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AGUSAN - DAVAO BASIN

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					                           AGUSAN - DAVAO BASIN

•   Area               : 18,000 sq km, 70% onshore
•   Source Rocks       : Oligocene to Lower Miocene, oil-prone; Upper
                         Miocene, gas-prone

•   Reservoir Rocks   Eocene to Pliocene sandstones and carbonates
                       :
•   Traps             Structural, stratigraphic and combination
                       :
•   Seals             Local, Paleogene to Neogene clastics
                       :
•   Plays             Reef complexes; submarine fans; fractured platform
                       :
                      carbonates; drapes of shelfal or fluvial-deltaic sands
•   Hydrocarbon Occurrences:      Oil seeps
                 BICOL SHELF - LAMON BAY BASIN

•   Area              34,000 sq km, 95% offshore
                       :
•   Source Rocks      Eocene, gas-prone
                       :
•   Reservoir Rocks   Oligocene to Miocene sandstones and carbonates
                       :
•   Traps             Stratigraphic, structural and combination
                       :
•   Seals             Local, Miocene clastics and carbonates
                       :
•   Plays             Shelfal carbonates or sands; reef complexes; growth
                       :
                      structures; channel infill deposits and graben fills
•   Hydrocarbon Occurrences:      None encountered
                            CAGAYAN BASIN

•   Area            : 28,000 sq km, 80% onshore
•   Source Rocks    : Miocene, gas-prone; Oligocene to Lower Miocene,
                      oil-prone
•   Reservoir Rocks : Oligocene to Pliocene clastics and carbonates
•   Traps           : Stratigraphic and combination
•   Seals           : Regional, Pliocene clastics; local, Miocene clastics
•   Plays           : Miocene carbonate reef complexes and submarine fans or
                      turbidite mounds, Miocene to Pliocene basinal and
                      non-reefal shelfal limestones; Oligocene to Miocene
                      shallow marine drapes/pinchouts and Miocene fluvio-
                      deltaic channel deposits
•   Hydrocarbon Occurrences:     One producing gas field; oil and gas seeps
                           CENTRAL LUZON BASIN

•   Area              16,000 sq km, 90% onshore
                       :
•   Source Rocks      Miocene and Cretaceous, gas-prone
                       :
•   Reservoir Rocks   Miocene to Pliocene sandstones and carbonates
                       :
•   Traps             Stratigraphic, structural and combination
                       :
•   Seals             Local, Miocene to Pliocene clastics
                       :
•   Plays             Reef complexes; submarine fans; pinchouts; deltaic
                       :
                      deposits; channel in-fill deposits and growth structures
•   Hydrocarbon Occurrences:     One gas discovery; gas seeps
                           COTABATO BASIN

•   Area            : 10,000 sq km, 100% onshore
•   Source Rocks    : Lower to Middle Miocene, oil- and gas-prone
•   Reservoir Rocks : Oligocene to Miocene sandstones and carbonates
•   Traps           : Stratigraphic; structural and combination
•   Seals           : Local, Oligocene and Miocene clastics and carbonates
•   Plays           : Thrust folds, fault-bounded; reefs
•   Hydrocarbon Occurrences:     Oil and gas shows, oil seeps
                              ILOCOS BASIN

•   Area            : 15,000 sq km, 50% onshore
•   Source Rocks    : None identified
•   Reservoir Rocks : Middle Miocene to lower Upper Miocene middle fan
                      sandstones and Lower Miocene reefal carbonates
•   Traps           : Stratigraphic and structural
•   Seals           : Regional and local, Miocene clastics
•   Plays           : Reef complexes; turbidite fans and mounds; and wrench- or
                      thrust-faulted structures
•   Hydrocarbon Occurrences:      None encountered
                   NORTHWEST PALAWAN SHELF


•   Area            : 20,000 sq km, 100% offshore
•   Source Rocks    : Oligocene and Miocene, oil and gas-prone; Eocene,
                      oil-prone
•   Reservoir Rocks : Upper Oligocene to Lower Miocene carbonates and
                      sandstones
•   Traps           : Stratigraphic and structural traps
•   Seals           : Regional, Middle Miocene clastics; local, Miocene clastics
•   Plays           : Oligocene/Miocene reef and platform carbonates, clastic
                      and carbonate turbidite pinchouts, drapes and truncations,
                      fault blocks and anticlines
•   Hydrocarbon Occurrences:     Three producing oil fields; oil and gas
                                 discoveries
                      SOUTHEAST LUZON BASIN

•   Area              40,000 sq km, 50% onshore
                       :
•   Source Rocks      Oligocene to Lower Miocene, oil and gas-prone
                       :
•   Reservoir Rocks   Oligocene to Miocene carbonates and sandstones
                       :
•   Traps             Stratigraphic, structural and combination
                       :
•   Seals             Local, Miocene clastics
                       :
•   Plays             Oligocene/Miocene carbonate talus and reefal features,
                       :
                      turbidite mounds, delta fans and shelfal sands
•   Hydrocarbon Occurrences:     Small oil and gas flows from DSTs; oil and gas
                                 shows; oil and gas seeps
                             SULU SEA BASIN

