Surgil ESIA Report - Volume III - EKN

“O’ZLITINEFTGAZ” PC
PFS “Surgil field complex costruction with valuable
components retrieval”
Length is 108km.
On all loops at the distance of 14-15m from wellhead there are arranged “П” shaped
compensators for thermal-changes compensation of laid length. Loops are laid into ground
with deepening 1m to the top of forming pipe and covered by anticorrosive isolation.
At this stage, the land resources (temporary and constant allotment of lands under
construction), atmospheric air - from burning of technologically necessary emissions on
wells flares are the objects of impact. Underground waters will not undergo specific
changes.
2.5 GAS GATHERING STATIONS (GGS) AND COLLECTORS PROJECT
By all variants of PFS there are provided gas gathering stations in number of three
pieces. Difference by variants is the quantity of input loops to gas gathering stations. There
is also provided incoming-line unit for seven wells and three collectors from gas gathering
stations in the CGTU area by all variants.
GGS-1. 2 and 3 (figure 3 and 4) are consists of following constructions:
- incoming-line unit (GS);
- platform for torch farm;
- drainage tank for torch farm.
There is provided on GGS:
- purging of loops on torch;
- protection of loops from pressure excess.
The incoming on GS of GGS loops from wells are equipped by safety valves for
protection of loops from pressure excess (safety valves of Drain Safety Spring Valve type
through T-valve are binding on a torch). By means of tap valves each loop is binding on a
torch for purge execution during liquid gathering. Besides, there are installed disconnecting
tap valves, adjustable choke, and float valve on a loop.
GGS territory is fenced; the torch platform also has the fence and is taken out on
100m.
Preliminary hydraulic calculation of connecting collectors of GGS – Surgil CGTU is
executed for productivity 2.518·10 6 m3/days. Maximum collector length is 3.8km. Gas
pressure and temperature in the beginning of collector make 7.8MPa and 45 0 С relatively.
Volume 2. Part 1. EIS Project for Surgil field construction
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