CN108102621A - A kind of oil-well cement high pressure-bearing low-density palliative and its preparation, application process - Google Patents
A kind of oil-well cement high pressure-bearing low-density palliative and its preparation, application process Download PDFInfo
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- CN108102621A CN108102621A CN201711160065.2A CN201711160065A CN108102621A CN 108102621 A CN108102621 A CN 108102621A CN 201711160065 A CN201711160065 A CN 201711160065A CN 108102621 A CN108102621 A CN 108102621A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to one kind to be used for oil-well cement high pressure-bearing low-density palliative and the methods for making and using same of the palliative.The oil-well cement is included with high pressure-bearing low-density palliative：The fine sepiolite powder of 10 ~ 45 parts by weight, the pounce of 10 ~ 35 parts by weight, the swelling perlite powder of 1 ~ 10 parts by weight, micro- silicon of 5 ~ 20 parts by weight.It is counted when using cement weight as 100 parts, when 20 40 parts of oil-well cements are added to high pressure-bearing low-density palliative in well cementing mortar architecture, oil-well cement density can effectively be reduced, it is unstable to solve conventional floating bead, foamed low density oil well cement paste slurry performance, under high temperature and pressure the problems such as cement density rise, thickening time shortening.
Description
Technical field
The present invention relates to one kind in oil drilling auxiliary chemicals field cement can be simultaneously reduced for oil well cementing cement
The high pressure-bearing palliative of density and the preparation method and application of the palliative.
Background technology
The many oil reservoirs in original oil zone have been enter into ultra-high water cut stage at present, and reservoir system is complicated, oil reservoir is more, well section is long, heterogeneous
By force, oil water relation is complicated, and oil well is often due to the perforation of the reasons such as corrosion or leakage so that and set damage, casing deformation well quantity are continuously increased,
Huge economic loss is brought to oil field.
In petroleum drilling engineering, the surface casing cementing of low pressure and leakmess formation and water flooding seriously corroded is close to cementing slurry
The requirement of degree is very high, it is often necessary to use low-density cement paste well cementation.It is currently used well cementation light weight cement have floating bead cement and
Foamed cement, but floating bead is easily rupturable under high pressure, intakes, and foamed cement is not only easily rupturable it also occur that volume contraction, these phenomenons
The problems such as cement slurry density rise, thickening time will be caused to shorten.Therefore when well depth is more than 2500m, due to shaft bottom high temperature
High pressure causes floating bead, lather collapse, and Regular low density cement mortar is present with underground density and is above the ground level the situation of density.If well
Bottom cement slurry density is more than 1.60g/cm3, cementing balance pressure and pressure leakage stratum can be broken when excessive to strata pressure, given
Cementing operation brings certain risk；It is present with cement simultaneously and returns high insufficient situation, makes surface pipe exposed in high salinity
In the water environment of stratum, the corrosion of casing is caused, seriously affects the oil-water well service life.
The content of the invention
In order to solve the problems in the prior art, the purpose of the present invention is to provide a kind of oil-well cement and subtracted with high pressure-bearing low-density
Light diaphoretic prescription and preparation, application process effectively to reduce oil-well cement density, solve Regular low density oil well cement paste slurry performance not
Stablize, under high temperature and pressure the problems such as cement density rise, thickening time shortening.
Technical scheme includes：
A kind of high pressure-bearing low-density palliative of oil-well cement includes the component of following parts by weight：
Sepiolite powder 10-45,
Pounce 10~35,
Swelling perlite powder 1~10,
Micro- silicon 5-20.
Further, the high pressure-bearing low-density palliative of the oil-well cement includes the component of following parts by weight：
Sepiolite powder 25-40,
Pounce 20~30,
Swelling perlite powder 2~8,
Micro- silicon 10-15.
The sepiolite powder is a kind of porous silicic acid magnesium mineral.
The pounce processes made powder for the drying inner casing of inkfish, and main component is lightweight CaCO3。
The swelling perlite powder be volcanic ash powder, main component SiO2、Al2O3。
Technical scheme further includes above-mentioned oil-well cement：It will
Sepiolite powder, pounce, swelling perlite powder and micro- silicon, which are put into according to the content in mixer, puddle uniformly.