•   Area            : 60,000 sq km, consists of three sub-basins, namely:
                      Balabac sub-basin (100% offshore), Balabac sub-basin
                     (100% offshore) and the Sandakan sub-basin (60% offshore)
•   Source Rocks    : Balabac sub-basin: Middle and Upper Miocene deep
                                            marine claystones, oil-prone
                     Bancauan sub-basin: None identified
                     Sandakan sub-basin: Middle Miocene transitional to
                                            shallow marine claystones, oil-prone
•   Reservoir Rocks : Balabac sub-basin: Miocene sandstones and carbonates;
                                            Paleogene sandstones
                      Bancauan sub-basin: Paleogene and Miocene sandstones
                      Sandakan sub-basin: Paleogene and Miocene sandstones;
                                             Miocene carbonates
•   Traps           : Structural and stratigraphic
•   Seals           : Local, Miocene to Pliocene clastics
•   Plays           : Faulted anticlines; drapes; pinchouts and wedges; wrench-
                      related folds, reef complexes
•   Hydrocarbon Occurrences:      Balabac sub-basin: None encountered
                                  Bancauan sub-basin: None encountered
                                  Sandakan sub-basin: Gas discovery; oil and gas
                                                        shows
               SOUTH PALAWAN SHELF - REED BANK

•   Area                : 100,000 sq km, 90% offshore
•   Source Rocks        : Eocene, gas-prone; Lower Miocene, oil-prone
•   Reservoir Rocks     : Cretaceous through Pliocene sandstones and carbonates
•   Traps               : Stratigraphic, structural and combination
•   Seals               : Regional, Eocene and Miocene clastics; local, Cretaceous
                          and Oligocene through Pliocene clastics and carbonates
•   Plays               : Reef; fractured non-reefal carbonates; thrust folds;
                          turbidites; drapes; wrench-related folds and tilted fault
                          blocks
•   Hydrocarbon Occurrences:          Two non-commercial gas/condensate
    discoveries; one non-commercial gas discovery; oil shows
                              VISAYAN BASIN


•   Area            : 80,000 sq km, 60% offshore
•   Source Rocks    : Oligocene to Middle Miocene, oil- and gas-prone; maturity
                      for Middle Miocene source doubtful
•   Reservoir Rocks : Oligocene to Miocene carbonates and sandstones
•   Traps           : Stratigraphic, structural and combination
•   Seals           : Regional, Miocene to Pliocene clastics; local, Miocene
                      clastics and carbonates
•   Plays           : Thrust- or strike-slip related folds; tilted fault
                      blocks/paleohorst; submarine fans; reef complexes; down-
                      to-the-basin faults; intrusion-generated folds;
                      depositional/ erosional truncation; drapes
•   Hydrocarbon Occurrences:      Small oil and gas flows from DSTs; oil and gas
                                  shows; oil and gas seeps; bitumen deposits
                       WEST LUZON PLATFORM

•   Area              12,500 sq km, 60% offshore
                       :
•   Source Rocks      None identified
                       :
•   Reservoir Rocks   Oligocene through Pliocene sandstones and carbonates
                       :
•   Traps             Stratigraphic and combination
                       :
•   Seals             Local, Miocene clastics
                       :
•   Plays             Wrench-related folds; basement drapes or onlaps; folded
                       :
                      submarine fan deposits; drapes over paleohighs; faulted
                      talus carbonates and reef complexes
•   Hydrocarbon Occurrences:     None encountered
                      MINDORO-CUYO PLATFORM


•   Area            : 110,000 sq km, 90% offshore
•   Source Rocks    : Eocene, gas-prone; Miocene, oil-prone
•   Reservoir Rocks : Eocene to Lower Miocene quartzose sandstones of various
                      facies including turbidites and shelfal types
•   Traps           : Structural and stratigraphic traps
•   Seals           : Local, Paleogene and Neogene clastics and carbonates
•   Plays           : Thrust folds, horst/ridge structures, onlaps or pinchouts,
                      reef complexes, slope and fan wedges
•   Hydrocarbon Occurrences:      One oil discovery; oil and gas shows; gas and oil
                                  seeps
                  ILOILO BASIN - WEST MASBATE SHELF

•   Area              9,800 sq km, 60% offshore
                       :
•   Source Rocks      None identified
                       :
•   Reservoir Rocks   Oligocene to Miocene carbonates and sandstones
                       :
•   Traps             Stratigraphic and combination
                       :
•   Seals             Regional, Pliocene clastics; local, Miocene clastics
                       :
•   Plays             Faulted sandstone pinchouts and drapes; onlapping or
                       :
                      faulted shelf carbonates; carbonate buildups and carbonate
                     drapes over paleohighs
•   Hydrocarbon Occurrences:     Minor oil show

				
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