Effects of Physical Properties of SiO2 Crystalline State on Mechanical Properties of High Temperature Set Cement
-
摘要: 油井水泥石高温力学性能衰退会对深层油气井安全性及服役寿命造成很大影响。研究水泥石高温强度衰退规律将有助于改善水泥石的长期高温力学性能。硅溶出是造成水泥石高温力学性能衰退的主要原因之一,但未引起重视。重点研究了温度对不同晶态硅溶解度的影响,并结合高温加砂水泥石抗压强度进行分析。结果表明,硅溶解度随温度上升而增加,相同温度下非晶硅的溶解度远大于晶体硅;随硅溶解度的增大,水化前期的硅溶解促进水泥石早期高温抗压强度发展,高温反应后期水化产物会发生硅溶出,造成水泥石高温强度衰退;静态水中水泥石高温抗压强度比动态水中更高且更加稳定;养护环境中硅饱和程度高,水泥石的高温力学性能更稳定。从高温硅溶出角度分析,以晶体硅为主,少量非晶硅为辅的不同晶态硅将有助于保持水泥石高温力学性能稳定。Abstract: The decline of the high temperature mechanical properties of set cement in oil wells has significant influences on the safety of deep reservoirs and the life span of the wells. Studies on the decline patterns of set cement’s high temperature strengths help to improve the long-term high temperature mechanical properties of the set cement. Silica leaching, one of the important factors leading to the decline of cement’s high temperature mechanical properties, has not yet been taken seriously. In this study, the effects of temperature on the solubility of different crystalline silicas have been investigated, and the compressive strength of the set cement with sand at elevated temperatures analyzed. It was proved that the solubility of silica increases with increase in temperature, and the solubility of non-crystalline silica is much larger than the solubility of crystalline silica. With the increase in the solubility of silica, the dissolution of silica in the early stage of hydration promotes the development of the early-stage high temperature compressive strength of the set cement. In the late stage of the high temperature reaction, silica leaching takes place in the hydration products, resulting in decline of the high temperature strength of the set cement. The high temperature compressive strength of set cement in static water is higher and more stable than the high temperature compressive strength of set cement in dynamic water. A high silica saturation in a curing environment helps make the high temperature mechanical properties of set cement more stable. Based on the analysis of silica leaching at high temperatures, it was found that treatment of cement slurries with sand comprising mainly crystalline silica and minor content of non-crystalline silica help improve the stability of high temperature mechanical properties of the set cement.
-
[1] RODERICK B PERNITES, ASHOK K SANTRA. Portland cement solutions for ultra-high temperature wellbore applications[J]. Cement and Concrete Composites, 2016,(72):89-103. [2] MAHADEVAN, THIRUVILLA S, DU JINCHENG. Hydration and reaction mechanisms on sodium silicate glass surfaces from molecular dynamics simulations with reactive force fields[J]. Journal of the American Ceramic Society, 2020, 103(6):3676-3690. [3] SKIBSTED, SNELLINGS. Reactivity of supplementary cementitious materials(SCMs)in cement blends[J]. Cement and Concrete Research, 2019, 124:1-16. [4] GUO SHUAICHENG, DAI QINGLI, CHANG LIANG, et al. Kinetic analysis and thermodynamic simulation of alkali-silica reaction in cementitious materials[J]. Journal of the American Ceramic Society, 2018, 102(3):1463-1478. [5] 姚晓, 葛荘, 汪晓静, 等. 加砂油井水泥石高温力学性能衰退机制研究进展[J]. 石油钻探技术, 2018, 46(1):17-23.YAO Xiao, GE Zhuang, WANG Xiaojing, et al. Research progress of degradation of mechanical properties of sand-containing cement in high temperature regimes[J]. Petroleum Drilling Techniques, 2018, 46(1):17-23. [6] CUI CHONG, ZHAO QINYI. Morphology and porosity of the insoluble matter produced by activated xonotlite[EB/OL].Beijing:Sciencepaper Online[2017-03-29].http://www.paper.edu.cn/releasepaper/content/201703-380. [7] FARSHADRAJABIPOUR, ERIC GIANNINI, CYRILLE DUNANT, et al. Alkali-silica reaction:Current understanding of the reaction mechanisms and the knowledge gaps[J]. Cement and Concrete Research, 2015, 76:130-146. [8] FOURNIER R O, POTTER R W. An equation correlating the solubility of quartz in water from 25℃ to 900℃ at pressure up to 10000 bar[J].Geochim Cosmochim, 1982, 46(10):1969-1973. [9] KENNEDY