粉煤灰-微硅-水泥三元复合低密度充填水泥浆在页岩油水平井的应用

摘要/Abstract

摘要： 为提高页岩油水平井上部固井质量,通过浆体稳定性差异反向优化颗粒配比,采用碱石灰和硫酸镁制备新型水化激活剂,结合²⁹Si NMR进行反应程度定量分析,开发了一种粉煤灰-微硅-水泥三元复合低密度充填水泥浆,并开展了五口井的工程试验。结果表明,粉煤灰和微硅的最佳加量分别为40%、35%(质量分数),碱石灰与硫酸镁的配比为3∶1(质量比)时组成的激活剂效果最好,可将油井水泥的反应剩余量降低29.59%,粉煤灰的反应剩余量降低68.61%,常温下3 d、7 d抗压强度分别提升129%和92%,三元复合体系的失水、游离液、稠化时间等均能满足固井充填需求,现场应用表明固井合格井段占比超过90%,体系具有良好的应用前景。

关键词: 页岩油水平井, 粉煤灰, 微硅, 低密度水泥浆, 激活剂, 常温

Abstract: In order to improve the cementing and filling effects of the upper part of shale oil horizontal wells, the settlement stability evaluation method was used to design the particle ratio scheme with equal particle size, which can simulate the actual temperature and pressure conditions underground. And a new hydration activator that is suitable for the normal and low temperature environment was developed with alkali lime and magnesium sulfate. In conclusion, a ternary low density filling cement slurry composed of fly ash, micro silicon, and cement was created by the ²⁹Si NMR quantitative analysis, and it was carried out in 5 shale oil horizontal wells of Yanchang oilfield. The results show that the cement slurry is the most stable when the optimum dosage of fly ash and micro silicon is 40% and 35% (mass fraction), and the activator works best when the mass ratio of alkali lime to magnesium sulfate is 3∶1. All the above reduce the residual amount of cement by 29.59% and fly ash by 68.61%, and increase the 3 d and 7 d compressive strength of low density cement slurry at room temperature by 129% and 92%, respectively. In addition, the water loss, water precipitation and thickening time of the ternary composite system totally meet the needs of cementing and filling. The application of 5 wells shows that the qualified sections account for more than 90%, and the cement slurry has good application prospect and large-scale popularization potential.

Key words: shale oil horizontal well, fly ash, micro silicon, low density cement slurry, activator, room temperature

中图分类号:

TE25

王涛, 侯云翌, 马振锋, 杨先伦, 段玉秀. 粉煤灰-微硅-水泥三元复合低密度充填水泥浆在页岩油水平井的应用[J]. 硅酸盐通报, 2022, 41(4): 1380-1387.

WANG Tao, HOU Yunyi, MA Zhenfeng, YANG Xianlun, DUAN Yuxiu. Application of Fly Ash-Micro Silicon-Cement Ternary Composite Low Density Filling Cement Slurry in Shale Oil Horizontal Wells[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2022, 41(4): 1380-1387.

