PT Perta-Samtan Gas facilities are designed to extract the optimum amount of natural gas liquids from a combination of gas sources available at the existing SKG-10 Prabumulih Barat gas metering station. An NGL Extraction Plant, which will be located adjacent to the SKG-10 metering station, will provide the means for extracting the natural gas liquids from the pipeline gases. Following extraction, lean gas will be returned to the metering station and extracted liquids will be transferred to a Fractionation plant which will be located in the Pertamina Plaju / Sungai Gerong refinery, designation RU III at Palembang. A buried pipeline approximately 87kms in length will transport the liquids to the refinery. At the refinery the liquids are fractionated and stored with ship loading facilities installed at an existing jetty that will be refurbished as part of the project scope.
A flow scheme has been developed to process 250 MMscfd of feed gas, producing 546 M. tons/day of LPG, 225 M. tons/day of condensate and 160 M. tons/day of excess propane.
The extraction plant at Prabumulih Barat is designed to be totally self-reliant by necessity in the provision of all utility systems, with the only systems crossing the boundary fence, being the feed gas supply, the lean gas return, the NGL pipeline and a fuel gas start-up line.
At Plaju/Sungai Gerong refinery certain utility systems will be available for use in the fractionation plant and tie-ins to these utilities are included in the scope of work. Any other utility not provided by the refinery is to be provided as part of the scope of work.
Products to be shipped from the refinery will be mixed LPG, excess propane and condensate liquids for sales purposes. The design philosophy is to recover the maximum quantity of propane plus components by use of the UOP licensed a�?Ortloffa�? process technology and fractionate the mixed natural gas liquids to produce:
Feed Gas Composition [Design Basis]
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COMPONENT | COMPOSITION (MOLE %) |
Carbon Dioxide | 3.609 |
Nitrogen | 0.213 |
Methane | 85.109 |
Ethane | 5.284 |
Propane | 3.395 |
i-Butane | 0.671 |
n-Butane | 0.809 |
i-Pentane | 0.307 |
n-Pentane | 0.168 |
n-Hexane | 0.196 |
Heptane | 0.156 |
Octane | 0.071 |
Nonane | 0.012 |
Decane | 0.002 |
Total | 100 |
H2O | Assume water content is 14 lbs/MMscf |
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Product Specification
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- Propane
Maximum RVP at 100A�F | : | 200 psig | |
Maximum Outlet Temperature | : | 120A�F | |
Water Content | : | No Free Water | |
Corrosivity | : | 1 Copper Strip (prefer 1A) | |
Total Sulfur | : | 15 grains/cu.ft.max. (ASTM-D784) | |
Composition: | |||
C2 | : | < 0.3 % vol | |
C3 | : | > 96.0 % vol | |
C4 | : | < 4.0 % vol | |
C5 + | : | Nil |
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