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辽河油区东部凹陷火成岩油藏开发始于1971年,1998年以来先后发现黄沙坨、欧利坨等火成岩油气藏,现今已经成为东部凹陷勘探开发主要目的层。辽河油区东部凹陷火成岩油气藏的岩石物性、埋藏深度、含油气情况和地温变化等性质变化较大,在钻井施工中存在局部油藏压力高、井控风险大,井漏、井塌以及机械钻速低、钻头行进尺寸小等难点。通过对地层岩石物性的研究,确定了地层岩性特征、孔隙度和渗透率的取值范围、地层岩石硬度范围和可钻性级别以及适合的钻头型号,为钻井液选型和性能优化、钻头选型优化,以及工程事故和复杂情况的预防技术措施提供了依据。据此形成的辽河油区东部凹陷火成岩深探井快速钻井技术模板,应用于新施工井中,中完井深明显比老井深250~500m,钻井周期和建井周期都大大缩短。
The development of igneous rock reservoirs in eastern sag of Liaohe oil province began in 1971. Since 1998, it has been discovered that igneous rocks reservoirs such as Huangsha Tuo and Ou Li Tuo have become the main target of exploration and development in the eastern sag. Rock properties, burial depth, oil and gas conditions and geothermal changes of igneous rocks reservoirs in east depression of Liaohe Oil Region vary greatly. In drilling, there are some problems such as high local reservoir pressure, high risk of well control, well leakage, well collapse and mechanical Low drilling speed, small drilling bits and other difficulties. Through the study of the physical properties of the stratigraphic rocks, the stratigraphic lithology characteristics, the range of porosity and permeability, the range of formation rock hardness and drillability grade and the suitable bit model are determined. For the drilling fluid selection and performance optimization, Selection and optimization, as well as engineering accidents and complex technical measures to provide a precautionary approach. The resulting rapid drilling technique template for igneous exploration deep wells in the eastern sag of Liaohe oil province is used in new construction wells. The middle completion depth is obviously 250 to 500m deeper than that of the old wells, and the drilling cycle and well construction cycle are both greatly shortened.