CN102382633B - Silicate grout for deep water - Google Patents
Silicate grout for deep water Download PDFInfo
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- CN102382633B CN102382633B CN201010268763.6A CN201010268763A CN102382633B CN 102382633 B CN102382633 B CN 102382633B CN 201010268763 A CN201010268763 A CN 201010268763A CN 102382633 B CN102382633 B CN 102382633B
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Abstract
The invention discloses silicate grout for deep water, which consists of the following ingredients in parts by mass: 100 parts of cement, 2 to 40 parts of lightening agents, 3 to 7 parts of filtrate or reduction agents, 1 to 5 parts of dispersant, 10 to 50 parts of reinforcing agents, 0.1 to 1.5 parts of retarder and 50 to 100 parts of water. The silicate grout has excellent low-temperature early strength and low-temperature approximately right-angle thickening performance, the defects of slow gel strength development of the silicate grout at low temperature and low density and low early strength are overcome, and the surface casing and cementing operation can be ensured under the conditions of low temperature and low cracking pressure in deep water and complicated air flows in shallow water.
Description
Technical field
The present invention relates to a kind of silicate grout, be specifically related to a kind of silicate grout for deep water.
Background technology
Deep water refers to the marine site that the depth of water is greater than 350 meters, and deep water surface string is the outermost sleeve pipe of deep water hydrocarbon casing program, and its major function has: isolation top sea water layer, does not make seawater and top layer Groundwater infiltration pit shaft; Protection well head, reinforces the borehole wall of top layer, mud line below well section; For continuing, bore down to run into high-pressure oil-gas layer, preventer Prevention of blowout is installed on surface string; During oil-gas mining, extracting device of oil etc. is under water installed.Ocean deepwater top layer pipe well cementing operation environment has low temperature, low formation-parting pressure and has gas hydrate and the outstanding feature of shallow-layer stream.
The technical difficulty of deep water cementing is mainly reflected in: after (1) sea water advanced 1000m of being greater than, temperature is lower than 4 ℃, and the aquation solidifiability of conventional cementing cement is difficult to meet low temperature hydrated requirement; (2) seabed mud line sub-surface parting pressure is low, need to have the variation of low-density grout coupling formation-parting pressure; (3) existence of mud line sub-surface high pressure shallow-layer salt water or other fluid, needs grout to have good right angle consolidation feature, suppresses the generation of shallow-layer stream disaster.Exploitation low-temperature low-density high-intensity cement paste, forms the shallow laminar flow high-efficiency packing structure of low temperature sleeve water mud, is key and the difficult point place that guarantees that ocean deepwater exploratory development is effectively carried out.
While carrying out well cementing operation due to current offshore oilfield, all adopt and blow grey mode cement is blown on drilling unit from cement tanker, after having blown mixed cement, if want the necessary clean defeated ash can in other temperature section stratum of sealing, not so will affect the performance of other interval isolation grout, serious may cause the accident, and clean defeated ash can will increase workload for well cementing operation.At present, domestic also do not have simple G level silicate grout for the report of deep water surface string well cementation.
Summary of the invention
The object of this invention is to provide a kind of silicate grout for deep water.
Grout provided by the invention, is comprised of cement, light-weight additive, water retaining, dispersion agent, toughener, retardant and water; The ratio of quality and the number of copies of described cement, light-weight additive, water retaining, dispersion agent toughener, retardant and water can be 100: (2-40): (3-7): (1-6): (10-50): (0.1-1.5): (50-100).
In grout of the present invention, the ratio of quality and the number of copies of described cement, light-weight additive, water retaining, dispersion agent, toughener, retardant and water specifically can be 100: (2.5-34): (3-4): (1-4): (10-30): (0.1-1.0): (50-80), 100: 2.5: 3: 1: 10: 0.1: 50,100: 5: 4: 2: 15: 0.2: 60,100: 13: 5: 3: 20: 0.5: 70,100: 18: 5: 4: 25: 0.8: 80 or 100: 40: 7: 5: 50: 1.5: 100.
In grout of the present invention, described cement can be silicate cement, magnificent G class g cement as good in 1.20-1.80.
In silicate grout of the present invention, described light-weight additive can be hollow glass micropearl; Described hollow glass micropearl can be silicic-boric acid calcium salt; The density of described hollow glass micropearl is 0.44g/cm
3.Under 70MPa pressure, the residual motility rate of described glass microballon is more than 90%, water insoluble and oily, has incompressibility, is low alkalinity, has compatibility with most resene material, has the function that reduces viscosity and improve liquidity.
