低水化热水泥浆用微胶囊型热控材料制备及应用
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摘要
基于天然气水合物低温、高压及电解质条件下的分解特性,以常规波特兰油井水泥为基料,外掺入微胶囊型热控材料(PCM-1),制备了一种低水化热水泥浆体系。采用自研半绝热测试实验设备对水泥浆体系早期水化过程中的温度进行了连续测量,以水泥浆体系最高温度(T_m)及最大水化温升(Tr)表征了PCM-1对水泥浆体系水化热的控制效应。结果表明,PCM-1的含量15%时(以水泥的质量为基准,下同),该水泥浆较纯水泥浆的水化最高温度下降了22.3℃,最大水化温升下降了23.6℃;24 h及48 h水化热分别下降了7.68×10~4 J及7.28×10~4 J。微胶囊能够有效地控制水泥浆的水化温升及水化热,大幅降低了深水水合物层的固井风险。
Based on the decomposition characteristics of natural gas hydrate underlow temperature, high pressure and electrolyte conditions, a cement slurry system of low-hydration heat was developed with Portland oil well cement as base material and addition of micro-capsule type thermal control material(PCM-1). The temperature in the early hydration process of the cement slurry system was continuously measured by self-developed semi-adiabatic test equipment, and the control effect of PCM-1 on hydration heat was characterized by maximum temperature(T_m) and maximum hydration temperature rise(Tr) of the cement slurry system. The results showed that compared with that of pure slurry cement system, when addition amount of PCM-1 was 15%(taking the quality of cement as the benchmark, the same below), the hydration maximum temperature of the prepared cement slurry system decreased by 22.3 ℃ and the maximum hydration temperature rise decreased by 23.6 ℃. In addition, 24 h and 48 h hydration heat respectively decreased by 7.68′10~4 J and 7.28′10~4 J. Microcapsule can effectively control the hydration temperature rise and hydration heat of cement slurry, and greatly reduce the cementing risk of the hydrate layer in deep water.
Based on the decomposition characteristics of natural gas hydrate underlow temperature, high pressure and electrolyte conditions, a cement slurry system of low-hydration heat was developed with Portland oil well cement as base material and addition of micro-capsule type thermal control material(PCM-1). The temperature in the early hydration process of the cement slurry system was continuously measured by self-developed semi-adiabatic test equipment, and the control effect of PCM-1 on hydration heat was characterized by maximum temperature(T_m) and maximum hydration temperature rise(Tr) of the cement slurry system. The results showed that compared with that of pure slurry cement system, when addition amount of PCM-1 was 15%(taking the quality of cement as the benchmark, the same below), the hydration maximum temperature of the prepared cement slurry system decreased by 22.3 ℃ and the maximum hydration temperature rise decreased by 23.6 ℃. In addition, 24 h and 48 h hydration heat respectively decreased by 7.68′10~4 J and 7.28′10~4 J. Microcapsule can effectively control the hydration temperature rise and hydration heat of cement slurry, and greatly reduce the cementing risk of the hydrate layer in deep water.
引文
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[2]Sun Y,LüX,Guo W.A review on simulation models for exploration and exploitation of natural gas hydrate[J].Arabian Journal of Geosciences,2014,7(6):2199-2214.
[3]Jr S E.Fundamental principles and applications of natural gas hydrates[J].Nature,2003,426(6964):353-363.
[4]HuoJ H,Peng Z G,Ye Z B,et al.Preparation,characterization and investigation of lowhydration heat cement slurry system used in natural gas hydrate formation[J].Journal of Petroleum Science&Engineering,2018,170(6):81-88.
[5]Wu Zhiqiang(武治强),Xu Mingbiao(许明标),Wang Xiaoliang(王晓亮),et al.Study on the performance of an effective flushing fluid system for inhibiting gas hydrate decomposition[J].Journal of Yangtze University(长江大学学报),2018,15(7):65-68.
[6]Collett T S,Lee M W,Agena W F,et al.Permafrost-associated natural gas hydrate occurrences on the Alaska North Slope[J].Marine and Petroleum Geology,2011,28(2):279-294.
[7]Wang Z Y,Sun B J,Wang X R,et al.Prediction of natural gas hydrate formation region in wellbore during deep-water gas well testing[J].Journal of Hydrodynamics,2014,26(4):568-576.
[8]Wang Ruihe(王瑞和),Qi Zhigang(齐志刚),Bu Yuhuan(步玉环),et al.Low temperature and low hydration thermal cementing cement system:CN101328050[P].2008-12-24.
[9]Huang Shouguo(黄守国).Study of low thermal cementing slurry suitable for deep water drilling[D].Jingzhou:Yangtze University(长江大学),2012.
[10]Xu Mingbiao(许明标).Study on cementing low hot water slurry in gas hydrate layer[J].Journal of Oil and Gas Technology(石油天然气学报),2014,36(11):134-137.
[11]Chong Z R,Yang S H B,Babu P,et al.Review of natural gas hydrates as an energy resource:Prospects and challenges[J].Applied Energy,2015,162(1):1633-1652.
[12]Yuan Yanping(袁艳平),Xiang Bo(向波),Cao Xiaoling(曹晓玲).Research status and development on latent energy storage technology of building[J].Journal of Southwest Jiaotong University(西南交通大学学报),2016,51(3):585-598.
[13]Wu Z G,Zhao C Y.Experimental investigations of porous materials in high temperature thermal energy storage systems[J].Solar Energy,2011,85(7):1371-1380.
[14]Huang J,Wang T,Zhu P,et al.Preparation,characterization,and thermal properties of the microencapsulation of a hydrated salt as phase change energy storage materials[J].Thermochimica Acta,2013,557:1-6.
[15]Xu Jianming(许建明),Liu Zuliang(刘祖亮),Di Dandan(翟丹丹).Modification of inorganic salts by encapsulation method[J].Liaoning Chemical Industry(辽宁化工),2003,32(4):142-143.
[16]Wu Wei(毋伟),Jia Mengqiu(贾梦秋),Chen Jianfeng(陈建峰).Effect of silane coupling agent on the preparation and application of nano-silicon dioxide composte material by sol-gel method[J].Acta Materiae Compositae Sinica(复合材料学报),2004,21(2):70-75.
[17]Huo J H,Peng Z G,Feng Q,et al.Controlling the heat evaluation of cement slurry system used in natural gas hydrate layer by micro-encapsulated phase change materials[J].Solar Energy,2018,169:84-93.
[18]Li Haiyan(李海燕).Resarch on surface modification of PUFmicrocapsules and self-healing performance for epoxy[D].Harbin:Harbin Institute of Technology(哈尔滨工业大学),2010.
[19]Sánchezsilva L,Tsavalas J,Sundberg D,et al.Synthesis and Characterization of paraffin wax microcapsules with acrylic-based polymer shells[J].Industrial&Engineering Chemistry Research,2010,49(23):12204-12211.
[20]Radlinski M,Olek J.Investigation into the synergistic effects in ternary cementitious systems containing portland cement,fly ash and silica fume[J].Cement and Concrete Composites,2012,34(4):451-459.
[21]Goldman A,Bentur A.The influence of microfillers on enhancement of concrete strength[J].Cement&Concrete Research,1993,23(4):962-972.
[22]Xiao Q,Rao P,Xiao W,et al.Preparation of a novel forpolymer as fluid loss additive for high temperature oil well cementing[J].Russian Journal of Applied Chemistry,2014,87(9):1377-1381.