Real-Time Bed Boundary Mapping And Formation DIP Image To Navigate Horizontal Well At Channel Sand Case Study: Niru Field - Pertamina UBEP Limau

摘要

PERTAMINA EP’s Niru field development objective is to drain attic oil from the X0 sandstones. The thin fluvial-distributary channel environment of the reservoir brings drilling challenges due to the complex reservoir geometry and uncertain lateral continuity. A horizontal well was planned in order to maximize recovery of oil in this mature oil field well. An integrated LWD solution combining fit for purpose real time measurements from a continuous rotating bottom hole assembly, bed boundary mapping tool, formation images with real time correlation and Geosteering software, was used to steer the well in real time. The real time monitoring of petrophysical parameters, enabled TD to be decided after achieving maximum exposure to the reservoir. In addition, the analysis of dip information from formation images acquired while drilling enabled an important update to the field geological model to be made, while highlighting the limitations in reservoir characterisation of using data from vertical wells drilled into a structure with lateral variations The improved understanding of the reservoir, as well as the capabilities of the deep directional resistivity tool to locate and map the roof of the reservoir while drilling, enabled the wellbore to be maintained 1-2 m below it.