Oil-oil correlation of the South Sumatra Basin reservoirs

The research sets about describing the different oil types in the South Sumatra Basin and relating the hydrocarbon to source rocks.Four different groups of oil have been identified; the character of the oils suggests both lacustrine and terrestrial input to the source rocks.Type 1 oils have marine/lacustrine influenced (low pristane/phytane), Type 2 are terrestrially derived (high pristane/phytane ratio), Type 3 are also lacustrine (oils with bimodal distribution of n-alkanes) and Type 4 are biodegraded oils.These oils are distributed randomly in the South Sumatra Basin and are believed to be sourced from the terrestrial TalangAkar and lacustrine Lemat/Lahat formations.