底水油藏水平井产能公式的研究 唐远征.docVIP

本科毕业设计（论文）  学生姓名 学　号 教学院系 石油工程学院 专业年级 工程200级 指导教师 职　称 单　　位 辅导教师 职 称 单　　位 完成日期 20年 6 月 日 Southwest Petroleum University Graduation Thesis Grade： Name： Speciality：etroleum Engineering Instructor： School of Petroleum Engineering 2011-6 摘要 水平井技术于1928年提出，20世纪40年代付诸实践，逐渐成为一项非常有前途的油气田开发、提高采收率技术。目前，水平井技术已经广泛应用于底水油藏的开发中。但是水平井开采底水油藏的一个突出问题是底水突破引起原油产量下降、含水率迅速上升，严重时甚至被迫关井。而水平井临界产量是延缓底水脊进、延长无水采油期、确定合理工作制度和提高水平井开发效果的重要参考依据。本文主要通过大量调研国内外相关文献的基础上，研究底水油藏水平井的出水机理，将国内外主要的底水油藏水平井产能公式进行对比，并通过具体实例，进行底水油藏水平井临界产量的计算，结果差异很大，说明由于公式的假设条件和适用范围不同，在计算时，应选择合适的产能公式。利用公式和作图，分析了水平段长度、粘度、各向异性比和油层厚度对水平井产量的影响。结果表明，偏心距对产能的影响很小；适当增加水平段长度有利于产量的提高；原油粘度越大，水平井的产量越低；水平井的产量随油层厚度的增加而提高；而储层非均质性对水平井产量影响较大，随着渗透率各向异性比Kh/Kv的增加，水平井的产量减小，垂向渗透率高的地层更有利于底水油藏水平井产量的提高。 关键词：底水油藏；水平井；产能公式；产能因素 Abstract 　　Horizontal well has been used to oil and gas field development and enhancing oil recovery for a long time since this technology was put forward in 1928 and was used widely in the 1940’s. Currently, horizontal well has been widely used in the development of reservoirs with bottom water. However, the most prominent problem is water cresting caused the decline in the production, the rising of water content or the well shutdown. The critical output of horizontal wells is an important parameter for delaying water cresting, increasing water-free production time, determining reasonable production operation and improving development effectiveness. In this paper, based on mass study on internal and overseas literature, water breakthrough mechanism for horizontal wells was studied. By comparing with the main production formulas, field applications show that we should choose appropriate formulas because of different assumptions and applicability. The effect of horizontal section length, viscosity, anisotropy ratio and reservoir thickness on horizontal well productivity was analyzed by formulas and diagrams. The results show that the eccentricity has minor influence on horizontal well productivity. If the horizon