The reservoir potential of Globigerinid sands in Indonesia

Modeling study of growth and potential geohazard for LUSI mud volcano: East Java, Indonesia

“…The mudstone of the Kalibeng Formation is over-pressured in most parts of the basin where rapid pressure transition occurs. The high sedimentation rate, rapid deposition and burial of thick shale in the depocenters that occurred during Pliocene and Pleistocene have resulted in zones of under-compacted shales (Willumsen and Schiller, 1994;Schiller et al, 1994). This highly plastic zone is over-pressured due to the presence of excessive trapped water and maturing organic rich materials.…”

The LUSI mud volcano triggering controversy: Was it caused by drilling?

“…The overpressure is due to high sedimentation rates in a rapid subsidence and burial basin (Willumsen and Schiller, 1994;Schiller et al, 1994) and maturation of the organic materials. The East Java geosyncline has thick Tertiary sediments of more than 6000 m (Koesoemadinata, 1980) with an estimated sedimentation rate of 2480 m/ma in the vicinity of LUSI (Kadar, 1986).…”

Mud Volcano and Its Evolution

“…Its location is in the Southern part of the hydrocarbon prolific East Java inverted back-arc Basin which was formed during the Oligocene-Early Miocene (Sribudiyani et al, 2003), on the Eastern tip of the Kendeng Zone (De Genevraye and Samuel,1972). The Geology of the area is characterized by the rapid deposition of thick organic rich sediment as part of the Brantas delta, influenced by the extensional tectonic regime (Willumsen andSchiller, 1994, Schiller et al, 1994). Due to the rapid deposition, shales in the area are undercompacted and overpressured (Mazzini et al, 2007).…”

“…The East Java geosyncline has thick Tertiary sediments of more than 6000 m (Koesoemadinata, 1980) with an estimated sedimentation rate of 2480 m/ma in the vicinity of LUSI (Kadar et al,1997). The high sedimentation rates followed by rapid subsidence caused non-equilibrium compaction, and along with the maturation of organic materials resulted in the overpressured sediments within the Kendeng zone (see Willumsen and Schiller, 1994;Schiller et al, 1994). The overpressured sediments were later compressed, become mud diapirs and pierced the overlying sediments in many parts of East Java as mud volcanoes.…”