Journey of a Coiled Tubing Catenary Operation: Best Practice at South China Sea
In the Malay Basin area, 18 offshore oil and gas fields are operated by
PETRONAS Carigali Sdn. Bhd (PCSB). Years after years of production, the
challenges in managing these matured assets are becoming more and more complex.
To sustain and enhance the production rate at some wells, it requires extra
resources for well intervention works to occur especially related to small or
satellite platforms in the region. The small and satellite platforms limit the
normal coiled tubing operation in term of deck loading capacity, crane
limitation and accommodation during the operation.
In year 2008, PCSB has experienced a significant breakthrough by
conducting CT barge assisted operations for the first time in their operation
and in Malay Basin of South China Sea. During that time, team faced a lot of
hurdles at preparation and execution stage due to limited experience thereof.
Many lesson learnt had been captured and documented for future operation
The journey since 2008 until now has seen the total of four CT barge
assisted operations at PCSB platforms in Malay Basin. All the objectives of
these four operations were successfully met and increased the total production
of oil at about 2500 bbls/day and 30 MMSCF/day. Determine to improve the
quality of each operation at the preparation and execution stage, team has
taken an approach to capture lessons learnt & best practices from one
project and applied them in the subsequent projects.
A wide range of engineering and project assessments from each of the
activities have been developed to help the next CT catenary operations to
achieve the most optimized time, cost and quality. Furthermore, the findings of
this study are valuable for identifying strength and weaknesses in current
approaches. The paper will deliberate on each project’s operation
challenges, lessons learned and best practices towards development of a set of
guidelines in achieving effective execution of CT catenary in different
settings at South China Sea waters.