CN102838973A - Deep continental scientific drilling high-temperature resistant cementing material - Google Patents
Deep continental scientific drilling high-temperature resistant cementing material Download PDFInfo
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- CN102838973A CN102838973A CN2012103733503A CN201210373350A CN102838973A CN 102838973 A CN102838973 A CN 102838973A CN 2012103733503 A CN2012103733503 A CN 2012103733503A CN 201210373350 A CN201210373350 A CN 201210373350A CN 102838973 A CN102838973 A CN 102838973A
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Abstract
The invention relates to a deep continental scientific drilling high-temperature resistant cementing material which is characterized in that a formula comprises the following raw materials in percentage by weight: 1 class G cement in basic unit as well as 50% of ganister sand, 5% of silica fume, 4% of compound retarder, 1% of borax, 40% of water, 4% of sulfonated tannin and 0.08% of n-octyl alcohol which are in 1 basic unit of the class G cement in percentage by weight. According to the deep continental scientific drilling high-temperature resistant cementing material, in order to enable the continental scientific drilling construction to be carried out smoothly and the cementing quality to meet the standard, appropriate initial consistency in high temperature and pressure is developed, favorable flowability, stability and thickening time and less water loss are achieved, and a cement calculus body with higher strength is provided, so that the performance requirement of the cementing material and the cement calculus body after condensation in high temperature and pressure is satisfied.
Description
Technical field
The present invention relates to the high temperature resistant well cementing material of a kind of deep Continental Science Drilling, is that a kind of being used in continent, the deep probing HTHP ultra deep well supported and the protective casing well cementing material, belongs to the method for cementing the well in the Science Drilling drilling process of deep, continent.
Background technology
Continental Science Drilling is to obtain deep Earth material, understanding earth interior information method the most directly, the most effectively and the most reliably; " going up to the sky, go into ground, plunge into the commercial sea " is the grand engineering of human challenge nature, and Continental Science Drilling is guide's engineering that China plans with going into.Along with social economy is fast-developing for a long time, China faces problems such as the resource that becomes increasingly conspicuous, the energy, environment, is badly in need of the development deep to survey and correlation technique, and the science and technology support of necessity is provided for deep mineral resource assessment and disaster reduction and prevention.The development that the high temperature resistant well cementing material of Continental Science Drilling is surveyed in the deep is the integral part that China's earth's crust is surveyed engineering, and the quality of well cementing material is directly connected to deep Science Drilling cementing quality, is related to wellbore construction efficient and the life-span that becomes well.The research purpose of high temperature resistant well cementing material is to the deep probing provides safe and reliable well cementing material, thereby serves the enforcement of the whole continent Science Drilling plan.
Continental Science Drilling usually runs in drilling process like the HTHP problem at present; Leakage, well slough, undergauge problem; Supporting sleeve also prevents that underground fluid from corroding telescopic; Influence is normally crept into, when serious even challenge such as cause that well is scrapped.
The main drawback that existing well cementing material exists is (220 ℃ of static state under the condition of high temperature; 260 ℃ of dynamic temperatures), the well cementing material thickening time is short, has satisfied not arts demand; And the well cementing material strength retrogression is serious under the HTHP situation, has satisfied not the requirement of Science Drilling cementing quality.
Summary of the invention
The object of the present invention is to provide the high temperature resistant well cementing material of a kind of deep Continental Science Drilling, it can carry out in order to make the Continental Science Drilling construction smoothly, and cementing quality reaches standard, develops under HTHP, to have suitable initial consistency; Good flowability, stability and thickening time; Less WL; The well cementing material of higher consolidating strength makes well cementing material and the calculus body of the back formation of condensing satisfies performance requriements under the HTHP situation.
Technical scheme of the present invention is achieved in that the high temperature resistant well cementing material of a kind of deep Continental Science Drilling; It is characterized in that filling a prescription and form by following raw material by weight percentage: G class g cement, silica flour, SILICA FUME, composite retardant, borax, water, sulfonation tannin, n-Octanol; Wherein the G class g cement is a fundamental unit 1 by weight percentage; Following material rate is a by mass of cement per-cent, silica flour 50%, SILICA FUME 5%, composite retardant 4%, borax 1%, water 40%, sulfonation tannin 4%, n-Octanol 0.08%.
