CN105462571A - Low-temperature cementing slurry system and composition thereof - Google Patents
Low-temperature cementing slurry system and composition thereof Download PDFInfo
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- CN105462571A CN105462571A CN201510786765.7A CN201510786765A CN105462571A CN 105462571 A CN105462571 A CN 105462571A CN 201510786765 A CN201510786765 A CN 201510786765A CN 105462571 A CN105462571 A CN 105462571A
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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
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
Abstract
The present invention provides a low-temperature cementing slurry system. The slurry system has the characteristics of low density, low temperature early strength and low water loss, and has performances such as thickening time and compressive strength meeting the requirements of deepwater cementing construction site. The low-temperature cementing slurry system comprises the following components by weight: 100 parts of oil well cement, 62-175 parts oil well superfine cement, 7.3-23 parts of nano-silica, 10-32 parts active calcium silicate, 15-50 parts of hollow glass microballoon, 3.6-10 parts of an early strength agent, 3.2-8.6 parts of a fluid loss agent, 0.8-2.0 parts of a dispersing agent and 120-195 parts of water. The low-temperature cementing slurry system has density between 1.30-1.60 g/cm<3>, and is particularly suitable for cementing operations on a deepwater low-temperature surface casing segment. The invention has important significance in reducing the offshore cementing cost, and offshore oil and gas resource exploitation.
Description
Technical field
The present invention relates to low temperature well cementing technology, particularly relate to a kind of deep-water low-temperature well cementing mortar architecture, this mortar architecture has the features such as low-temperature high-early strength, low density, low fluid loss, and the development of thickening time and ultimate compression strength also meets the related request of on-the-spot cementing operation.Therefore, this low temperature well cementing mortar architecture is specially adapted to the well cementing operation of deep-water low-temperature well section surface string.
Background technology
The offshore oil and gas resource of China is mainly distributed in the East Sea, the Bohai Sea and the South Sea, the title that its Zhongnanhai has " second Persian Gulf ".Very abundant hydrocarbon resources is contained at the South Sea, but its most of hydrocarbon resources all buries in deep water area.Along with China's onshore oil field stable yields difficulty increases day by day, need to develop ocean especially deep water hydrocarbon resource as early as possible.And the exploratory development of deep water hydrocarbon resource is subject to the restriction of severe complex environment and reservoir characteristics, there is the feature of excessive risk, hi-tech, high cost.And the Offshore Operation relying on offshore platform is the core link of whole offshore and gas development, the cementing technology integral part that deepwater drilling is very important in developing especially.
Deepwater drilling itself is faced with many challenges, and the deepwater environment of complexity also to make well cementing operation have more difficulties to have to be overcome, as: deep water nearly 0 DEG C low temperature, shallow seated groundwater-air-flow below mud line is dynamic, between formation pore pressure and parting pressure, " window " is narrow, grout displacement efficiency in annular space is low and logistics support is difficult etc.
The complicated rugged environment of deep water proposes following requirement to cementing slurry performance: cement slurry density is little, makes it lower than formation-parting pressure gradient; Curing time is short, energy rapid solidification under low temperature, and forms certain ultimate compression strength; Behavior of Hardened Cement Paste shrinking percentage is little, the stopping property on Behavior of Hardened Cement Paste and stratum and cementing properties good; Cement slurry water loss amount is little.
In recent years, for the performance requriements that deep-water low-temperature well cementation proposes grout, scholars research and develop the well cementing mortar architecture that some can be used in deep-water low-temperature environment.Comprising: " experimental study of Low Temperature Fine Cement With Low Density " (Chen Ying etc., gas industry, 2005/12) the fine cement system studied in a literary composition, the cement particle diameter of this system is 1 ~ 15 μm, effectively can promote the hydration reaction of cement under low temperature; " the two filling low-temperature low-density mortar architecture research of ocean deepwater " (Xu Mingbiao etc., oilfield chemistry, 2006/09) pass through in a literary composition to add solid phase lightening material, whipping agent in grout, and coordinate the use of hardening accelerator, develop two backfilling cement slurry system of low density low-temperature high-early strength; " a kind of sulphoaluminate cement paste for deepwater cementing " (Li Sigui etc., Chinese patent CN101974317A, 2011/02) pass through in patent in aluminosulfate cement, to mix multiple additives, the aluminosulfate cement slurry system with low-temperature high-early strength characteristic be mixed with; " a kind of deepwater well cementing mortar architecture activated based on slag " (step Yuhuan etc., Chinese patent CN102827593A, 2012/12) in patent with the manUfaCtUre of pig iron slag after Water Quenching for well cementing material, add activator and other additives and the deepwater well cementing mortar architecture that is mixed with; And " a kind of deep water cementing anti-shallow-layer stream phosphor aluminate cement slurry " (Xu Mingbiao etc., Chinese patent CN104610948A, 2015/05) in patent, phosphor aluminate cement is become mediation cement with ultrafine high activity slag by the proportions of 9:1, and add other additives to be mixed with the phosphor aluminate cement slurry system with anti-deep water shallow-layer stream effect.Although this several mortar architecture above solves the difficulty of part deep-water low-temperature well cementation, these systems also come with some shortcomings, as: the compatibleness of sulplo-aluminate and phosphor aluminate cement slurry and other grout additives is poor, and cost is higher; The extemporaneous preparation technique of two filling concrete slurry system is comparatively complicated, and the bubble produced in system is difficult to control; The additive (hardening accelerator) added in mortar architecture, while promotion grout forms early strength, also can reduce the final strength of mortar architecture; The denseness of fine cement slurry is higher, and rheological is poor, not easily infusion.
