Investor Presentaiton

100 PETROLEUM SYSTEM RESERVOAR POTENTIAL LEMIGAS ■Early Miocene Belumai sandstone ■Miocene reefal carbonate (Arun limestone, Malacca carbonates) Miocene turbidites of Baong sandstone Upper Miocene to Pliocene Keutapang sandstone Pliocene Seurula sandstone NORTH SOUTH A12 A43 A23 A33 A35 A50 A31 A52 NORTH * * * * * * * * A12 * A43 A33 A28 A35 A50 * * * * * POROSITY BAMPO SHALE TOP ARUN LS BAONG SHALE V GOOD (>20%) GOOD 15-20%) FAIR (10-15%) POOR (<10%) ARUN FIELD POROSITY DISTRIBUTION WITHIN ARUN LIMESTONE CONTROLLED BY TILT HORIZONTAL SCALE MILES 0 KMS PERMEABILITY EXCELLENT >> 100 MD V GOOD 50 100 MD GOOD 10-50 MD FAIR 1-10 MD POOR <<10 MD FIGURE 16 TOP ARUN BAONG SH LS BAMPO SHALE ARUN FIELD PERMEABILITY DISTRIBUTION WITHIN ARUN LIMESTONE CONTROLLED BY TILT HORIZONTAL SCALE 0 MILES KILOMETERS SOUTH A31 A52 * * FIGURE 17 Abdullah & Jordan (1987)

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