PeriScope随钻测井技术在海上高含水油藏挖潜中的应用

油藏进入高含水阶段,仍有剩余油潜力可挖。但在剩余油挖潜过程中,存在三方面的风险:(1)如何避开水淹区钻遇剩余油;(2)井网密度低的区域水平井如何着陆;(3)高含水油藏挖潜受水平段进尺的限制,如何提高油层钻遇率。为了降低挖潜风险,海上某油气田采用了PeriScope随钻测井技术,结果成功预测到剩余油区砂顶界面,使得水平井成功着窗,钻成挖潜水平井。实践证明,PeriScope随钻测井技术为高含水阶段的油藏挖潜提供了一条新的思路。

PeriScope LWD Applied in Taping the Remaining Oil of High Water Cut in Offshore Field

There is still some potential to dig the remaining oils when the oil reservoir is at high water cut stage.But there are three risks in the production of remaining oil:(1) How to avoid the risk of drilling into water flooded area to produce remaining oils;(2) How to determine the landing space of horizontal well in the area with low well spacing density;(3) How to improve the penetrated rate of reservoir when the footage of horizontal well was restricted in high water cut area.The technology of PeriScope LWD has been used in order to decrease the risk in digging the potentials of remaining oils,and the sand top has been predicted successfully in remaining oil area.The horizontal well which is used to produce oils was landed successfully.It is proved that the technology of PeriScope LWD is a new method to digging the potentials of remaining oils in reservoirs with high water cut.