Cementing Slurry Technology for Ultra-deep and High-pressure Gas Storage
-
摘要: 随着塔里木油田储气库井向超深高压方向发展,固井工程面临埋藏深、井底温度高、顶替效率低、气窜风险高、交变载荷作用下水泥环易失效等难题,普通的水泥浆难以满足该条件下的固井要求。通过实验优选了三种核心材料:增韧剂BCE-X、自愈合剂BCY-Y和低黏降失水剂BCF-Z,从紧密堆积理论、水灰比调控、顶替效率优化等机理方面探索了提高韧性水泥强度机制,形成了一套适用于超深高压储气库固井的高强度韧性自愈合水泥浆体系,并优化了固井顶替工艺。结果表明,高强度韧性自愈合水泥浆体系密度范围为1.86~1.92 g/cm3,稠化时间可调,API 失水量≤ 50 mL,沉降密度差为0,游离液为0,7 d 弹性模量小于6.0 GPa,90 ℃、7 d抗压强度大于30 MPa。该技术成功应用于塔里木油田牙哈储气库YC-H11井三开尾管固井,全井段固井质量合格率为99.7%、优质率为85.9%,盖层段连续优质水泥环长达25 m以上。结论认为,该技术通过力学性能优化与顶替效率提升的协同作用,显著提升了超深高压储气库固井的长期密封完整性,为同类储气库高效建设提供了可靠技术支撑。Abstract: With the drilling of gas storage wells in the Tarim basin towards ultra-deep high-pressure formations, well cementing engineering is confronted with multiple challenges, including deeper well drilling, high bottomhole temperature, low displacement efficiency, high risk of gas channeling, and easy failure of cement sheath under alternating loads. Conventional cement slurries can hardly satisfy the requirements of well cementing under such conditions. To deal with these challenges, a high strength tough self-healing cement slurry system suitable for cementing ultra-deep high-pressure gas-storage wells was developed with three core materials optimally selected through a large number of experiments, which are toughening agent BCE-X, self-healing agent BCY-Y and low viscosity filter loss reducer BCF-Z. In the development of the cement slurry system, the mechanisms of improving the strength of a tough cement slurry were investigated from close-packing theory, water/cement ratio control and displacement efficiency optimization, with the cement displacement process also optimized. The results of the research show that the high strength tough self-healing cement slurry system has a density range of 1.86-1.92 g/cm3, an adjustable thickening time, an API filter loss ≤ 50 mL, a settlement density difference of 0, a free water of 0, a 7-d elastic modulus < 6.0 GPa, and a 7-d compressive strength at90 ℃>30 MPa. This technology has been successfully applied in cementing the liner of the third-interval in the gas-storage well YC-H11 in the block Yaha in the Tarim oilfield. The percent qualified cementing job of the whole well is 99.7%, the rate of excellent job quality reaches 85.9%, and the continuous high-quality cement sheath in the cap rock section is longer than 25 m. It is concluded that through the synergistic effect of mechanical performance optimization and displacement efficiency enhancement, this technology significantly improves the long-term sealing integrity of ultra-deep high-pressure gas storage wells, providing reliable technical support for efficient construction of similar gas storage wells.
