Staff View: Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential

Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential

The Neogene succession of the onshore petroleum prolific West Baram Province of North-West Borneo contains organic-rich sediments particularly within Sarawak Basin. Bulk and quantitative pyrolysis results, coupled with organic petrographic characteristics of Neogene organic-rich sediments have enabl...

Full description

Saved in:

Bibliographic Details
Main Authors:	Togunwa, O.S., Abdullah, W.H., Hakimi, M.H., Barbeito, P.J.
Format:	Article
Published:	Elsevier 2015
Subjects:	Q Science (General) QE Geology
Online Access:	http://eprints.um.edu.my/19534/ http://dx.doi.org/10.1016/j.marpetgeo.2015.02.032
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my.um.eprints.19534
record_format	eprints
spelling	my.um.eprints.195342018-10-02T05:44:16Z http://eprints.um.edu.my/19534/ Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential Togunwa, O.S. Abdullah, W.H. Hakimi, M.H. Barbeito, P.J. Q Science (General) QE Geology The Neogene succession of the onshore petroleum prolific West Baram Province of North-West Borneo contains organic-rich sediments particularly within Sarawak Basin. Bulk and quantitative pyrolysis results, coupled with organic petrographic characteristics of Neogene organic-rich sediments have enabled investigation of the source rock characteristics and evaluation of the hydrocarbon generation potential. The results were used to assess the quantity of organic matter, kerogen composition, thermal maturity and type of petroleum that could possibly be generated from these Neogene sediments.The total organic carbon (TOC) contents of the Neogene sediments range between 1.06 and 11.11wt. % and Hydrogen Index (HI) values are largely below 105mg HC/g TOC, suggesting that the sediments are organically rich and contain gas-prone Type III kerogen. This kerogen type is supported by the abundant terrestrial materials (i.e., vitrinite phytoclasts, spores and pollen), low atomic hydrogen-to-carbon atomic (H/C) ratio and high abundance of aromatic hydrocarbons in Pyrolysis GC pyrograms and would likely generate mainly condensate and gas. The analysed samples have vitrinite reflectance in the range of 0.39-0.48 %Ro and pyrolysis Tmax in the range of 401-434°C which indicate that these Neogene sediments contain immature to very early-mature organic matter. This implies that these onshore sediments have not been buried to a sufficient depth, however the offshore stratigraphic equivalent of these sediments are known to have been buried to deeper depth and could therefore act as an effective petroleum source rock in particular for natural gas. Elsevier 2015 Article PeerReviewed Togunwa, O.S. and Abdullah, W.H. and Hakimi, M.H. and Barbeito, P.J. (2015) Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential. Marine and Petroleum Geology, 63. pp. 115-126. ISSN 0264-8172 http://dx.doi.org/10.1016/j.marpetgeo.2015.02.032 doi:10.1016/j.marpetgeo.2015.02.032
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	Q Science (General) QE Geology
spellingShingle	Q Science (General) QE Geology Togunwa, O.S. Abdullah, W.H. Hakimi, M.H. Barbeito, P.J. Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
description	The Neogene succession of the onshore petroleum prolific West Baram Province of North-West Borneo contains organic-rich sediments particularly within Sarawak Basin. Bulk and quantitative pyrolysis results, coupled with organic petrographic characteristics of Neogene organic-rich sediments have enabled investigation of the source rock characteristics and evaluation of the hydrocarbon generation potential. The results were used to assess the quantity of organic matter, kerogen composition, thermal maturity and type of petroleum that could possibly be generated from these Neogene sediments.The total organic carbon (TOC) contents of the Neogene sediments range between 1.06 and 11.11wt. % and Hydrogen Index (HI) values are largely below 105mg HC/g TOC, suggesting that the sediments are organically rich and contain gas-prone Type III kerogen. This kerogen type is supported by the abundant terrestrial materials (i.e., vitrinite phytoclasts, spores and pollen), low atomic hydrogen-to-carbon atomic (H/C) ratio and high abundance of aromatic hydrocarbons in Pyrolysis GC pyrograms and would likely generate mainly condensate and gas. The analysed samples have vitrinite reflectance in the range of 0.39-0.48 %Ro and pyrolysis Tmax in the range of 401-434°C which indicate that these Neogene sediments contain immature to very early-mature organic matter. This implies that these onshore sediments have not been buried to a sufficient depth, however the offshore stratigraphic equivalent of these sediments are known to have been buried to deeper depth and could therefore act as an effective petroleum source rock in particular for natural gas.
format	Article
author	Togunwa, O.S. Abdullah, W.H. Hakimi, M.H. Barbeito, P.J.
author_facet	Togunwa, O.S. Abdullah, W.H. Hakimi, M.H. Barbeito, P.J.
author_sort	Togunwa, O.S.
title	Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
title_short	Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
title_full	Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
title_fullStr	Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
title_full_unstemmed	Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential
title_sort	organic geochemical and petrographic characteristics of neogene organic-rich sediments from the onshore west baram delta province, sarawak basin: implications for source rocks and hydrocarbon generation potential
publisher	Elsevier
publishDate	2015
url	http://eprints.um.edu.my/19534/ http://dx.doi.org/10.1016/j.marpetgeo.2015.02.032
_version_	1643691017360113664
score	13.211869

Organic geochemical and petrographic characteristics of Neogene organic-rich sediments from the onshore West Baram Delta Province, Sarawak Basin: Implications for source rocks and hydrocarbon generation potential

Similar Items