Therefore need, on the basis studied at current deepwater well cementing mortar architecture, to develop new low temperature well cementing method, form new deep-water low-temperature well cementing mortar architecture.This low heat cement slurry system is except having low-density feature and meeting except marine cementing requirements, also need to there is higher hydration rate under deep-water low-temperature condition to shorten " curing time ", and reach enough intensity as early as possible with supporting sleeve weight, ensure that follow-up drilling operation carries out fast.
Along with China accelerates the exploratory development of Marine oil and gas resource, deep-water low-temperature well cementation will be faced with more stern challenge.Although the domestic correlative study having carried out part deep water mortar architecture at present, but still the well cementing operation requirement of deep water complex environment cannot be met completely.Therefore, the low temperature well cementing mortar architecture that active research is novel, for exploitation China Marine oil and gas resource especially deep water hydrocarbon resource have great significance.
Summary of the invention
Object of the present invention is exactly for the problem existing for current China deep water cementing institute's facing challenges and existing low temperature well cementing mortar architecture, by additive types and dosages such as preferred high reactivity silicate material, silicate nano material and light-weight additive, hardening accelerator, water retaining, dispersion agents, form a set of low temperature well cementing mortar architecture being applicable to deep water complex environment.
The present invention is test oil well cement, active calcium silicate, oil well superfine cement, nano silicon, ultimate compression strength, the static gel strength rule of development of hollow glass microballoon when different-grain diameter, different mass ratio first by experiment, and experimentally result adjusts each component particle diameter and mass ratio size, make system ultimate compression strength, static gel strength performance reaches optimum, obtain the essentially consist of cement and each extra material in deep-water low-temperature well cementing mortar architecture; Then, the hardening accelerator material of test analysis different sorts and ratio is on the impact of grout low temperature intensity, optimize the hardening accelerator material and dosage that improve ultimate compression strength effect optimum, the rheology impact of this hardening accelerator to grout be simultaneously little, the development of Behavior of Hardened Cement Paste longtime compressive strength is had no side effect; Finally, by affecting the admixture materials such as the less dispersion agent of side effect, water retaining to hydrated cementitious under screening cold condition, and the performances such as test analysis slurry flowing performance-changing, fluid loss and sedimentation stability, optimize the admixture such as dispersion agent, water retaining substance classes and optimum dosage, thus the final deep-water low-temperature well cementing mortar architecture that formed is filled a prescription.
Low temperature well cementing mortar architecture of the present invention is the low density high-early strength anti-migration mortar architecture being applicable to deep-water low-temperature environment.This mortar architecture is except the low-density requirement of the marine well cementing mortar architecture of satisfied tradition, its low-temperature high-early strength effect, anti-channeling ability are also obvious especially, also there is low fluid loss, easily infusion in addition and the advantage such as formulation operations is simple, and its property indices meets on-the-spot cementing requirements all completely, contribute to shortening the well cementing operation time and reducing costs.
For achieving the above object, the low temperature well cementing mortar architecture of the application, according to mass fraction, it consists of:
Oil well cement 100 parts;
Oil well superfine cement 62 ~ 175 parts;
Nano silicon 7.3 ~ 23 parts;
Active calcium silicate 10 ~ 32 parts;
Hollow glass microballoon 15 ~ 50 parts;
Hardening accelerator 3.6 ~ 10 parts;
Water retaining 3.2 ~ 8.6 parts;
Dispersion agent 0.8 ~ 2.0 part;
120 ~ 195 parts, water.
Described oil well cement can be the one in API oil well G class g cement, oil well A class g cement, oil well C class g cement.
The ultra-fine oil well cement of described oil well can be a kind of super-fine material through fine grinding in oil well G class g cement, oil well A class g cement or oil well C class g cement, and its median size is 3.5 ~ 8.7 μm.
