“三超”油气井井控技术难点及对策

发布时间：2018-01-10 22:15

本文关键词：“三超”油气井井控技术难点及对策　出处：《石油钻探技术》2017年04期 　论文类型：期刊论文

【摘要】："三超"油气井的超深、超高温和超高压特点给井控装备配套和井控安全带来了严峻挑战,在钻井过程中发生井涌溢流的概率较大,需要对其井控技术难点及对策进行探讨分析。在给出"三超"油气井定义的基础上,介绍了国内典型"三超"油气井的钻井情况,论述了"三超"油气井在地层压力预测、井身结构优化设计、溢流监测与井底压力确定等方面存在的主要问题,从井控装备配套、提高套管强度和溢流早期监测等方面提出了技术对策,并结合"三超"油气井井控特征提出了一种动态变参数压井方法,即设计采用不同密度的压井液进行压井,压井过程中动态调整压井液排量、分段泵入不同密度的压井液,实现套压的快速降低,提高一次压井成功率。研究结果为今后"三超"油气井的井控关键技术研究及井控装备配套提供了技术参考。
[Abstract]:The ultra-deep, ultra-high temperature and ultra-high pressure characteristics of "Sanchao" oil and gas wells bring severe challenges to well control equipment and well control safety, and the probability of wellbore overflow in drilling process is high. Based on the definition of "Sanchao" oil and gas wells, the drilling conditions of typical "Sanchao" oil and gas wells in China are introduced. This paper discusses the main problems existing in formation pressure prediction, well structure optimization design, overflow monitoring and bottom hole pressure determination in "Sanchao" oil and gas wells. Technical countermeasures are put forward to improve casing strength and early monitoring of overflow, and a dynamic variable parameter well killing method is put forward in combination with the well control characteristics of "Sanchao" oil and gas wells. That is to design the different density of the fluid to kill the well, in the process of the process of dynamic adjustment of fluid displacement, pump into different density of the killing fluid, to achieve the rapid reduction of casing pressure. The results provide a technical reference for the study of key well control techniques and the matching of well control equipment for the "Sanchao" oil and gas wells in the future.
【作者单位】：中国石化石油工程技术研究院;
【基金】：国家自然科学基金重点项目“超深井钻柱非线性动力学及动态安全性基础理论研究”(编号:U1663205) 中国石化科技攻关项目“顺南顺托深部海相地层钻井关键技术研究”(编号:P15173)与“精细控压钻井技术研究”(编号:P12075)部分研究内容
【分类号】：TE28
【正文快照】： 目前,我国油气勘探开发逐步向四川盆地、塔里木盆地等深部复杂地层推进。这些地区油气资源埋藏超深、井底压力和温度超高,导致了一系列的钻井难题,尤其是井控安全问题突出[1]。统计表明,高温高压深井发生井涌或井喷的频率较常规浅井增加20%以上,非生产时间和经济成本增加3倍以

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