TAML-5 Intelligent ERD Offshore Well: A Case Story of Successful Application in the North Caspian
The TAML-5 intelligent extended reach drilling (ERD) offshore well was
the first of this type in the North Caspian Sea. The initial preparation and
detailed follow up allowed to complete the well in a timely manner, without
non-productive time and without deviation from the plan. This paper discusses
the methodology used to prepare for the well construction process including the
thought process, risk management, contingency planning, challenges faced,
engineering and management solutions, results obtained and lesson learned.
To ensure an adequate level of readiness, the preparation started early
in advance. The process included global offset analysis of similar wells from
around the world. Then in depth engineering study of every operation was
performed by splitting all activities in subtasks and reviewing all details.
This resulted in strategy for well integrity and contingency plans for every
operation and tracking of equipment and tools from the factory to the rig. To
ensure the consistency of all phases, a multidisciplinary team was set up and
followed the well from beginning to end.
The detailed operational procedures led to a deep understanding of the
process by all involved parties. This was a vital part of the process when
initial plans had to be changed and re-worked. While, it was not possible to
simply implement the results of the large offset analysis, it provided a solid
engineering basis for all decisions taken. Even though the contingency plans
were not used on this specific well, the post job analysis showed that it is
necessary to keep the same level, or even higher, of contingency planning for
The output from this paper is the thought process and the actual
methodology, including the special aspects that needed to be taken into account
for the proper preparation and execution of a trouble free TAML-5 ERD well. The
methodology can be implemented in any field worldwide, specially on
multilateral wells with high-level completions.