Described nano silicon is amorphous white powder, and microtexture is spherical in shape, and particle diameter is 8.5 ~ 25nm.
Described active calcium silicate is a kind of white solid powder, and its median size is 8.0 ~ 22 μm, and molecular formula is CaOmSiO
2nH
2o, wherein atomicity m is between 2 ~ 4, and the number of crystal water n is between 1 ~ 3.
Described hollow glass microballoon is soda lime borosilicate glass microsphere, and density is 0.30 ~ 0.48g/cm
3, median size is 30 ~ 50 μm, and rupture strength is greater than 30MPa.
Described hardening accelerator is by the proportional solid mixture powder be made into for Lvization Li ︰ Liu Suan Jia ︰ Liu acid Lv Jia ︰ calcium oxide=27 ~ 48 ︰ 25 ~ 57 ︰ 10 ~ 29 ︰ 12 ~ 33 of quality group by lithium chloride, potassium sulfate, potassium aluminium sulfate and calcium oxide.
Described water retaining can be the one in polyvinyl alcohol water retaining, butadiene styrene latex water retaining, vinylacetate-ethylene latex water retaining, acrylamide and 2-acrylamide-2-methyl propane sulfonic (AMPS) the polymeric type water retaining that reinforcing oil well is conventional.
Described dispersion agent can be sulfonation formaldehyde-acetone polycondensate dispersion agent that reinforcing oil well is conventional, or poly naphthalene sulfonate dispersion agent.
Described formulating low-temperature cementing slurry water can be fresh water, seawater and salinity water.
The density of low temperature well cementing grout of the present invention is 1.30 ~ 1.60g/cm
3adjustable in scope, this low temperature well cementing mortar architecture has the following advantages: oil well superfine cement, nano silicon, active calcium silicate, the hollow glass microballoon of (1) the present invention by adding targetedly in oil well cement in certain particle size range, these material granules can form tightly packed system each other, and Behavior of Hardened Cement Paste has the feature of low density, high strength and low permeability; (2) nano silicon can generate gel of calcium silicate thing with hydrolysis product of cement calcium hydroxide, promotes the low temperature hydrated speed of oil well cement, makes mortar architecture have the feature of low-temperature high-early strength; (3) active calcium silicate can be filled in the reticulated structure of hydrated calcium silicate, shortens the aquation inductive phase of oil well cement, and make cementitious grout intensity fast-developing, grout has good anti-channeling ability; (4) low temperature well cementing mortar architecture starting material of the present invention are easy to get, cost is low, and good with conventional cementing admixture compatibleness, and site operation is convenient.
The invention provides one and there is low-temperature high-early strength, low density, low fluid loss, anti-channeling, and the development of thickening time and ultimate compression strength also meets the low temperature well cementing mortar architecture of on-the-spot needs of cementing operations.This low temperature well cementing mortar architecture is specially adapted to the well cementing operation of deep-water low-temperature surface string section.Along with China accelerates the exploitation of Marine oil and gas resource, low temperature well cementing mortar architecture of the present invention has very wide application prospect.
Accompanying drawing explanation
Fig. 1 is low temperature well cementing mortar architecture of the present invention, at 15 DEG C, the static gel strength progress curve figure that adopts Chandler company of U.S. StaticGelStrengthAnalyzer (Model5265UwithUCAfunctionality) to test under 25MPa condition.Test result shows, the development of the static gel strength of low temperature well cementing mortar architecture is fast, and particularly static gel strength is very short for transit time of developing into 240Pa from 48Pa, and this illustrates that low temperature well cementing grout has good anti-channeling ability.
Fig. 2 is low temperature well cementing mortar architecture of the present invention and G class g cement magma, the ultimate compression strength column comparison diagram of difference maintenance 24h, 48h under 10MPa, condition of different temperatures.Test result shows, the ultimate compression strength that low temperature well cementing mortar architecture is 7 DEG C is all obviously greater than the ultimate compression strength of G level magma system, can find out that this mortar architecture has preferably low-temperature high-early strength performance; At 20 DEG C and 40 DEG C, this mortar architecture has good ultimate compression strength equally, can meet on-the-spot cementing requirements.
Embodiment
Experimental technique: prepare low temperature well cementing grout, oil well G class g cement magma by standard GB/T19139-2003 " oil-well cement test method ", and the properties of reference standard SY/T6544-2003 " oil well cement paste performance requriements " test well cementation slurry.
