Characterization of triassic hydrocarbon source rocks of the Mandawa basin, Tanzania

Simple item page
dc.creatorGodson, Godfray
dc.date2019-03-06T11:40:42Z
dc.date2019-03-06T11:40:42Z
dc.date2017
dc.date.accessioned2021-03-27T11:22:30Z
dc.date.available2021-03-27T11:22:30Z
dc.descriptionDissertation (MSc Petroleum Geoscience)
dc.descriptionMandawa Basin is an onshore pull-apart basin located at the southern east coast of Tanzania and covers an area of 16,000 sq.km, it evolved during Permo-Triassic time by ENE-WSW extensional movements during Gondwana rifting and NW-SE extensional movements resulted from drifting of Madagascar during Jurassic time. Hydrocarbon exploration started in 1952, with the first deep exploration well (Mandawa-7) drilled in 1958 by BP company, thereafter ten exploration wells have been drilled up to date. The report (TPDC) shows that five wells have proven to have oil or gas shows, and five wells are dry without shows of hydrocarbons and have been abandoned. The main aim of the thesis is to characterize the source rocks potentiality and determination of the organic-rich intervals of the Basin, namely, the Mbuo Claystone Member and the Nondwa shales. In order to define a potentiality of source rock. Detailed analysis of characterization parameters should be done, these include; total organic carbon (TOC), maturity level, net-to-gross ratio, and organic matter type by integrating geochemical and well log analysis approaches. The results obtained from this study shows that both Mbuo claystone and Nondwa shales have poor hydrocarbon generation potential in their organic-rich intervals. Using Passey’s method it shows that fair average TOC% values were encountered and less than 0.5 NTG for both Mbuo Claystone and the Nondwa shales using a marginal cut-off value of 0.5 wt.% TOC. The cross plot between derived TOC and geochemical parameters show that the source rocks were not worthy to be considered as potential but also the S1and S2 were independent to the thermal maturity and amount of TOC and mostly below the minimum value (1.0 and 5.0 mgHC/g Rock) for the source rocks to be considered as potential for hydrocarbon generation.
dc.identifierGodson, G. (2017). Characterization of triassic hydrocarbon source rocks of the Mandawe basin, Tanzania. Dodoma: The University of Dodoma
dc.identifierhttp://hdl.handle.net/20.500.12661/587
dc.identifier.urihttp://hdl.handle.net/20.500.12661/587
dc.languageen
dc.publisherThe University of Dodoma
dc.subjectTanzania
dc.subjectRocks
dc.subjectHydrocarbon
dc.subjectMandawa
dc.subjectGondwana rifting
dc.subjectExtensional movements
dc.subjectTPDC
dc.subjectTanzania petroleum development coorperation
dc.subjectTotal organic carbon
dc.subjectTOC
dc.subjectMandawa basin
dc.subjectHydrocarbons
dc.subjectHydrocarbon exploration
dc.subjectHydrocarbon generation
dc.titleCharacterization of triassic hydrocarbon source rocks of the Mandawa basin, Tanzania
dc.typeDissertation

Files

Collections

Master Dissertations