From the start of the current phase of North Field drilling activity in 2002, RasGas Company Limited (RasGas) has continued<br>to push the envelope in terms of both technology and operating practices in drilling and completions. Following the successful<br>introduction of an Optimized Big Bore (OBB) well design in 2002 1,2,3 advancements have been made in areas of drillstring<br>design, drilling optimization techniques, management of lost circulation events and overpressured water flows, and stimulation<br>technology associated with increasingly longer completion intervals. This paper highlights how these advancements have<br>enabled year-on-year improvement in drilling and completion cycle times, even though well complexity has increased over the<br>same time period.


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