CN101864285B - Deepwater cementing low-temperature early strength agent - Google Patents
Deepwater cementing low-temperature early strength agent Download PDFInfo
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- CN101864285B CN101864285B CN 201010200729 CN201010200729A CN101864285B CN 101864285 B CN101864285 B CN 101864285B CN 201010200729 CN201010200729 CN 201010200729 CN 201010200729 A CN201010200729 A CN 201010200729A CN 101864285 B CN101864285 B CN 101864285B
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Abstract
The invention relates to a deepwater cementing low-temperature early strength agent. The low-temperature early strength agent comprises the following components in percentage by weight: 33 to 66 percent of alkali metal bromides, 6 to 16 percent of sodium metaaluminate, 15 to 35 percent of alkali metal hydroxides, 8 to 15 percent of silicon dioxide and 0.8 to 1.5 percent of alcamines organics, wherein the alkali metal bromides are a mixture of one, two or more of NaBr, KBr and LiBr; the alkali metal hydroxides are NaOH, KOH or a mixture of the NaOH and KOH; and the alcamines organics are triethanolamine, triisopropanolamine or a mixture of the triethanolamine and triisopropanolamine. The deepwater cementing low-temperature early strength agent has small influence on rheological behaviour of cement paste at low temperature, can prompt the cement paste to be solidified rapidly at low temperature and reach higher early strength, shortens the thickening time of the cement paste at lower temperature and can well meet the requirements of the cementing construction of a surface casing under the conditions of low temperature, shallow gas and the like.
Description
Affiliated technical field
The present invention relates to a kind of deep water cementing low-temperature early strength agent, belong to the oil gas well cementing operation technical field.
Background technology
The exploratory development of ballow hydrocarbon resources is limited by abominable complex environment and storage characteristics, has " four height " characteristics, i.e. new and high technology, excessive risk, high skill people, high repayment.Can and can a bite well exploit the time of decades safely, economically, and the test that withstand Oil/gas Well well stimulation, perforation, exploitation and every workover treatment in process of production, and this is often closely related with the quality of well cementation.For the difficulty that deep-water exploration faces, often high especially to the deep water cementing specification of quality.Deep water cementing is compared with conventional cementing, and particularly top layer section well cementation often is faced with the unfavorable factors such as low temperature, weak formation, shallow seated groundwater air-flow.
The water-soluble class hardening accelerator of deepwater well cementing mortar exists hydration heat large mainly take muriate as main at present, the side effects such as corrosion sleeve pipe and cement; But not can only there be certain application limitation in water-soluble class hardening accelerator for the well site that dry mixing device is arranged again, and responsive to temperature, can only be suitable for single temperature condition.
Therefore, developing a kind of novel low-temperature early strength agent prevents the annular space channelling and improves cementing quality, not only be domestic deep water hydrocarbon well, and be the support that provides the necessary technical of the well cementation operating mode under the cold condition in the shallow gas etc., have great importance in the exploitation of low temperature hydrocarbon-bearing pool.
Summary of the invention
The object of the present invention is to provide deepwater cementing low-temperature early strength agent, this low-temperature early strength agent can shorten the thickening time of grout under cold condition, improve the early anti pressured intension of Behavior of Hardened Cement Paste, can be used under the cold condition being particularly suitable for cold condition Ocean deep water cementing aspect in the hydrocarbon-bearing pool well cementation.
For reaching above technical purpose, the invention provides following technical scheme.
Deepwater cementing low-temperature early strength agent, every kind of component and content are as follows:
Alkali metal bromide: 33～66 % by weight;
Sodium metaaluminate: 6～16 % by weight;
Alkali metal hydroxide: 15～35 % by weight;
Silicon-dioxide: 8～15 % by weight;
Alcamines organism: 0.8～1.5 % by weight.
Described alkali metal bromide is a kind of, two or more mixture among NaBr, KBr, the LiBr; Described alkali metal hydroxide is NaOH, KOH or its mixture; Silicon-dioxide is nano level.
Described alcamines organism is trolamine, tri-isopropanolamine or its mixture.
Above material is commercially available.
