大庆油田杏76区优快钻井工程设计

发布时间：2018-05-21 00:30

  本文选题：钻井液 + 钻具组合　； 参考：《东北石油大学》2017年硕士论文

【摘要】：随着大庆油田开发的不断深入,油田勘探面临的形势更加严峻,资源的有序接替以及产量规模的保持都是世界级技术难题,加之2015年以来,国际油价持续低迷,油田勘探开发整体效益受到了严重影响,石油天然气行业迎来控投资、减产能和降成本的新形势。在该严峻形势下,钻井技术作为油气资源勘探开发的关键技术手段,起着举足轻重的作用。大庆油田长垣主力油田经过多年的调整开发,进入特高含水开发阶段,调整井钻井中面临着诸多新问题,普遍表现出机械钻速低、井下情况复杂等问题。就杏76区块而言,该区块断层发育,地层倾角变化大,地层破裂压力较低,由于该区块地质构造的特殊性,大大增加了钻井施工过程中井漏、井喷等事故发生的概率,这些都极大地限制了钻井速度的提高,增加了油层保护的难度,因此有必要采用新工艺、新技术、新工具,进一步提高机械钻速,完善相应配套技术,实现该区块安全快速钻井的目标,达到提高机械转速、缩短建井周期,降低成本的目的。由于杏76区地层倾角大,同时发育浅气和断层,地质情况复杂,钻井事故复杂多发,在影响钻井速度的同时给钻井生产带来严重的危害,因此对该地区钻井技术进行优化十分重要。为了有效降低该区块钻井事故的发生,本文在己有的技术基础上进行了深入研究,首先对杏76区的地质构造特征进行了分析,在复杂地质情况条件下钻井事故复杂性进行了研究,重点分析了在钻进过程中形成井塌、井漏等复杂情况的原因,从而对钻井施工产生的影响;开展了对钻井液、钻具组合、钻头及钻井参数优化研究,通过结合本区块的地质条件,开展钻井液体系试验,确定了合理的钻井液配方;通过对钻井液流动试验的分析,优化了井身结构,计算出合理的井眼大小,并优选大水眼的PDC钻头,在提高机械钻速的同时减少井下复杂情况的发生;通过对钻具结构性能的分析,优化了钻具组合及钻进参数。通过对杏76区的钻井技术的优化,可有效降低该区块钻井事故复杂性,加快该区块勘探开发步伐,可为各钻井公司在本区块安全快速钻井施工提供借鉴。
[Abstract]:With the development of Daqing oil field, the situation of oil field exploration is becoming more severe. The orderly replacement of resources and the maintenance of production scale are all world-class technical problems. In addition, since 2015, the international oil price has been in the doldrums. The overall benefit of oil field exploration and development has been seriously affected, and the oil and gas industry is facing a new situation of controlling investment, reducing output and reducing costs. In this severe situation, drilling technology, as a key technical means of oil and gas exploration and development, plays an important role. After many years of adjustment and development, the main oilfield in Changyuan of Daqing Oilfield has entered the stage of super high water cut development. The drilling of adjustment wells is faced with many new problems, such as low drilling speed and complex downhole conditions. As far as Xing76 block is concerned, the fault is developed, the dip angle of formation changes greatly, and the formation fracture pressure is low. Because of the particularity of geological structure in this block, the probability of accidents such as well leakage and blowout in drilling construction is greatly increased. These have greatly limited the drilling speed and increased the difficulty of reservoir protection. Therefore, it is necessary to adopt new technology, new technology and new tools to further improve the drilling speed of machinery and improve the corresponding matching technology. The goal of safe and fast drilling in this block can be achieved by increasing the rotating speed of machinery, shortening the construction period and reducing the cost. Due to the large formation dip angle, the development of shallow gas and faults, the complex geological conditions and complex drilling accidents, the Xing76 area has brought serious harm to drilling production while affecting the drilling speed. Therefore, it is very important to optimize drilling technology in this area. In order to effectively reduce the occurrence of drilling accidents in this block, this paper makes a thorough study on the existing technologies. Firstly, the geological structure characteristics of Xing76 area are analyzed. In this paper, the complexity of drilling accidents under complex geological conditions is studied, and the reasons for the formation of well collapse, well leakage and other complex conditions during drilling are emphatically analyzed, thus the influence on drilling operation, the drilling fluid and the combination of drilling tools are carried out. According to the geological conditions of the block, the drilling fluid system test was carried out to determine the rational drilling fluid formula, and the well structure was optimized by analyzing the drilling fluid flow test. The PDC bit with reasonable hole size and high water hole is calculated to increase the drilling speed and reduce the occurrence of the complex situation in the downhole. Through the analysis of the structure and performance of the drilling tool, the drilling tool combination and drilling parameters are optimized. Through the optimization of drilling technology in Xing76 area, the complexity of drilling accidents can be reduced effectively, the exploration and development pace of this block can be quickened, and the safety and rapid drilling construction of each drilling company in this block can be used for reference.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE22
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本文编号：1916937