Formulation and Evaluation of High-Temperature Large Temperature-Difference Low-Density Cement Slurry
-
摘要: 深井超深井固井普遍存在超深、长封固段，部分井段存在低压易漏等复杂工况，水泥浆面临高温、大温差、低密度水泥石强度低发展慢等技术难题，浆体调凝、稳定性、水泥石强度等性能难兼顾。通过研发抗高温悬浮稳定剂、大温差调凝剂等，结合紧密堆积理论优化颗粒级配，构建了密度为1.20～1.55 g/cm3的高温低密度大温差水泥浆体系。实验表明，抗高温悬浮稳定剂疏水缔合作用可在70～160 ℃内减缓溶液黏度的降低；大温差调凝剂通过温敏官能团释放，实现了“顶部弱缓凝、底部强缓凝”；构建的水泥浆体系高温200 ℃养护后，水泥浆游离液为0，沉降稳定性在0.05 g/cm3以内；大温差条件下水泥石顶部低温段48 h强度达3.6 MPa，能够满足套管支撑和确保持续钻进的要求；120～180 ℃下水泥石14 d强度在13 MPa以上，且28 d强度无显著衰退。高温低密度大温差水泥浆体系为解决高温失稳、调凝及低密度水泥浆强度低等问题提供了技术思路，也为低压易漏失深井超深井安全、高质量固井助力。Abstract: Deep and ultra-deep wells generally have ultra-deep and long cementing hole sections, and some of them also have low-pressured and thief zones that make the operation difficult. In cementing these wells, the cement slurries are faced with technical challenges such as high bottomhole temperature, large temperature-difference, and slow strength development of low-density set cement etc., making it difficult to balance the regulation of thickening time, the stability of cement slurry and the strength of set cement. Using a self-developed high-temperature suspension stabilizer and a thickening time regulator for large temperature-difference, a low-density cement slurry for working under high temperature and large temperature-difference was formulated based on close-packing theory to optimize the sizing of the particles. The density of the cement slurry can be adjusted between 1.20 g/cm3 and 1.55 g/cm3. Experimental results show that the hydrophobic association effect of the high-temperature suspension stabilizer slows down the reduction of the solution viscosity between 70 ℃ and 160 ℃. The large-temperature-difference thickening time regulator, by releasing temperature-sensitive functional groups, achieves “weak retarding at the top and strong retarding at the bottom”. The cement slurry formulated, after aging at a high temperature of 200 ℃, have 0 free water and sedimentation stability of less than 0.05 g/cm3. Under large temperature-differences, the low-temperature section of the top set cement has a 48-hour strength of 3.6 MPa, which can meet the requirements of supporting the casing strings and ensuring drilling ahead. At 120 ℃ – 180 ℃, the 14-day strength of the set cement exceeds 13 MPa, with no obvious strength degradation occurred in 28 days. This high-temperature low-density cement slurry for large temperature-difference conditions provides a technical idea for addressing the problems of high-temperature instability, thickening time regulation and low strength of low-density cement slurries. It also provides support to safe and high-quality cementing of low-pressure deep- and ultra-deep- wells with thief zones.
