CN101161760A - Oil well cement-injection pad fluid admixture and preparation method - Google Patents
Oil well cement-injection pad fluid admixture and preparation method Download PDFInfo
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- CN101161760A CN101161760A CNA2007101756656A CN200710175665A CN101161760A CN 101161760 A CN101161760 A CN 101161760A CN A2007101756656 A CNA2007101756656 A CN A2007101756656A CN 200710175665 A CN200710175665 A CN 200710175665A CN 101161760 A CN101161760 A CN 101161760A
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Abstract
The invention provides a lead admixture for oil well cement, which is used in cementing operation. The invention is characterized in that: the invention comprises microcapsule emulsified tackifier and diluting, grinding, antigelling agent, the weight percent of the two components is 40 to 50 percent:50 to 60 percent, wherein, the weight percent of the composition of microcapsule emulsified tackifier is as follows: 30 to 40 percent of Sorbitan Monostearate emulsifying agent, 60 to 70 percent of sodium carboxymethylcellulose; and the weight percent of the composition of the diluting, grinding and antigelling agent is as follows: 30 to 40 percent of sulfonated tannin, 30 to 40 percent of fine silica powder, 10 to 25 percent of sodium sulfate, and 10 to 25 percent of sodium carbonate. The invention has the advantages that: the lead compounded by the lead admixture for oil well cement has good slurrycompatibility with drilling fluid and oil well grout. And flushing fluid, weighted spacer fluid, viscoelastic spacer fluid and displacement fluid can be prepared by compounding with the lead admixture for oil well cement. The lead admixture for oil well cement has the characteristic of high dissolution rate and easy field compounding.
Description
Technical field
The present invention relates to oil, Sweet natural gas, well cementing technology field, particularly well cementation is a kind of preparation method that can prepare the cementing slurry with washing fluid, spacer pad and tamponade liquid admixture with cementing spearhead admixture.
Background technology
Before the oil gas well cementing operation cement injection, keep apart in order to make grout and drilling fluid, improve displacement efficiency, need between grout and drilling fluid, inject a kind of liquid, the liquid that is injected is referred to as the grout spearhead.Why to use the grout spearhead? because the grout liquid phase is saturated C
a(OH)
2Solution, in case and drilling fluid mixed, the clay component generation calcium in the drilling fluid is invaded the agglutinating matter that forms the thickness agglomerate, makes mixture become mobile extreme difference or can not the mobile colloid; Contain a large amount of macromolecular materials and ionic group in addition in the drilling fluid, mentioned component has very strong flocculation and the effect of dodge coagulating to grout, makes the extreme difference that the flowability of mixture becomes even loses flowability.So, will use the grout spearhead that grout and drilling fluid are kept apart during well cementation in order to improve displacement efficiency and cementing operation safety.
Spearhead can be divided into washing fluid and spacer pad by its function; Washing fluid has viscosity and the shear force that reduces drilling fluid usually, improves the displacement efficiency to drilling fluid, the effect that improves the cement mantle interface cementing strength; And spacer pad is to lay particular emphasis on to separate drilling fluid and grout, prevent to be in contact with one another pollution, also have the slump in of preventing simultaneously and press layer fluid quietly to prevent the effect of well kick.
The grout spearhead is made up of clear water, high-density weighting material and admixture.Admixture composition classification by using can be divided into:
Water glass type spearhead, this spearhead has certain viscosity, can improve displacement efficiency, but bad with the grout consistency, influences its flowability.
Dilution type spearhead, this spearhead are main component with the diluent of drilling liquid, can dilute drilling fluid, improve flush efficiency, but influence borehole wall stability.
The cellulose-type spearhead, this spearhead can improve the mean density of fluid column, can press layer quietly, but on-the-spot preparation difficulty.
The polymer-type spearhead, this spearhead can improve the mean density of fluid column, but the cost height, on-the-spot preparation difficulty.
Chinese patent notification number CN1205298C provides a kind of high density flushing spacer fluid and preparation method thereof.This high density flushing spacer fluid belongs to the spearhead of a kind of Mierocrystalline cellulose and mixed with polymers type, each composition of employed admixture and proportioning be by weight: carboxymethyl cellulose 1.0-1.5 part, Burow Solution 2.0-2.5 part, acetone 1.8-2.0 part, alkylol amide 0.5-1.0 part, barite 30-170 part.
Summary of the invention:
The purpose of this invention is to provide a kind of oil well cement-injection pad fluid admixture, be adapted to the operation of oil gas water well cementing, oil well cement-injection pad fluid admixture and various types of drilling fluid system and mortar architecture consistency are good; Can improve displacement efficiency, improve the cement mantle interface cementing strength.
