--> Abstract: Structural Restoration as an Effective Tool for Detecting the Evolution and Timing of Structural Development: A Case Study from the Muglad Basin, Sudan, by Mohamed Abdelgader Yassin; #90077 (2008)
[First Hit]

Datapages, Inc.Print this page

Structural Restoration as an Effective Tool for Detecting the Evolution and Timing of Structural Development: A Case Study from the Muglad Basin, Sudan

Mohamed Abdelgader Yassin
Sudapet, Sudan
[email protected]

The area under investigation is located in the Muglad Basin, which is mostly covered by 2-D seismic data with fair to good quality. Three wells were drilled in this area, two of them were dry and the other one is currently producing from reservoirs such as AG-2 and Bentiu. Faults in the study area trend E-W whereas in the rest of Muglad Basin they trend NW-SE. The main objectives of this study were: (1) to evaluate the vertical migration through the faults; (2) establish the time when the structural trap formed; and (3) understand the geological evolution of the area. Five regional 2-D seismic lines were selected to conduct a structural restoration. An inclined shear algorithm was utilized because of it’s applicability for extensional tectonic regimes. Both reconstruction and flattening approaches were applied. The extension ratio (Previous HitBetaNext Hit) was used to predict the rift-sag periods. The rift stage was characterized by high Previous HitBetaNext Hit values (e.g. 1.2), while the sag period ranges for Previous HitBetaTop varied from 1 to 1.1. This sub-basin evolution history consisted of three rift phases. The first occurred during the Early Cretaceous and was the most long-lasting. The second phase, which occurred during the Late Cretaceous, many faults were initiated and others were re-activated. In the third rift phase, which occurred during the Tertiary, many faults were initiated. The study area is located near the Central African Shear Zone, which control the faults orientation. Generally the faults were formed by dextral oblique movements. The validity of the traps has been confirmed through a restoration process.

 

AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain