Investor Presentaiton
100
LEMIGAS
SUMMARY
The Larger Mergui - North Sumatera Basin is an extensional basin that initaly formed in
Late Paleogene and mostly developed during Neogene time. The North Sumatera back-arc
basin itself is the southern part of the larger Mergui - North Sumatera basin.
➤ Most tectonic elements in the North Sumatera Basin has relatively N-S and NW-SE trends
as product of three tectonic events. Early Tertiary tectonism, Mid-Miocene Tectonism, and
Plio-Pleistocene tectonism. The N-S trends represent Pre-Miocene Structures and the NW-
SE trends are Post Miocene structures
The Petroleum system indicates that the deeper sub-basins of the North Sumatra basin
were suitable for kitchen area. Early hydrocarbon generation began in Mid-Miocene and
critical moment occurred in Plio-Pleistocene. Generated hydrocarbon accumulated into
available plays such as:
Early Miocene Belumai sandstone Play
Miocene reefal carbonate Play
Miocene Baong sandstone Play
Upper Miocene to Pliocene Keutapang sandstone play
Pliocene Seurula sandstone play
Today more than 14 Oil Companies have working areas in this basin, and most of
oil & gas fields located in the onshore areas. Total hydrocarbon reserves recently
are 257.76 MM STB oil and 5.03 TCF gas. There is still more opportunity to find oil
& gas in this basin, especially in the offshore areaView entire presentation