深井硬地层四级分支井开窗与完井工具优化与应用

发布时间：2018-05-25 17:27

本文选题：分支井 + 深井　；参考：《东北石油大学》2015年硕士论文

【摘要】：一个地面井口多个井下井眼的分支井技术曾被国际石油专家们确立为21世纪初最具发展潜力的八项钻井新技术之首。哈里伯顿公司在2001年至2011年间的十年间,完成了720口分支井,大多达到了4级、5级水平。威德福公司在全球成功完了10000多井次的套管开窗施工。按照完井的难易程度将分支井技术分为六级,其中四级完分支井应用最为广泛。辽河油田深层油气藏、潜山硬地层等难采难动用储量占探明储量的40%以上,存在采用四级分支井技术进一步提高单井控制储量、单井产量,降低边际开发成本的应用需求。常规四级分支井技术存在地层坚硬开窗周期长、造斜器打捞吨位大、液压工具工作围压大等问题。本文研制了硬地层开窗配套工具,以新型磨铣材料及焊接加工工艺解决硬地层常规铣锥磨铣速度慢、单个进尺少的问题,并应用了弧面造斜器、环空防屑装置、新型造斜器打捞装置等配套工具。经过地面试验、现场应用表明,较常规开窗工具在花岗岩硬地层中磨铣速度提高3倍以上、开窗周期提高2倍以上。本文研制了75MPa围压等级下的造斜器底座、丢手工具等分支井完井工具,采用Solidworks软件进行结构的优化设计与分析,并采用地面试验的方法进行验证,并试验优选液压系统的最佳粗糙度与密封方式,经过一口75MPa围压井的现场试验验证了工具的可靠性。
[Abstract]:The branch well technology with multiple downhole at a surface well head has been established by international oil experts as the first of the eight new drilling technologies with the most potential development in the early 21st century. Halliburton completed 720 branch wells between 2001 and 2011, mostly at level 4 / 5. Weidford successfully completed more than 10000 casing window construction around the world. According to the degree of difficulty and ease of completion, the branched well technology is divided into six levels, of which the fourth grade is the most widely used. More than 40% of proven reserves are in deep oil and gas reservoir and hard formation of buried hill. There is a need for further improvement of single well control reserves, single well production and reduction of marginal development cost by using four grade branch well technology. The conventional four grade branch well technology has problems such as long hard window opening period, large fishing tonnage and high working confining pressure of hydraulic tools. In this paper, a matching tool for opening windows in hard stratum is developed to solve the problems of slow milling speed and less single ruler in hard stratum with new grinding and milling materials and welding process, and the arc slanting machine and the annular air debris prevention device are used. New oblique device fishing device and other supporting tools. The field application shows that the grinding and milling speed and the window opening period are more than 3 times and 2 times higher than those of the conventional windowing tools in granite hard strata. In this paper, a branch well completion tool under 75MPa confining pressure grade is developed. The optimal design and analysis of the structure are carried out with Solidworks software, and the method of surface test is used to verify it. The optimum roughness and sealing mode of the optimal selection hydraulic system were tested. The reliability of the tool was verified by a field test of a 75MPa confining well.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE925.3

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