Positively effect of the present invention is that the well cementing material thickening time is long, good rheological property, and the thickening time can be adjusted as the case may be; WL is less, condensate rate is few; Consolidating strength is high; It is high temperature resistant, high voltage bearing performance index:
(1) density: 1.86 g/cm
3
(2) thickening time: 252min (220 ℃);
(3) WL: 32mL/30min (220 ℃);
(4) the bleed rate 1.20%;
(5) 14 days ultimate compression strength: 25.6Mpa (260 ℃); Can promotion and application in Continental Science Drilling.
Embodiment
Below in conjunction with embodiment the present invention is done further description:
Embodiment
Get G level oil well cement, silica flour, SILICA FUME, composite retardant, borax, water, sulfonation tannin, n-Octanol raw material; Earlier in the high-speed stirring jar, add entry; Add 3 minutes (following each material all stirred 3 minutes) of composite retardant stirring successively, the stirring of adding cement, adding silica flour and SILICA FUME stirring, the stirring of adding borax, the stirring of adding sulfonation tannin, the stirring of adding n-Octanol get final product.Wherein the G class g cement is a fundamental unit 1 by weight percentage, and following material rate is a by mass of cement per-cent, silica flour 50%, SILICA FUME 5%, composite retardant 4%, borax 1%, water 40%, sulfonation tannin 4%, n-Octanol 0.08%.
G level oil well cement is a kind of basic cement in the API standard oil well cement; Its clinker mineral composition and ordinary Portland cement are roughly the same; But because the requirement of aspects such as the oil well cement cementing operation is mobile to grout in order to satisfy, multiviscosisty and cement strength, thereby require aspects such as its granularity, proportioning and oxide content thereof that special control is arranged in component particles.The massfraction of each composition of the other G level of api class oil well cement is generally: C3S (50%), C2S (30%), C3A (5%), C4AF (12%).
Silicon powder is commonly called as silica flour, is by natural quartz (SiO
2) or the micro mist that processes of fused quartz.Through a certain amount of silica flour of admixture, reduce the C/S of raw mix, can change formed cement stone ore thing, to reach the purpose that prevents that hot strength from degrading.
The SILICA FUME staple is an amorphous silicon di-oxide, little silicon with contain Ca (OH)
2Will the absorb water gluey silicic acid of a kind of viscosity of generation of water contact, silicic acid and calcium hydroxide reaction generate hydraulic calcium silicate hydrate C-S-H (B) at last.Unreacted little silicon grain gathering is filled in cement hole hole, the free water in the constraint cement hole.Therefore optional little silicon is as the stablizer that reduces free water.Add the bleed that silicon in a subtle way can reduce grout effectively, improve the stability of slurry.
Composite high temperature retarder is used to improve the multiviscosisty performance and the flowing property of grout under the HTHP.The characteristics of deep detecting shaft are HTHPs, therefore postpone well cementing material set time and satisfy instillation process technical requirements etc., need grout to keep pumpability over a period to come.
Borax is that a kind of high temperature helps retardant in grout, and self delayed coagulation is also not obvious, thus generally do not use separately, usually through being used the TR that improves retardant with other admixtures.
The intensity of the dosage of water and cement calculus body has much relations.Water-solid ratio is bigger, and the degree of compactness after the hardening of cement is just little, and hole then the more the shrinkage phenomenon of absolute volume can take place, and intensity is also influenced.Adopt less water-solid ratio as far as possible,, reduce the cement shrinkage phenomenon, improve cement strength to reduce the free water content in the cement stone.
Sulphur methyl tannin (code name SMT) popular name sulfonation tannin is a kind of novel thinner of modification, in grout, is used as thinner; The sulfonation tannin is under hot conditions; Can control the viscosity shear force of grout effectively, make the initial consistency of grout significantly reduce, obtain drag-reduction effect preferably.
N-Octanol has defoaming effect preferably in well cementing material.
