～1.1 wherein, and C/H is the quality ratio of calcium oxide and crystal water, produces not contain or contain less Ca (OH)
2The water mudrock structure of difficult infiltration, reaction equation is: Ca (OH)
2+ SiO
2→ 3CaO2SiO
23H
2O3CaO2SiO
23H
2O is a kind of gel.
Under the hot environment, mortar architecture mixes after the suitable silica flour, SiO
2The Ca that separates out in the time of can absorbing the cement clinker aquation (OH)
2Generate 3CaO2SiO
23H
2O has reduced the Ca in the aquation system
2+Concentration has been broken 2CaOSiO
22H
2O, CaOSiO
2H
2The aquation balance of high calcium hydrated silicates such as O, they continue aquation and change low-calcium silicate gradually into, make 3CaO2SiO
23H
2O becomes the main hydration products of cement stone, and fibrous 3CaO2SiO
23H
2The monomeric ultimate compression strength of O is very anxious fixed under hot environment, has therefore improved silicate oil well cement ultimate compression strength and thermostability at high temperature.Can also adsorb large quantity of moisture around the filling agent particle in addition, interconnect by hydrogen bond between the water molecules, make the spatial grid structure that forms even compact between the subparticle, grout forms stable suspension system, and the particle rational gradation composition and the polarization of different-grain diameter, make cement stone fine and close more, and the formation of additional facet further improves the sedimentation stability of grout, and improved the ultimate compression strength and the impermeabilisation ability of cement stone.
The selected light-weight additive of the present invention is the thin-walled hollow beads that sorts out from flyash for floating pearl (thin-walled hollow microballon), floating pearl.Because of its light weight easily floats, often float on the surface of flyash, so name is floated pearl towards buck.Floating pearl, to apply to its effect of cement as light-weight additive very obvious, can reduce the density of grout; The adding of quartz sand mainly is to regulate active silico-calcium ratio in the grout jointly in conjunction with alleviating thing, when the ratio of active silico-calcium near 1 the time, cement strength high temperature resistance decline effect is best.
The selected water retaining of the present invention be by sodium allylsulfonate, N-vinyl pyrrole ketone and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) at 85 ℃, SO
2Be polymerized under the condition as oxygenant and PH=8, this polymkeric substance contains a large amount of-CONH
2,-CH
2-SO
3 -,-COOH group, and-CH
2-SO
3 -Mainly be by a large amount of water of the strong absorption of hydrogen, therefore form thicker adsorption film at cement particle surface, water can have been wrapped up rice, macromole interphase interaction simultaneously forms reticulated structure, prevents that cement granules is coalescent, the trap free water, and form fine and close mud cake, show and well fall dehydration effect, and the hydration layer of the aquation group on the cement granules is in the duct between the distortion obstruction mud cake particle under the effect of pressure reduction, reduce the rate of permeation of pat of cement, thereby reduced dehydration.
Working out density according to the grain composition principle is 1.20～1.45g/cm
3Low-density cement mortar, the existing 1.60g/cm of its permeability ratio
3Low-density cement mortar compare and reduced by 70%, used instrument is the cement permeability detector, and hot strength has improved 4～5Mpa, reaches more than the 14Mpa, used instrument is 7375 type high temperature and pressure protective cauldrons and 4027 type intensity pressing machinees, and following table is different grout rate of permeation experimental data tables:
Table 1
| The grout type | L cm | ΔP MPa | Q Survey ml/min | K ×10 3μm 2 |
| 1.60g/cm 3Common low-density cement mortar | 8.492 | 4.07 | 143 | 0.10373 |
| 1.60g/cm 3Common low-density cement mortar+water retaining | 8.416 | 3.73 | 21 | 0.01785 |
| 1.45g/cm 3Deep well low-density cement slurry | 7.370 | 3.05 | 6 | 0.00577 |
| 1.40g/cm 3Deep well low-density cement slurry | 6.276 | 2.06 | 3 | 0.00533 |
| 1.35g/cm 3Deep well low-density cement slurry | 4.776 | 2.23 | 16 | 0.01850 |
| 1.30g/cm 3Deep well low-density cement slurry | 3.374 | 2.07 | 18 | 0.01702 |
| 1.25g/cm 3Deep well low-density cement slurry | 6.570 | 2.08 | 14 | 0.02570 |
| 1.20g/cm 3Deep well low-density cement slurry | 6.348 | 2.09 | 17 | 0.02978 |
Annotate: rate of permeation is to calculate according to Darcy's law.