The technical solution used in the present invention is:
Oil well cement-injection pad fluid admixture is made up of microcapsule emulsified tackifier and dilution, grinding, two kinds of components of anti-gelling agent, and the weight percent of two kinds of components is: microcapsule emulsified tackifier, 40～50%; Dilution, grinding, anti-gelling agent, 50～60%.
Wherein: each weight percentages of components of microcapsule emulsified tackifier is: sorbitol anhydride monostearate, 30～40%; Xylo-Mucine (CMC), 60～70%.
The manufacture method of microcapsule emulsified tackifier is: sorbitol anhydride monostearate tensio-active agent is added in the kneader, mediate 60 ℃～90 ℃ of temperature, after sorbitol anhydride monostearate emulsifying agent melts, add Xylo-Mucine, under 60 ℃～90 ℃ temperature condition, stir.Make sorbitol anhydride monostearate emulsifier package be rolled in the Xylo-Mucine particle surface, forming with sorbitol anhydride monostearate emulsifying agent is the wall material, is the microcapsule emulsified tackifier of core with the Xylo-Mucine particle.Be cooled to and obtain the microcapsule emulsified tackifier after normal temperature is pulverized.
Wherein: dilution, grinding, each weight percentages of components of anti-gelling agent are: sulfonation tannin (SMT) 30～40%; Fine silica powder, 30～40%; Sodium sulfate, 10～25%; Yellow soda ash, 10～25%.
The manufacture method of dilution, grinding, anti-gelling agent is: sulfonation tannin (SMT), fine silica powder (little silicon), sodium sulfate and yellow soda ash are added in the mixing machine by weight percentage, mix at normal temperatures, make dilution, grinding, anti-gelling agent.
Microcapsule emulsified tackifier and dilution, grinding, two kinds of components of anti-gelling agent mix, and obtain oil well cement-injection pad fluid admixture.
The method of the on-the-spot preparation of well cementation spearhead is: add the oil well cement-injection pad fluid admixture 1～3% of clear water weight in mixing tank, fully circulation was stirred 10 minutes, both can be configured to washing fluid.The washing fluid that is mixed with injects into well, and can adapt to 10 ℃～140 ℃ of downhole temperature scopes.
If preparation increases the weight of spacer pad, visco-elasticity spacer pad and tamponade liquid, can adapt to 10 ℃～90 ℃ of downhole temperature scopes.
The molecular formula of sorbitol anhydride monostearate: C
24H
46O
6Molecular mass: 430.63; Chinese: anhydro sorbitol monooctadecyl acid ester; ; Sorbitan stearate; Sorbitan stearate; Emulsifying agent S-60.Character: yellowish frangible wax, fusing point 56-58 ℃.Hot water be can be scattered in, deep fat class and common organic solvents are dissolved in.Little have a fatty smell.Production method:, get with the stearic acid esterification by Sorbitol Powder dehydration Cheng Huanhou.Daliang City, Liaoning Province Lvshun auxiliary chemicals factory produces, and is embodied in the Chinese Chemicals catalogue.
The sulfonation tannin is that Chinese gallotanninic acid is formed through sulfonation and other chemical modification.It is strong to have water-absorbent, characteristics soluble in water.In the water-based mud system good thinner or viscosity-depression agent.Can reduce the viscosity and the shear force of mud effectively.Also can keep certain viscosity reduction ability in salty mud, saturated saltwater mud, anti-Ca2+ pollutes and can reach more than the 1000mg/L.Under 180-200 ℃ hot conditions, it can improve the high-temperature stability of mud, the rheological property of mud under the control high temperature.There is production marketing in Chengdu Chuan Feng chemical engineering limited liability company.
The beneficial effect of oil well cement-injection pad fluid admixture of the present invention is: it is fast to have dissolution rate, the on-the-spot characteristics of preparation easily.Utilize the spearhead of this oil well cement-injection pad fluid admixture preparation and drilling fluid and oil well cement paste consistency good.Utilize this oil well cement-injection pad fluid admixture can prepare washing fluid, increase the weight of spacer pad, visco-elasticity spacer pad and tamponade liquid.