It is with the application process of high pressure-bearing low-density palliative according to foregoing oil-well cement：Based on 100 parts by weight of cement, with
The oil-well cement of 20-40 parts by weight high pressure-bearing low-density palliative, the drag reducer of 0.1-0.8 parts by weight, 1.0-1.8 parts by weight
Fluid loss agent, 0.05-0.15 parts by weight retarder mixing after, water is added to be configured to liquid-solid ratio as 0.5-0.8 cementing slurries.
Oil-well cement is further optimized with the application process of high pressure-bearing low-density palliative：Based on 100 parts by weight of cement, with
The drop dehydration of the oil-well cement of 30-35 parts by weight high pressure-bearing low-density palliative, the drag reducer of 0.4 parts by weight, 1.5 parts by weight
After agent, the retarder mixing of 0.1 parts by weight, water is added to be configured to liquid-solid ratio as 0.6 cementing slurry.
The drag reducer be SWJZ-1 type drag reducers, the fluid loss agent be SWJ-4 type drag reducers, the slow setting
Agent is SWH-1 type retarder.
The high pressure-bearing low-density palliative of oil-well cement of the present invention, add in well cementing mortar architecture after can be effective
It reduces cement slurry density, rheological property etc. and meets cementing operation design standard, meet shallow well and the requirement of deep well cementing construction work.
And the cement mortar slurry sedimentation stability with its configuration is good, and performance is stablized at high temperature under high pressure, with can solving low pressure and easy leaking
The leakage of layer cementing slurry or water flooding are conducive to protection sleeve pipe, improve cementing quality, prolong to the etching problem of surface pipe
Long oil well service life, widely used application value.
Specific embodiment
With reference to specific embodiment, the present invention will be further described.
Raw material explanation：The materials such as experiment used hollow float bead, sepiolite powder, pounce, micro- silicon by it is commercially available and
；The materials such as drag reducer (SWJZ-1), fluid loss agent (SWJ-4), retarder (SWH-1), which are purchased from Shandong Wald oilfield technology, to be had
Limit company, G class g cements are purchased from Linchu, shantung Sheng Wei special cements Co., Ltd.Wherein sepiolite powder refers to natural porous silicic acid
Magnesium mineral raw material as main component, it is light, cement slurry density is advantageously reduced, while there is certain rush to coagulate early pretend
With being conducive to early stage Behavior of Hardened Cement Paste strength development.Pounce quality is light, main component CaCO3, it is good with cement compatibility, have
Beneficial to reduction slurry density.Swelling perlite powder is the processed products obtained therefrom of material from acidic volcanic glass matter lava, can promote ettringite
Generation, reduce Behavior of Hardened Cement Paste shrink, improve cement strength.
In order to illustrate problem, generally the cementing concrete sample for adding in the high pressure-bearing low-density palliative of the oil-well cement
Regular low density cementing concrete sample under the same conditions is compared.
First, the preparation method embodiment of high pressure-bearing low-density oil well cement lightening agent
Embodiment 1：
40 parts by weight sepiolite powders are taken, add in 20 parts by weight of pounce, 3 parts by weight of swelling perlite powder, micro- 7 weight of silicon
Part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well water
Mud palliative.
Embodiment 2：
23 parts by weight sepiolite powders are taken, add in 12 parts by weight of pounce, 4 parts by weight of swelling perlite powder, micro- 8 weight of silicon
Part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well water
Mud palliative.
Embodiment 3：
30 parts by weight sepiolite powders are taken, add in 25 parts by weight of pounce, 4 parts by weight of swelling perlite powder, micro- 10 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 4：
30 parts by weight sepiolite powders are taken, add in 30 parts by weight of pounce, 6 parts by weight of swelling perlite powder, micro- 12 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 5：
35 parts by weight sepiolite powders are taken, add in 20 parts by weight of pounce, 2 parts by weight of swelling perlite powder, micro- 10 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 6：
35 parts by weight sepiolite powders are taken, add in 23 parts by weight of pounce, 5 parts by weight of swelling perlite powder, micro- 11 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 7：
35 parts by weight sepiolite powders are taken, add in 28 parts by weight of pounce, 8 parts by weight of swelling perlite powder, micro- 15 weight of silicon
Measure part, put into double worm mixer, puddled, puddle repeatedly 2 it is small when, high pressure-bearing low-density oil is obtained after uniformly
Well cement palliative.