-
Key words:
- Well cementing /
- Cement slurry /
- High-temperature /
- Low-density /
- Large temperature-difference
-
表 1 不同温度下水泥浆稳定性
HE400/
%T/
℃t下灰/
s稳定性/（g·cm−3） 游离液/
mLdm1 dm2 3 160 25 0.04 0.04 0 4 27 0.02 0.04 0 3 200 27 0.08 0.08 0 4 28 0.04 0.05 0 5 32 0.03 0.05 0 注：dm1为高温养护后直拆水泥浆上下密度差；dm2为2 h静置后水泥浆上下密度差。 
下载: 导出CSV
表 2 大温差下常规密度水泥石强度发展情况
调凝
剂/%BHCT/
℃稠化时
间/min24 h
强度/
MPa顶部抗压强度/
MPa顶部
温度/
℃24 h 48 h 72 h 1.5 120 300 33.4 8.4 16.1 30 2.0 135 317 32.4 3.1 13.2 30 3.0 150 348 35.1 2.7 11.4 30 7.8 15.4 2.0 50 15.1 21.4 27.2 70 4.0 180 339 36.7 14.5 19.7 25.1 100 5.0 200 338 37.8 10.8 19.8 100
下载: 导出CSV
表 3 不同密度水泥浆的性能
水泥浆 ρ/
g·cm−3流动度/
cm游离液/
mLFL（180 ℃）/
mL1# 1.20 22.5 0 37.0 2# 1.40 23.0 0 39.0 3# 1.50 21.5 0 31.0 4# 1.55 21.5 0 31.0
下载: 导出CSV
表 4 大温差下低密度水泥石强度发展情况
水泥
浆BHCT/
℃缓凝剂/
%稠化
时间/
min底部抗压
强度/MPa顶部抗压
强度/MPa顶部
温度/
℃2 d 14 d 28 d 2 d 3 d 1# 130 2 332 5.1 13.7 12.4 3.6 13.7 50 2# 120 2 306 12.7 20.7 19.2 3.7 12.3 30 150 3 317 13.4 20.4 18.1 4.6 13.1 50 3# 130 2 357 13.8 21.7 19.7 5.8 13.4 30 150 3 373 16.4 23.1 21.4 6.4 16 60 180 5 427 20.1 26.4 22.8 4.6 13.2 80 4# 160 4 417 20.7 28.3 26.1 7.1 16.2 80 180 5 434 18.6 27.2 24 5.7 14.1 80
下载: 导出CSV
-
[1] 汪海阁, 黄洪春, 毕文欣, 等. 深井超深井油气钻井技术进展与展望[J]. 天然气工业, 2021, 41(8): 163-177.Wang Haige, Huang Hongchun, Bi Wenxin, et al. Deep and ultra-deep oil/gas well drilling technologies: progress and prospect[J]. Natural Gas Industry, 2021, 41(8): 163-177. [2] 杨昆鹏, 李鹏晓, 敖康伟, 等. 富满油田长封固段低摩阻超低密度水泥浆固井技术[J]. 石油钻探技术, 2023, 51(6): 64-70.Yang Kunpeng, Li Pengxiao, Ao Kangwei, et al. Ultra-low density and low-friction cement slurry cementing technologies in long sealing sections of Fuman oilfield[J]. Petroleum Drilling Techniques, 2023, 51(6): 64-70. [3] 朱光有, 曹颖辉, 闫磊, 等. 塔里木盆地8000 m以深超深层海相油气勘探潜力与方向[J]. 天然气地球科学, 2018, 29(6): 755-772.Zhu Guangyou, Cao Yinghui, Yan Lei, et al. Petroleum exploration potential and favorable areas of ultra-deep marine strata deeper than 8000 meters in Tarim basin[J]. Natural Gas Geoscience, 2018, 29(6): 755-772. [4] 刘洪涛, 刘举, 刘会锋, 等. 塔里木盆地超深层油气藏试油与储层改造技术进展及发展方向[J]. 天然气工业, 2020, 40(11): 76-88.Liu Hongtao, Liu Ju, Liu Huifeng, et al. Progress and development direction of production test and reservoir stimulation technologies for ultra-deep oil and gas reservoirs in Tarim basin[J]. Natural Gas Industry, 2020, 40(11): 76-88. [5] 田野, 宋维凯, 侯亚伟, 等. 大温差低密度水泥浆性能研究[J]. 钻井液与完井液, 2021, 38(3): 346-350.Tian Ye, Song Weikai, Hou Yawei, et al. Study on performance of low-density cement slurry at big temperature differences[J]. Drilling Fluid & Completion Fluid, 2021, 38(3): 346-350. [6] 刘鑫. 高温大温差低密度水泥浆体系的室内研究[J]. 西部探矿工程, 2021, 33(11): 65-67.Liu Xin. Laboratory study on High-Temperature low-density cement slurry system with large temperature difference[J]. West-China Exploration Engineering, 2021, 33(11): 65-67. [7] 欧红娟, 李明, 蒙飞, 等. 长封固段大温差固井水泥浆技术研究进展[J]. 