Part III: Flare Reduction Project Family - IPIECA

Section 7. Flare Reduction Project Family
EXHIBIT 7.3:
Flare Gas Recovery for On-Site Power Generation, continued
• The combustion and fugitive emissions associated with dehydration and compression
of the associated gas for flaring in the baseline scenario are the same as dehydration
and compression to prepare this gas for use as fuel in the generator engine drivers in
the project scenario. Similarly, the minor combustion and fugitive emissions
associated with oil-gas separation in the baseline scenario are unchanged by
implementation of the project.
• All of the gas flared in the baseline scenario is used as fuel in the project scenario.
However the quantity of gas is sufficient to meet only 90% of the required annual fuel
stream to the replacement engines, with the remaining 10% of the fuel still supplied in
the form of crude oil.
• Electric power generating capacity is 950 kW in the baseline scenario using the
existing engines. The thermal efficiency of these engines burning only crude oil is
28%. Most of the produced electrical energy is used to drive electric pumps for
shipment of the remaining produced crude oil to an off-site destination.
• Electric power generating capacity in the project scenario uses new, more efficient
engines rated at 1350 kW, and these engines are configured to operate on both
associated gas and crude oil fuel. Thermal efficiency of the replacement engines is
33% on associated gas fuel and 30% on crude oil.
• The quantity of crude oil used for power generation in the project scenario is 2,362
barrels per year. This scenario thus enables 11,601 additional barrels of crude to be
shipped to markets compared with the baseline scenario. The increase in fugitive
emissions associated with this increment of crude oil shipping is negligibly small.
Baseline Emissions
Baseline emissions = CMB 1 + VENT 1 + FUG 1 + IND 1
where,
CMB 1 = Combustion emissions from the flared stream prior to the project and from
the combustion of crude oil to operate the pump engines.
VENT 1 = Vented gas from maintenance or upset conditions associated with gas
separation, dehydration, and compression. The vented emissions also occur
unchanged in the project activity and therefore cancel out in the calculation
of project emission reductions.
FUG 1 = Fugitive emissions from process units associated with gas separation,
dehydration, and compression. These fugitive emissions also occur in the
project activity and therefore cancel out in the calculation of baseline
emission reductions.
IND 1 = Indirect emissions would result from usage of electricity obtained from
outside sources. No such purchased power is used for either the baseline or
project scenarios.
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