Temporal controls and resulting variations in Oligo-Miocene carbonates from the East Java basin, Indonesia: examples from the Cepu area

White, James V.; Derewetzky, Aram N.; Geary, Geoff C.; Hohensee, V. Kurt; Johnstone, E.M.; Liu, Chengjie; Pierce, Andrew; Stevens, Jill

doi:10.29118/ipa.1393.07.g.106

Cited by 3 publications

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“…Significantly lower proportions have been discovered in foreland (2%) settings, with intra-arc and fore-arc reserves together totalling only 1%. This weighting will change as reserves are integrated from new finds in the backarc carbonates of NE Java, where recent discoveries are said to rank among the largest made in Indonesia over the past 20 years (Ngimbang and Kujung Formations;Johansen, 2003;Carter et al, 2005;Maynard and Morgan, 2005;Cahyono and Burgess, 2007;White et al, 2007;Doust and Noble, 2008). In-place reserves in NE Java have been reported at 18 BBOE (Satyana and Djumlati, 2003).…”

Section: Tectonic Setting and Carbonate Reservoirsmentioning

confidence: 99%

Tectonic Influences on SE Asian Carbonate Systems and their Reservoir Development

Wilson¹,

Hall²

2010

Cenozoic Carbonate Systems of Australasia

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SE Asian carbonate formations have been reviewed with the aim of understanding the influence of tectonics on their development and reservoir potential through the Cenozoic. Regional tectonics, via plate movements, extensional basin formation, and uplift, was the dominant control on the location of carbonate deposits. These processes controlled the movement of shallow marine areas into the tropics, together with their emergence and disappearance. Although ; 70% of the 250 shallow marine carbonate formations in SE Asia were initiated as attached features, 90% of economic hydrocarbon discoveries are in carbonate strata developed over antecedent topography, of which more than 75% were isolated platforms. Faulted highs influenced the siting of nearly two thirds of carbonates developed over antecedent topography. Around a third of carbonate units formed in intra-and interarc areas; however, economic reservoirs are mainly in backarc and rift-margin settings (; 40% each). Carbonate edifices show evidence of syntectonic sedimentation through: (1) fault-margin collapse and resedimentation, (2) fault segmentation of platforms, (3) tilted strata and differential generation of accommodation space, and (4) modification of internal sequence character and facies distribution. The demise of many platforms, particularly those forming economic reservoirs, was influenced by tectonic subsidence, often in combination with eustatic sea-level rise and environmental perturbations. Fractures, if open or widened by dissolution, enhance reservoir quality. However, fracturing may also result in compartmentalization of reservoirs through formation of fault gouge, or fault leakage via compromised seal integrity. This study will help in reservoir prediction in complex tectonic regions as the petroleum industry focuses on further exploration and development of economically important carbonate reservoirs.

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Section: Tectonic Setting and Carbonate Reservoirsmentioning

confidence: 99%

Tectonic Influences on SE Asian Carbonate Systems and their Reservoir Development

Wilson¹,

Hall²

2010

Cenozoic Carbonate Systems of Australasia

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“…A carbonate platform that forms important hydrocarbon fields developed in southern part of the NEJP, in which: (i) pinnacle reefs in the inner platform; and (ii) barrier reefs along the shelf edge were formed (Figure b; Satyana & Djumlati, ). Recent studies on the isolated platform (Hakiki, Sekti, Simo, Fullmer, & Musgrove, ; Sharaf, BouDagher‐Fadel, Simo, & Carroll, ; Sharaf, Simo, Carroll, & Shields, ; Simo et al, ; White et al, ) showed that development of the carbonate platform was also influenced by relative sea level changes including a significant drop in sea level at the Oligo‐Miocene boundary, called the Mi‐1 event related with Antarctic ice‐volume expansion (Paul, Zachos, Flower, & Tripati, ; Zachos, Shackleton, Revenaugh, Pälike, & Flower, ). The global drop in sea level also resulted in diagenetic alteration of the carbonate sediments in the NEJB (Hakiki, Musgrove, Varnai, Ditya, & Sapardina, ; van‐Simaeys et al, ; Zeiza, van‐Simaeys, Musgrove, Sekti, & Hakiki, ), potentially influencing the petrophysical properties of the carbonate reservoir.…”

Section: Introductionmentioning

confidence: 99%

Depositional and diagenetic history of limestones and dolostones of the Oligo‐Miocene Kujung Formation in the Northeast Java Basin, Indonesia

et al. 2019

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Lithological and geochemical features of platformal carbonates record the signatures of the global climates and the regional environmental settings and also reconstruct the diagenetic history and porosity evolution, which are essential to evaluate the potential of hydrocarbon reservoirs. This study investigates the platformal carbonates of the Oligo-Miocene Krunji Formation of North East Java Basin, which are potentially significant hydrocarbon reservoirs. The carbonate sequence in a 283 m thick section at Kranji in East Java is subdivided into three lithological units: limestone unit 1, dolostone unit 2, and limestone unit 3, in ascending order. The strontium-isotope ratios of well-preserved calcite samples indicate the depositional period from Chattian (late Oligocene) to Burdigalian (early Miocene), which is consistent with ages of the foraminifer assemblages. Unit 1 consists of low-porosity limestone, in which two horizons of subaerial exposure are recognized by the occurrence of red-colored matrix and lower δ 13 C values. Unit 2 consists of dolomitic rock and exhibits coarse-grained calcitic grains and cross-stratified structure. Considering that this unit has been subject to dolomitization, the sediment of unit 2 was initially permeable and was likely deposited in a shoal setting. The overlying unit 3 of Aquitanian-Burdigalian age is characterized by a highly granular texture. High porosity and uniformly low δ 13 C and δ 18 O values indicate that Unit 3 was subjected to more intense meteoric diagenesis than the Chattian unit 1. This was likely a consequence of the Antarctic ice-sheet expansion during the Oligocene/Miocene transition, which amplified sea level change. The unit 2 dolomite has high δ 13 C and δ 18 O values and a high 87 Sr/ 86 Sr ratio which resulted from the reflux of seawater into permeable the sediment body in middle-late Miocene (Burdigalian Tortonian) following the deposition of unit 3. The porosity and permeability of the Kujung Formation were initially controlled by sedimentological processes, but largely modified by later diagenetic processes. K E Y W O R D S carbonate diagenesis, carbonate sedimentology, dolomite, Microcodium, North East Java Basin, Oligocene-Miocene

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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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Temporal controls and resulting variations in Oligo-Miocene carbonates from the East Java basin, Indonesia: examples from the Cepu area

Cited by 3 publications

References 0 publications

Tectonic Influences on SE Asian Carbonate Systems and their Reservoir Development

Tectonic Influences on SE Asian Carbonate Systems and their Reservoir Development

Depositional and diagenetic history of limestones and dolostones of the Oligo‐Miocene Kujung Formation in the Northeast Java Basin, Indonesia

Tectono‐Stratigraphic Controls on Cenozoic Southeast Asian Carbonates

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