Exploring a Mature
Theunissen, R. J.,
T. Regan, S. Johansen, Perenco,
Faced with an anomalous well on a developed field Perenco uses an integrated approach to re-define the structure and ultimately prove new reserves.
Turnix is a Perenco operated field offshore
The field was re-mapped and a southern compartment extending beneath the salt overhang was defined. Structural uncertainty was significant with poor seismic imaging beneath the salt and illumination studies indicated that there was little to no signal from beneath the salt wing. Despite this 3D modelling revealed that significant extra volume was possible beneath the salt. Various structural scenarios were used to plan optimal well trajectories.
A deviated well was recently drilled to appraise the southern compartment beneath the salt overhang. This encountered oil bearing sands at two target intervals beneath the salt and has given us a fresh insight into potential undiscovered volumes in salt flank and salt overhang settings.