-
Key words:
- Gas storage /
- Malleable cement slurry /
- Ultra-deep well /
- Self-healing cement slurry /
- Seal integrity /
- High-pressure
-
表 1 加入BCE-X的韧性水泥石力学性能与行业标准对比
对比项 ρ/
g·cm−3p24 h/
MPap7 d/
MPa7 d抗拉强度/
MPa7 d弹性模量/
GPa7 d气体渗透率/
mD7 d线性膨胀率/
%SY/T 7648-2021要求 1.90 ≥16.0 ≥28.0 ≥1.9 ≤6.0 ≤0.05 0~0.2 BCE-X韧性水泥石 1.90 27.5 35.0 2.5 5.5 0.015 0.1 注:水泥石养护条件为90 ℃×20.7 MPa。 表 2 BCY-Y在甲烷中的自愈合性能
裂缝
类型裂缝等效
宽度/μmKa/mD 渗透率
降低率/%初期 终期 人工劈开 133 98.6 21.3 77.9 人工劈开 99.5 40.1 4.9 84.5 微裂缝 22.7 4.566 0.015 99.7 注: 实验温度为70 ℃,气体为高纯甲烷。 表 3 BCF-Z 与普通降失水剂 A 的水泥浆流变性能对比
ρ/
g·cm−34.5%降失
水剂FL/
mL流动度/
cm流变性能 n K/Pa·sn 常规
(1.90 )A 44 19 0.67 0.76 BCF-Z 40 22 0.88 0.33 表 4 BCE-X与BCY-Y不同加量下水泥石的力学性能及水泥浆流变性能对比
配方 BCE-X/
%BCY-Y/
%p24 h/
MPap7 d/
MPa7 d抗拉强度/
MPa7 d弹性模量/
GPan K/
Pa·sn1# 0 0 33.7 41.5 3.1 8.25 0.92 0.35 2# 3 3 30.6 38.9 2.8 6.46 0.90 0.39 3# 3 5 29.5 36.2 2.7 6.21 0.89 0.40 4# 5 3 28.3 35.1 2.6 5.83 0.88 0.41 5# 5 5 26.9 34.0 2.5 5.65 0.87 0.42 6# 3 8 24.7 31.5 2.4 5.51 0.85 0.46 7# 8 3 22.5 28.6 2.3 5.37 0.84 0.47 8# 5 8 21.3 27.4 2.2 5.40 0.82 0.52 9# 8 5 19.8 26.3 2.1 5.21 0.81 0.53 10# 8 8 17.6 23.8 2.0 5.12 0.79 0.60 注:水泥浆基浆配方:天山G级水泥+35%硅粉+增韧剂BCE-X+自愈合剂BCY-Y+4.5%降失水剂BCF-Z+2.5%减阻剂BCD-211L+1.5%缓凝剂BCR-320L+0.5%悬浮剂BCJ-300S+0.5%消泡剂BCX-100L+0.5%抑泡剂D50+水,水泥石养护条件为108 ℃×20.7 MPa。 表 5 4#配方不同硅粉掺量下水泥石的抗压强度及水泥浆流变性能对比
配方 200目硅粉/
%500目硅粉/
%微硅/
%p24 h/
MPap7 d/
MPap28 d/
MPan K/
Pa·sn4#-1 35 26.7 32.1 36.7 0.92 0.39 4#-2 35 27.5 32.9 37.2 0.82 0.53 4#-3 30 5 27.7 33.6 38.0 0.90 0.41 4#-4 25 10 28.3 34.1 38.6 0.85 0.48 4#-5 30 5 3 31.5 36.7 41.5 0.88 0.44 4#-6 30 5 5 33.6 37.2 42.1 0.86 0.49 4#-7 30 8 28.5 33.6 38.2 0.83 0.51 表 6 不同种类降失水剂的水泥石抗压强度对比
降失水剂 减阻剂 水灰比 p7 d/MPa p28 d/MPa 普通型 BCD-211L 0.41 32.5 38.9 BCF-Z BCD-211L 0.36 38.3 45.6 注:水泥浆密度为1.90 g/cm³,水泥石养护条件为90 ℃×20.7 MPa。 表 7 高强度韧性自愈合水泥浆体系的性能
ρ/
g·cm−3t稠化/
min△ρ/
g·cm−3流动度/
cm游离液/
%FL/
mL1.86 242 0 22 0 46 1.88 235 0 22 0 44 1.90 227 0 21 0 44 1.92 220 0 21 0 42 注:实验条件为110 ℃×65 MPa×50 min。 表 8 高强度韧性自愈合与常规水泥石的力学性能
水泥石 围压/
MPa峰值强
度/MPa峰值
应变/%弹性模
量/GPa常规 0.1 32.8 2.31 8.36 高强度韧性自愈合 0.1 42.3 3.15 6.65 高强度韧性自愈合 20.0 46.8 3.31 5.93 注:水泥石养护条件为90 ℃×20.7 MPa×7 d。 表 9 YC-H11井韧性自愈合水泥浆关键性能指标
浆体
类型ρ/
g·cm−3t稠化/
mint过渡/
min起强度
时间/min△ρ/
g·cm−3游离液/
%FL/
mLp/
MPap7 d/
MPa7 d抗拉强度/
MPa7 d弹性模量/
GPa领浆 1.90 396 0.01 0 38 27.5(48 h) 30.2 2.5 5.76 尾浆 1.90 157 12 261 0.01 0 36 29.1(24 h) 35.3 2.6 5.85 表 10 不同浆体的流变性能
T/
℃流体
类型φ600 φ300 φ200 φ100 φ6 φ3 n K/
Pa·sn93 钻井液 56 30 21 13 2 1 0.89 0.06 108
↓
93隔离液 60 34 26 15 3 2 0.81 0.11 领浆 >300 221 156 82 7 4 0.89 0.43 尾浆 >300 231 166 90 8 5 0.85 0.59 表 11 YC-H11井固井质量评价表
统计数据 总长
度/m合格
长度/m优秀
长度/m合格率/
%优质率/
%一界面 773.7 772.2 666.2 99.8 86.1 二界面 773.7 770.6 662.3 99.6 85.6 综合固井 773.7 771.4 664.2 99.7 85.9 -