G C. A portion of the system silica-water[J]. Econ Geol, 1950, 45(7):629-665. [10] MARSHALL W L. Amorphous silica solubilities-I. Behavior in aqueous sodium nitratesolutions; 25-300℃,0-6 molar[J]. Geochimica Cosmochimicaacta, 1980, 44(7):907-913. [11] CHEN C A, MARSHALL W. Amorphous silica solubilities IV. Behavior in pure water and aqueous sodium chloride, sodium sulfate, magnesium chloride, and magnesium sulfate solutions up to 350℃[J]. Geochimica et Cosmochimica, 1982, 46(2):279-287. [12] LUKE. Phase studies of pozzolanic stabilized calcium silicate hydrates at 180℃[J]. Cement and Concrete Research, 2004, 34(9):1725-1732. [13] 张鑫, 魏浩光, 刘健, 等. 180℃液硅防气窜剂粒径优化及性能研究[J]. 钻井液与完井液, 2020, 37(1):97-102.ZHANG Xin, WEI Haoguang, LIU Jian, DING Shidong, et al. Study on particle size optimization and performance of a silica water suspension as anti gas channeling agent at 180℃[J]. Drilling Fluid & Completion Fluid, 2020, 37(1):97-102. [14] SHEN Peiliang, LU Linnu, HE Yongjia, et al. The effect of curing regimes on the mechanical properties, nano-mechanical properties and microstructure of ultrahigh performance concrete[J]. Cement and Concrete Research, 2019, 118:1-13. [15] BRUNO, GULLYTY, JUILO, et al. Silica content influence on cement compressive strength in wells subjected to steam injection[J]. Journal of Petroleum Science and Engineering, 2017, 158:626-633. [16] HE YONGJIA, RUITAO M, LU LINNU, et al. Hydration products of cement-silica fume-quartz powder mixture under different curing regimes[J]. Journal of Wuhan University of Technology(Materials ence), 2017, 32(3):598-602. [17] 姜洪义, 陈小佳. 不同硅质材料对水热合成硬硅钙石的影响[J]. 硅酸盐通报, 2008, 27(1):188-190.JIANG Hongyi, CHEN Xiaojia. Hydrothermal synthesis of xonotlite by different silicon material[J]. Bulletin of The Chinese Ceramic Society, 2008, 27(1):188-190. [18] 魏浩光, 张鑫, 丁士东, 等. PEG对纳米硅水泥浆触变性改善的研究[J]. 钻井液与完井液, 2018, 35(4):82-86.WEI Haoguang, ZHANG xin, DING Shidong, et al. Rheological improvement of nano-phase silicon cement slurry with polyglycol[J].Drilling Fluid & Completion Fluid, 2018, 35(4):82-86. [19] 熊俊杰, 李春, 杨生文, 等. 硼修饰纳米二氧化硅交联剂研发及性能评价[J]. 钻井液与完井液,2019,36(2):245-249.XIONG Junjie, LI Chun, YANG Shengwen,et al. Development and performance evaluation of a boronmodified nanosilica crosslinking agent[J].Drilling Fluid & Completion Fluid, 2019, 36(2):245-249. [20] CH NOIK. Oilwell cement durability[R]. SPE 56538, 1999. [21] EILERS L H, NELSON E B, MORAN L K. Hightemperature cement compositions-pectolite, scawtite, truscottite, or xonotlite:which do you want?[J]. Journal of Petroleum Technology, 1983, 35(7):1373-1377. [22] 格鲁特FF. 岩石手册[M]. 张瑞锡, 汪正然, 译. 上海:上海科学技术出版社, 1959:44-60, 121-164, 179-190. GROUT F F. Rock hand book[M]. ZHANG Ruixi, WANG Zhengran, translated. Shanghai:Shanghai Scientific & Technical Publishers, 1959:44-60, 121-164, 179-190. [23] BRANDL A, BRAY W S, DOHERTY D R. Technically and economically improved cementing system with sustainable components[R]. SPE 136276, 2010. [24] EILERS. Long-term effects of high temperature on strength retrogression of cements[R]. SPE 5871, 1976. [25] D STILES. Effects of long-term exposure to ultrahigh temperature on the mechanical parameters of cement[R]. IADC/SPE 98896, 2006. [26] ZEESHAN, MOBEEN, MOHAMED.Effects of nanoclay and silica flour on the mechanicalproperties of class g cement[J]. Asc Omega, 2020, 5(20):11643-11654. [27] BLACK L, GARBEV K, STUMM A. Structure, bonding and morphology of hydrothermally synthesized xonotlite[J]. Advances in Applied Ceramics, 2009, 108(3):137-144. [28] NICHOLA J COLEMAN, DAVID S BRASSINGTON. Synthesis of Al-substituted 11Å tobermorite from newsprint recycling residue:a feasibility study[J]. Materials Research Bulletin, 2003, 38(3):485-497. [29] KRAKOWIAK, THOMAS, MUSSO, et al. Nanochemo-mechanical signature of conventional oil-well cement systems:Effect of elevated temperature and curing time[J]. Cement and Concrete Research, 2015, 67:103-121.
点击查看大图
计量
- 文章访问数: 576
- HTML全文浏览量: 170
- PDF下载量: 49
- 被引次数: 0