Oil well cement-injection pad fluid admixture of the present invention belongs to the plain oil well cement-injection pad fluid admixture of composite fibre, compare with simple Mierocrystalline cellulose spearhead admixture, has following advantage: because the Xylo-Mucine particle is through sorbitol anhydride monostearate emulsifying agent parcel, form microcapsule, make product be dispersed in the water easily, accelerated Xylo-Mucine tackifier dissolution rate, so on-the-spot preparation easily; Contain tensio-active agent in the injecting cement in oil well spearhead, so oil-base mud is had cleaning function; In the injecting cement in oil well spearhead composite sulfonation tannin (SMT), so drilling fluid is had diluting effect; In the injecting cement in oil well spearhead composite fine silica powder (little silicon), so wall cake is had the grinding souring; Composite sodium sulfate and yellow soda ash can resist cementitious grout in the injecting cement in oil well spearhead.Oil well cement-injection pad fluid admixture has and is convenient to transportation, storage in addition, has the easy characteristics of on-the-spot preparation simultaneously.
Embodiment
Embodiment 1: preparation oil well cement-injection pad fluid admixture test sample
Take by weighing 400g sorbitol anhydride monostearate emulsifying agent, in small-sized kneader, be heated to 90 ℃, after sorbitol anhydride monostearate emulsifying agent melts fully, turn on agitator, stirring adding 600g Xylo-Mucine under the kneading condition, stir and mediate after 2 hours, give kneader water flowing cooling, cool to room temperature.The sample that obtains is pulverized, can be obtained middle sample microcapsule emulsified tackifier.
Take by weighing sulfonation tannin (SMT) 500g, fine silica powder (little silicon) 500g, sodium sulfate 250g, yellow soda ash 250g, add in the small-sized mixing machine and mixed 10 minutes, add microcapsule emulsified tackifier 1000g then and mix, both can obtain the oil well cement-injection pad fluid admixture sample.
The washing fluid that the preparation laboratory is used
Take by weighing 10g oil well cement-injection pad fluid admixture sample and put into beaker, add 500ml water, stirred 10 minutes, both can obtain washing fluid with stirring rod.This washing fluid respectively with drilling fluid and grout according to 20: 80,50: 50,80: 20 mixed of volume ratio, press the method flow measurement sex change of SY/T 5546-92 regulation, its apparent viscosity is all less than joining corresponding drilling fluid and the grout that slurry uses.Illustrate that this washing fluid has diluting effect to drilling fluid, does not produce the thickening phenomenon to grout.
Preparation increases the weight of spacer pad
Take by weighing 30g oil well cement-injection pad fluid admixture sample and put into beaker, add 500ml water, stirred 10 minutes, add the 600g barite then, after stirring, both can obtain density 1.72～1.80g/cm with stirring rod
3Increase the weight of spacer pad.Be placed under 60 ℃ of conditions static 2 hours increasing the weight of spacer pad, measure upper and lower density respectively by the method for SY/T 5546-92 regulation, density difference is less than ± 0.04.
Increase the weight of spacer pad and grout compatibility test:
The spacer pad that increases the weight of of preparation is mixed by different ratios with G class g cement magma, press the method for SY/T 5546-92 regulation, under 77 ℃ of conditions of simulation downhole temperature, carry out compatibility test, test-results sees Table 1:
Table 1: increase the weight of spacer pad and G class g cement magma compatibility test
| Spacer pad: grout % | Initial consistency BC | Degree of mobilization cm | Thickening time min | Filter loss ml |
| 0∶100 | 19 | 20 | 65 | 1987 |
| 10∶90 | 16 | 19 | 165 | 1876 |
| 20∶80 | 14 | 20 | 289 | 1133 |
| 50∶50 | 13 | 21 | ＞350 | 628 |
| 80∶20 | 12 | 22 | ＞350 | 437 |
| 90∶10 | 12 | 22 | ＞350 | 203 |
| 100∶0 | 11 | 22 | ＞350 | 98 |
Testing data shows that increasing the weight of spacer pad and grout has good consistency, can not produce serious gelling and flocculation phenomenon after the multiple mixed.Along with the spacer pad dosage increases, initial consistency reduces, and degree of mobilization changes little, considers vector and reduces, and the thickening time prolongs.
Embodiment 2: take by weighing the 350kg sorbitol anhydride monostearate emulsifying agent that Daliang City, Liaoning Province Lvshun auxiliary chemicals factory produces, in kneader, be heated to 80 ℃, after sorbitol anhydride monostearate emulsifying agent melts fully, turn on agitator, stirring adding 650kg Xylo-Mucine under the kneading condition, stir and mediate after 2.5 hours, give kneader water flowing cooling, cool to room temperature.The product that obtains is pulverized, can be obtained intermediates microcapsule emulsified tackifier.
