Print this pageIntegrated Structural Interpretation of Tong-Nan-Ba
HERSCH, JAMES B., TALLEY, ROBERT F., FOWLER, TODD A., and RODRIGUEZ, ARNOLD
The Ton-Nan-Ba study area is located in the northeast portion of the Sichuan Basin, China. This area has undergone multiple stages 0 compression and deformation. Compressional deformation at Tong-Nan-Ba included orthogonal fault bend fold and fault propagation fold mechanisms. The most recent deformation formed the large northeast trending anticline which has a surface expression throughout the Tong-Nan-Ba area. Fracture sets and structural grain have changed vergence over relatively short periods of geologic time. Utilization of newer and improved seismic reprocessing technology has significantly aided in understanding the complex structural history of the Ton-Nan-Ba anticline. Approximately 1,200 km of 2D seismic and 30 square km of 3D seismic data were reprocessed and used in this study. Drilling activity on the Tong-Nan-Ba anticline has reached depths ranging from 1600 m to 5345 m. A total of 5 exploration wells were drilled within the Tong-Nan-Ba fold. Prospective reservoirs encountered within continental Triassic Xujiahe clastics and marine Jialingjiang carbonates. Permian and Carboniferous carbonate reservoirs are also prospective within the study area, but have yet to be penetrated within the study area.