Full text loading...
-
Quantification of Mid Aptian Net Uplift and Erosion in Lower Congo Basin
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Asia Petroleum Geoscience Conference and Exhibition (APGCE), Nov 2022, Volume 2022, p.1 - 5
Abstract
The Early to Mid-Aptian marks the cessation of rifting via seafloor spreading. Widespread uplift and erosion accompanied this early drift phase, which was likely caused by flexural rebound, though inversion due to tectonic forces may also have contributed ( Chen et al., 2013 ).
This drift phase uplift and subsequent erosion significantly impacted Aptian petroleum systems (source rocks, reservoirs, and seals; Dore & Jensen, 1996 ). In this study, our objective was to quantify the scale of uplift and erosion to develop a better picture of petroleum system dynamics and risk. Our methodology was to utilize sonic interval transit time of shale intervals in the Gamba and Dentale Formations. In addition, the results derived from sonic interval transit times were corroborated with vitrinite reflectance measurements from another 19 wells. Our analysis identified six (6) anomalous wells in southern Gabon and these were used to estimate net uplift and erosion during the Mid-Aptian.