Embodiment 8：
40 parts by weight sepiolite powders are taken, add in 22 parts by weight of pounce, 6 parts by weight of swelling perlite powder, micro- 12 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 9：
40 parts by weight sepiolite powders are taken, add in 28 parts by weight of pounce, 10 parts by weight of swelling perlite powder, micro- 15 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
Embodiment 10：
40 parts by weight sepiolite powders are taken, add in 25 parts by weight of pounce, 8 parts by weight of swelling perlite powder, micro- 14 weight of silicon
Measure part, put into double worm mixer in, puddled, puddle repeatedly 2 it is small when, after uniformly after i.e. obtain high pressure-bearing low-density oil well
Cement palliative.
2nd, high pressure-bearing low-density oil well cement lightening agent application examples
Embodiment 11：
No. 1 system of cementing slurry：100 parts by weight of G class g cements, high pressure-bearing low-density oil well cement lightening agent 15.4
Part, 0.4 parts by weight of drag reducer (SWJZ-1), 1.5 parts by weight of fluid loss agent (SWJ-4), 0.1 weight of retarder (SWH-1)
Number, liquid-solid ratio 0.6.No. 1 system is subjected to sedimentation stability test and intensity test before and after high temperature, involved cement
Pulp density is expressed as ρ1, cement briquette be expressed as sample 1.
Embodiment 12：
No. 2 systems of cementing slurry：100 parts by weight of G class g cements, high pressure-bearing low-density oil well cement lightening agent 13.6
Part, 0.4 parts by weight of drag reducer (SWJZ-1), 1.5 parts by weight of fluid loss agent (SWJ-4), 0.1 weight of retarder (SWH-1)
Number, liquid-solid ratio 0.55.No. 2 systems are subjected to sedimentation stability test and intensity test before and after high temperature, involved water
Mud density is expressed as ρ2, cement briquette be expressed as sample 2.
Comparative example：
No. 0 system (comparing system) of cementing slurry：100 parts by weight of G class g cements, 25 parts by weight of hollow float bead, subtract
0.4 parts by weight of resist (SWJZ-1), 1.5 parts by weight of fluid loss agent (SWJ-4), 0.1 parts by weight of retarder (SWH-1),
Liquid-solid ratio is 0.55.No. 0 system is subjected to sedimentation stability test and intensity test before and after high temperature, involved cement mortar is close
Degree is expressed as ρ0, cement briquette be expressed as sample 0.
3rd, cement slurry property is evaluated
Cement slurry property evaluation of the present invention comprises the steps of：
(1) cement mortar is made according to API standard 10, is stood at 70 DEG C for 24 hours, measure upper, middle and lower slurry density, evaluation
The sedimentation stability of cement mortar；
(2) cement mortar is made according to API standard 10, normal pressure is thickened 20min at 70 DEG C, pours into compression strength under stirring and supports
Protect mould；
(3) after conserving 48h under the conditions of 70 DEG C × 0.1MPa, the Behavior of Hardened Cement Paste compression strength after test solidification.
(4) under the conditions of 120 DEG C × 40MPa, supercharging thickening experiment is carried out.
With reference to table 1 to the sedimentation stability of the cement mortar of the addition high pressure-bearing low-density oil well cement lightening agent of cement mortar
It illustrates.
Table 1 is the sedimentation stability test result of No. 1, No. 2 and No. 0 mortar architecture, from table 1 it follows that standing
After for 24 hours, the slurry density of No. 1 and No. 2 mortar architecture does not occur any difference, and stability is good；And No. 0 mortar architecture
Because slurry settles, upper, middle and lower density is substantially changed, and is unfavorable for site safety construction.