In silicate grout of the present invention, described water retaining can be high molecular weight water soluble polymer; Described high molecular weight water soluble polymer can be 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer or acrylamide-sodium acrylate copolymer; The number-average molecular weight of described 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer is 100000～1000000g/mol, and the number-average molecular weight of described acrylamide-sodium acrylate copolymer is 200000～2000000g/mol.
In silicate grout of the present invention, described dispersion agent can be in modified lignin mahogany sulfonate and following substances any mixture: any mixture in sodium polystyrene sulfonate, sodium carbonate, water glass, sodium aluminate and Sodium Tetraborate or acetonformaldehyde condenses and following substances: sodium polystyrene sulfonate, sodium carbonate, water glass, sodium aluminate and Sodium Tetraborate.
In silicate grout of the present invention, described modified lignin mahogany sulfonate can be calcium lignin sulphonate or sodium lignosulfonate; Described acetonformaldehyde condenses can be formaldehyde and the acetone mol ratio polymerisate of 2: 1.
In silicate grout of the present invention, described toughener can be in the mixture of slag powders and cement or the mixture of slag powders and cement and following substances any mixture: sodium sulfate, Repone K, SODIUMNITRATE, sodium metaaluminate, potassium silicate and calcium oxide; Described slag powders specifically can be following ultrafine slag powder: the particle diameter that mass percent is greater than 90% slag powders is less than 20 μ m; Described cement can be superfine cement, and described superfine cement specifically can be following G class g cement: the particle diameter that mass percent is greater than 90% ultra-fine G class g cement is less than 7 μ m.
In silicate grout of the present invention, described retardant can be at least one in soluble tartrate, sodium tartrate, boric acid and organophosphate.
In silicate grout of the present invention, described water can be fresh water or seawater, and this seawater can be arbitrary deep sea water in South China Sea, the East Sea and the Bohai Sea.
Silicate grout of the present invention has the following advantages:
1) what use is common G level silicate cement, has lower cost, and other source, component market is comparatively extensive, with low cost, has broad application prospects;
2) grout cement used is a kind of cement maximum with the on-the-spot Cementing application at current sea, and the adaptability of grout and equipment is better, does not need special equipment, and cement operations is convenient;
3) on-the-spot well cementation is the same with the working method of common shallow well cementing slurry, convenient working personnel construction;
4) grout has superior safety energy, and cement slurry thickening time is insensitive for temperature variation;
5) density of grout and thickening time controllable, good fluidity, fluid loss is less, can meet deep water cementing job requirements;
6) grout has excellent nearly " right angle multiviscosisty " performance, for anti-shallow-layer stream, has excellent effect;
7) time of coagulation under low temperature, shorter and Behavior of Hardened Cement Paste had excellent early anti pressured intension, can effectively reduce the well cementation Hou Ning time (WOC), shortened construction cycle;
8) grout has lower hydration heat amount and can effectively reduce the impact of gas hydrate dissociation on Oil/gas Well.
The invention provides a kind of technology reliable, site operation is simple and convenient, with low cost, can meet low temperature, low formation-parting pressure, shallow-layer stream, deepwater well cementing mortar under gas hydrate condition, fills up the blank of domestic deep water surface string silicate grout.
Embodiment
The experimental technique using in following embodiment if no special instructions, is ordinary method.
In following embodiment, material used, reagent etc., if no special instructions, all can obtain from commercial channels.
The good magnificent G class g cement of the following embodiment of the present invention 1.20-1.80 used is silicate cement, buys in Jia Hua cement mill, Sichuan; Ultrafine slag powder is bought in Jing Zhou Jia Hua Science and Technology Ltd.; Ultra-fine G class g cement is bought in cement mill, Ge Zhou Ba; Hollow silicic-boric acid calcium microballon is bought in Minnesota Mining and Manufacturing Company.
The specification of the following embodiment of the present invention ultrafine slag powder used is: the particle diameter that mass percent is greater than 90% slag powders is less than 20 μ m; The specification of ultra-fine G class g cement is: the particle diameter that mass percent is greater than 90% G class g cement is less than 7 μ m.