The temperature range that this water retaining is suitable for is 90～120 ℃, and the API dehydration is controlled in the 100ml, and is applicable to that A level and G class g cement, following table are to fall the dehydration experimental data under the differing temps different densities:
Table 2
| Temperature-density g/cm 3 | 93 ℃ of fluid losses (ml) | 103 ℃ of fluid losses (ml) | 111 ℃ of fluid losses (ml) | 121 ℃ of fluid losses (ml) |
| 1.20 | 98 | 72 | 68 | 86 |
| 1.25 | 90 | 78 | 84 | 50 |
| 1.30 | 66 | 52 | 62 | 80 |
| 1.35 | 68 | 82 | 58 | 44 |
| 1.40 | 95 | 78 | 64 | 70 |
| 1.45 | 54 | 58 | 60 | 72 |
This water retaining makes the grout stability good in conjunction with the liquid stabilisers acting in conjunction, has solved the strong dispersive problem of high temperature dehydration agent, makes cement slurry property stable.
Embodiment: on the basis of this project through shop experiment and ground simulation experiment, the loose southern regional SN-180 test in place in northeast petroleum office of petrochemical industry nova company.This well location is in Shuan Long township, Changling County, Jilin Province, tectonic structure is positioned at the two Long Xi structures of Chang Ling depression, and geology is stored mainly based on Sweet natural gas, and this area's reservoir pressure is low, easily cause the grout leakage, particularly Yao Jia group, green hill mouth group leakiness are stepped on Lou Ku and flint mountain range group leakiness easily sprays, and easily bring out annular channeling, even generation blowout, bring direct influence for this area's oil-gas exploration and development, therefore, this area generally adopts the low-density cement mortar well cementation.Well depth is 2760 meters during the SN-180 finishing drilling, 2160 meters of sealing height, long sealing well.Repeatedly leakage takes place in wellbore construction, and severe leakage takes place in 725.91 meters of well depths (Yao Jia group), and having does not into have, and misses 72m altogether
3, to get into 2593.49～2700m (stepping on the Lou bottom of the reservior) and recur leakage to the flint mountain range, the leak stopping while drilling until finishing drilling, is missed mud amount 440m altogether
3, therefore, cementing difficulty is the leakproof problem, except taking leak-proof construction from well shaft fixing technology, the design cement slurry density is 1.40g/cm
3, its low-density cement mortar shop experiment data:
Table 3
| Pound sign | Density g/cm | Degree of mobilization cm | Free liquid ml | Denseness Bc | Thickening time min | API dehydration ml | Ultimate compression strength MPa |
| SN-180 | 1.40 | 22.7 | 0 | 7 | 165 | 58 | 16.8 |
Annotate: (1) SN-180 well circulating temperature is got 82 ℃.
(2) compressive strength test condition is 90 ℃ * normal pressure * 48 hour.
At first inject 10m
3Spacer pad has two Halliburton's cars to annotate low-density cement mortar 66.8m again
3, average instantaneous displacement is 1.8m
3/ min, annotating pressure is 10～5～9MPa, average cement slurry density is 1.40g/cm
3, grout is mixed normally, no bubble and demixing phenomenon.Replace mud 27.3m
3, finish surplus 2m by the big pump of drilling team
3Being asked by high-power car and to bump, is 4.5～9MPa for pressing, and instantaneous displacement is 2m
3, bruising is 10MPa, casing pressure test 15MPa, and 5min does not fall, and spacious the pressure waited with fixed attention, and whole cementing operation is normal, no leakage phenomena.Acoustic variable density log is qualified well behind the 48h.
