Geochemical characterization and source investigation of oils discovered in Khoraghat–Nambar structures of the Assam-Arakan Basin, India

L, None Goswami, B. G.1, R. S. Bisht1, K.; Bisht, Raj Kishor; Bhatnagar, A. K.; Kumar, D. Nagesh; Pangtey, Kusum L.; Mittal, A.K.; Goel, Jagdish P.; Mit, None Datta, G. C.1, R. Sharma1, A.K.; Thomas, N.J.

doi:10.1016/j.orggeochem.2004.08.002

Cited by 23 publications

(5 citation statements)

References 13 publications

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“…Moreover, to add a regional dimension, data on a series of oils from the Assam Province of India, located to the north of the Central Myanmar Depression, are included for comparison. The oil samples from Assam included here are similar in composition to those discussed by Goswami et al (2005) which are interpreted to be generated from the Eocene Barail Formation.…”

Section: Introductionmentioning

confidence: 56%

“…Although a number of parameters, including the presence of 28,30-bisnorhopane and extremely strong predominance of C 29 steranes, distinguish the Assam oils from the oils from Myanmar reported here, there is a close compositional similarity between the oils from the Salin and Chindwin Basins and the Assam oils. The Assam oils are interpreted to have been generated from the Eocene Barail Formation (Goswami et al, 2005), which is of similar age to the presumed source rock of the Salin and Chindwin Basin oils. The similarity may suggest comparable depositional environments controlling Eocene source rock deposition in Assam and Myanmar.…”

Section: Discussionmentioning

confidence: 98%

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Petroleum Geochemistry of Oils From Myanmar – A Preliminary Assessment

Bojesen‐Koefoed

Fyhn

Nytoft

et al. 2021

Journal of Petroleum Geology

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Myanmar has a long history of petroleum production, but little information has so far been published pertaining to the detailed composition of the country's oils. The present paper reports the results of the analysis of a total of 28 Cenozoic oil samples collected from producing fields/wells or natural seepages in the onshore Salin and Chindwin Basins of the Central Myanmar Depression and from Ramree Island in the Rakhine Coastal Belt. In addition, a set of 68 mudstones and coals from four Oligocene -Paleocene formations were collected along the western margin of the Central Myanmar Depression and were analysed for petroleum generation potential. Data on five oil samples from the Assam Province of India, situated to the north of the Central Myanmar Depression, were also included in the study for comparison purposes.Previous studies have suggested that the Eocene succession in the Central Myanmar Depression includes organic-rich source rocks. However, none of the analysed rock samples show any potential for the generation of appreciable amounts of liquid petroleum components. The samples were collected at the basin margin and only cover a small fraction of the succession, and they are probably not therefore representative of the actual source rocks present in deeply buried kitchen areas in the Central Myanmar Depression.The oils from the Central Myanmar Depression appear to have been generated from the same overall source type, which is dominated by terrigenous, higher land-plant -derived kerogen. Several different parameters consistently show clear north-south trends in the Salin Basin with respect to both thermal maturity and source facies. Oils from the Chindwin Basin in the north of the depression can be distinguished from those of the Salin Basin further south using subtle variations in biomarkers. The oils collected from Ramree Island represent a different basin and are easily distinguished in that they are generated from a predominantly marine source rock, albeit one with a significant terrigenous input. However, one sample from Ramree Island was generated from a predominantly terrigenous source, which may suggest the existence of two viable petroleum systems in the Rakhine Coastal Belt or of marked facies variations within the source succession.Oils from the Central Myanmar Depression and the Assam Province of India are remarkably similar, thus suggesting generation from highly similar source rock types, presumably of Eocene age. This could be a result of these two areas being physically connected during the Eocene as suggested by modern plate reconstructions.

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Section: Introductionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 98%

Petroleum Geochemistry of Oils From Myanmar – A Preliminary Assessment

Bojesen‐Koefoed

Fyhn

Nytoft

et al. 2021

Journal of Petroleum Geology

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“…Reservoirs are located in the Bhuban and Barail formations and Miocene and Oligocene age respectively. The carbon isotopic compositions are stable in Khoraghat -Nambar area of the Assam -Arakan Basin, India (Goswami et al, 2005). The oils in the Bokabil Formation (early to middle Miocene) can be correlated across the Khoraghat and Nambar field but the oil from Sylhet formation is different as compared to those in Bokabil formation.…”

Section: Hydrocarbon Potential Of Tripuramentioning

confidence: 96%

“…Kopili rocks have similar source specific parameters to those of the Sylhet oils, whereas genetically Barail rocks are correlatable with the Bokabil oils. There are two petroleum systems in Khoraghat -Nambar area namely, the Barail -Bokabil and the KopiliSylhet (Goswami et al, 2005). The overlying Surma group sediments have relatively low organic contents with TOC values varying from 0.2% to 0.6% as compared to Barail group (Khan et al, 1988).…”

Section: Hydrocarbon Potential Of Tripuramentioning

confidence: 99%

Hydrocarbon Prospectivity in Central Part of Tripura, India, Using an Integrated Approach

Brahma¹,

Sircar²,

Karmakar³

2013

JGG

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In this study an attempt has been made to evaluate the hydrocarbon prospectivity of Central Tripura. The geological factors, surface exposures, geochemical anomalies, seismic expressions have been studied and were correlated with distribution pattern of gas fields in Bangladesh. Discoveries of oil and gas in and around of the study area have been studied and prospects have been analyzed in light of various geological and geophysical risks associated with them. The exploration efforts which were mostly confined to the synclinal areas are now gradually getting shifting towards the anticlines. The integrated study proposed in this study can help us to prepare a road map for exploration in the north east part of India.

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“…Some of the bicadinane and bicadinene products of the Vastan resin are characteristic of dammar resins, produced from the Angiosperm family Dipterocarpaceae (Anderson et al 1992;Stout, 1995). Bicadinanes have been reported in oils from the Assam Basin of India (Pande et al 1994;Goswami et al 2005), Surma Basin of Bangladesh (Alam and Pearson, 1993) and several basins of SE Asia (see Stout, 1995 and reference therein). As evidence by the presence of bicadinanes, dammar resin might have played significant contribution to oils in SE Asia and India.…”

Section: Resin Classmentioning

confidence: 99%

Pyrolytic and spectroscopic studies of Eocene resin from Vastan lignite Mine, Cambay basin, Western India

et al. 2009

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The molecular structure of an Eocene fossil resin (Vastan, Cambay basin, Western India) has been investigated with complimentary spectroscopic techniques. The FTIR spectrum shows strong aliphatic CH x (3000-2800 and 1460-1450 cm -1 ) and CH 3 (1377 cm -1 ) absorptions and less intense aromatic C=C (1560-1610 cm -1 ) absorptions. The major products from analytical pyrolysis are cadalene based bicyclic sesquiterpenoids including some bicadinenes and bicadinanes. The polycadinane products confirm the fossil material as an Angiosperm dammar resin, associated with inputs of tropical rain forests supported by past climates.

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Geochemical characterization and source investigation of oils discovered in Khoraghat–Nambar structures of the Assam-Arakan Basin, India

Cited by 23 publications

References 13 publications

Petroleum Geochemistry of Oils From Myanmar – A Preliminary Assessment

Petroleum Geochemistry of Oils From Myanmar – A Preliminary Assessment

Hydrocarbon Prospectivity in Central Part of Tripura, India, Using an Integrated Approach

Pyrolytic and spectroscopic studies of Eocene resin from Vastan lignite Mine, Cambay basin, Western India

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