泥页岩井壁失稳预警理论与方法研究

发布时间：2018-08-31 16:50

【摘要】：泥页岩井壁失稳一直是钻井现场十分关注而未能很好解决的工程技术问题。如何在钻井施工过程中及早地发现井壁失稳的征兆,有效地预防和控制井壁失稳引发的各种复杂和事故,是钻井工程技术人员孜孜以求的目标。因此,在现代钻井的技术背景下,深入研究井壁失稳的预警理论和方法具有十分重要的现实意义。本文旨在提出一种基于地质与工程相结合的泥页岩井壁失稳预警思路和方法,并结合计算机领域的相关工具实现预警软件系统的研制和^u发。论文首先调研并分析了泥页岩井壁失稳的机理及成因,在此基础上,提出了地质和工程相结合的预警总体思路,着重阐述了三维地质力学模型的建立过程及沿井眼地质参数的抽取,结合获取的地质参数和现场施工的工程参数建立井壁失稳预警模型,提出预警的量化分级方法,最后利用计算机领域的相关技术实现了泥页岩井壁失稳预警软件系统的部分^u发。泥页岩井壁失稳的预警较为复杂,本文仅仅从地质和工程相结合的角度提出了预警的总体设想和部分实现,尚有诸多因素没有考虑,需要进一步进行探索和研究。
[Abstract]:Shale shaft wall instability has always been an engineering technical problem which has been paid close attention to and failed to solve. How to find the signs of shaft wall instability and effectively prevent and control all kinds of complications and accidents caused by wellbore instability during drilling construction is the goal of drilling engineering technicians. Therefore, under the background of modern drilling technology, it is of great practical significance to deeply study the theory and method of early warning of wellbore instability. The purpose of this paper is to put forward an idea and method for early warning of mud shale shaft wall instability based on the combination of geology and engineering, and to realize the development and development of early warning software system combined with relevant tools in the field of computer. Firstly, the mechanism and cause of shale shaft wall instability are investigated and analyzed in this paper. On the basis of this, a general idea of early warning combined with geology and engineering is put forward. The establishment process of 3D geomechanical model and the extraction of geological parameters along borehole are expounded emphatically. Combined with the obtained geological parameters and the engineering parameters of field construction, the early warning model of shaft wall instability is established, and the quantitative classification method of early warning is put forward. Finally, a part of the early warning software system of shale shaft wall instability is realized by using the related technology in computer field. The early warning of shale shaft wall instability is more complicated. This paper only puts forward the overall assumption and partial realization of early warning from the angle of combining geology and engineering. There are still many factors that have not been considered and need to be further explored and studied.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE24

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