The preparation of embodiment 1, silicate grout
Formula is: the mixture 25Kg of 1.20 good magnificent G class g cement 100Kg, South China Sea deep-sea water 100Kg, ultrafine slag powder and ultra-fine G class g cements (wherein, the ratio of quality and the number of copies of ultrafine slag powder and ultra-fine G class g cement is 2: 3), (number-average molecular weight is 5000g/mol for soluble tartrate 0.1Kg, calcium lignin sulphonate (Jing Zhou Jia Hua Science and Technology Ltd.) and sodium polystyrene sulfonate, Jing Zhou Jia Hua Science and Technology Ltd.) mixture 3Kg (wherein, the ratio of quality and the number of copies of calcium lignin sulphonate and sodium polystyrene sulfonate is 2: 1), (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 34Kg, 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer (number-average molecular weight is 100000g/mol) 5Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
The preparation of embodiment 2, silicate grout
Formula is: the mixture 20Kg of 1.40 good magnificent G class g cement 100Kg, deep-sea, Chinese Bohai Sea water 70Kg, ultrafine slag powder, ultra-fine G class g cement and sodium sulfate (wherein, the ratio of quality and the number of copies of ultrafine slag powder, ultra-fine G class g cement and sodium sulfate is 2: 3: 1), the mixture 2Kg (wherein, the ratio of quality and the number of copies of calcium lignin sulphonate and sodium carbonate is 1: 1) of calcium lignin sulphonate (Jing Zhou Jia Hua Science and Technology Ltd.) and sodium carbonate, (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 18Kg, acrylamide-sodium acrylate copolymer (number-average molecular weight is 2000000g/mol) 4Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
The preparation of embodiment 3, silicate grout
Formula is: the mixture 10Kg of 1.50 good magnificent G class g cement 100Kg, fresh water 60Kg, ultrafine slag powder, ultra-fine G class g cement and Repone K (wherein, the ratio of quality and the number of copies of ultrafine slag powder, ultra-fine G class g cement and Repone K is 2: 3: 1), the mixture 1Kg (wherein, the ratio of quality and the number of copies of calcium lignin sulphonate and water glass is 1: 1) of calcium lignin sulphonate (Jing Zhou Jia Hua Science and Technology Ltd.) and water glass, (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 13Kg, acrylamide-sodium acrylate copolymer (number-average molecular weight 200000g/mol) 3Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
The preparation of embodiment 4, silicate grout
Formula is: the mixture 30Kg of 1.60 good magnificent G class g cement 100Kg, fresh water 50Kg, ultrafine slag powder, ultra-fine G class g cement and SODIUMNITRATE (wherein, the ratio of quality and the number of copies of ultrafine slag powder, ultra-fine G class g cement and SODIUMNITRATE is 2: 3: 1), the mixture 4Kg of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid sodium (Jing Zhou Jia Hua Science and Technology Ltd.) 0.8Kg, sodium lignosulfonate (Jing Zhou Jia Hua Science and Technology Ltd.) and water glass (wherein, the ratio of quality and the number of copies of sodium lignosulfonate and water glass is 1: 1), (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 9Kg, 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer (number-average molecular weight 1000000g/mol) 6Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
The preparation of embodiment 5, silicate grout
Formula is: the mixture 50Kg of 1.70 good magnificent G class g cement 100Kg, Chinese Bohai Sea deep sea water 80Kg, ultrafine slag powder, ultra-fine G class g cement and sodium metaaluminate (wherein, the ratio of quality and the number of copies of ultrafine slag powder, ultra-fine G class g cement and sodium metaaluminate is 2: 3: 1.2), the compound 3Kg (wherein, the ratio of quality and the number of copies of sodium lignosulfonate and sodium aluminate is 1: 1) of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid sodium 1.0Kg, sodium lignosulfonate (Jing Zhou Jia Hua Science and Technology Ltd.) and sodium aluminate, (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 5Kg, 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer (number-average molecular weight 500000g/mol) 5Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
The preparation of embodiment 6, silicate grout
Formula is: mixture 15Kg (wherein, the ratio of quality and the number of copies of ultrafine slag powder, ultra-fine G class g cement and Sodium Tetraborate is 2: 2: 1.2), soluble tartrate 0.1Kg, acetonformaldehyde condenses (formaldehyde and the acetone mol ratio polymerisate of 2: the 1) 3Kg of 1.80 good magnificent G class g cement 100Kg, South China Sea deep sea water 50Kg, ultrafine slag powder, ultra-fine G class g cement and Sodium Tetraborate, (its density is 0.44g/cm to hollow silicic-boric acid calcium microballon
3) 2.5Kg, acrylamide-sodium acrylate copolymer (number-average molecular weight 1000000g/mol) 5Kg.
