CN102040987B - 230 DEG C resistance retarder for oil-well cement and preparation method thereof - Google Patents
230 DEG C resistance retarder for oil-well cement and preparation method thereof Download PDFInfo
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- CN102040987B CN102040987B CN 201010570966 CN201010570966A CN102040987B CN 102040987 B CN102040987 B CN 102040987B CN 201010570966 CN201010570966 CN 201010570966 CN 201010570966 A CN201010570966 A CN 201010570966A CN 102040987 B CN102040987 B CN 102040987B
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Abstract
The invention provides a retarder for oil-well cement with 230 DEG C resistance. The retarder is prepared from the following raw materials in parts by weight: 170-180 parts of 2-acrylamide-2-methylpropanesulfonic acid, 60-70 parts of acrylic triformic acid, 1.0-1.5 parts of azodiisobutyronitrile imidazoline hydrochloride, 280-300 parts of deionized water and 260-270 parts of 30% (w/w) NaOH. By utilizing the retarder, the well cementing cost of a deep well can be reduced, the benefit for exploiting deep oil gas resources is guaranteed, the thickening time of deep well cement paste is controled, and the construction safety of the well cementing is guaranteed.
Description
Technical field
The present invention relates to oil drilling field cementing extra-agent, especially a kind of anti-230 ℃ of oil well cements retardant and preparation method thereof.
Background technology
Retardant is extremely important admixture in the hot hole cementing operation, is used for guaranteeing grout in the pumpability of cementing operation process, guarantees that cement can reach the design level position smoothly.At present, also do not have and at the oil well cement retarder of 230 ℃ of uses, to have limited the work of exploration and development of China's ultra deep well.
Summary of the invention
In order to solve the problem that exists in the background technology, the invention provides a kind of anti-230 ℃ of oil well cements retardant and preparation method thereof, this retardant can be suitable for 230 ℃ of superelevation hot-wells, reduce the deep well cementing cost, guarantee to exploit the benefit of deep layer hydrocarbon resources, the thickening time of control phreatic water mud, guarantee cementing operation safety.
The technical solution used in the present invention is: these anti-230 ℃ of oil well cement retarders are made by following raw materials according, each raw material by weight ratio: 170～180 parts of 2-acrylamide-2-methylpro panesulfonic acids, 60～70 parts of aconitic acids; 1.0～1.5 parts of azo two isobutyl imidazoline salt hydrochlorates; 280～300 parts of deionized waters, 30%(W/W) NaOH is 260～270 parts.
The preparation method of described anti-230 ℃ of oil well cement retarders, the method comprises the following steps: to add 283.7 parts of deionized waters in stirring tank, add 172.4 parts of 2-acrylamido-2-novalgins, 67.6 parts of aconitic acids, open cooling water circulation stirring, slowly drip 266.3 parts of 30%NaOH, 15～30 ℃ of control temperature, with 5.0 parts of deionized water rinsing hoppers, add in the stirring tank, passed into nitrogen one hour, be warming up to 60 degree, with 1.2 parts of azos of 5.0 parts of deionized water dissolvings, two isobutyl imidazoline salt hydrochlorates, drop in the reactor, keep 60 degree reactions namely to get this retardant in 8 hours.
Utilization of the present invention contains the polymkeric substance of carboxyl, plays delayed coagulation by adsorption and sequestering action.Three aspect effects are roughly arranged: the one, because the absorption of multipolymer, make the normal hydrated state of cement particle surface be interfered (distortion), the generation of calcium hydroxide and nucleus were grown when inhibition or part had suppressed hydrated cementitious, and the aquation of cement is prolonged inductive phase, reached the slow setting purpose; The 2nd, because multipolymer adsorbs at cement particle surface, form diffusion double layer, make cement particle surface charged, suppressed intergranular coalescent, reach the purpose of slow setting; The 3rd, owing to containing more carboxyl in the copolymer molecule, have stronger metal-chelating ability, produce stable water-soluble ring texture by reaction and sequestering action, the parcel cement granules stops or delays the further aquation of cement, prolongation cement slurry thickening time.The preferentially adsorbed of multipolymer energy suppresses its nucleation and growth in tricalcium aluminate, shows very strong delayed coagulation, and tricalcium silicate and Dicalcium Phosphate (Feed Grade) are then shown weak adsorptive power, thereby has guaranteed the growth of cement later strength.In case intensity is arranged, its intensity is grown very fast, can satisfy the needs of later stage cementing operation, shortens construction cycle.
In the such scheme because the large percentage that accounts in polymkeric substance of AMPS play skeleton function, and this skeleton can not be degraded under high temperature, high pressure, shear conditions, good thermal stability, thus improved the temperature resistance ability of retardant integral body.What the retardant molecular weight was done in addition is generally larger, general hundreds of thousands of all, at normal temperatures, molecular structure is in rolled state, and a large amount of slow setting groups are coated, and under the effect of high temperature, coiled structure will spread apart, the slow setting group is constantly discharged, thereby controlled the speed of hydrated cementitious under the high temperature, the downward modulation purpose of water saving livering time reaches a high temperature.
