Surgil ESIA Report - Volume III - EKN

Surgil ESIA Report - Volume III
Figure A.12: GSP Process Schematic
Source: Technical Review Report, Nexant, Feb 2011
A.3.2.1. Reception Facilities
The volume of the combined feed gas from Surgil and East Berdakh Fields will be measured with a new
inlet gas metering station. Downstream of the metering station, there will be a feed gas inlet filter
separator, where entrained hydrocarbon liquids are separated from the feed gas and are routed to the
Unstabilized Condensate Treatment Plant. The gas will then be re-compressed with a feed gas
compressor and sent to Feed Gas Chilling, Dehydration & Mercury Removal Unit.
A.3.2.2. Feed Gas Chilling, Dehydration and Mercury Removal Unit
Molecular sieve technologies will be used for the dehydration and mercury removal process steps.
Molecular sieves are adsorbents composed of aluminosilicate crystalline polymers (zeolites) which
efficiently remove low concentrations of polar or polarisable contaminants such as water, methanol,
hydrogen sulphide, carbon dioxide, COS, mercaptans, sulfides, ammonia, aromatics and mercury down to
trace concentrations. Molecular sieves will also reduce water concentration to less than 1ppm which is
necessary for further downstream processing.
Mercury is typically removed to prevent risk of metal embitterment of downstream plant. The exact process
design is not fully confirmed at this point and may include the mercury removal facility being placed after
the dehydration unit, or combined with the dehydration unit.
254793/RGE/GEV/03/01/03/08/2011
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