The preparation method of low-temperature early strength agent composition of the present invention is as follows: alkali metal bromide, sodium metaaluminate, alkali metal hydroxide, silicon-dioxide and alcamines organism are weighed up according to the above ratio; Above-mentioned substance added to mix in the mixing machine successively get final product.
Alkali metal bromide among the present invention and alcamines organism can generate complex compound with cement colloid mineral generation chemical action, have accelerated the hydrated cementitious process and have promoted the development of Behavior of Hardened Cement Paste early strength.Take the alcamines organism as example, it contains not share electron pair, thereby it is easy to dative bond with other ion, and especially some metal ions form complex ions, thereby are good complexing agents.It is easily and the Al in the cement particle surface hydration product in basic solution
3+, Fe
3+Plasma generates water-soluble coordination compound, therefore, accelerates C in the G class g cement at the solvable point of cement particle Surface Creation
3A, C
2A and C
4The AF dissolution rate, and accelerate with the reaction of gypsum, calcium sulphoaluminate (ettringite AFt) growing amount increases; thereupon like this will be before the grout sclerosis, basically finish volumetric expansion, thereby can improve compactness and the ultimate compression strength thereof of Behavior of Hardened Cement Paste, especially improve early strength.In addition, the adding of the alkali metal hydroxide among the present invention makes Ca in the liquid phase (OH)
2The steady degree of supersaturation that is situated between improves, and can more effectively stop C
3The A aquation initial stage forms the trend of loose crystallization, thereby improves compactness and the intensity of Behavior of Hardened Cement Paste.Sodium metaaluminate among the present invention, its main component is meta-aluminate, its Main Function is the alkalescence that provides effective component with lime for the formation of ettringite AFt and strengthened solution, simultaneously, their thermopositive reaction at the beginning of Jia Shui have improved liquidus temperature, are conducive to promote formation and the slurry strength development of hydrated product.The Main Function of the silicon-dioxide among the present invention is the space between the filling concrete particle, and then improves the compactness of Behavior of Hardened Cement Paste.
Compared with prior art, low-temperature early strength agent of the present invention has following beneficial effect: (1) rheology impact to grout under cold condition is very little.(2) impel grout rapid solidification under cold condition, and reach higher early strength.(3) thickening time of grout under the shortening cold condition.Therefore can satisfy well the surface string needs of cementing operations in the situations such as low temperature, shallow gas.
Description of drawings
Fig. 1 is the low-temperature early strength agent of the present invention that adds 3 % by weight in the good magnificent G level oil well cement, presses water cement ratio 0.44, and the grout of preparing is at 30 ℃, the multiviscosisty graphic representation under the 20MPa condition.
Fig. 2 is the low-temperature early strength agent of the present invention that adds 3 % by weight in the good magnificent G level oil well cement, presses water cement ratio 0.44, and the grout of preparing is at 30 ℃, the ultimate compression strength progress curve figure under the 14MPa condition.
Embodiment
In embodiments of the present invention, specialize such as nothing, per-cent all is weight percentage.
Embodiment 1:
35% Potassium Bromide, 15% sodium metaaluminate, 35% potassium hydroxide, 14% silicon-dioxide, 1% alcamines organism are weighed up according to the above ratio; Potassium Bromide, sodium metaaluminate, potassium hydroxide, silicon-dioxide, the alcamines organism that weighs up added in the mixing machine successively mix, namely get low-temperature early strength agent of the present invention " ZQ-1 ".
Embodiment 2:
30% Sodium Bromide, 30% Potassium Bromide, 7% sodium metaaluminate, 24% sodium hydroxide, 8% silicon-dioxide, 1% alcamines organism are weighed up according to the above ratio; Sodium Bromide, Potassium Bromide, sodium metaaluminate, sodium hydroxide, silicon-dioxide, the alcamines organism that weighs up added in the mixing machine successively mix, namely get low-temperature early strength agent of the present invention " ZQ-2 ".
Embodiment 3:
53% Sodium Bromide, 12% sodium metaaluminate, 15% sodium hydroxide, 9.2% silicon-dioxide, 0.8% alcamines organism are weighed up according to the above ratio; Sodium Bromide, sodium metaaluminate, sodium hydroxide, silicon-dioxide, the alcamines organism that weighs up added in the mixing machine successively mix, namely get low-temperature early strength agent of the present invention " ZQ-3 ".
