Normal Spotting and Reverse Squeezing of Low-density Cement Slurries in Wells with Narrow Safe Drilling Windows
-
摘要: 针对西南油气田分公司蓥北1井φ273.05 mm套管固井存在漏层多、分布广,油气显示活跃,低温低密度水泥浆强度低及发展慢等固井难题。开发出了密度为1.23 g/cm3的高强度韧性防窜低密度水泥浆体系,该体系稠化时间可调,静胶凝强度发展快,62℃下440 min即起强度、24 h强度高达14.5 MPa,弹性模量为5.8 GPa。通过采用低密度高强度韧性防窜水泥浆、抗污染冲洗隔离液技术、软件模拟、优化浆柱结构、结合低密度与常规密度正注和反挤等配套技术,确保了蓥北1井φ273.05 mm套管固井施工安全,固井质量合格率为85%、优质率为65%。为西南油气田窄密度窗口固井提供了技术参考。Abstract: The φ273.05 mm section of the well Yingbei-1 (Southwest Oilfield) penetrated formations with widely distributed thief zones and active oil and gas zones. Low density low temperature cement slurries used in previous cementing operations had low strength and slow hardness development. To address these problems encountered, a high strength low density (1.23 g/cm3) cement slurry with high toughness and the ability of anti-channeling has been developed. This cement slurry has thickening time that is adjustable and fast developed gel strength. The strength of the cement slurry develops after 440 min at 62℃, and reaches the maximum value of 14.5 MPa after 24 h. The elastic modulus of the cement is 5.8 GPa. Using this cement slurry with other technical measures, such as contaminationresistant flushing spacer, software simulation, optimization of the structure of the cement slurry column, and normal spotting/reverse squeezing etc., the φ273.05 mm casing string was successfully and safely cemented. Rate of certified job was 85% and rate of quality job was 65%. The technology used in cementing the well Yingbei-1 has provided a technical reference for cementing wells with narrow safe drilling windows in southwest oil and gas field.
-
[1] 张华,王大权,胡霖. 安岳气田磨溪009-4-X2井尾管固井技术[J]. 钻井液与完井液,2016,33(3):84-88.ZHANG Hua,WANG Daquan,HU Lin. Liner cementing technology for well Moxi 009-4-X2 in block Anyue[J].Drilling Fluid & Completion Fluid,2016,33(3):84-88. [2] 高元,桑来玉,杨广国,等. 胶乳纳米液硅高温防气窜水泥浆体系[J]. 钻井液与完井液,2016,33(3):67-72.GAO Yuan, SANG Laiyu, YANG Guangguo, et al. Cement slurry treated with latex nano liquid silica antigas-migration agent[J].Drilling Fluid & Completion Fluid,2016,33(3):67-72. [3] 许加星,邹建龙,朱海金,等. 胶乳水泥浆的防气窜性能评价及应用[J]. 钻井液与完井液,2011,28(S0):20-22.XU Jiaxing,ZOU Jianlong,ZHU Haijin,et al. Antimigration evaluation and application of latex cement slurry[J]. Drilling Fluid & Completion Fluid,2011,28(S0):20-22. [4] 杨广国,陶谦,高元,等. 高温高压气井复合型水泥浆体系研究与应用[J]. 科学技术与工程,2016,16(20):151-155.YANG Guangguo,TAO Qian,GAO Yuan,et al. Research and application of high temperature high pressure gas well complex cement slurry[J]. Science Technology and Engineering,2016,16(20):151-155. [5] 刘子帅,李拥军,唐守勇,等. 安探1X高温深探井小间隙固井技术[J]. 钻井液与完井液,2017,34(4):90-95.LIU Zishuai, LI Yongjun, TANG Shouyong, et al. Cementing high temperature deep well antan-1X with narrow annular apaces[J]. Drilling Fluid & Completion Fluid,2017,34(4):90-95. [6] 于永金,靳建洲,齐奉忠. 功能性固井工作液研究进展[J]. 钻井液与完井液,2016,33(4):1-7.YU Yongjin,JIN Jianzhou,QI Fengzhong. Progress of study on functional cementing fluids[J]. Drilling Fluid & Completion Fluid,2016,33(4):1-7. [7] 刘仍光, 张林海, 陶谦, 等. 循环应力作用下水泥环密封性实验研究[J]. 钻井液与完井液, 2016, 33(4):74-78.LIU Rengguang,ZHANG Linhai,TAO Qian,et al. Experimental study on airtightness of cement sheath under alternating stress[J]. Drilling Fluid & Completion Fluid, 2016,33(4):74-78. [8] 高云文,胡富源,韩琴,等. 水泥石力学性能对井筒密封完整性的影响[J]. 钻井液与完井液,2014,31(3):53-56.GAO Yunwen,HU Fuyuan,HAN Qin,et al. Effect of mechanic property of set cement on seal integrity of borehole[J]. Drilling Fluid & Completion Fluid,2014, 31(3):53-56. [9] 郭辛阳,步玉环,李强. 变内压条件下膨胀水泥性能对井筒完整性的影响[J]. 钻井液与完井液,2018,35(2):98-103.GUO Xinyang,BU Yuhuan,LI Qiang. Effect of properties of expansive cement on wellbore integrity under changing casing internal pressure[J]. Drilling Fluid & Completion Fluid,2018,35(2):98-103. [10] 丁志伟,杨俊龙,汪瑶,等. 低温高强韧性水泥浆在致密油水平井的应用[J]. 钻井液与完井液,2017,34(2):106-110.DING Zhiwei,YANG Junlong,WANG Yao,et al. Cementing tight reservoir with low temperature high strength tough cement slurry[J]. Drilling Fluid & Completion Fluid,2017,34(2):106-110. [11] 黄锦,姚晓,姜祥,等. 粒径对油井水泥水化热及力学性能的影响[J]. 钻井液与完井液,2017,34(2):87-92.HUANG Jin,YAO Xiao,JIANG Xiang,et al. Effects of paiticle size on hydration heat and mechanical performance of cement[J]. Drilling Fluid & Completion Fluid,2017,34(2):87-92. [12] 耿建卫. 一种低温早强低密度水泥浆[J]. 钻井液与完井液,2017,34(4):65-68.GENG Jianwei. Study and application of low temperature early strength low density cement slurry[J]. Drilling Fluid & Completion Fluid,2017,34(4):65-68. [13] 张华, 丁志伟, 肖振华, 等. 窄密度窗口及小间隙超深井尾管固井技术[J]. 钻井液与完井液, 2018, 35(4):87-91, 96. ZHANG Hua, DING Zhiwei, XIAO Zhenhua,et al.Liner cementing in ultra-deep wells with narrow drilling window and small annular clearance[J].Drilling Fluid & Completion Fluid, 2018, 35(4):87-91, 96.
点击查看大图
计量
- 文章访问数: 628
- HTML全文浏览量: 178
- PDF下载量: 153
- 被引次数: 0