Embodiment 1: the composition of low temperature well cementing mortar architecture
A kind of low temperature well cementing mortar architecture can be made up of following material, and the mass fraction of each material is specially: oil well cement is 100 parts, oil well superfine cement is 125 parts, nano silicon is 10.5 parts, active calcium silicate is 24.6 parts, hollow glass microballoon is 26 parts, hardening accelerator is 6.2 parts, water retaining is 4.3 parts, dispersion agent is 1.36 parts, water is 165 parts.
Embodiment 2: the slurry performance test of low temperature well cementing mortar architecture
Be tested object with the low temperature well cementing cement slurry of embodiment 1, first low temperature well cementing mortar architecture solid dry ash component with slurry and liquid water component are weighed separately and mix, then prepare slurry by standard GB/T19139-2003 " oil-well cement test method ", reference standard SY/T6544-2003 " oil well cement paste performance requriements " measures the performance such as density, API fluid loss, rheological property of mud.Test-results is in table 1.
The slurry performance of table 1 low temperature well cementing mortar architecture
Embodiment 3: the intensity test of low temperature well cementing mortar architecture
Be tested object with the low temperature well cementing cement slurry of embodiment 1, first low temperature well cementing mortar architecture solid dry ash component with slurry and liquid water component are weighed separately and mix, then slurry is prepared by standard GB/T19139-2003 " oil-well cement test method ", under 10MPa, condition of different temperatures, measure ultimate compression strength after maintenance 24h, 48h respectively, and contrast with the ultimate compression strength of oil well G class g cement magma (water cement ratio is 0.44).Test-results is in table 2.
The ultimate compression strength performance of table 2 low temperature well cementing mortar architecture
Certainly; the above is only one embodiment of the present invention; should be understood that those skilled in the art; under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications all belong within the protection domain of the claims in the present invention.
Claims (10)
1. a low temperature well cementing mortar architecture, it is characterized in that each component and part by weight as follows:
2. low temperature well cementing mortar architecture according to claim 1, is characterized in that described oil well cement can be the one in API oil well G class g cement, oil well A class g cement, oil well C class g cement.
3. low temperature well cementing mortar architecture according to claim 1, it is characterized in that described ultra-fine oil well cement can be a kind of super-fine material through fine grinding in oil well G class g cement, oil well A class g cement or oil well C class g cement, its median size is 3.5 ~ 8.7 μm.
4. low temperature well cementing mortar architecture according to claim 1, it is characterized in that described nano silicon is amorphous white powder, microtexture is spherical in shape, and particle diameter is 8.5 ~ 25nm.
5. low temperature well cementing mortar architecture according to claim 1, it is characterized in that described active calcium silicate is a kind of white solid powder, its median size is 8.0 ~ 22 μm, and molecular formula is CaOmSiO
2nH
2o, wherein atomicity m is between 2 ~ 4, and the number of crystal water n is between 1 ~ 3.
6. low temperature well cementing mortar architecture according to claim 1, it is characterized in that described hollow glass microballoon is soda lime borosilicate glass microsphere, density is 0.30 ~ 0.48g/cm
3, median size is 30 ~ 50 μm, and rupture strength is greater than 30MPa.
7. low temperature well cementing mortar architecture according to claim 1, is characterized in that described hardening accelerator is by the proportional solid mixture powder be made into for Lvization Li ︰ Liu Suan Jia ︰ Liu acid Lv Jia ︰ calcium oxide=27 ~ 48 ︰ 25 ~ 57 ︰ 10 ~ 29 ︰ 12 ~ 33 of quality group by lithium chloride, potassium sulfate, potassium aluminium sulfate and calcium oxide.
8. low temperature well cementing mortar architecture according to claim 1, is characterized in that described water retaining can be the one in polyvinyl alcohol water retaining, butadiene styrene latex water retaining, vinylacetate-ethylene latex water retaining, acrylamide and 2-acrylamide-2-methyl propane sulfonic (AMPS) the polymkeric substance water retaining that reinforcing oil well is conventional.
9. low temperature well cementing mortar architecture according to claim 1, is characterized in that described dispersion agent can be sulfonation formaldehyde-acetone polycondensate dispersion agent that reinforcing oil well is conventional, or poly naphthalene sulfonate dispersion agent.
10. low temperature well cementing mortar architecture according to claim 1, is characterized in that described preparation mortar architecture water can be fresh water, seawater and salinity water.
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| CN105906248A (en) * | 2016-05-04 | 2016-08-31 | 四川凯尔油气田技术服务有限公司 | Low-temperature early-strength salt-resistant well cement slurry system |
| CN106543985A (en) * | 2016-09-30 | 2017-03-29 | 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 emulsion-type oil-well cement filtrate reducer and preparation method thereof |
| CN106634899A (en) * | 2016-09-22 | 2017-05-10 | 中国石油大学(华东) | A liquid colloid filling low-temperature well-cementing cement mortar system |
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