Embodiment 4: powerful morning of low-temperature early strength agent " ZQ-2 "
Good magnificent G level oil well cement is selected in experiment, and water cement ratio is 0.44 neat slurry.The ultimate compression strength experiment utilizes atmospheric low-temperature water-bath maintenance test.Under different dosages, differing temps, the different curing time condition low-temperature early strength agent on good magnificent G class g cement ultimate compression strength to affect situation as shown in table 1.
By the result as can be known, under the atmospheric low-temperature condition, low-temperature early strength agent has significant early stage enhancement to the conventional density neat slurry, and temperature is lower and curing time is shorter, and it is higher that Behavior of Hardened Cement Paste ultimate compression strength increases degree.
Table 1 hardening accelerator is on the impact of Behavior of Hardened Cement Paste ultimate compression strength
Embodiment 5: low-temperature early strength agent " ZQ-2 " is to grout multiviscosisty performance impact
Good magnificent G level oil well cement is selected in experiment, and water cement ratio is 0.44 neat slurry.Measure the thickening time of grout under the differing temps.The result is as shown in table 2.As can be seen from the table, the thickening time of grout under the cold condition can be obviously shortened in the strong agent of low temperature among the present invention, and also significantly shortening of the multiviscosisty of grout " transit time ", show certain " near right angle multiviscosisty " characteristic, have good anti-channeling.
Table 2 hardening accelerator is on the impact of grout multiviscosisty performance
Embodiment 6: low-temperature early strength agent " ZQ-2 " is to mortar architecture performance impact commonly used
Low-temperature early strength agent among the present invention will successfully be promoted in the Oil/gas Well cementing job as a kind of new oil well cement additive, not only will satisfy the low-temperature high-early strength characteristic, requires simultaneously to have good compatibleness with other oil well cement additive commonly used.
Be the adaptability of low-temperature early strength agent among check the present invention, its impact on multiple mortar architecture over-all properties commonly used of experimental analysis.Table 3 and table 4 be respectively low-temperature early strength agent " ZQ-2 " on the situation that affects of the performance of LT-1A mortar architecture, JS-2 mortar architecture, comprise the performances such as fluid loss, free water, thickening time and ultimate compression strength.The curing condition of ultimate compression strength experiment wherein: maintenance in the normal pressure water-bath; The experimental pressure of thickening time is 7～15MPa.
Table 3 hardening accelerator is on the impact of LT-1A mortar architecture salient features
Table 4 hardening accelerator is on the impact of JS-2 mortar architecture salient features
Analyze from table and find out, the low-temperature early strength agent among the present invention all has significant early stage enhancement to these mortar architectures, and the over-all properties Harmony of system is good, and the thickening time is easy to regulation and control, and stability, rheological and dehydration etc. are all had no adverse effects.This research experiment has also been investigated this low-temperature early strength agent to the early stage enhancement effect of other mortar architecture commonly used (comprising LT-2 mortar architecture, HS-2A mortar architecture and latex LATEX2000 mortar architecture etc.) and the situation that affects of Other Engineering performance.Experimental result shows that the admixture of low-temperature early strength agent of the present invention and these mortar architectures has good compatibleness.
Embodiment 7: multiviscosisty performance and the Compressive Strength Analysis of low-temperature early strength agent " ZQ-2 "
Fig. 1 is " ZQ-2 " low-temperature early strength agent of adding 3% in the good magnificent G level oil well cement, press water cement ratio 0.44, the grout of preparing is at 30 ℃, the multiviscosisty graphic representation under the 20MPa condition, can obviously be found out by figure: the thickening time is 150min, and multiviscosisty transit time is 13min.Curve is " near right angle multiviscosisty ", and the explanation system has good anti-channeling.
Fig. 2 is " ZQ-2 " low-temperature early strength agent of adding 3% in the good magnificent G level oil well cement, press water cement ratio 0.44, the grout of preparing is at 30 ℃, use the ultimate compression strength progress curve figure of ultrasonic investigation under the 14MPa condition, can be drawn by map analysis: in G class g cement magma, add " ZQ-2 " low-temperature early strength agent, system 6h ultimate compression strength has improved 239.52% just up to 0.842MPa than G level magma ultimate compression strength under the same terms.It can be confirmed: the ZQ-A low-temperature early strength agent has good early strength function to G level oil well cement.
