Sumatra, Sunda Shelf, Natuna - Bibliography of Indonesia Geology

(C Sumatra fore-arc Singkel and Pini subbasins eleven Neogene sequences. In Miocene- E Pliocene, two
subbasins subsided independently. Initial subsidence of Singkel Basin from lateral translation of structural
block between Batee and Singkel faults. Regional basin subsidence from deflection of descending oceanic plate,
created when material was added to and/or redistributed in accretionary wedge. Structural influences on forearc
basin subsidence: (1) location of continental margin; (2) presence of strike-slip faults traversing fore arc;
and (3) local and regional deformation within accretionary wedge)
Maulana, E., A. Sudarsana & S. Situmeang (1999)- Characterization of a fluvial oil reservoir in the Lemat
Sandstone (Oligocene), Puyuh Field, South Sumatra Basin. Proc. 27th Ann. Conv. Indon. Petrol. Assoc., p. 83-
104.
(Puyuh Field produces oil from thick Lemat Sst in four-way dip closure. Basal Lemat deposits reddish brown
shale unconformably over pre-Tertiary metasediment and volcanics. Reservoir sands thin updip and shale out
before reaching Bertak and Kubu. Nested fluvial channels in N-S trending depocenter on W flank of field..
Updip pinchout of deeper sand forms separate stratigraphic trap. High net-to-gross (50-80%) and excellent
reservoir quality (av. perm. 300 md, 19% porosity). Sands mainly quartz with some lithics and feldspar. Clay
content 8-15%. Oil lacustrine origin, 28° API gravity and requires blending with lighter oil for transportation)
Mazumder, S., I.B. Sosrowidjojo & A. Ficarra (2010)- The Late Miocene Coalbed Methane system in the South
Sumatra Basin of Indonesia. In: SPE Asia Pacific Oil and Gas Conf., Brisbane 2010, 29 p.
(Review of S Sumatra coalbed methane (CBM) potential. Basin ranked high, but well testing still in earliest
stages. Late Miocene Muara Enim Fm >3500 ft of paralic clastics, with 10-15 thick coal seams. Coals thickest
and most numerous in SW half of basin (Lematang Depression, C Palembang sub-basin). Coals eroded over
anticlines. Coals sub-bituminous rank)
McArthur, A.C. & R.G. Helm (1982)- Miocene carbonate buildups, offshore North Sumatra. Proc. 11th Ann.
Conv. Indon. Petrol. Assoc., 1, p. 127-146.
(Seismic mapping revealed >70 E-M Miocene Belumai Fm carbonate buildups in Mobil North Sumatra
offshore area (NSO). Four oil and four gas discoveries from 12 wildcats. First gas discovery NSB-A1 in 1972.
Most buildups are pinnacle-like reefs, with up to 1,100 feet of relief and 3,000 acres of areal closure, located on
basement highs. Gas up to 1.5% H2S and 31% C02. High gravity, low pour point oil in NSB-L1 well)
McCaffrey, R. (1991)- Slip-vectors and stretching of the Sumatra fore arc. Geology 19, p. 881-884.
(Thrust earthquakes at Java trench SW of Sumatra suggest Sumatra fore arc translated to NW by oblique plate
convergence. NW motion of forearc rel. to SE Asia increases from zero at Sunda Strait to 45-60 mm/yr in NW
Sumatra)
McCaffrey, R. (1996)- Estimates of modern arc-parallel strain rates in fore arcs. Geology 24, 1, p. 27-30.
McCaffrey, R. (1996)- Slip partitioning at convergent plate boundaries of SE Asia. In: R. Hall & D. Blundell
(eds.) Tectonic Evolution of Southeast Asia. Geol. Soc. Spec. Publ. 106, p. 3-18.
McCaffrey, R. (2009)- The tectonic framework of the Sumatran subduction zone. Ann. Rev. Earth Planet. Sci.
37, p. 345-366.
(Well-illustrated overview of Sumatra subduction zone and earthquakes)
McCaffrey, R., P.C. Zwick, Y. Bock, L. Prawirodirdjo, J.F. Genrich, C.W. Stevens, S.S.O. Puntodewo & C.
Surabaya (2000)- Strain partitioning during oblique plate convergence in northern Sumatra: geodetic and
seismologic constraints and numerical modeling. J. Geophys. Res. 105, B12, p. 28,363-28,376.
(GPS measurements along subduction zone of N Sumatra (2°S to 3°N) reveal oblique convergence strain
partitioned between trench-normal contraction in forearc and trench-parallel shear strain in few tens of km of
Sumatran fault. Volcanic arc can help partitioning by localizing margin-parallel shear strain in upper plate if
weaker than its surroundings. Highest coupling on plate boundary beneath and seaward of forearc islands,
consistent with rupture zones large earthquakes there)
Bibliography of Indonesia Geology v. 4.1 64 www.vangorselslist.com July 2012