Claims (2)
1, a kind of deep well low-density cement slurry, it is characterized in that: its component and proportioning are as follows by weight: 100 parts of cement, 87～126 parts in water, 5～10 parts of weighting agents, 45～70 parts of light-weight additives, 8～10 parts of 5～25 parts of quartz sands and water retainings, wherein weighting agent is SiO
2The silica flour of content＞95%, light-weight additive is for floating pearl, and water retaining is at 85 ℃, SO by sodium allylsulfonate, N-vinyl pyrrolidone and AMPS
2As being polymerized under oxygenant and the PH=8 condition.
2, deep well low-density cement slurry according to claim 1 is characterized in that: weighting agent is the thin spheroidal particle of a kind of spy, and mean diameter is 0.15 micron.
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| CNB2005101259940A CN100343358C (en) | 2005-12-02 | 2005-12-02 | Deep well low-density cement slurry |
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| CN102533234B (en) * | 2011-11-30 | 2014-01-01 | 中国神华能源股份有限公司 | Cement composition and application thereof |
| CN102434142B (en) * | 2011-11-30 | 2014-12-03 | 中国神华能源股份有限公司 | Coal underground gasification method |
| CN103740339A (en) * | 2013-12-31 | 2014-04-23 | 东营泰尔石油技术有限公司 | Plugging filler |
| CN106008804B (en) * | 2016-06-04 | 2017-09-01 | 王金明 | A kind of method that post-crosslinking method prepares oil-well cement filtrate reducer |
| CN106084126A (en) * | 2016-06-04 | 2016-11-09 | 王金明 | A kind of preparation method of anionic oil-well cement filtrate reducer |
| CN107964398B (en) * | 2016-10-20 | 2020-06-09 | 中国石油化工股份有限公司 | Low liquid-solid ratio oil well cement slurry and preparation method thereof |
| CN106554765A (en) * | 2016-10-25 | 2017-04-05 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | A kind of oil-well cement is without chlorine anti-channeling early strength agent and preparation method and application |
| CN106630806B (en) * | 2017-01-06 | 2019-04-26 | 中国海洋石油集团有限公司 | A kind of cement mixing component and its application |
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| CN1096501A (en) * | 1993-06-18 | 1994-12-21 | 郭成正 | Superlight concrete |
| CN1407051A (en) * | 2001-08-29 | 2003-04-02 | 中国石油化工股份有限公司 | Water retaining composition for cement for oil well |
| CN1539786A (en) * | 2003-10-27 | 2004-10-27 | 大庆石油管理局 | Low-density cement slurry |
| US20050204962A1 (en) * | 2002-12-10 | 2005-09-22 | Karen Luke | Zeolite-containing cement composition |
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2005
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| CN86106011A (en) * | 1986-09-08 | 1988-03-23 | 九江水泥船试验厂 | Ultralight, high-strength specificity cement " mortar " |
| US4674574A (en) * | 1986-09-26 | 1987-06-23 | Diamond Shamrock Chemicals Company | Fluid loss agents for oil well cementing composition |
| US5284513A (en) * | 1992-10-22 | 1994-02-08 | Shell Oil Co | Cement slurry and cement compositions |
| CN1096277A (en) * | 1993-06-11 | 1994-12-14 | 郭成正 | Ultra-light special cement |
| CN1096501A (en) * | 1993-06-18 | 1994-12-21 | 郭成正 | Superlight concrete |
| CN1407051A (en) * | 2001-08-29 | 2003-04-02 | 中国石油化工股份有限公司 | Water retaining composition for cement for oil well |
| US20050204962A1 (en) * | 2002-12-10 | 2005-09-22 | Karen Luke | Zeolite-containing cement composition |
| CN1539786A (en) * | 2003-10-27 | 2004-10-27 | 大庆石油管理局 | Low-density cement slurry |
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| CN1803967A (en) | 2006-07-19 |
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