江苏复杂小断块油藏老井侧钻实践与认识

利用停关、低效井实施老井侧钻,其条件包括油藏、井身及技术经济等3个方面。侧钻效益的好坏与油藏类型、侧钻目标有着很大关系,侧钻断块油层、挖掘构造高部位剩余油成功率高,边底水、高渗透油藏侧钻效果好。实践表明,老井侧钻是提高江苏复杂小断块油藏开发效果,降低投资、提高效益的一项重要手段。

Practice and Understanding of Old-well Sidetracking in Complex and Small Fault Blocks in Jiangsu Oilfield

Shut-down wells and low efficient wells are used for old-well sidetracking, its conditions include 3 factors, such as reservoir, wellbore and its technical economy. The efficiency of sidetracking is closely related with reservoir type and sidetracking target. Sidetracking of fault block reservoirs and tapping the potential at high position of a structure are highly successful, sidetracking of reservoirs with boundary water and bottom water and high permeability reservoirs are of good effect. Application shows that old-well sidetracking is one of the important means for improving the development efficiency, reducing cost, raising operation efficiency in complex and small fault blocks in Jiangsu Oilfield.