Modelling the behaviour and environmental impact of cuttings piles during decommissioning

Authors: Tyler, A.O., Sabeur, Z.A. and Hockley, M.C.

Journal: Underwater Technology

Volume: 25

Issue: 2

Pages: 39-50

ISSN: 0141-0814

DOI: 10.3723/175605402783219109

Abstract:

A model has been developed to predict the evolution of cuttings piles comprising discharged drilled strata and associated additives, under natural environmental forcing, and man-made operational disturbances. The model uses a Lagrangian particle-tracking technique to represent the three-dimensional erosion and physical dispersion of particulate material. The model is also able to represent chemical interactions and includes an ecotoxicological risk assessment approach. The model has been run for illustrative disturbances arising from operational intervention on the cuttings pile and natural conditions of tidal/ residual currents and storm waves. Despite the uncertainties in input data, the model has demonstrated a capability to provide quantitative support to decision-making on options for future cuttings pile management. On-going studies are seen as contributing significantly to the refinement of the model and its use in modelling long-term evolution of cuttings piles.

Source: Scopus