Deep Panuke Project Description - Encana

· gas dewpointing;· produced water treatment and disposal; and· extraction and disposal of acid gas and surplus condensate.The process plant also required inlet and export compression to maximize resource recovery and totransport sales gas through the offshore pipeline to market. The production platform was bridge-linkedto a third platform which housed the central control room, non-hazardous utilities, and accommodationsfor offshore workers.The 2002 Project basis was designed to process 400 MMscfd at peak capacity with design allowances toallow peak production year round. This overall concept required significant infrastructure with a totaltopsides weight of approximately 13,000 tonnes to accommodate all the required facilities offshore. Thetopsides were to be built as three separate integrated decks and installed offshore by means of a semisubmersiblecrane vessel.Key similarities in the design basis between the current Project basis and the Project basis for theapproved 2002 CSR are as follows:· fluid composition and properties;· offshore gas processing;· acid gas injection into a subsea reservoir;· produced water treatment and ocean disposal; and· condensate handling, (for the M&NP Option only).Compared to the Project basis for the approved 2002 CSR, the current Project design basis has:· a larger reservoir area requiring subsea completions with tie-backs;· reduced resource estimate;· reduced peak production capacity;· increased volume of produced water; and· a MOPU replacing the three fixed platforms.2.10.2.1 Alternative Assessment MethodologyThe following methodology was used to assess Project alternatives:· review the alternatives and supporting work for the 2002 DPA and determine which fundamentalprinciples and decisions are still valid for the revised resource forecast and current concepts;Deep Panuke Volume 4 (Environmental Assessment Report)· November 2006 2-61