Details
| Original language | English |
|---|---|
| Pages (from-to) | 329-348 |
| Number of pages | 20 |
| Journal | Journal of petroleum geology |
| Volume | 37 |
| Issue number | 4 |
| Publication status | Published - 1 Oct 2014 |
Abstract
Petroleum systems analysis and maturity modelling is used to predict the timing and locations of hydrocarbon generation in the underexplored offshore Zambezi Delta depression and Angoche basin, northern Mozambique. Model inputs include available geological, geochemical and geophysical data. Based on recent plate-tectonic reconstructions and regional correlations, the presence of Valanginian and Middle and/or Late Jurassic marine source rock is proposed in the study area. The stratigraphy of the Mozambique margin was interpreted along reflection seismic lines and tied to four wells in the Zambezi Delta depression. Thermal maturity was calibrated against measured vitrinite reflectance values from these four wells. Four 1-D models with calibration data were constructed, together with another five without calibration data at pseudo-well locations, and indicate the maturity of possible source rocks in the Zambezi Delta depressions and Angoche basin. Two 2-D petroleum systems models, constrained by seismic reflection data, depict the burial history and maturity evolution of the Zambezi Delta basin. With the exception of the deeply-buried centre of the Zambezi Delta depression where potential Jurassic and Lower Cretaceous source rocks were found to be overmature for both oil and gas, modelling showed that potential source rocks in the remaining parts of the study area are mature for hydrocarbon generation. In both the Zambezi Delta depression and Angoche basin, indications for natural gas may be explained by early maturation of oil-prone source rocks and secondary oil cracking, which likely began in the Early Cretaceous. In distal parts of the Angoche basin, however, the proposed source rocks remain in the oil window.
Keywords
- Angoche basin, Cretaceous, Hydrocarbons, Jurassic, Maturity modelling, Mozambique, Petroleum systems, Source rock, Transformation ratio, Vitrinite reflectance, Zambezi Delta
ASJC Scopus subject areas
- Energy(all)
- Fuel Technology
- Energy(all)
- Energy Engineering and Power Technology
- Earth and Planetary Sciences(all)
- Geology
- Earth and Planetary Sciences(all)
- Earth and Planetary Sciences (miscellaneous)
Sustainable Development Goals
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In: Journal of petroleum geology, Vol. 37, No. 4, 01.10.2014, p. 329-348.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Maturity and petroleum systems modelling in the offshore zambezi delta depression and Angoche Basin, Northern Mozambique
AU - Mahanjane, E. S.
AU - Franke, D.
AU - Lutz, R.
AU - Winsemann, J.
AU - Ehrhardt, A.
AU - Berglar, K.
AU - Reichert, C.
N1 - Publisher Copyright: © 2014 Scientific Press Ltd.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - Petroleum systems analysis and maturity modelling is used to predict the timing and locations of hydrocarbon generation in the underexplored offshore Zambezi Delta depression and Angoche basin, northern Mozambique. Model inputs include available geological, geochemical and geophysical data. Based on recent plate-tectonic reconstructions and regional correlations, the presence of Valanginian and Middle and/or Late Jurassic marine source rock is proposed in the study area. The stratigraphy of the Mozambique margin was interpreted along reflection seismic lines and tied to four wells in the Zambezi Delta depression. Thermal maturity was calibrated against measured vitrinite reflectance values from these four wells. Four 1-D models with calibration data were constructed, together with another five without calibration data at pseudo-well locations, and indicate the maturity of possible source rocks in the Zambezi Delta depressions and Angoche basin. Two 2-D petroleum systems models, constrained by seismic reflection data, depict the burial history and maturity evolution of the Zambezi Delta basin. With the exception of the deeply-buried centre of the Zambezi Delta depression where potential Jurassic and Lower Cretaceous source rocks were found to be overmature for both oil and gas, modelling showed that potential source rocks in the remaining parts of the study area are mature for hydrocarbon generation. In both the Zambezi Delta depression and Angoche basin, indications for natural gas may be explained by early maturation of oil-prone source rocks and secondary oil cracking, which likely began in the Early Cretaceous. In distal parts of the Angoche basin, however, the proposed source rocks remain in the oil window.
AB - Petroleum systems analysis and maturity modelling is used to predict the timing and locations of hydrocarbon generation in the underexplored offshore Zambezi Delta depression and Angoche basin, northern Mozambique. Model inputs include available geological, geochemical and geophysical data. Based on recent plate-tectonic reconstructions and regional correlations, the presence of Valanginian and Middle and/or Late Jurassic marine source rock is proposed in the study area. The stratigraphy of the Mozambique margin was interpreted along reflection seismic lines and tied to four wells in the Zambezi Delta depression. Thermal maturity was calibrated against measured vitrinite reflectance values from these four wells. Four 1-D models with calibration data were constructed, together with another five without calibration data at pseudo-well locations, and indicate the maturity of possible source rocks in the Zambezi Delta depressions and Angoche basin. Two 2-D petroleum systems models, constrained by seismic reflection data, depict the burial history and maturity evolution of the Zambezi Delta basin. With the exception of the deeply-buried centre of the Zambezi Delta depression where potential Jurassic and Lower Cretaceous source rocks were found to be overmature for both oil and gas, modelling showed that potential source rocks in the remaining parts of the study area are mature for hydrocarbon generation. In both the Zambezi Delta depression and Angoche basin, indications for natural gas may be explained by early maturation of oil-prone source rocks and secondary oil cracking, which likely began in the Early Cretaceous. In distal parts of the Angoche basin, however, the proposed source rocks remain in the oil window.
KW - Angoche basin
KW - Cretaceous
KW - Hydrocarbons
KW - Jurassic
KW - Maturity modelling
KW - Mozambique
KW - Petroleum systems
KW - Source rock
KW - Transformation ratio
KW - Vitrinite reflectance
KW - Zambezi Delta
UR - http://www.scopus.com/inward/record.url?scp=84904891805&partnerID=8YFLogxK
U2 - 10.1111/jpg.12589
DO - 10.1111/jpg.12589
M3 - Article
AN - SCOPUS:84904891805
VL - 37
SP - 329
EP - 348
JO - Journal of petroleum geology
JF - Journal of petroleum geology
SN - 0141-6421
IS - 4
ER -