The component of said ratio is mixed and obtains silicate grout, according to deep water cementing touchstone API10B-3-2004 standard, it is carried out to performance test, the performance test results is as shown in table 1.
Table 1 surface casing cementing embodiment 1-6 silicate grout the performance test results
In table 1, the mensuration of " 15 ℃ of temperature change value that adiabatic environment grout aquation produces " is carried out in 15 ℃ of airtight adiabatic isoperibols.
Data are known as shown in Table 1:
(1) silicate grout for deep water of the present invention has good stability and multiviscosisty controllability, and constructability design, is conducive to save the wellsite operation time;
(2) silicate grout for deep water of the present invention has good low temperature early strength and low filtration loss, can fully meet deep water surface casing cementing job requirements.
Claims (2)
1. a grout, is comprised of cement, light-weight additive, water retaining, dispersion agent, toughener, retardant and water; The ratio of quality and the number of copies of described cement, light-weight additive, water retaining, dispersion agent, toughener, retardant and water is 100:(2-40): (3-7): (1-5): (10-50): (0.1-1.5): (50-100);
Described light-weight additive is hollow glass micropearl; Described hollow glass micropearl is silicic-boric acid calcium salt; The density of described hollow glass micropearl is 0.44g/cm
3;
Described water retaining is high molecular weight water soluble polymer; Described high molecular weight water soluble polymer is 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer or acrylamide-sodium acrylate copolymer; The number-average molecular weight of described 2-acrylamide-2-methyl propane sulfonic-acrylamide copolymer is 100000g/mol～1000000g/mol, and the number-average molecular weight of described acrylamide-sodium acrylate copolymer is 200000g/mol～2000000g/mol;
Described dispersion agent is any mixture in modified lignin mahogany sulfonate and following substances: any mixture in sodium polystyrene sulfonate, sodium carbonate, water glass, sodium aluminate and Sodium Tetraborate or acetonformaldehyde condenses and following substances: sodium polystyrene sulfonate, sodium carbonate, water glass, sodium aluminate and Sodium Tetraborate; Described modified lignin mahogany sulfonate is calcium lignin sulphonate or sodium lignosulfonate; Described acetonformaldehyde condenses is the polymerisate of formaldehyde and acetone mol ratio 2:1;
Described toughener is any mixture in the mixture of slag powders and cement or the mixture of slag powders and cement and following substances: sodium sulfate, Repone K, SODIUMNITRATE, sodium metaaluminate, potassium silicate and calcium oxide;
Described retardant is at least one in soluble tartrate, sodium tartrate, boric acid and organophosphate,
Described cement is silicate cement, and described silicate cement is the good magnificent G class g cement of 1.20-1.80.
2. grout according to claim 1, is characterized in that: described water is fresh water or seawater.
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| CN106477947A (en) * | 2016-10-12 | 2017-03-08 | 佛山迅拓奥科技有限公司 | A kind of additive improving cement-based material early hardness and its preparation method and application |
| CN106634902B (en) * | 2016-12-19 | 2019-08-23 | 西南石油大学 | The molten hydraulic cementing materials of high temperature resistant theobromine and be used for oil-well cement slurry system |
| CN106986584B (en) * | 2017-03-23 | 2020-01-07 | 中国石油天然气集团公司 | Low-temperature high-strength and high-toughness cement slurry as well as preparation method and application thereof |
| CN107502324B (en) * | 2017-08-22 | 2020-09-22 | 中国海洋石油集团有限公司 | Multi-effect additive for well cementation low-density cement slurry and preparation method thereof |
| CN110526637A (en) * | 2019-09-25 | 2019-12-03 | 嘉华特种水泥股份有限公司 | A kind of ocean deepwater well cementation low-temperature high-early strength mortar architecture |
| CN111380237A (en) * | 2020-03-27 | 2020-07-07 | 甘肃省建材科研设计院有限责任公司 | Heat exchange device for heat transfer medium and underground medium-deep rock soil |
| CN111909742B (en) * | 2020-06-18 | 2022-04-22 | 华南理工大学 | Boric acid solution gas hydrate accelerant and application thereof in preparation of gas hydrate with high gas storage density |
| CN115477491B (en) * | 2022-09-26 | 2023-12-01 | 中海石油(中国)有限公司 | Superfine early strength agent and cement slurry for low-temperature well cementation based on chemical-mechanical method |
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