参考文献

[1] 王倩茹,陶士振,关平.中国陆相盆地页岩油研究及勘探开发进展[J].天然气地球科学,2020,31(3):417-427.
WANG Q R, TAO S Z, GUAN P. Progress in research and exploration & development of shale oil in continental basins in China[J]. Natural Gas Geoscience, 2020, 31(3): 417-427 (in Chinese).
[2] 赵文智,胡素云,侯连华,等.中国陆相页岩油类型、资源潜力及与致密油的边界[J].石油勘探与开发,2020,47(1):1-10.
ZHAO W Z, HU S Y, HOU L H, et al. Types and resource potential of continental shale oil in China and its boundary with tight oil[J]. Petroleum Exploration and Development, 2020, 47(1): 1-10 (in Chinese).
[3] 付金华,李士祥,牛小兵,等.鄂尔多斯盆地三叠系长7段页岩油地质特征与勘探实践[J].石油勘探与开发,2020,47(5):870-883.
FU J H, LI S X, NIU X B, et al. Geological characteristics and exploration of shale oil in Chang 7 Member of Triassic Yanchang Formation, Ordos Basin, NW China[J]. Petroleum Exploration and Development, 2020, 47(5): 870-883 (in Chinese).
[4] 王香增,高潮.鄂尔多斯盆地南部长7陆相泥页岩生烃过程研究[J].非常规油气,2014,1(1):2-11.
WANG X Z, GAO C. The hydrocarbon generation process of the Mesozoic Chang 7 lacustrine shale in south of Ordos Basin[J]. Unconventional Oil & Gas, 2014, 1(1): 2-11 (in Chinese).
[5] 慕立俊,赵振峰,李宪文,等.鄂尔多斯盆地页岩油水平井细切割体积压裂技术[J].石油与天然气地质,2019,40(3):626-635.
MU L J, ZHAO Z F, LI X W, et al. Fracturing technology of stimulated reservoir volume with subdivision cutting for shale oil horizontal wells in Ordos Basin[J]. Oil & Gas Geology, 2019, 40(3): 626-635 (in Chinese).
[6] 齐奉忠,杜建平.哈里伯顿页岩气固井技术及对国内的启示[J].非常规油气,2015,2(5):77-82.
QI F Z, DU J P. Halliburton shale gas well cementing technology and its enlightenment to domestic gas industry[J]. Unconventional Oil & Gas, 2015, 2(5): 77-82 (in Chinese).
[7] 杨先伦,王涛,徐云林,等.一种高强低密度水泥浆体系研发及应用:以延安气田延SS井区为例[J].非常规油气,2019,6(6):110-116.
YANG X L, WANG T, XU Y L, et al. Development and application of an high strength and low density cement slurry system: a case study of SS area of Yanan gas field[J]. Unconventional Oil & Gas, 2019, 6(6): 110-116 (in Chinese).
[8] ADJEI S, ELKATATNY S. Overview of the lightweight oil-well cement mechanical properties for shallow wells[J]. Journal of Petroleum Science and Engineering, 2021, 198: 108201.
[9] 杨广国,穆海鹏,高元,等.活化粉煤灰低密度水泥浆体系研究及应用[J].科学技术与工程,2014,14(17):193-196.
YANG G G, MU H P, GAO Y, et al. Research and application of low-density slurry with activated fly ash[J]. Science Technology and Engineering, 2014, 14(17): 193-196 (in Chinese).
[10] LAM L, WONG Y L, POON C S. Degree of hydration and gel/space ratio of high-volume fly ash/cement systems[J]. Cement and Concrete Research, 2000, 30(5): 747-756.
[11] 李响,阿茹罕,阎培渝.水泥-粉煤灰复合胶凝材料水化程度的研究[J].建筑材料学报,2010,13(5):584-588.
LI X, ARUHAN, YAN P Y. Research on hydration degree of cement-fly ash complex binders[J]. Journal of Building Materials, 2010, 13(5): 584-588 (in Chinese).
[12] 王涛,申峰,马振锋,等.一种评价水泥浆沉降稳定性的新方法:微压力波动测试水泥浆滤失-沉降耦合作用[J].天然气工业,2019,39(8):96-103.
WANG T, SHEN F, MA Z F, et al. A new method for evaluating settlement stability of cement slurry: micro-pressure fluctuation tests for cement slurry filtration-settlement coupling[J]. Natural Gas Industry, 2019, 39(8): 96-103 (in Chinese).
[13] 于小龙,王涛,刘云,等.无氯低温早强剂及其在浅层水平井固井中的应用[J].探矿工程(岩土钻掘工程),2016,43(4):55-58.
YU X L, WANG T, LIU Y, et al. Chloride-free and low temperature early strength agent and the application in cementing of shallow horizontal well[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling), 2016, 43(4): 55-58 (in Chinese).
[14] 管柏伦,郭荣鑫,齐荣庆,等.偏高岭土-粉煤灰基地聚物砂浆力学性能研究[J].硅酸盐通报,2021,40(4):1250-1257.
GUAN B L, GUO R X, QI R Q, et al. Mechanical properties of geopolymer mortar based on metakaolin and fly ash[J]. Bulletin of the Chinese Ceramic Society, 2021, 40(4): 1250-1257 (in Chinese).
[15] 田宝振,覃毅,高飞,等.ZG112深井低密度高强度韧性水泥浆固井技术[J].石油钻采工艺,2019,41(3):288-293.
