Φ GEOX · REGIONAL CROSS-SECTION · OFFSHORE PENINSULAR MALAYSIA

Malay Basin — NW–SE Transect

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SRTM topography: Open-Meteo API · Stratigraphy: PETRONAS Group A–M (Madon 2013) · Tectonics: Cenozoic failed rift + Miocene inversion · 4 founder wells (sovereign canon, F10)

Geological cross-section — Malay Basin

WHERE arif-fazil.com / earth / malay-basin / cross-section WHAT NW–SE transect, ~500 km SCALE vertical ~32× exaggerated LAYERS 8 groups · 4 founder wells

◈ Spatial Locator · NW–SE Transect A–A' (~500 km)

TRANSECT: A (Terengganu Granite) → A' (Central Malay Basin Flank) ORIENTATION: NW–SE (140° Strike) REAL-TIME COORDS: 5.5000° N, 104.5000° E PIPE: Macrostrat Tile API (Live)
Geological-grade cross-section · SRTM + Group A→M stratigraphy arif-fazil.com / earth / malay-basin-cross-section
MSL · 0 m GROUP L/M · LACUSTRINE SHALE (SOURCE) Oligocene · Type I/II kerogen · TOC 1.5-5.0% GROUP K · COARSE SANDSTONE (DEEP PLAY) Oligocene–E. Miocene · alluvial to lacustrine GROUP J · FLUVIAL-DELTAIC GROUP I · COASTAL PLAIN (Angsi · Sotong) GROUP H · LOWER COASTAL PLAIN Excellent reservoir · coal-bearing GROUP F · REGIONAL SEAL · M. MIOCENE GROUP E · DULANG OIL (ANTICLINE) GROUP E · ANGSI OIL+ANTICLINE GROUP D · DELTAIC (EXCELLENT) Group B–C GROUP A · PLIO-RECENT WESTERN HINGE FAULT 2025 wildcat opened new fairway ANTICLINE 1 DULANG ANTICLINE ANGSI ANTICLINE ANTICLINE 4 LEBAH EMAS-1 oil (hinge play) 2025 wildcat BEKANTAN-1 shallowest oil Group D–E (2018) BUNGA TASBIH-1 oil (Group E) MBR+ 2024 PUTERI BASEMENT-1 oil (Group E) FRACTURED GRANITE 2020 basement play ~700 m TITIWANGSA / MAIN RANGE coast ~80 m ~100 m PENINSULAR MALAYSIA Main Range granite · onshore WESTERN HINGE LEBAH EMAS-1 new play · 2025 BASIN AXIS Deep depocentre · 10–12 km DULANG / BEKANTAN Group E oil · proven play ANGSI / BUNGA TASBIH Group E oil · MBR+ 2024 PUTERI BASEMENT Fractured granite · 2020 0 75 150 225 300 400 ~500 km HORIZONTAL SCALE · KILOMETRES 0 −1 −2 −3 −4 −5 −6 −7 −8 −9 −10 km DEPTH (km) VERTICAL EXAGGERATION ~32× · SRTM TOPOGRAPHY + GROUP A→M STRATIGRAPHY · STRUCTURES INTERPRETIVE LEGEND Grp A (Plio.) Grp B–C (Mio.) Grp D (res.) Grp E (Dulang) Grp F (seal) Grp H Grp I (siltst.) Grp J Grp K (deep) Grp L/M (src) Granite bsmt Fract. granite Inversion thrust Normal fault Anticline (proven) Hinge fault (new) Oil Gas Basement oil Well stick PROVEN PLAY Middle Miocene Anticline (E/F/H/I) EMERGING Western Hinge (2025) Strat pinchout (H/I) FRONTIER Fractured granite N S W E SE NW SOURCES · SRTM (Open-Meteo) · PETRONAS GROUP A–M (MADON 2013) · TJIA 1989 · SCHERER 2018 · ISHLAH 2015 · FOUNDER WELLS (SOVEREIGN CANON, F10)

Tectonic Phases · 4 Acts

  • L. Eoc.Syn-rift — Group L/M lacustrine fill, source rocks deposited
  • E. Mio.Transition / sag — Group K, J, I fluvial-deltaic
  • M–L. Mio.Inversion — normal faults reverse, anticlines form
  • Plio–Rec.Post-inversion — regional subsidence, marine transgression

Reservoir Quality · Group A→M

  • Group D: Claystone, sandstone, coal · Deltaic · Excellent
  • Group E: Sandstone (Dulang field) · Excellent
  • Group F: Sandstone, claystone, coal · Good + regional seal
  • Group H: Lower coastal plain · Excellent–Good
  • Group I: Siltstone (Angsi, Sotong) · Good
  • Group K: Coarse sandstone · Deep play · Fair
  • Porosity: 12–28% · Perm: 10–1000 mD

Founder Wells (4) · Plays Tested

  • LEBAH EMAS-1 — Western Hinge · 2025 · new play fairway
  • BEKANTAN-1 — Central basin · 2018 · shallowest oil
  • BUNGA TASBIH-1 — Angsi flank · 2024 · MBR+ field
  • PUTERI BASEMENT-1 — Eastern flank · 2020 · fractured granite

Provenance · Group A→M

  • Stratigraphy: Madon 2013, Ishlah 2015, PETRONAS convention
  • Tectonics: Tjia 1989 (inversion), Madon 2013 (sag)
  • Plays: Scherer 2018 (anticline), PETRONAS MPM 2024 (MBR+)
  • Wells: /earth/data/wells.json (sovereign canon, F10)
  • F7 humility: body shapes are schematics, well positions are basin-level not step-out
Cross-section · SRTM topography via open-meteo.com · Stratigraphy from PETRONAS Group A–M convention · Tectonics from Cenozoic failed rift + Miocene inversion · Vertical exaggeration ~32×. F7 humility: body shapes are interpretive schematics, not seismic picks.
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