Claims (3)
1. deepwater cementing low-temperature early strength agent, every kind of component and content are as follows:
Alkali metal bromide: 33～66 % by weight;
Sodium metaaluminate: 6～16 % by weight;
Alkali metal hydroxide: 15～35 % by weight;
Silicon-dioxide: 8～15 % by weight;
Alcamines organism: 0.8～1.5 % by weight;
Described alkali metal bromide is a kind of, two or more mixture among NaBr, KBr, the LiBr, and described alkali metal hydroxide is NaOH, KOH or its mixture, and described alcamines organism is trolamine, tri-isopropanolamine or its mixture.
2. low-temperature early strength agent as claimed in claim 1 is characterized in that, its component and ratio are as follows: Potassium Bromide 35 % by weight, sodium metaaluminate 15 % by weight, potassium hydroxide 35 % by weight, silica 14 % by weight, trolamine or tri-isopropanolamine 1 % by weight.
3. low-temperature early strength agent as claimed in claim 1, it is characterized in that its component and ratio are as follows: Sodium Bromide 30 % by weight, Potassium Bromide 30 % by weight, sodium metaaluminate 7 % by weight, sodium hydroxide 24 % by weight, silicon-dioxide 8 % by weight, trolamine or tri-isopropanolamine 1 % by weight.
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| CN102531443B (en) * | 2010-12-13 | 2013-09-25 | 中联煤层气有限责任公司 | Early strength agent composition and preparation method thereof, cement composition and uses of above |
| CN102126840B (en) * | 2011-03-02 | 2012-07-25 | 陈子川 | Low-temperature concrete early strength agent |
| CN104031624B (en) * | 2014-06-20 | 2016-08-24 | 西南石油大学 | A kind of preparation method of low-density cement mortar early strength agent |
| CN104194752B (en) * | 2014-08-01 | 2016-11-23 | 中国石油天然气集团公司 | Coal bed gas well well cementation low-temperature early strength agent and containing its cement paste for well cementation |
| CN105462571B (en) * | 2015-11-16 | 2018-06-29 | 中国石油大学(华东) | A kind of low temperature well cementing mortar architecture and composition |
| CN105347716B (en) * | 2015-11-24 | 2017-07-07 | 中国石油大学(华东) | A kind of cement mortar of decentralized without fluorocarbon oil well cement low-temperature early strength agent and comprising it |
| CN106365569B (en) * | 2016-08-26 | 2018-08-31 | 北京建工新型建材有限责任公司 | A kind of high underwater masonry mortar of disturbance |
| CN106348690B (en) * | 2016-08-26 | 2019-10-11 | 北京建工新型建材有限责任公司 | A kind of underwater acidic environment masonry mortar |
| CN106365499B (en) * | 2016-08-26 | 2018-08-31 | 北京建工新型建材有限责任公司 | Masonry mortar special additive under a kind of high-performance water |
| CN106380135B (en) * | 2016-08-26 | 2018-12-14 | 北京建工新型建材有限责任公司 | A kind of underwater alkaline environment masonry mortar |
| CN106542757A (en) * | 2016-10-25 | 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 alcamines reinforcing agent and preparation method and applications |
| CN106830744B (en) * | 2017-01-06 | 2019-03-12 | 中国海洋石油集团有限公司 | A kind of well cementation early strength agent and preparation method thereof |
| CN108178597A (en) * | 2017-12-18 | 2018-06-19 | 固岩科技发展有限公司 | A kind of method of early-strong-fast-hard type cementitious material consolidated fill metal mine |
| CN109777375A (en) * | 2019-04-01 | 2019-05-21 | 安徽陆海石油助剂科技有限公司 | A kind of viscosity depressant for drilling fluid and its production method |
| CN111116082A (en) * | 2020-02-27 | 2020-05-08 | 河海大学 | MXene modified concrete early strength agent and preparation method thereof |
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| CN100595174C (en) * | 2008-03-14 | 2010-03-24 | 北京化工大学 | Use method with calcium-aluminum hydrotalcite as concrete early strength agent |
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