马深1井超深小井眼固井技术研究与实践
发布时间：2018-08-25 20:39
【摘要】：马深1井完钻井深为8 418 m,完井下入φ146.1 mm尾管封固气层。井下高温高压、环空间隙小、顶替效率低、安全窗口狭窄、U型管效应严重等问题突出。针对以上难点,运用动态承压实验能更准确地模拟固井井筒压力变化,防止井漏;入井流体呈现密度级差及流变级差,利于提高顶替效率;三级冲洗前置液体系抗污染能力强,冲洗效果好;通过优选抗高温水泥添加剂研发了抗高温胶乳防气窜水泥浆体系,其在高温下稳定性好,防气窜能力强,水泥石具有良好的抗压强度及弹韧性;变排量施工及有效层流驱替技术减弱了U型管效应,能够防漏并保证顶替效率。该体系缓凝剂BS200-G、BS200R加量为0.7%和3%,稠化时间易调且不易受密度、温度影响;胶乳JR加量优选为12%,领浆、尾浆呈直角稠化,SPN值为0.9、0.5,静胶凝强度过渡时间为28、22 min,同时浆体还具有较高的流动度和较好的流变性。加入50%石英砂后减弱了高温对水泥石强度的影响,且后期发展呈现良好的趋势。添加1%塑性剂BS600的水泥石弹性模量与常规水泥石相比下降53.13%,塑性明显增强。实验说明,该体系耐高温性强、流变性好、防窜能力强、水泥石力学性能优良。通过应用抗高温胶乳防气窜水泥浆体系并配套以上技术措施,该井施工顺利,固井质量优质。
[Abstract]:The drilling depth of Mashen 1 well is 8 418 m, and the completion of the well is completed with 蠁 146.1 mm tail tube sealing gas reservoir. Underground high temperature and high pressure, small annulus clearance, low displacement efficiency, safety window narrow U-tube effect is serious and so on. In view of the above difficulties, the dynamic pressure experiment can more accurately simulate the change of cementing wellbore pressure and prevent well leakage; the flow into the well presents density and rheological differential, which is conducive to improving the displacement efficiency; the third stage washing front liquid system has strong anti-pollution ability. The high temperature latex gas channeling resistant cement slurry system is developed by selecting the high temperature cement additive, which has good stability, strong gas channeling resistance ability and good compressive strength and elastic toughness. Variable displacement construction and effective laminar displacement technology weaken the U-tube effect, prevent leakage and ensure displacement efficiency. The dosage of retarder BS200-G,BS200R is 0.7% and 3%, the thickening time is easy to adjust and is not easily affected by density and temperature. The SPN value of tailings is 0.9 ~ 0.5, the transition time of static gelling strength is 2822 min, and the slurry has higher fluidity and better rheology. After adding 50% quartz sand, the influence of high temperature on the strength of cement stone was weakened, and the later development showed a good trend. The elastic modulus of cement stone added with 1% plastic agent BS600 is 53.13% lower than that of conventional cement stone, and the plasticity is obviously enhanced. The experimental results show that the system has strong resistance to high temperature, good rheology, strong ability of anti-channeling and excellent mechanical properties of cement stone. Through the application of high temperature latex to prevent gas channeling cement slurry system and supporting the above technical measures, the well construction is smooth and the cementing quality is high quality.
【作者单位】： 中石化中原石油工程有限公司西南钻井分公司;中石化中原石油工程有限公司固井公司;
【分类号】：TE256.3
，
本文编号：2204032
[Abstract]:The drilling depth of Mashen 1 well is 8 418 m, and the completion of the well is completed with 蠁 146.1 mm tail tube sealing gas reservoir. Underground high temperature and high pressure, small annulus clearance, low displacement efficiency, safety window narrow U-tube effect is serious and so on. In view of the above difficulties, the dynamic pressure experiment can more accurately simulate the change of cementing wellbore pressure and prevent well leakage; the flow into the well presents density and rheological differential, which is conducive to improving the displacement efficiency; the third stage washing front liquid system has strong anti-pollution ability. The high temperature latex gas channeling resistant cement slurry system is developed by selecting the high temperature cement additive, which has good stability, strong gas channeling resistance ability and good compressive strength and elastic toughness. Variable displacement construction and effective laminar displacement technology weaken the U-tube effect, prevent leakage and ensure displacement efficiency. The dosage of retarder BS200-G,BS200R is 0.7% and 3%, the thickening time is easy to adjust and is not easily affected by density and temperature. The SPN value of tailings is 0.9 ~ 0.5, the transition time of static gelling strength is 2822 min, and the slurry has higher fluidity and better rheology. After adding 50% quartz sand, the influence of high temperature on the strength of cement stone was weakened, and the later development showed a good trend. The elastic modulus of cement stone added with 1% plastic agent BS600 is 53.13% lower than that of conventional cement stone, and the plasticity is obviously enhanced. The experimental results show that the system has strong resistance to high temperature, good rheology, strong ability of anti-channeling and excellent mechanical properties of cement stone. Through the application of high temperature latex to prevent gas channeling cement slurry system and supporting the above technical measures, the well construction is smooth and the cementing quality is high quality.
【作者单位】： 中石化中原石油工程有限公司西南钻井分公司;中石化中原石油工程有限公司固井公司;
【分类号】：TE256.3
，
本文编号：2204032
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