Take by weighing sulfonation tannin (SMT) 350kg that Chengdu Chuan Feng chemical engineering limited liability company produces, fine silica powder (little silicon) 350kg, sodium sulfate 100kg, yellow soda ash 200kg, adding mixing machine mixed 15 minutes, add the microcapsule emulsified tackifier 1000kg that crushes then, mix, can obtain the on-the-spot oil well cement-injection pad fluid admixture 2000kg that uses.
Embodiment 3: take by weighing 270kg sorbitol anhydride monostearate emulsifying agent, in kneader, be heated to 85 ℃, after sorbitol anhydride monostearate emulsifying agent melts fully, turn on agitator, stirring adding 630kg Xylo-Mucine under the kneading condition, stir and mediate after 2.5 hours, give kneader water flowing cooling, cool to room temperature.The product that obtains is pulverized, can be obtained intermediates microcapsule emulsified tackifier.
Take by weighing sulfonation tannin (SMT) 418kg, fine silica powder (little silicon) 352kg, sodium sulfate 198kg, yellow soda ash 132kg, add in the mixing machine and mixed 20 minutes, add the microcapsule emulsified tackifier 900kg that crushes then, mix, can obtain the on-the-spot oil well cement-injection pad fluid admixture 2000kg that uses.
Claims (2)
1. oil well cement-injection pad fluid admixture, it is characterized in that: be made up of microcapsule emulsified tackifier and dilution, grinding, two kinds of components of anti-gelling agent, the weight percent of two kinds of components is: microcapsule emulsified tackifier, 40～50%; Dilution, grinding, anti-gelling agent, 50～60%,
Wherein: each weight percentages of components of microcapsule emulsified tackifier is: sorbitol anhydride monostearate, emulsifying agent code name: S-60,30～40%; Xylo-Mucine, 60～70%;
Wherein: dilution, grinding, each weight percentages of components of anti-gelling agent are: sulfonation tannin, 30～40%; Fine silica powder, 30～40%; Sodium sulfate, 10～25%; Yellow soda ash, 10～25%.
2. the preparation method of oil well cement-injection pad fluid admixture according to claim 1 is characterized in that:
Preparation microcapsule emulsified tackifier: sorbitol anhydride monostearate tensio-active agent is added in the kneader, mediate 60 ℃～90 ℃ of temperature, after sorbitol anhydride monostearate tensio-active agent melts, add Xylo-Mucine, under 60 ℃～90 ℃ temperature condition, stir;
Preparation dilution, grinding, anti-gelling agent: sulfonation tannin, fine silica powder, sodium sulfate and yellow soda ash are added in the mixing machine by weight percentage, mix at normal temperatures, make dilution, grinding, anti-gelling agent,
Microcapsule emulsified tackifier and dilution, grinding, two kinds of components of anti-gelling agent mix, and obtain oil well cement-injection pad fluid admixture.
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| CNB2007101756656A CN100572491C (en) | 2007-10-10 | 2007-10-10 | Oil well cement-injection pad fluid admixture and preparation method |
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| CNB2007101756656A CN100572491C (en) | 2007-10-10 | 2007-10-10 | Oil well cement-injection pad fluid admixture and preparation method |
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| CN105331342A (en) * | 2015-12-04 | 2016-02-17 | 中国石油集团西部钻探工程有限公司 | Tamponade liquid for well completion and cementation and preparation method thereof |
| CN105331342B (en) * | 2015-12-04 | 2018-07-06 | 中国石油集团西部钻探工程有限公司 | Gu completion tamponade liquid and preparation method thereof |
| CN110551489A (en) * | 2018-06-04 | 2019-12-10 | 中国石油化工股份有限公司 | permeable solidification front liquid system and preparation method thereof |
| CN110551489B (en) * | 2018-06-04 | 2022-06-07 | 中国石油化工股份有限公司 | Permeable solidification pre-liquid system and preparation method thereof |
| CN109135697A (en) * | 2018-09-18 | 2019-01-04 | 中国石油集团西部钻探工程有限公司 | Ultra high density displacement of reservoir oil insulating liquid resistant to high temperatures and preparation method thereof |
| CN109135697B (en) * | 2018-09-18 | 2020-10-16 | 中国石油集团西部钻探工程有限公司 | High-temperature-resistant ultrahigh-density oil displacement isolation liquid and preparation method thereof |
| CN114426816A (en) * | 2020-09-21 | 2022-05-03 | 中国石油化工股份有限公司 | High-temperature-resistant well cementation spacer fluid and preparation method and application thereof |
| CN112960875A (en) * | 2021-02-25 | 2021-06-15 | 广西博世科环保科技股份有限公司 | Treatment method and treatment system for high-temperature thermochemical cleaning of heavy oil sludge |
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