OBEN GAS DEVELOPMENT PROJECT
OBEN GAS DEVELOPMENT PROJECT
OBEN GAS DEVELOPMENT PROJECT
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Chapter Two Project Justification<br />
Existing Facilities<br />
Agbara<br />
West West African African Gas Gas Pipeline Pipeline Project Project<br />
Figure 2.1: Map of the Western Domestic Gas Network showing Oben Location<br />
2.6.1 Wells/Flowlines<br />
To NEPA Lagos<br />
Agbara/Otta,<br />
& WAGP<br />
Ota<br />
Escravos Lagos<br />
Pipeline System (ELPS)<br />
Lagos Lagos<br />
ELPS<br />
Ikorodu Ajaokuta<br />
Escravos Escravos<br />
Benin<br />
Utorogu<br />
Aba<br />
Bonny Bonny<br />
Port Port Harcourt Harcourt<br />
Abuja Abuja<br />
There are three (3) existing wells and associated flowlines in Oben gas plant (Fig. 2.2). These flowlines<br />
are 6”, class 2500, carbon steel material. The flowlines lengths are as follows:<br />
Well 26 1.0km<br />
Well 27 1.0km<br />
Well 28 0.5km<br />
Oben<br />
Afam<br />
As part of normal flowline replacement strategy, accentuated by integrity from prolonged use without<br />
corrosion inhibition it is proposed to replace the flowlines using identical flowline specifications (6”,<br />
class 2500, carbon steel material). Each of these wells has existing 1” (carbon steel, class 2500)<br />
corrosion inhibitor lines to the wellheads, which will also be replaced.<br />
The proposed new NAG well on the D5 reservoir (Well 29) shall be drilled near the existing Well 28 slot<br />
and will be hooked up using the replaced Well 28 flowline - 0.5km, 6”, class 2500, carbon steel flowline.<br />
2.6.2 Process Flow Scheme for the Existing Oben Gas Plant<br />
Oben gas plant has two (2) LTS Gas Process Modules. Gas from the production header is routed to<br />
either of the LTS modules each rated for 45MMscf/d. Gas entering each module is stripped of entrained<br />
2-3<br />
To Ajaokuta<br />
& proposed<br />
Abuja IPP<br />
SAPELE<br />
Makaraba<br />
(Chevron)<br />
Jones<br />
Creek<br />
Sapele<br />
DELTA<br />
Kokori<br />
Okan<br />
(Chevron)<br />
Mefa<br />
Escravos<br />
Beach Odidi<br />
(Chevron)<br />
Forcados<br />
Warri<br />
Utorogu<br />
Ughelli<br />
UzereEast<br />
LEGEND:<br />
Chevron Line<br />
Existing NGC Lines<br />
SPDC Lines<br />
AgipLine (Eleme Petro. Chemical) Chemical)<br />
NLNG Lines<br />
OGGS<br />
Flowstations<br />
Industrial plant<br />
Power station<br />
AGG facility<br />
NGC compressor<br />
NAG plant<br />
CheveronGP<br />
Connection No Connection
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