Environmental statement - Flyndre and Cawdor - Maersk Oil

Flyndre and Cawdor Environmental Statement
Section 2 Proposed Development
The Clyde platform will provide the necessary storage and injection equipment to enable the inhibitor
to be injected at the wellhead/pipeline as required.
2.7. CLYDE ‐ OVERVIEW OF EXISTING FACILITIES
Talisman’s Clyde platform (Figure 2‐9) was commissioned in 1986 and is located approximately
276xkm east southeast of Aberdeen and receives on‐platform production from the Clyde, Leven,
Medwin and Nethan reservoirs (referred to as the Clyde fields) as well as production from the Orion
reservoir via a subsea tie‐back. The platform also receives dry gas production from the Affleck
reservoir, which is commingled with the export gas from the platform.
Separate top side production facilities are dedicated to production of the Clyde field hydrocarbons
and those of the Orion field hydrocarbons.
2.7.1. CLYDE PRODUCTION PROCESS
Figure 2‐9 Talisman’s Clyde platform.
Reservoir fluids from the Clyde fields passes from the wellhead assembly via the high pressure
manifold to a first stage separator or via the low pressure manifold to the second stage separator
before entering the third stage separator (Clyde separators). The first and second stage separators
are three‐phase (oil, water, gas) separators and the third stage is a two‐phase (gas, liquid) separator.
A smaller test and clean‐up separator is provided to test wells individually without affecting
production by operating in parallel with the first or second stage separator. The test separator has
also been designed to serve as a back‐up to the first stage production separator when this is out of
commission for cleaning or maintenance.
Processed crude is drawn from the third stage separator through a crude oil dehydrator which
removes the remainder of the water from the oil to a specification maximum of 0.2% basic sediment
2‐ 16 D/4114/2011