Invisible Lost Time Reduction and Drilling Risk Management Optimization in United Arab Emirates Onshore Field
A new workflow was implemented for the first time in three UAE onshore
wells with the primary objective being to increase drilling efficiency while
managing the associated risks.
The workflow combines proven technologies, software and wellbore
surveillance services to deliver risk-free wells ahead of authority for
expenditure (AFE) targeting the reduction of nonproductive time (NPT) and
invisible lost time (ILT), together with risk management.
The workflow begins with a preliminary field analysis to identify the
main challenges and areas that needed improvement. The observations are
consolidated on a comprehensive drilling road map by well section that are used
to outline prevention and mitigation measures, expected rate of penetration
(ROP) and recommended drilling parameters. The study also allowed for
identifying performance benchmarks such as average and on bottom ROP and
connection time. Key performance indicators (KPI) were developed to monitor
progress and track the well with respect to well improvements versus the
benchmarks identified. The selection of the monitoring tools and modules
required during the execution phase was developed based on the risks and KPIs
identified during the field study and were further tailored to target specific
challenges such as stuck pipe prevention, hole cleaning, shock and vibration,
and connection time.
The workflow enabled the flawless execution of three onshore wells ahead
of AFE with zero NPT. The closed loop monitoring enabled real time
interventions preventing risks such as stuck pipe, ensuring shoe-to-shoe
drilling, and avoiding potentially lost-in-hole (LIH) costs. This monitoring
process also enabled significant ILT reduction, saving approximately USD 500k
for the three wells.
This case study demonstrates the use of a novel approach to increase
well construction efficiency by eliminating lost time while enhancing risk
control. The main basis for success of this workflow is using existing and
cost-effective technology while capitalizing on the renewed synergy between
different departments such as drilling, mud logging, and well operations
The workflow can be customized based on the different needs by combining
specific modules for monitoring, analysis, and wellbore surveillance services
to increase the efficiency of any well construction.