孤岛油田防砂工艺技术研究与应用

【作者】 岳雷；

【导师】 李晓平； 于龙坤；

【作者基本信息】 西南石油学院 ， 油气田开发工程， 2004， 硕士

【摘要】 本文针对孤岛油田开发过程中油井出砂和防砂存在的问题，通过室内试验，对不同类型油井的出砂机理进行了研究，对防砂方法和相应的配套工艺技术进行了筛选和改进。 粉细砂岩油井由于埋藏浅、地层压实程度低、胶结疏松，在较大生产压差下容易出砂。研究表明，采用油井分级砾石充填防砂方法，并辅以物理解堵王艺和粘土防膨工艺，能明显增加油井产量、延长防砂有效期。 稠油热采井由于地层疏松以及高温高压蒸汽的注入和高强度的采液，对油层产生了极大的冲击和破坏，这是造成稠油热采井出砂的原因。通过室内试验和研究，确定了采用注汽前化学—机械复合防砂一次性工艺以及高孔密射孔和地层深部处理配套技术，达到了提高稠油热采吞吐效果和防砂的目的。 套损井的防砂主要针对套管外地层亏空、坍塌、套管内通径变化的问题，遵循管外地层处理、管内机械防砂的原则，进行了塑性滤砂管和QJFS复合防砂管的研究和扶正器配套改进研究。应用情况表明，采用该种防砂方法可以改善套损井的生产情况、延长油井的有效生产期。更多还原

【Abstract】 According to the problems of sand production and sand control in the Gudao oil field, the mechanisms of sand production in various wells were analyzed, and the sand control methods and matching technology were studied in this thesis.The fine siltstone reservoir is likely to produce sand under larger pressure drops because of its shallow depth, worse compaction and unconsolidated. To process such wells, graduated gravel packing combined with the physical unplugging technology and the clay expanding protection technology was used. During the thermal recovery of heavy-oil, the injection of steam under high pressure and high temperature and the production with high rate, the chemical-mechanical sanding control method before the injection of steam and matching technology were selected. Using such methods can greatly improve the effect of steam soak during the heavy oil recovery.Due to the formation shortfall, collapse outside the casing and the change of the diameter, the sand control in damaged casing wells was discussed in this paper too. Following the principles of the formation treatment outside the casing and the mechanical sand control within the casing, the plastic sand screen, QJFS compound sand control screen and centralizer were studied. The applications showed that such sand control method can improve the production of damaged casing wells and prolong the life of the wells.更多还原