[1] 宋文杰, 江同文, 冯积累, 等. 塔里木盆地牙哈凝析气田地质特征与开发机理研究[J]. 地质科学, 2005, 40(2): 274-283.SONG Wenjie, JIANG Tongwen, FENG Jilei, et al. Geological features and exploitation mechanism of the Yaha condensate gas field in the Tarim basin[J]. Chinese Journal of Geology, 2005, 40(2): 274-283. [2] 倪华峰. 陕224区块储气库水平井钻完井关键技术优化[J]. 石油钻采工艺, 2023, 45(1): 31-37.NI Huafeng. Optimization on key technologies for drilling and completion of horizontal wells in gas storage in Shan 224 block[J]. Oil Drilling & Production Technology, 2023, 45(1): 31-37. [3] 初永涛, 刘奎, 蒋新立, 等. 循环载荷对高温环境水泥石微观结构及力学性能的影响[J]. 石油钻探技术, 2025, 53(4): 55-64.CHU Yongtao, LIU Kui, JIANG Xinli, et al. Effect of cyclic loading on mechanical properties and microstructure of cement stone in high-temperature environments[J]. Petroleum Drilling Techniques, 2025, 53(4): 55-64. [4] 郑睿, 张峥, 李渊, 等. 四川盆地复杂深层天然气井固井密封完整性控制技术[J]. 西部探矿工程, 2025, 37(4): 58-61.ZHENG Rui, ZHANG Zheng, LI Yuan, et al. Cementing sealing integrity control technology for complex deep natural gas wells in Sichuan basin[J]. West-China Exploration Engineering, 2025, 37(4): 58-61. [5] 田磊聚, 朱海金, 卢海川, 等. 改善固井水泥石力学性能的研究进展[J]. 钻井液与完井液, 2024, 41(6): 695-708.TIAN Leiju, ZHU Haijin, LU Haichuan, et al. Progress in studying on improving mechanical property of set cement in well cementing[J]. Drilling Fluid & Completion Fluid, 2024, 41(6): 695-708. [6] 杜晓雨, 王学海, 贾彦龙, 等. 东胜页岩气超长水平段水平井固井关键技术[J]. 石油机械, 2023, 51(4): 46-53.DU Xiaoyu, WANG Xuehai, JIA Yanlong, et al. Key technologies for cementing of shale gas well with ultra-long horizontal section in Dongsheng block[J]. China Petroleum Machinery, 2023, 51(4): 46-53. [7] 凌伟汉. 稠油热采井固井耐高温弹性增韧剂的性能研究[J]. 石油化工应用, 2023, 42(8): 29-32, 37.LING Weihan. Study on the performance of high temperature resistant elastic toughening agent for cementing heavy oil thermal recovery wells[J]. Petrochemical Industry Application, 2023, 42(8): 29-32,37. [8] 于永金, 张航, 夏修建, 等. 超高温固井水泥浆降失水剂的合成与性能[J]. 钻井液与完井液, 2022, 39(3): 352-358.YU Yongjin, ZHANG Hang, XIA Xiujian, et al. Synthesis and study of an ultra-high temperature filtrate reducer for cement slurries[J]. Drilling Fluid & Completion Fluid, 2022, 39(3): 352-358. [9] 王静. 水泥自修复技术在固井中应用研究进展[J]. 石油化工应用, 2024, 43(10): 1-3, 22.WANG Jing. Research progress on the application of cement self-healing technology in cementing[J]. Petrochemical Industry Application, 2024, 43(10): 1-3,22. [10] 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. [11] 方仲旗, 谭元铭, 严俊涛, 等. 基于水泥石拉伸试验的储气库水泥浆体系优选[J]. 钻采工艺, 2023, 46(3): 128-134.FANG Zhongqi, TAN Yuanming, YAN Juntao, et al. Optimization of cement slurry system for gas storage based on the stretching tensile strength[J]. Drilling & Production Technology, 2023, 46(3): 128-134. [12] 张戈. 油井水泥降失水材料性能评价及控滤失机理[D]. 青岛: 中国石油大学(华东), 2022.ZHANG Ge. Performance evaluation and working mechanism of oil well cement fluid loss control materials[D]. Qingdao: China University of Petroleum(East China), 2022. [13] 徐小峰, 宋巍, 杨燕, 等. 