The present invention has this retardant of following beneficial effect: a. and can be suitable for 230 ℃ of superelevation hot-well b. thickening times and retardant dosage Relations Among and substantially be linear.C. the compatibleness that contains the water retaining of carboxylic monomer and this retardant is good.D. this retardant also has some improvement to the interface splicing to the ultimate compression strength effect of being significantly improved of Behavior of Hardened Cement Paste, can consider this respect impact when formulating of recipe.
Embodiment:
The invention will be further described below in conjunction with embodiment:
The preparation method of anti-230 ℃ of oil well cement retarders of the present invention comprises the following steps: to add the 283.7Kg deionized water in stirring tank, add 172.4Kg2-acrylamido-2-novalgin (AMPS), aconitic acid (AA) 67.6Kg, open cooling water circulation stirring, slowly drip 30%NaOH 266.3Kg, 15～30 ℃ of control temperature.With 5.0Kg deionized water rinsing hopper, add in the stirring tank.Pass into nitrogen one hour, and be warming up to 60 degree, with 5.0Kg deionized water dissolving 1.2Kg azo two isobutyl imidazoline salt hydrochlorates (VA044), drop in the reactor, keep 60 degree reactions 8 hours, namely get retardant of the present invention.Can add as the case may be water and dilute for easy to use.
The prepared retardant molecular formula of the present invention is as follows:
The prepared retardant detected result of the present invention is as follows: a. outward appearance is white powder, and dry one hour weightlessness of 75 degree is less than 8%; B. gel chromatography detects: Dalton molecular weight distributes less than four; C.FTIR detects: 3420cm
-1The N-H stretching vibration among the AMPS is embodied at the place, and 2940,2970cm
-1Carboxylic acid C-H stretching vibration peak, 1730cm embody in the place
-1The place shows carboxylic acid C=O stretching vibration peak, 1550cm
-1The place shows the C-H of methyl to flexural vibration, 1180cm
-1The place shows the stretching vibration of carboxylic acid C-O, 1040cm
-1S=O stretching vibration, 627cm embody in the place
-1The place shows the S-O stretching vibration.Simultaneously, at 1635～1620cm
-1The place is without the charateristic avsorption band of the two keys of C=C.D. use oil well cement G level to carry out thickening time test, 230 ℃ of test temperatures, 150MPa.Water cement ratio 0.60, dosage are pressed 2% of cement weight, and the thickening time reaches 260 minutes/100Bc.
Retardant to gained of the present invention is tested: experimental result adopts " oil well cement additive evaluation method SY/T 5504-2005 " standard to detect:
Testing apparatus: the U.S. thousand De Le instrument companies 3170 types watt woods agitator; The U.S. thousand De Le instrument companies 8240 type High Temperature High Pressure multiviscosity meters.
Testing program: 230 ℃ of test temperatures, pressure 150Mpa.
A. 600g cement+240g quartz sand (200 order)+12g retardant+348g water
260 minutes thickening times.
B. 600g cement+240g quartz sand (200 order)+18g retardant+342g water
330 minutes thickening times.
Experimental result show the present invention reached can rig-site utilization condition.
Claims (2)
1. anti-230 ℃ of oil well cement retardant, this retardant is made by following raw materials according, each raw material by weight ratio: 170～180 parts of 2-acrylamide-2-methylpro panesulfonic acids, 60～70 parts of aconitic acids; 1.0～1.5 parts of azo two isobutyl imidazoline salt hydrochlorates; 280～300 parts of deionized waters, 30%(W/W) NaOH is 260～270 parts.
2. anti-230 ℃ of oil well cements claimed in claim 1 are with the preparation method of retardant, the method comprises the following steps: to add 283.7 parts of deionized waters in stirring tank, add 172.4 parts of 2-acrylamido-2-novalgins, 67.6 parts of aconitic acids, open cooling water circulation stirring, slowly drip 266.3 parts of 30%NaOH, 15～30 ℃ of control temperature, with 5.0 parts of deionized water rinsing hoppers, add in the stirring tank, passed into nitrogen one hour, be warming up to 60 degree, with 1.2 parts of azos of 5.0 parts of deionized water dissolvings, two isobutyl imidazoline salt hydrochlorates, drop in the reactor, keep 60 degree reactions namely to get this retardant in 8 hours.
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| CN 201010570966 CN102040987B (en) | 2010-12-03 | 2010-12-03 | 230 DEG C resistance retarder for oil-well cement and preparation method thereof |
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| CN 201010570966 CN102040987B (en) | 2010-12-03 | 2010-12-03 | 230 DEG C resistance retarder for oil-well cement and preparation method thereof |
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| CN102040987A CN102040987A (en) | 2011-05-04 |
| CN102040987B true CN102040987B (en) | 2013-04-24 |
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| DE102008030712A1 (en) * | 2008-06-27 | 2009-12-31 | Construction Research & Technology Gmbh | Time-delayed superabsorbent polymers |
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Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Street No. 263 Patentee after: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Street No. 263 Patentee before: DA QING PETROLEUM ADMINISTRATION BUREAU |
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Effective date of registration: 20220107 Address after: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Plains Road No. 99 Patentee after: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. Patentee after: CHINA NATIONAL PETROLEUM Corp. Address before: 163453 Heilongjiang Province, Daqing City Ranghulu District Central Street No. 263 Patentee before: DAQING PETROLEUM ADMINISTRATION Co.,Ltd. |
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