Table 2 for No. 1, No. 2 and No. 0 mortar architecture supercharging thickening test result and preparation Behavior of Hardened Cement Paste coupon sample 1,2,
0 intensity test result.The 0 Behavior of Hardened Cement Paste power of sample 1,2 Behavior of Hardened Cement Paste of sample and sample it can be seen from experimental result in table 2
It is suitable to learn performance, but under the conditions of 120 DEG C × 40MPa, No. 0 mortar architecture slurry 50min is just thickened, and is illustrated conventional
Floating bead ruptures floating bead low-density cement mortar system at high temperature under high pressure, affects the thickening performance of slurry；No. 1, No. 2 cement
The slurry system slurry thickening time has reached more than 2h, illustrates to add in high pressure-bearing low-density oil well cement lightening agent of the present invention
Low-density cement mortar at high temperature under high pressure stablize by slurry performance, and thickening time shortening phenomenon does not occur, not only meets shallow well and applies
Work also meets the needs of cementing operations of deep-well.
1 low-density cement mortar of table stands density comparison
2 light weight cement compression strength of table and thickening time contrast and experiment
Claims (9)
1. the high pressure-bearing low-density palliative of a kind of oil-well cement, it is characterised in that include the component of following parts by weight：
Sepiolite powder 10-45,
Pounce 10 ~ 35,
Swelling perlite powder 1 ~ 10,
Micro- silicon 5-20.
2. the high pressure-bearing low-density palliative of oil-well cement described in accordance with the claim 1, it is characterised in that include following weight
The component of part：
Sepiolite powder 25-40,
Pounce 20 ~ 30,
Swelling perlite powder 2 ~ 8,
Micro- silicon 10-15.
3. the high pressure-bearing low-density palliative of oil-well cement according to claim 1 or 2, it is characterised in that the Hai Pao
Mountain flour is a kind of porous silicic acid magnesium mineral.
4. the high pressure-bearing low-density palliative of oil-well cement according to claim 1 or 2, it is characterised in that the inkfish
Bone meal processes made powder for the drying inner casing of inkfish, and main component is lightweight CaCO3。
5. the high pressure-bearing low-density palliative of oil-well cement according to claim 1 or 2, it is characterised in that the expansion
Crushed crude pearlite be volcanic ash powder, main component SiO2、Al2O3。
6. the oil-well cement according to claim 1 or 2 preparation method of high pressure-bearing low-density palliative, feature exist
In：Sepiolite powder, pounce, swelling perlite powder, micro- silicon are put into according to the content in mixer and puddle uniformly.
7. according to the application process of high pressure-bearing low-density palliative of the oil-well cement described in claim 6, it is characterised in that：It presses
100 parts by weight meter of cement is subtracted with the oil-well cements of 20-40 parts by weight with high pressure-bearing low-density palliative, 0.1-0.8 parts by weight
Resist, the fluid loss agent of 1.0-1.8 parts by weight, 0.05-0.15 parts by weight retarder mixing after, water is added to be configured to liquid-solid ratio be
0.5-0.8 cementing slurries.
8. according to the application process of high pressure-bearing low-density palliative of the oil-well cement described in claim 7, it is characterised in that：It presses
100 parts by weight meter of cement, oil-well cement high pressure-bearing low-density palliative, the drag reduction of 0.4 parts by weight with 30-35 parts by weight
After agent, the fluid loss agent of 1.5 parts by weight, the retarder of 0.1 parts by weight mix, water is added to be configured to liquid-solid ratio as 0.6 cementing concrete
Slurry.
9. according to the application process of high pressure-bearing low-density palliative of the oil-well cement described in claim 7 or 8, feature exists
In：The drag reducer is SWJZ-1 type drag reducers, and the fluid loss agent is SWJ-4 type drag reducers, and the retarder is
SWH-1 type retarder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111849440A (en) * | 2020-06-29 | 2020-10-30 | 尧柏特种水泥技术研发有限公司 | Low-thixotropic low-density oil well cement slurry for oil and gas well cementing treatment |
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| CN111849440B (en) * | 2020-06-29 | 2023-03-28 | 尧柏特种水泥技术研发有限公司 | Low-thixotropic low-density oil well cement slurry for oil and gas well cementing treatment |
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