华北潜山油藏欠平衡钻井技术研究

发布时间：2018-12-11 22:44

【摘要】：欠平衡钻井指的是在钻井过程中井底压力小于地层压力,地层中的流体有控制地进入井筒并且循环到地面上的钻井技术。欠平衡钻井技术是在20世纪90年代国际上成熟并且迅速发展起来的一项钻井新技术。在美国,欠平衡钻井技术被称作上游石油工业新技术,已经成为钻井技术发展的热点,并越来越多地与水平井、多分支井以及小井眼钻井技术相结合。本文从地层压力系数、井底压力控制、储层保护、成本等多个方面对欠平衡方式进行了优选论证,优选出了适于不同潜山储层的欠平衡钻井方式。开展液相欠平衡钻井研究,并根据潜山油藏欠平衡钻井对钻井液性能的要求,进行了潜山欠平衡钻井介质优选;同时开展充气欠平衡钻井研究,从充气条件下的参数规律分析、装备配套、轨迹控制等方面展开研究;研究制定工艺措施保护油藏储层;并开展现场试验应用,取得了非常好的效果。本文提高出水层气体钻井钻进能力,拓展气体钻井井段,同时实现欠平衡与气体钻井与水平井的有效结合,集成配套气体欠平衡钻井技术,为提高单井产量、提速、提效提供技术支撑,促进钻井工程技术典型示范作用,达到规模化推广应用目的。
[Abstract]:Underbalanced drilling is a drilling technique in which the bottom hole pressure is less than the formation pressure and the fluid in the formation enters the wellbore and circulates to the ground. Underbalanced drilling technology is a new drilling technology developed rapidly and mature in the world in the 1990s. In the United States, underbalanced drilling technology, known as the new upstream oil industry technology, has become a hot spot in the development of drilling technology, and more with horizontal wells, multi-branch wells and small hole drilling technology. In this paper, the underbalanced drilling methods suitable for different buried hill reservoirs are optimized and demonstrated from the following aspects: formation pressure coefficient, bottom hole pressure control, reservoir protection, cost and so on. The research of underbalanced drilling in liquid phase is carried out, and the optimal selection of underbalanced drilling medium in buried hill is carried out according to the requirements of underbalanced drilling for buried-hill reservoir on the performance of drilling fluid. At the same time, the research of inflatable underbalanced drilling is carried out, including the analysis of parameter law under inflatable condition, equipment matching, trajectory control and so on, and the establishment of technological measures to protect reservoir. And carried out field test application, and achieved very good results. In this paper, the drilling ability of gas drilling in effluent zone is improved, the well section of gas drilling is expanded, the effective combination of underbalance and gas drilling and horizontal well is realized, and the matching gas underbalanced drilling technology is integrated to increase the production rate and speed of single well. To provide technical support, to promote the typical demonstration of drilling engineering technology, to achieve the purpose of large-scale application.
【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】：TE242

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