High temperature resistant well cementing material performance evaluation mainly is that thickening time (static 220 ℃ are equivalent to 260 ℃ of dynamic temperatures), the WL (220 ℃) of grout, the bleed rate of grout, these five indexs of cement stone ultimate compression strength (260 ℃) from cement slurry density, grout are estimated.
Cement slurry density: this prescription cement slurry density is at 1.80～1.90 g/cm
3Between.Cement slurry density is mainly used in equilibrium pressure in the cementing operation.
The thickening time of grout: accomplish in order to make well cementation everything goes well with your work; Must control whole well cementation process accomplished in the thickening time; And need to consider SF, also should reserve the above safe construction time of 1h, so the thickening time of grout is extremely important to well cementation work.
The WL of grout: what that free water in the grout is infiltrated to the stratum through the borehole wall are the cement slurry water loss amount be meant, a large amount of dehydrations of grout will cause the rapid retrogradation of grout, influence its flowability greatly, thereby are unfavorable for well cementation everything goes well with your work carrying out.The cement slurry water loss amount is more little in principle good more, but the admixture of control cement slurry water loss is influential to the rheological of grout, thickening time, ultimate compression strength etc. usually, therefore should weigh consideration.
The bleed rate of grout: the grout condensate rate is excessive bad with sedimentation stability, will cause the cement slurry density skewness, and formed cement strength is inconsistent, influences cementing quality.
Cement stone ultimate compression strength: the cement consolidating strength requires to support the sleeve pipe in the well, can sustain the shock load when creeping into.
Claims (1)
1. high temperature resistant well cementing material of deep Continental Science Drilling; It is characterized in that filling a prescription and form by following raw material by weight percentage: G class g cement, silica flour, SILICA FUME, composite retardant, borax, water, sulfonation tannin, n-Octanol; Wherein the G class g cement is a fundamental unit 1 by weight percentage; Following material rate is a by mass of cement per-cent, silica flour 50%, SILICA FUME 5%, composite retardant 4%, borax 1%, water 40%, sulfonation tannin 4%, n-Octanol 0.08%.
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| CN201210373350.3A CN102838973B (en) | 2012-09-27 | 2012-09-27 | Deep continental scientific drilling high-temperature resistant cementing material |
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| CN102838973B CN102838973B (en) | 2014-08-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995687A (en) * | 2016-01-26 | 2017-08-01 | 中国石油化工集团公司 | A kind of hot dry rock high temperature cementing slurry and preparation method thereof |
| CN107902933A (en) * | 2017-11-24 | 2018-04-13 | 成都博世威科技有限公司 | A kind of oil-well cement high temperature resistance decline extra material and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226531A (en) * | 1998-01-20 | 1999-08-25 | 株式会社日本触媒 | Cement additive and cement composition using same |
| CN1900210A (en) * | 2006-07-24 | 2007-01-24 | 大庆石油管理局 | High temperature high density isolation liquid |
| CN101747009A (en) * | 2009-12-04 | 2010-06-23 | 四川嘉华企业（集团）股份有限公司 | High-temperature low-density cement and applications thereof |
-
2012
- 2012-09-27 CN CN201210373350.3A patent/CN102838973B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1226531A (en) * | 1998-01-20 | 1999-08-25 | 株式会社日本触媒 | Cement additive and cement composition using same |
| CN1900210A (en) * | 2006-07-24 | 2007-01-24 | 大庆石油管理局 | High temperature high density isolation liquid |
| CN101747009A (en) * | 2009-12-04 | 2010-06-23 | 四川嘉华企业（集团）股份有限公司 | High-temperature low-density cement and applications thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995687A (en) * | 2016-01-26 | 2017-08-01 | 中国石油化工集团公司 | A kind of hot dry rock high temperature cementing slurry and preparation method thereof |
| CN107902933A (en) * | 2017-11-24 | 2018-04-13 | 成都博世威科技有限公司 | A kind of oil-well cement high temperature resistance decline extra material and preparation method thereof |
| CN107902933B (en) * | 2017-11-24 | 2021-06-22 | 四川盛年同缔实业有限公司 | High-temperature-fading-resistant admixture for oil well cement and preparation method thereof |
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| CN102838973B (en) | 2014-08-06 |
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