Source Rock Evaluation and Hydrocarbon Potential in the Tano Basin, South Western Ghana, West Africa

Atta-Peters, D.; Garrey, P.

doi:10.11648/j.ogce.20140205.11

Cited by 23 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Annual temperatures generally range from 26° C to 29 °C, with a relative humidity of 60–90% and an annual rainfall of the order of 3200 mm. The study locations have similar geologic formation composed of schists, phyllite and greywacks rocks 34 . This study is a component of wider research to establish background radioactivity for the communities from Axim to Newtown that are situated along the coast bordering the Tano basin.…”

Section: Methodsmentioning

confidence: 90%

Evaluation of radionuclides and decay simulation in a terrestrial environment for health risk assessment

Doyi

Essumang

Dampare

et al. 2017

Sci Rep

View full text Add to dashboard Cite

This study is to assess the natural radioactivity level in soil samples in communities bordering the Tano Basin in Ghana. The radioactivity concentration of 238U, 232Th and 40K have been determined using γ-ray spectrometry, moreover, the absorbed dose rates and annual effective dose were calculated. MATLAB R2013 script was written to simulate the decay of the radionuclides 238U, 232Th and 40K using their respective half-lives. This is to determine the future impact of natural radionuclides and estimate future anthropogenic inputs. The level 238U, 232Th, and 40K ranged from (1.60 to 21.3), (2.78 to 32.2) and (111 to 528) with average values of be 8.65 Bqkg−1, 12.5 Bqkg−1 and 214 Bqkg−1 respectively in soil. The activity concentrations were lower than United Nations Scientific Committee on the Effects of Atomic Radiation guidelines for 238U, 232Th and 40K. The absorbed dose rates and annual effective dose were found to be in range of 7.79 to 37.8 nGy h−1 and 9.56E + 00 to 4.64E + 01 µSvy−1 respectively. The overall annual effective dose was lower than the allowable limit of 1mSvy−1 set by International Commission on Radiological Protection. Hex, Hin and excess lifetime cancer risk (ELCR) were calculated and found to be within internationally recommended values.

show abstract

Section: Methodsmentioning

confidence: 90%

Evaluation of radionuclides and decay simulation in a terrestrial environment for health risk assessment

Doyi

Essumang

Dampare

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The plot of T max against production index (PI) of the samples (Fig. 7) indicates presence of inert carbon to post-mature organic matters in the samples [22].…”

Section: Thermal Maturitymentioning

confidence: 98%

Hydrocarbon Potential of the Disang Group of Rocks of the Inner Paleogene Fold Belt of Assam-Arakan Basin Exposed along the Dimapur-Senapati Road Section of Nagaland and Manipur, India

Gogoi

Phukan

2019

JGEESI

View full text Add to dashboard Cite

Carbonaceous shales of the Upper Disang Formation of the Inner Paleogene Fold Belt of Assam-Arakan Basin, exposed along the Dimapur-Senapati road section of Nagaland and Manipur states of India have been studied for interpreting hydrocarbon potential. The Upper Disang Formation is mostly composed of alteration of shales, sandstones and siltstones. The shales are black coloured and splintery in nature. The shales and associated sandstones show sedimentary structures like bioturbation, cross bedding and ripple marks indicating shallow water origin. The shales contain appreciable amount of pyrites indicating marine influence in the depositional basin. The average TOC of the carbonaceous shale samples is 0.53% indicating poor generative potential. The poor generative potential of the formation is also supported by low S1 (average 0.04 mg/gTOC), S2 (average 0.16 mg/gTOC) and HI (average 36 mg/gTOC). The organic matters are represented dominantly by Type IV kerogens (inertinite) with subordinate amount of Type III kerogens (vitrinite) as shown by both Rock Eval parameters and organic petrography. The dispersed organic matters (DOM) are identified as semifusinite and collotelinite under the microscope. The organic matters are interpreted to be inert/post mature kerogens from the maturity parameters like Rock Eval Tmax (average 563°C), and mean vitrinite reflectance (average 2.0% in oil). The study indicates very poor hydrocarbon potential of the Upper Disang Formation of the Dimapur-Senapati road section.

show abstract

“…Therefore, this study has established for the first time that the Cenomanian to Turonian petroleum source rocks are of high quality, mature and have potential for oil generation (Kjemperud et al, 1992, Tucker, 1992, Katz and Mello, 2000, Brownfield and Charpentier, 2006, and Atta-Peters and Garrey, 2014.…”

Section: Petroleum System Eventsmentioning

confidence: 99%

Source rock maturity and petroleum generation in the Dahomey Basin SW Nigeria: Insights from geologic and geochemical modelling

Adeoye

Akande

Adekeye

et al. 2020

Journal of Petroleum Science and Engineering

View full text Add to dashboard Cite

Sedimentology, foraminifera paleoecology, geochemical and petroleum system modelling studies were performed on Cretaceous shales from onshore Orimedu-1 and offshore X (at a water depth of 914 m) wells in the Dahomey Basin, southwestern Nigeria to evaluate their maturity, hydrocarbon generation potentials, and regional significance for petroleum prospectivity. Foraminifera biofacies analysis of the studied shales suggests deposition in dominantly marine environments. The average total organic carbon content (TOC, wt%) and hydrogen index (HI, mgHC/gTOC) for Cenomanian, Turonian, and Coniacian shales in Xwell are 1.3, 0.9, 1.3 and 406, 560, 214 respectively. While the Cenomanian and Turonian shales in Orimedu-1 have TOC (wt%) of 1.3 and 1.9, and HI (mgHC/gTOC) of 179 and 357 respectively. Well X source rocks contain predominantly marine-derived Type II kerogen, while Orimedu-1 well contain terrigenous-derived gas prone kerogen. The integration of recently acquired kinetic data from immature source rocks further constrains the prediction of petroleum generation in the study area.1D basin modelling of X well reveals that the Cenomanian Source Rock (CSR) is the most mature bed in the basin having attained the initial 10 % transformation ratio (TR) at 87 Ma, got to peak TR (~50 %) at 86 Ma, and reached 83 % at 53.6 Ma. with a present-day thermal maturity of 0.95 % VRo. The Turonian source in well X also attained the initial 10 % TR at 87 Ma, got to peak (~50 % TR) at 86 Ma and 69 % TR at 50 Ma. These modelled source beds are deeper than the source with 0.62 %VRo used for kinetic study. The observed maturity trend is mostly controlled by the regional erosive events associated with the West African rift system during Santonian and Eocene times. The source rocks in Orimedu-1 are immature.The timing of the generated and expelled hydrocarbons into the Cretaceous petroleum

show abstract

Source Rock Evaluation and Hydrocarbon Potential in the Tano Basin, South Western Ghana, West Africa

Cited by 23 publications

References 12 publications

Evaluation of radionuclides and decay simulation in a terrestrial environment for health risk assessment

Evaluation of radionuclides and decay simulation in a terrestrial environment for health risk assessment

Hydrocarbon Potential of the Disang Group of Rocks of the Inner Paleogene Fold Belt of Assam-Arakan Basin Exposed along the Dimapur-Senapati Road Section of Nagaland and Manipur, India

Source rock maturity and petroleum generation in the Dahomey Basin SW Nigeria: Insights from geologic and geochemical modelling

Contact Info

Product

Resources

About