PBDB Collection

Arun Field, Sumatra (Miocene of Indonesia)

Also known as Reef 787

Where: Indonesia (5.1° N, 97.3° E: paleocoordinates 2.7° N, 100.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Early/Lower Miocene (23.0 - 16.0 Ma)

• middle Lower Miocene, perhaps ranging into middle Miocene

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

• The Arun field is a giant gas-condensate field operated by Mobil and Pertamina with over 20,000 acres of closure at the top of the Arun reservoir.

• A middle-shelf patch reef complex of early to middle Miocene age is the producing facies at the Arun field. About 1,100 ft of porous limestones, encased in shales, create a stratigraphic trap for overpressured hydrocarbons. Three main carbonate lithologies were encountered during the examination of over 4,300 ft of core: (1) a reef facies consisting of vuggy, coral encrusting, red-algal boundstones, (2) a near-reef facies consisting of foraminiferal, mixed-skeletal packstones with gravel-size coral fragments, and (3) an interreef lagoonal facies consisting of benthonic-foram packstones.

Size class: macrofossils

Collection methods: core, peel or thin section,

Primary reference: C. F. Jordan, Jr. and M. Abdullah. 1992. Arun Field Indonesia, North Sumatra Basin, Sumatra. In N.F. Foster and E.A. Beaumont (eds.), Atlas of Oil and Gas Fields, Stratigraphic Traps III, AAPG, Treatise of Petroleum Geology 1-39 [W. Kiessling/W. Kiessling/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 86769: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 17.02.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Bivalvia
Pholadida - Teredinidae	Kuphus sp. Kuphus sp. Guettard 1770 clam calcified tube around the siphon
Anthozoa
Scleractinia - Diploastraeidae	Diploastrea heliopora Diploastrea heliopora Lamarck 1816 stony coral secondary reef builder
Scleractinia - Pocilloporidae	Stylocoeniella guentheri Stylocoeniella guentheri Bassett-Smith 1890 stony coral major reef builder
Scleractinia - Acroporidae	Acropora sp., Alveopora ailingi, Alveopora fenestrata, Astreopora myriophthalma, Montipora hispida Acropora sp. Oken 1815 stony coral several species, major reef builder Alveopora ailingi stony coral accessorial reef builder Alveopora fenestrata Lamarck 1816 stony coral secondary reef builder Astreopora myriophthalma Lamarck 1816 stony coral major reef builder Montipora hispida Dana 1846 stony coral accessorial reef builder
Scleractinia - Poritidae	Goniopora stuchburyi, Porites sp., Porites cf. lutea, Porites solida Goniopora stuchburyi stony coral secondary reef builder Porites sp. Link 1807 stony coral secondary reef builder Porites cf. lutea Milne-Edwards and Haime 1851 stony coral major reef builder Porites solida Forskal 1775 stony coral secondary reef builder
Scleractinia - Agariciidae	Leptoseris hawaiiensis, Pavona varians Leptoseris hawaiiensis Vaughan 1907 stony coral secondary reef builder Pavona varians Verrill 1864 stony coral accessorial reef builder
Scleractinia - Euphylliidae	Galaxea fascicularis Galaxea fascicularis Linnaeus 1767 stony coral accessorial reef builder
Scleractinia - Lobophylliidae	"Symphyllia nobilis" = Symphyllia recta "Symphyllia nobilis" = Symphyllia recta Dana 1846 stony coral accessorial reef builder
Scleractinia - Merulinidae	"Oulophyllia aspera" = Oulophyllia crispa, Caulastrea sp., Anisocoenia crassisepta, "Favia stelligera" = Goniastrea stelligera, Platygyra sp., "Favia speciosa" = Dipsastraea speciosa, Cyphastrea microphthalma "Oulophyllia aspera" = Oulophyllia crispa Lamarck 1816 stony coral secondary reef builder Caulastrea sp. Dana 1846 stony coral accessorial reef builder Anisocoenia crassisepta Reuss 1867 stony coral accessorial reef builder "Favia stelligera" = Goniastrea stelligera Dana 1846 stony coral secondary reef builder Platygyra sp. Ehrenberg 1834 stony coral accessorial reef builder "Favia speciosa" = Dipsastraea speciosa Dana 1846 stony coral secondary reef builder Cyphastrea microphthalma Lamarck 1816 stony coral major reef builder