钻采过程中的窜层监测与防护技术的研究

发布时间：2018-05-26 05:52

本文选题：窜流 + 套损　；参考：《西安石油大学》2016年硕士论文

【摘要】：通过对国内外文献的调研分析,发现随着油田开发时间的延长及各种开采方案的实施,窜槽现象越来越严重,影响了油田的正常生产与开发,对储层造成了极大的破坏,也带来了很大的经济损失。因此,对地层进行有效的监测,及时的发现窜漏层段并采取措施是极为重要的。本文首先从从水平和垂直两个角度论述了国内外窜漏的类型及原因,介绍了常规的几种监测技术,并论述了各自适用条件及优缺点,提出了利用试井技术诊断套管外窜流。水平方向主要是利用含水上升速度曲线识别窜流通道类型,判断其水窜类型为孔道型;对存在窜流通道的厚度、渗透率、孔道半径等参数进行计算;再利用试井资料进一步研究分析,用无因次压降曲线识别注水井与生产井之间的优势流动通道。垂向上窜流主要是通过在已有的双渗地层模型的基础上重新推导了套管外窜流的双层油藏模型,最后通过软件绘制了相应的曲线图版,通过预设多组变换的参数进行了曲线的敏感性分析,发现储层渗透率、窜流系数以及表皮因子等皆影响着曲线的特征。对研究区A的3口典型井用swift试井软件选择该模型进行曲线拟合分析,得出相关储层参数,结合已有的测试资料对比分析得知利用试井技术进行窜层的诊断是可行的。最后通过分析造成窜层出现的几个重要环节,论述了如何有效的预防窜层出现以及出现后如何处理以防储层污染,还从油田地下水污染角度进行了相应的分析。
[Abstract]:Through the investigation and analysis of the literature at home and abroad, it is found that with the extension of oil field development time and the implementation of various mining schemes, the channeling phenomenon is becoming more and more serious, affecting the normal production and development of the oil fields, causing great damage to the reservoir and great economic loss. Therefore, the effective monitoring of the formation and timely discovery of the formation have been made. It is very important to take measures to leak out the leakage layer and take measures. This paper first discusses the types and reasons of the leakage at home and abroad from two angles of horizontal and vertical points, introduces several conventional monitoring techniques, and discusses their respective conditions and advantages and disadvantages, and puts forward the use of well test technology to diagnose the outflow of casing. The horizontal direction is mainly using water cut. The rise velocity curve identifies the type of channeling channel, determines the type of water channeling, calculates the thickness, permeability and radius of the channeling channel, and further studies the analysis by the well test data, and uses the dimensionless pressure drop curve to identify the dominant flow channel between the injection well and the production well. The vertical upward flow is mainly through the flow channel. On the basis of the existing double permeability formation model, the double layer reservoir model of the casing flow is derived. Finally, the corresponding curve plate is drawn by the software. The sensitivity analysis of the curve is carried out by the parameters of the presupposition of multi group transformation. It is found that the reservoir permeability, the channeling coefficient and the epidermal factor all affect the characteristics of the curve. This model is selected by swift well testing software in 3 typical wells of A in the study area. The parameters of the reservoir are obtained. Combining with the existing test data comparison and analysis, it is found that it is feasible to use the well test technology to diagnose the channeling layer. Finally, several important links that cause the formation of the channeling layer are analyzed, and how to prevent the channeling effectively is discussed. How to deal with the occurrence and occurrence of the reservoirs in order to prevent the pollution of the reservoirs, and analyze them from the point of view of groundwater pollution.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TE353

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