Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen
Integration of geophysical and geochemical approaches is used for qualitative and quantitative evaluation of source rocks. The Upper Jurassic rocks in the Sayun-Masila basin are used as a case study due to its high hydrocarbon potentiality. Stratigraphically, these rocks could be differentiated from...
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| Language: | English |
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Egyptian Petroleum Research Institute
2018-12-01
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| Series: | Egyptian Journal of Petroleum |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062117303537 |
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| author | Awad A. Omran Nabil M. Alareeq |
| author_facet | Awad A. Omran Nabil M. Alareeq |
| author_sort | Awad A. Omran |
| collection | DOAJ |
| description | Integration of geophysical and geochemical approaches is used for qualitative and quantitative evaluation of source rocks. The Upper Jurassic rocks in the Sayun-Masila basin are used as a case study due to its high hydrocarbon potentiality. Stratigraphically, these rocks could be differentiated from base to top into: Shuqra, Madbi and Nayfa formations. The total organic carbon (TOC) values were determined in the shale and/or carbonate intervals of these formations from four studied wells by the ΔlogR method using sonic, resistivity and gamma-ray log data. Then the discriminant analysis was applied in differentiating source from non-source rocks. Also, the effect of the burial and thermal histories on the organic material maturation and the oil and/or gas generation was studied through the application of two analytical methods, namely, the level of organic metamorphism (LOM) and the time-temperature index (TTI), depending on the corrected temperature logs integrated with the time and depth data. The reliability of the obtained results has been confirmed and combined with the results supplied from geochemical analyses. The Upper Jurassic sediments are found to be oil–prone source rock in a mature stage. The Madbi Formation is considered as the most effective source rock. The burial and thermal histories of the basin in four modeled wells showed that mature oil generation window and hydrocarbon expulsion would have been initiated in the depocenters from Upper Jurassic Madbi Formation source rock during Late Cretaceous to Middle Miocene time. Keywords: Source rocks evaluation, ΔLogR method, Total organic carbon (TOC), Time-temperature index (TTI), Sayun-Masila basin, Yemen |
| format | Article |
| id | doaj-art-bba5a6f91c0646ddabd2a7def2d56e6a |
| institution | DOAJ |
| issn | 1110-0621 |
| language | English |
| publishDate | 2018-12-01 |
| publisher | Egyptian Petroleum Research Institute |
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| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-bba5a6f91c0646ddabd2a7def2d56e6a2025-08-20T03:04:38ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212018-12-01274997101210.1016/j.ejpe.2018.03.003Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, YemenAwad A. Omran0Nabil M. Alareeq1Department of Geology, Faculty of Sciences, Assiut University, Assiut 71516, Egypt; Corresponding author.Department of Geology and Environment, Faculty of Applied Sciences, Thamar University, Thamar, YemenIntegration of geophysical and geochemical approaches is used for qualitative and quantitative evaluation of source rocks. The Upper Jurassic rocks in the Sayun-Masila basin are used as a case study due to its high hydrocarbon potentiality. Stratigraphically, these rocks could be differentiated from base to top into: Shuqra, Madbi and Nayfa formations. The total organic carbon (TOC) values were determined in the shale and/or carbonate intervals of these formations from four studied wells by the ΔlogR method using sonic, resistivity and gamma-ray log data. Then the discriminant analysis was applied in differentiating source from non-source rocks. Also, the effect of the burial and thermal histories on the organic material maturation and the oil and/or gas generation was studied through the application of two analytical methods, namely, the level of organic metamorphism (LOM) and the time-temperature index (TTI), depending on the corrected temperature logs integrated with the time and depth data. The reliability of the obtained results has been confirmed and combined with the results supplied from geochemical analyses. The Upper Jurassic sediments are found to be oil–prone source rock in a mature stage. The Madbi Formation is considered as the most effective source rock. The burial and thermal histories of the basin in four modeled wells showed that mature oil generation window and hydrocarbon expulsion would have been initiated in the depocenters from Upper Jurassic Madbi Formation source rock during Late Cretaceous to Middle Miocene time. Keywords: Source rocks evaluation, ΔLogR method, Total organic carbon (TOC), Time-temperature index (TTI), Sayun-Masila basin, Yemenhttp://www.sciencedirect.com/science/article/pii/S1110062117303537 |
| spellingShingle | Awad A. Omran Nabil M. Alareeq Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen Egyptian Journal of Petroleum |
| title | Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen |
| title_full | Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen |
| title_fullStr | Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen |
| title_full_unstemmed | Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen |
| title_short | Joint geophysical and geochemical evaluation of source rocks – A case study in Sayun-Masila basin, Yemen |
| title_sort | joint geophysical and geochemical evaluation of source rocks a case study in sayun masila basin yemen |
| url | http://www.sciencedirect.com/science/article/pii/S1110062117303537 |
| work_keys_str_mv | AT awadaomran jointgeophysicalandgeochemicalevaluationofsourcerocksacasestudyinsayunmasilabasinyemen AT nabilmalareeq jointgeophysicalandgeochemicalevaluationofsourcerocksacasestudyinsayunmasilabasinyemen |