Quartz cementation and reservoir quality of the Plover sandstone in the Abadi gas field

Matsui, Ryoichi; Shinbo, Emiko; Omokawa, Mamoru; Zushi, Takahiro

doi:10.29118/ipa.1315.09.g.157

Cited by 4 publications

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“…The Sunrise-Troubadour gas field was discovered in approximately 1974-1975 with 8.4 trillion cubic feet (TCF) of proved and probable recoverable reserves, and this discovery was followed by another successful gas discovery of the Evans Shoal in 1988 with 6.6 TCF of proved and probable recoverable reserves (Nagura et al 2003). These significant resources have been confirmed in the Jurassic Plover interval (Matsui et al 2009). …”

Section: Introductionmentioning

confidence: 77%

“…Similar to gas fields discovered in Australian territory, the Jurassic Plover interval was also shown to be the main reservoir target. This interval is characterised by highly matured sandstone with quartzose composition (Nagura et al 2003;Matsui et al 2009) of typically shallow marine origin (Matsui et al 2009). Marine shales deposited contemporaneously with the Plover formation are also postulated as primary source rocks for the Abadi gas field (Nagura et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Triassic petroleum system as an alternative exploration concept in offshore western Timor Indonesia

Surjono

Hidayat

Wagimin³

2017

J Petrol Explor Prod Technol

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Located in the north-western part of Bonaparte Basin, offshore western Timor presents the opportunity for a distinct exploration concept due to the discovery of the Abadi gas field. A classic Jurassic petroleum play did not develop as a proven reservoir and source rock in the study area due to severe erosion during the Valanginian event. Therefore, the Triassic interval requires assessment to reveal an alternative petroleum system in the study area. A petroleum system analysis utilising 2D seismic lines and three exploration wells was performed to construct a new exploration concept. The study showed that the Scythian Mount Goodwin interval could be considered a primary gas-prone source rock, with type II/III kerogen, a total organic content up to 2.09% and a hydrogen index that could reach 569 mg/g. Based on a study of a pseudo-well conducted here, the Mount Goodwin interval is found to have reached gas generation in the Early Cretaceous and expulsion in the Early Eocene. The potential reservoir rocks are the Carnian-Ladinian Challis and Anisian Pollard intervals. The Challis interval, the primary reservoir, has typical shoreline sandstones and is interbedded with claystones and limestone intercalations. Petrophysical and petrographic studies in this interval indicate good reservoir properties. However, the Pollard interval mainly consists of carbonates with minor claystones and has a low quality of reservoir properties. The intraformational shale of the Challis is considered as the potential regional seal, especially within areas that are not truncated by the Valanginian event. From the perspective of exploration, the Jurassic north-east-south-west-tilted fault blocks are still favourable for new discoveries in the offshore western Timor area.

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Section: Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Triassic petroleum system as an alternative exploration concept in offshore western Timor Indonesia

Surjono

Hidayat

Wagimin³

2017

J Petrol Explor Prod Technol

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Pedaro formation, equivalent of Plover sandstone at Savu Island, Outer Banda Arc

Santy

Widiatama

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Plover Sandstone have been widely known as a good quality of oil and gas reservoir in NW Australia. As the continuity of NW Australia margin, outer Banda Arc become the distribution area of the equivalent of Plover Sandstone units. Therefore, a clear distinction and characterization of equivalent of Plover Sandstones distributed in this area is needed. Thick unit of quartz rich sandstone is scrap out in south Savu Island. Refers to the location where the lithology is found widely distributed, the unit is suggested to be called as Pedaro Formation. The characteristic of the lithology is determined through detailed measured section from two trajectories and laboratory analysis, including fourteen samples of petrography analysis, eight samples of Scanning Electron Microscope (SEM) analysis, and three samples of X-Ray Difraction (XRD) analysis. The lower part of the unit is initiated by braided fluvial conglomerates which gradually become tidal sand flat association of shale layers, coal seams and sandstone insertion. While the upper part of the unit is consisting of thick bedded quartz sandstone with thin siltstone insertion, deposited in the shoreface environment. Those facies association developed at transgressive conditions in the estuarine environment. The characteristic of the sandstone unit of Pedaro Formation is thickly bedded quartz wacke to quartz arenite, white to light grey in color, moderately to very well sorted, mostly mature sand. Pedaro Formation is identified to be deposited at Early Jurassic in interior craton tectonic setting. The characterization of sandstone unit of Pedaro Formation is showing that the unit can be correlate to the equivalent of Plover Sandstone found in Timor. Sandstone unit of Pedaro Formation can play a role as reservoir candidate in petroleum system of Savu and surrounding area.

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Petrographic approach for reservoir characterization of a deep-water sandstone in a giant gas-condensate field, Browse Basin, Western Australia

Yamamoto

Coelho

Jones

et al. 2022

Second International Meeting for Applied Geoscience &Amp; Energy

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Quartz cementation and reservoir quality of the Plover sandstone in the Abadi gas field

Cited by 4 publications

References 0 publications

Triassic petroleum system as an alternative exploration concept in offshore western Timor Indonesia

Triassic petroleum system as an alternative exploration concept in offshore western Timor Indonesia

Pedaro formation, equivalent of Plover sandstone at Savu Island, Outer Banda Arc

Petrographic approach for reservoir characterization of a deep-water sandstone in a giant gas-condensate field, Browse Basin, Western Australia

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