Abstract

Heavy oil (16 – 18 APIo) production operations in Staatsolie's Calcutta field in Suriname can be classified as very complex since it is associated with very heterogeneous and discontinuous shallow (± 1000') reservoirs in remote environmentally sensitive wetland areas that are difficult to access as they sustain unique protected ecosystems.

To optimize productivity and mitigate the risks of operating in this complex environment, fit for purpose technologies and tailor made processes were implemented to address the challenges to:

Choose a production method that sustains a very sensitive ecosystem, ensuring efficient mobility of personnel and equipment with minimum impact on the environment, deal with the high cost of intra-field transportation, deal with the high costs of transportation of produced fluids to the nearest treating facility due to zero disposal in the swamp and dispose drilling fluids

To address these challenges the following solutions were implemented:

A wetland operations strategy was implemented whereby there was no land reclamation to setup production and surface facilities thus minimizing the impact on the ecosystem, a totally self-contained hovercraft-type drilling platform is used to drill wells in the swamp, for well servicing a fit for purpose servicing rig is used, uniquely modified Multi Phase Flow Meters for relatively low producing and low GOR wells are used and surface and subsurface facilities are remote monitored

This very unique mixture of solutions with technologies and fit for purpose processes present new perspectives in resolving particular challenges regarding the economical development of a heavy oilfield in an environmentally sensitive area.

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