Ron Noble

Diterpanes occur widely in the resins of modern conifers, suggesting that sedimentary diterpanes are chemical markers for fossil resins, particularly those derived from conifers. In this paper, the use of the relative abundance of these chemical fossils for establishing genetic relationships between the organic matter in sediments and crude oils has been demonstrated using sediments and crude oils from the Gippsland Basin.The crude oils were characterised by their remarkably uniform distributions of diterpanes and similar relative amounts of diterpanes and hopanes. In contrast, the sediments showed much greater variability, with only one sediment horizon, an organic-rich shale, showing the same properties as the crude oils.

The transformations of complex molecules of biological origin, biological marker compounds, are being used increasingly to provide information about the processes affecting organic matter in geological envir~ nments.~-~ Studies of saturated steroid and ...

... Rohinton Noble,a John Knox,a Robert Alexander,*b and Robert Kagib a Department of Organic Chemistry ... Cosmochim. Acta, 1983,47, 1531. 4 F. R. Aquino Neto, JM Trendel, A. Restle, J. Connan, and P. Albrecht, in 'Advances in Organic Geochemistry 1981,' eds. ...

Advances in Organic Geochemistry 1985 Org. Geochem. Vol. 10. pp. 825-829, 1986 Printed in Great Britain. All rights reserved 0146-6380/86 S3.00 + 0.00 Copyright 0 1986 Pergamon Journals Ltd Identification of some diterpenoid hydrocarbons in petroleum ROHINTON A. NOBLE*, ...

Tetracyclic diterpenoid hydrocarbons (diterpanes) based on the ent-beyerane, phyllocladane and ent-kaurane skeletons have been identified in the hydrocarbon extracts of some Australian coals, sediments and crude oils. Structures were assigned to the geological diterpanes by ...

... Research, Houston, Texas 77252-2189. Birthe J. Schmidt. Statoil, 4035 Stavanger, Norway. Rohinton A. Noble. Arco E&P Technology, Plano, Texas 75023. Energy Fuels , 1996, 10 (1), pp 49–59. DOI: 10.1021/ef950142s. Publication ...

An amplitude anomaly within the Pliocene section was identified by BHP Billiton on vintage 2D and 3D seismic data in permit SC-41 of the Philippine Sandakan Basin. Reprocessing of the 3D data in 2003 allowed detailed mapping of the anomaly showing that it extended over several levels on a number of adjacent fault blocks. The anomalies were named "Zebra" because of the striped pattern in cross-sectional view. In-house lithology and fluid prediction (LFP) software indicated that hydrocarbons would have no AVO response within this section and that seismic amplitude would be the only fluid discriminator. Quantitative analysis using rock physics data from wells within the permit was attempted and it appeared that this should give reasonably reliable results, despite only one well having actually penetrated similar Pliocene-age clastics. This pre-drill analysis strongly suggested that the amplitudes were a result of hydrocarbons, probably gas but possibly oil, in stacked reservo...

Abstract Detailed seismic structural analysis of the Terang-Sirasun feature, offshore Bali, has revealed a complex history of alternating long-term subsidence and episodic uplift. These fluctuations have had a significant impact on gas volume expansion and gas producibility due to differences in drainage rather than imbibition reservoir saturation history. A drainage rather than imbibition saturation history should significantly improve total ultimate production from this reservoir. The Sirasun structure was charged very late and is filled with biogenically sourced gas. The bulk of the gas volume entered the trap since the initiation of the ongoing period of uplift, and charge continues at present. Although the structure overall has subsided since the Late Cretaceous, this subsidence has been punctuated by periods of pronounced uplift, with the initial phase of uplift occurring in the early Miocene, and additional phases in the Plio-Pleistocene and present. Mapping of truncated seismic reflections around the crest of the Terang-Sirasun structure indicates that more than 1,000 feet of uplift has occurred during the last 1.5 mybp (million years before present) and that the bulk of that uplift is due to the current phase of inversion. The current uplift is causing the biogenic gas to expand and displace water within the transition zone and at the gas water contact (GWC). Because the expanding gas is displacing water, the reservoir's saturation history is due to drainage conditions. A gas pool which has experienced a drainage saturation history will result in reduced water production, a higher initial gas saturation, and larger recoverable gas volumes as compared to a pool that has experienced an imbibition saturation history. ARCO's previous reservoir model was calibrated to imbibition, consistent with a depositional model that involved continuous subsidence over the life of the gas volumes. ARCO's new depositional model that involves episodic uplift and a drainage saturation history therefore should result in improved reservoir performance.

Abstract Onshore and offshore sub-basins of Northwest Java contain at least ten active petroleum systems which have given rise to more than 150 separate oil and gas fields. The expected ultimate reserves of the region amount to over 4 BBOE, which represents about 14 BBOE in-place. Onshore Java sub-basins within the study area include the Ciputat, Kepuh, Pasir Bungur, Cipunegara/E15 Graben and Jatibarang. Oil and gas originating from these sub-basins have migrated through onshore structural highs, and onward in a northerly direction towards the offshore Northwest Java (ONWJ) region. Petroleum systems located within offshore sub-basins include the South Ardjuna, Central Ardjuna, Sunda, Yani/North Seribu Trough and Asri systems. In this paper, the ten major petroleum systems of Northwest Java have been characterized in terms of the type of source rock migration/carrier bed system, major reservoir and seal units, and style of entrapment. Results from each system are compared and contrasted to account for the relative volumes of hydrocarbons found to date, and the oil versus gas distribution of each system.

... Thomas L. Phillips1, Ron A. Noble2, Frank F. Sinartio3. Abstract. The Pagerungan gas field was discovered by ARBNI in 1985. ... In the ten year period 1980-1990 15,000 kilometers of seismic were acquired and 17 wells were drilled: 12 new field wildcats and 5 delineation wells. ...

Indonesia contains many Tertiary basins, several of which have proven to be very prolific producers of oil and gas. The geology and petroleum systems of these productive basins are reviewed, summarized and updated according to the most recent developments. We have linked the recognized petroleum systems to common stages in the geological evolution of these synrift to postrift basins and classified them accordingly. We recognize four Petroleum System Types (PSTs) corresponding to the four main stages of geodynamic basin development, and developed variably in the different basins depending on their depositional environment history: (i) an oil-prone Early Synrift Lacustrine PST, found in the Eocene to Oligocene deeper parts of the synrift grabens, (ii) an oil and gas-prone Late Synrift Transgressive Deltaic PST, located in the shallower Oligocene to early Miocene portions of the synrift grabens, (iii) a gas-prone Early Postrift Marine PST, characteristic of the overlying early Miocene transgressive period, and (iv) an oil and gas-prone Late Postrift Regressive Deltaic PST, forming the shallowest late Tertiary basin fills. We have ascribed the petroleum systems in each of the basins to one of these types, recognizing that considerable mixing of the predominantly lacustrine to terrestrial charge has taken place. Furthermore, we have grouped the basins according to their predominant PSTs and identified ''basin families'' that share important aspects of their hydrocarbon habitat: these have been termed proximal, intermediate, distal, Borneo and eastern Indonesian, according to their palaeogeographic relationship to the Sunda craton of Southeast Asia.