硅酸盐通报, 2017, 36(1): 104-109.Ou Hongjuan, Li Ming, Meng Fei, et al. Research progress on key technologies of cementing slurry for long sealing section and large temperature difference[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(1): 104-109. [8] 侯亚伟, 田野, 马春旭, 等. 0.9 g/cm3超低密度水泥浆体系室内研究[J]. 钻井液与完井液, 2021, 38(3): 351-355.Hou Yawei, Tian Ye, Ma Chunxu, et al. Laboratory research on 0.9 g/cm3 ultra-low density cement slurry[J]. Drilling Fluid & Completion Fluid, 2021, 38(3): 351-355. [9] 陈晓华, 狄伟. 针对裂缝性地层的低密度高强度韧性水泥浆体系研究[J]. 钻井液与完井液, 2021, 38(1): 109-115.Chen Xiaohua, Di Wei. Low-density and strength cement slurry for fractured formation[J]. Drilling Fluid & Completion Fluid, 2021, 38(1): 109-115. [10] 初永涛, 刘奎, 肖京男, 等. 龙凤山气田易漏井不承压泡沫水泥浆固井技术[J]. 钻采工艺, 2024, 47(5): 41-47.Chu Yongtao, Liu Kui, Xiao Jingnan, et al. None-pressure-bearing cementing technology of foam cement slurry in loss-prone well, Longfengshan gas field[J]. Drilling & Production Technology, 2024, 47(5): 41-47. [11] 夏修建, 于永金, 陈洲洋, 等. 一种新型超高温固井水泥浆缓凝剂[J]. 天然气工业, 2021, 41(9): 98-104.Xia Xiujian, Yu Yongjin, Chen Zhouyang, et al. A novel retarder for ultra-high temperature cementing slurry[J]. Natural Gas Industry, 2021, 41(9): 98-104. [12] 刘永贵. 含NVP的高温钻井液助剂的合成及在超深井中工程化应用[D]. 哈尔滨: 哈尔滨工业大学, 2018.Liu Yonggui. Synthesis of High-Temperature drilling fluid additive containing NVP and its engineering application in Ultra-Deep wells[D]. Harbin: Harbin Institute of Technology, 2018. [13] 王成文, 王桓, 薛毓铖, 等. 高密度水泥浆高温沉降稳定调控热增黏聚合物研制与性能[J]. 石油学报, 2020, 41(11): 1416-1424.Wang Chengwen, Wang Huan, Xue Yucheng, et al. Development and performance of thermo-viscosifying polymer for high temperature sedimentation control of high density cement slurry[J]. Acta Petrolei Sinica, 2020, 41(11): 1416-1424. [14] 蒋凌飞. 聚羧酸减水剂、调粘剂和成核早强剂的结构与性能研究[D]. 北京: 清华大学, 2017.Jiang Lingfei. Study on the structure-property relationships of polycarboxylate superplasticizer, viscosity modifying agent and nucleation accelerator[D]. Beijing: Tsinghua University, 2017. [15] 刘景丽, 王野, 李淑陶, 等. 高温油井水泥缓凝剂ZH-8的合成及评价[J]. 钻井液与完井液, 2011, 28(3): 53-55.Liu Jingli, Wang Ye, Li Shutao, et al. Synthesis and evaluation of ultra-high temperature retarder ZH-8 for oil well cement[J]. Drilling Fluid & Completion Fluid, 2011, 28(3): 53-55. [16] Quercia G, Brouwers H J H, Garnier A, et al. Influence of olivine nano-silica on hydration and performance of oil-well cement slurries[J]. Materials & Design, 2016, 96: 162-170. [17] 郑少军, 王凯伦, 刘思雨, 等. 基于紧密堆积理论的低密度固井水泥浆设计[J]. 钻探工程, 2021, 48(3): 94-100.Zheng Shaojun, Wang Kailun, Liu Siyu, et al. Design of low density cementing slurry based on close packing theory[J]. Drilling Engineering, 2021, 48(3): 94-100. [18] 程荣超, 王瑞和, 步玉环. 基于分形理论的固井水泥浆体系设计[J]. 西安石油大学学报(自然科学版), 2007, 22(6): 60-63,67.Cheng Rongchao, Wang Ruihe, Bu Yuhuan. Design of well-cementing slurry system based on fractal theory[J]. Journal of Xi'an Shiyou University (Natural Science Edition), 2007, 22(6): 60-63,67. -
点击查看大图
图(13) / 表(4)
计量
- 文章访问数: 19
- HTML全文浏览量: 9
- PDF下载量: 2
- 被引次数: 0
