提高复杂轨迹水平井固井质量配套技术研究

发布时间：2018-04-28 23:22

本文选题：复杂轨迹 + 影响因素　；参考：《东北石油大学》2017年硕士论文

【摘要】：由于钻井技术的不断提高,相应的各种复杂轨迹水平井数量也在大幅度的增加。由于井身结构复杂多变,在固井设计施工中各种因素之间的相互作用,对固井质量造成很大的影响。本文就复杂轨迹水平井的各种影响因素进行分析与深入的研究,寻找复杂轨迹水平井固井质量的提高技术方案。通过分析,提高复杂轨迹水平井固井质量可以从以下四个方面进行研究,分别是套管柱下入力学研究、顶替效率提高、水泥浆体系的优选和固井施工的配套技术,其中套管柱的力学研究是提高顶替效率的基础。进行套管柱与井身结构的力学分析,建立数学模型,对套管柱的结构进行优化,达到套管居中度与环空过流性能最优的组合。提高一二界面的胶结强度,优化冲洗液与各种水泥浆配方,最终获得一套完整的水泥浆体系,实现冲洗液能够净化胶结界面,水泥浆性能稳定达到封固指标。现场施工配套技术,避免因工艺或突发事件等原因影响固井质量,并制定一整套完整的施工保障技术。通过以上技术研究与现场应用试验,最终获得一套完整的复杂轨迹水平井固井施工技术,为提高此类井固井质量,提供技术理论支撑。套管柱的优化设计、水泥浆优选和现场施工保障措施,在本篇文章中都进行了详细的阐述与论证,并依照以上的技术措施进行现场应用,最终水平井封固段固井质量优质井段比率提高到70%以上,对比上一年水平井优质段比率提高20个百分点以上。
[Abstract]:Due to the continuous improvement of drilling technology, the number of horizontal wells with various complex trajectories is increasing greatly. Due to the complex and changeable well shaft structure, the interaction of various factors in cementing design and operation has a great influence on cementing quality. In this paper, the factors affecting the horizontal well with complex trajectory are analyzed and studied deeply, and the technical scheme to improve the cementing quality of the horizontal well with complex trajectory is found. Through analysis, the improvement of cementing quality of horizontal wells with complex trajectory can be studied from the following four aspects: casing string entry mechanics research, displacement efficiency improvement, cement slurry system optimization and cementing operation matching technology, The mechanical study of casing string is the basis of improving displacement efficiency. The mechanical analysis of casing string and wellbore structure is carried out, and the mathematical model is established to optimize the casing string structure to achieve the best combination of casing centrality and annular flow performance. By improving the cementing strength of the first and second interfaces and optimizing the flushing fluid and various cement slurry formulations, a complete set of cement slurry system is obtained, which can purify the cementing interface, and the cement slurry performance is stable enough to meet the sealing index. Field construction supporting technology to avoid affecting cementing quality due to technology or unexpected events, and to formulate a complete set of construction support technology. Through the above technical research and field application test, a complete set of cementing technology for horizontal wells with complex trajectory is obtained, which provides technical theoretical support for improving the cementing quality of such wells. The optimum design of casing string, the optimal selection of cement slurry and the field construction guarantee measures are all expounded and demonstrated in detail in this article, and the field application is carried out according to the above technical measures. Finally, the cementing quality of the cementing section of horizontal wells is increased to more than 70%, and the ratio of high quality section of horizontal wells to that of the previous year is increased by more than 20 percentage points.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE256

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