TIAN B Z, QIN Y, GAO F, et al. The cementing technology of low-density, high-strength tough cement slurry for the deep well ZG112[J]. Oil Drilling & Production Technology, 2019, 41(3): 288-293 (in Chinese).
[16] 张宏军.中空玻璃微球超低密度水泥浆体系评价与应用[J].石油钻采工艺,2011,33(6):41-44.
ZHANG H J. Hollow glass particles super low density slurry evaluation and application[J]. Oil Drilling & Production Technology, 2011, 33(6): 41-44 (in Chinese).
[17] 王涛,吴金桥,李伟,等.高水灰比高掺量粉煤灰环保型低成本固井水泥浆的研制[J].硅酸盐通报,2019,38(7):2260-2267.
WANG T, WU J Q, LI W, et al. Development of environmentally friendly and low cost cement slurry with high water-cement ratio and fly ash content[J]. Bulletin of the Chinese Ceramic Society, 2019, 38(7): 2260-2267 (in Chinese).
[18] ADJEI S, ELKATATNY S, ABDELFATTAH A M. New lightweight cement formulation for shallow oil and gas wells[J]. ACS Omega, 2020, 5(49): 32094-32101.
[19] 丁庆军,韩冀豫,黄修林,等.微珠与硅灰、粉煤灰水化活性的对比研究[J].武汉理工大学学报,2011,33(3):54-57+115.
DING Q J, HAN J Y, HUANG X L, et al. Research on hydration reactivity of microsphere compared with silica fume and fly ash[J]. Journal of Wuhan University of Technology, 2011, 33(3): 54-57+115 (in Chinese).
[20] 李绍彬,潘志华,胡平淳,等.水泥熟料-粉煤灰体系中粉煤灰活性的复合激发研究[J].硅酸盐通报,2011,30(4):854-859.
LI S B, PAN Z H, HU P C, et al. Study on the composite activation of fly ash in cement clinker-fly ash system[J]. Bulletin of the Chinese Ceramic Society, 2011, 30(4): 854-859 (in Chinese).
[21] 张世华.低品位粉煤灰的改性及其对水泥浆体强度和自收缩的影响[J].硅酸盐通报,2018,37(1):210-214.
ZHANG S H. Modification of low grade fly ashes and its effect on the strength and autogenous shrinkage of cement pastes[J]. Bulletin of the Chinese Ceramic Society, 2018, 37(1): 210-214 (in Chinese).
[22] 白轲.浅谈粉煤灰活性激发[J].广东建材,2011,27(8):35-37.
BAI K. Activation of fly ash[J]. Guangdong Building Materials, 2011, 27(8): 35-37 (in Chinese).
[23] 徐鹏飞,孙艳,廖宜顺,等.氢氧化钙对硫铝酸盐水泥-粉煤灰复合胶凝材料的水化影响[J].硅酸盐通报,2017,36(9):2907-2912+2922.
XU P F, SUN Y, LIAO Y S, et al. Influence of calcium hydroxide on the hydration of sulphoaluminate cement-fly ash composite cementitious materials[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(9): 2907-2912+2922 (in Chinese).
[24] 陈若莉.激发剂对粉煤灰活性的激发作用[J].陕西科技大学学报(自然科学版),2010,28(5):76-79.
CHEN R L. Excitation effect of exciting agent on the activity of fly ash[J]. Journal of Shaanxi University of Science & Technology (Natural Science Edition), 2010, 28(5): 76-79 (in Chinese).
[25] 刘宝举,梁慧,杨元霞.碱对水泥-粉煤灰体系中粉煤灰活性的激发作用[J].铁道科学与工程学报,2009,6(5):51-56.
LIU B J, LIANG H, YANG Y X. Alkaline activated fly ash in cement-fly ash system[J]. Journal of Railway Science and Engineering, 2009, 6(5): 51-56 (in Chinese).
[26] 马鹏传,李兴,温振宇,等.粉煤灰的活性激发与机理研究进展[J].无机盐工业,2021,53(10):28-35.
MA P C, LI X, WEN Z Y, et al. Research progress on activation and mechanism of fly ash[J]. Inorganic Chemicals Industry, 2021, 53(10): 28-35 (in Chinese).[27] 肖建敏,范海宏.固体核磁共振技术在水泥及其水化产物研究中的应用[J].材料科学与工程学报,2016,34(1):166-172.
XIAO J M, FAN H H. Application of solid-state nuclear magnetic resonance techniques in research of cement and hydration products[J]. Journal of Materials Science and Engineering, 2016, 34(1): 166-172 (in Chinese).
[28] SEVELSTED T F, HERFORT D, SKIBSTED J. ¹³C chemical shift anisotropies for carbonate ions in cement minerals and the use of ¹³C, ²⁷Al and ²⁹Si MAS NMR in studies of Portland cement including limestone additions[J]. Cement and Concrete Research, 2013, 52: 100-111.
[29] 张燕迟,钱文勋,蔡跃波.激发剂对高掺量粉煤灰早期水化的作用机理[J].武汉理工大学学报,2010,32(7):44-47+76.
ZHANG Y C, QIAN W X, CAI Y B. Effect and mechanism of activator on the hydrating of cement paste with high volumes of fly ash at early age[J]. Journal of Wuhan University of Technology, 2010, 32(7): 44-47+76 (in Chinese).