页岩储层水平井固井水泥浆体系应用研究进展[J]. 科学技术与工程, 2023, 23(17): 7161-7173.XU Xiaofeng, SONG Wei, YANG Yan, et al. Review of application of cement slurry system for horizontal well in shale reservoir[J]. Science Technology and Engineering, 2023, 23(17): 7161-7173. [14] 张福铭, 肖伟, 朱思佳, 等. 超高温高密度防腐防窜水泥浆[J]. 钻井液与完井液, 2024, 41(4): 506-514.ZHANG Fuming, XIAO Wei, ZHU Sijia, et al. An Ultra-High temperature high density corrosion inhibitive anti-channeling cement slurry[J]. Drilling Fluid & Completion Fluid, 2024, 41(4): 506-514. [15] 杨川, 曹乔黎, 王志刚, 等. 变排量注替防漏固井技术在KS区块储层的应用[J]. 石油化工应用, 2024, 43(5): 28-32, 42.YANG Chuan, CAO Qiaoli, WANG Zhigang, et al. Application of variable displacement injection and leakage prevention cementing technology in KS block reservoir[J]. Petrochemical Industry Application, 2024, 43(5): 28-32,42. [16] 侯海欧. 抗高温高密度固井水泥浆体系研究[J]. 石油化工应用, 2022, 41(7): 60-62, 71.HOU Haiou. Study on high temperature resistant and high density cementing slurry system[J]. Petrochemical Industry Application, 2022, 41(7): 60-62,71. [17] 郝锋, 李基伟, 唐登宇, 等. 海上CCS井固井关键技术探讨[J]. 当代石油石化, 2023, 31(6): 33-38.HAO Feng, LI Jiwei, TANG Dengyu, et al. Discussion on key cementing technology of offshore CCS well[J]. Petroleum & Petrochemical Today, 2023, 31(6): 33-38. [18] 吴华, 刘连恺, 王磊, 等. GY5-1-4H页岩油水平井提高固井质量关键技术研究与实践[J]. 钻探工程, 2023, 50(4): 135-141.WU Hua, LIU Liankai, WANG Lei, et al. Study and application of key technology enhancement of shale oil horizontal well cementing quality for Well GY5-1-4H[J]. Drilling Engineering, 2023, 50(4): 135-141. [19] 闫睿昶, 徐明, 虞海法, 等. 巴彦河套盆地复杂储层固井技术[J]. 钻井液与完井液, 2023, 40(1): 82-88.YAN Ruichang, XU Ming, YU Haifa, et al. Well cementing technology for complex reservoirs in the Bayan Hetao basin[J]. Drilling Fluid & Completion Fluid, 2023, 40(1): 82-88. [20] 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. [21] 齐奔, 马如然, 段云刚, 等. 油基钻井液用温敏型冲洗液[J]. 油田化学, 2025, 42(3): 381-387.QI Ben, MA Ruran, DUAN Yungang, et al. Thermosensitive flushing fluid for oil-based drilling fluid[J]. Oilfield Chemistry, 2025, 42(3): 381-387. [22] 杨鸿波, 陈国军, 张国光, 等. M油田盐膏层精细动态控压固井技术[J]. 天然气勘探与开发, 2021, 44(4): 72-79.YANG Hongbo, CHEN Guojun, ZHANG Guoguang,et al. Precise dynamic pressure-control cementing and its application to salt-gypsum layers in M oilfield[J]. Natural Gas Exploration and Development, 2021, 44(4): 72-79. [23] 张健楠, 张伟, 雷颖, 等. 储气库生产管柱检测评价融合方法提升油气井注采安全[J]. 石油钻采工艺, 2025, 47(1): 84-92.ZHANG Jiannan, ZHANG Wei, LEI Ying, et al. A combination method for detection and evaluation of production string in gas storage facilities to enhance the safety of injection and production in oil and gas wells[J]. Oil Drilling & Production Technology, 2025, 47(1): 84-92. -
下载: