21-8 – Subsurface uncertainties, unfamiliar technologies and shallow water flows in a subsea exploration well
We monitor IOGP’s ‘Well control Incident lesson sharing’ which is a regular email that alerts the industry to recent incidents with the hope of sharing knowledge and preventing future well control incidents.
IOGP shared well control lesson 2021-8 ‘Subsurface uncertainties, unfamiliar technologies and shallow water flows in a subsea exploration well’ on 1 October 2021.
During the drilling of tophole sections on a subsea exploration well, the crew experienced a series of water flows in both the initial well and the subsequent re-spud location.
Several lessons were identified relating to subsurface uncertainties, well planning, and the detection of well flow, while operating with a riserless mud recovery system (RMR).
- The importance of understanding and planning for subsurface uncertainties in well operations.
- Risks associated with the implementation of new technologies in well operations, including the management of risks with crew’s knowledge, skills and ability.
We have created a short explanation about how these lessons relate back to the IWCF Drilling and WIPC syllabi.