Early deepwater drilling results from a new exploration play, offshore West Sulawesi, Indonesia

Bacheller, John; Buck, Steven P.; Cahyono, Agung Budi; Polis, Stephen R.; Helsing, C. Edward; Zulfitriadi,; Man, Ellen M. De; Hillock, P.; Ruf, Amy S.; Toxey, Jeffrey K.

doi:10.29118/ipa.391.11.g.243

Cited by 3 publications

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“…Tectonostratigraphy of the Makassar Straits (modified fromBacheller III et al, 2011) Palinspastic reconstructions and present-day geoseismic cross section through well K-1. Location of section shown inFigure 1…”

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confidence: 99%

Palaeofacies and biomarker characteristics of Paleogene to Neogene rocks in the Makassar Straits, Indonesia

et al. 2019

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Borehole K-1 is an exploratory well that was drilled in the North Makassar Basin (West Sulawesi) in 2011. Gas chromatography (GC) and gas chromatography-mass chromatography (GC-MS) analyses have been conducted on extracts from well cuttings from the Paleogene to Neogene interval in order to investigate the characteristics of biomarkers present. Although the well was drilled with oil-based mud and gas chromatographic analysis reveals that the alkane fractions are heavily contaminated, detailed investigation of biomarkers in these rock extracts and comparison with biomarkers in the oil-based mud has revealed that, while there are hopane and sterane biomarkers in the mud, there are also a discrete set of biomarkers that are indigenous to the rocks. These include oleanane, bicadinanes, taraxastane and other higher-plant-derived triterpanes. The presence of these compounds in environments that range from bathyal to marginal marine and even to lacustrine, shows the extent of reworking of terrestrial material into aquatic settings in this region during the Paleogene and Neogene and provides further evidence of a predominance of terrestrial material, even in deep-marine settings, with little ‘in-situ’ material noted. These findings have important implications for the use of biomarkers as indicators of palaeoenvironment in both source rocks and oils.

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confidence: 99%

Palaeofacies and biomarker characteristics of Paleogene to Neogene rocks in the Makassar Straits, Indonesia

et al. 2019

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“…This is consistent with those encountered in the late Middle Eocene section in Kaluku-1 well to the north. A sudden intra-Late Eocene transgression was observed in Kris-1 though no significant subsidence in Late Eocene times in Sultan-1 has been reported (Bacheller III et al, 2011;and Lunt and van Gorsel, 2013).…”

Section: Middle Eocene Palaeogeography and Source Rock Distributionmentioning

confidence: 92%

“…To the east, ExxonMobil drilled Rangkong-1 well (dry) in 2009 (Bacheller III et al, 2011;and Satyana et al, 2012). The well encountered sediments of latest Middle Eocene overlying unaltered volcanic paleobasement high.…”

Section: North Makassar Basinmentioning

confidence: 99%

“…ExxonMobil drilled Sultan-1 in 2009 and Kris-1ST in 2010 (Bacheller III et al, 2011;and Satyana et al, 2012). Sultan-1 well penetrated thick Middle Eocene to Late Oligocene pinnacle reef carbonates sitting on the older, non-marine pyroclastic volcanics horst.…”

Section: South Makassar Basinmentioning

confidence: 99%

“…Sultan-1 well penetrated thick Middle Eocene to Late Oligocene pinnacle reef carbonates sitting on the older, non-marine pyroclastic volcanics horst. The top of the pinnacle reef contains a 102 m column of 97% methane gas but uneconomic (Bacheller III et al, 2011). The gas could be biogenic in nature.…”

Section: South Makassar Basinmentioning

confidence: 99%

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Middle Eocene Palaeogeography of the Greater Makassar Strait Region, Indonesia: A Review of Eocene Source Rock Distribution

Argakoesoemah¹

Proc. Indon. Petrol. Assoc., 41st Ann. Conv., 2017

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Tectono‐Stratigraphic Controls on Cenozoic Southeast Asian Carbonates

Lunt

Woodroof²

2023

Cenozoic Isolated Carbonate Platforms—Focus Southeast Asia

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In Southeast Asia, Cenozoic carbonates commonly were initiated or terminated at times of tectonic change, and they are bound by unconformities. A review of the timing of several of the largest unconformities shows they correlate over wide areas. These unconformities divide the stratigraphic record of Sundaland into episodes, with times of rapid basinal re-adjustment separated by periods of relative stasis. These generalizations are true not only in the successions deposited during the dominantly extensional later Eocene to early Miocene, but also in the often-compressional middle Miocene and younger deposits, in which at least three phases of rapid tectonic and stratigraphic change can be correlated over multiple depocenters. A detailed review of many areas of Southeast Asia using quantitative biostratigraphic methods indicates that tectonism resulted in relative changes in sea level, with no indication that eustasy was an important driving force. The boundaries between these sedimentary episodes vary in their effect and distribution, depending upon the tectonic cause. As a consequence, there is no uniform subdivision of the stratigraphic record across the region, which precludes a simple Sundaland-wide classification of primary sedimentary sequences. This review concentrates on both event timing and rates of change within and between basins, especially those changes that initiated or terminated carbonate deposition. In addition, some short-lived carbonate buildups that developed during transitional periods are described. This review provides the beginnings of a new stratigraphic framework for the Cenozoic carbonates and related deposits of Southeast Asia. It requires an inductive analytical methodology, in contrast to the model-driven and deductive approaches that have been applied in recent years. This episodic stratigraphy approach includes integration of large amounts of analytical data, for which the Cenozoic tropical sediments of Southeast Asian basins are particularly well suited.

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Early deepwater drilling results from a new exploration play, offshore West Sulawesi, Indonesia

Cited by 3 publications

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Palaeofacies and biomarker characteristics of Paleogene to Neogene rocks in the Makassar Straits, Indonesia

Palaeofacies and biomarker characteristics of Paleogene to Neogene rocks in the Makassar Straits, Indonesia

Middle Eocene Palaeogeography of the Greater Makassar Strait Region, Indonesia: A Review of Eocene Source Rock Distribution

Tectono‐Stratigraphic Controls on Cenozoic Southeast Asian Carbonates

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