兴9砾岩体储气库一次上返固井技术
发布时间：2018-08-16 15:33
【摘要】：针对兴9砾岩体储气库固井过程中存在的井深封固段长、地层承压能力低、砾岩体上部气层活跃、全井水泥浆性能要求高等难点,开展了复合堵漏工艺研究,对水泥浆体系、冲洗隔离一体化体系和浆柱结构进行了优化,并进行了现场应用。研究结果表明:高温承压堵漏体系能显著提高低压地层承压能力;防窜韧性水泥浆体系具有良好的防气窜性能、较高的抗压强度以及较低的弹性模量;低密高强水泥浆体系失水量小、稠化时间可调、早期强度高,能够满足120℃温差下施工需求。大排量注替工艺等配套措施的应用,提高了顶替效率,确保了长封固段一次上返和盖层有效封隔。现场应用效果良好,该技术为兴9储气库后续建设提供了技术支撑。
[Abstract]:In view of the difficulties existing in the cementing process of Xing9 conglomerate gas storage reservoir, such as long deep cementing section, low bearing capacity of formation, active upper gas formation of conglomerate body and high performance requirement of the whole well cement slurry, the study on compound plugging technology is carried out, and the cement slurry system is studied. The integrated system of washing and isolation and the structure of slurry column were optimized and applied in the field. The results show that the high temperature pressure plugging system can significantly improve the pressure bearing capacity of low pressure formation, and the anti-channeling toughness cement slurry system has good gas channeling resistance, high compressive strength and low elastic modulus. The low density and high strength cement slurry system has the advantages of low water loss, adjustable thickening time and high early strength, which can meet the requirement of 120 鈩，
本文编号：2186409
[Abstract]:In view of the difficulties existing in the cementing process of Xing9 conglomerate gas storage reservoir, such as long deep cementing section, low bearing capacity of formation, active upper gas formation of conglomerate body and high performance requirement of the whole well cement slurry, the study on compound plugging technology is carried out, and the cement slurry system is studied. The integrated system of washing and isolation and the structure of slurry column were optimized and applied in the field. The results show that the high temperature pressure plugging system can significantly improve the pressure bearing capacity of low pressure formation, and the anti-channeling toughness cement slurry system has good gas channeling resistance, high compressive strength and low elastic modulus. The low density and high strength cement slurry system has the advantages of low water loss, adjustable thickening time and high early strength, which can meet the requirement of 120 鈩，
本文编号：2186409
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