The effective source rocks in the north Cambay Basin, India |
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| Authors: | A Banerjee M Jha A K Mittal N J Thomas K N Misra |
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| Institution: | Geochemistry Division, Keshava Deva Malviya Institute of Petroleum Exploration, Oil and Natural Gas Corporation, Kaulagarh Road, Dehradun, India |
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| Abstract: | Source rock screening reveals five laterally extending potential sources (PS) in the Paleogene. The PSs are SR5 and SR6 in dominantly marine early Eocene to late Paleocene Cambay Shale formation, and SR7, SR8/9, and SR11/12 in dominantly freshwater early Paleocene Olpad formation. Only 3 PSs, SR11/12, SR8/9, and SR7 have attained vitrinite reflectance of 0.75% at 45, 7, and 2 mybp, respectively. Chromatographic and isotope data of oils and PS samples suggest that mainly the Olpad source rocks: SR7 and SR8/9 contributed to the discovered oils. The Cambay Shale source rocks, SR5 and SR6, contrary to the prevalent view, possibly have no significant contribution towards the accumulated oils. |
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| Keywords: | Cambay Basin Effective source rocks Oil source correlation |
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