ICE 2022


Structural modeling and kinematic analysis has allowed us to characterize and reconstruct basin evolution. Several industries employ this powerful tool to reduce uncertainty, nevertheless, these models present some limitations depending on the quality of the data available and the geological complexity. This work presents the structural model of the La Cira Basement-high through seismic interpretation and validates its evolution through structural kinematic restorations. The La Cira Basement-high is located in the central part of the Middle Magdalena Valley of Colombia. This structure represents a major basement anticline truncated by an early Eocene unconformity. An east-verging, buried, reverse fault limits this structure to the west, while an east-dipping normal fault bounds it to the east. In addition, the inverted Infantas fault cuts its crest. In accordance with the subsurface data, we interpreted the present-day structure of the La Cira Basement-high. This interpretation was tested through forward modeling and kinematic restoration to validate our interpretation of the structure’s development and compare it with previous interpretations from other works. Our model proposes that the La Cira Basement-high is linked to a deep-seated, blind-basement, east-verging thrust. The inversion of the Mesozoic structures is evidenced in the thickness variations and the normal fault offsets at deeper structural levels. In the end, we identified the late Paleocene – early Eocene thrusting and folding event that terminated when the sedimentation rates were larger than the structural relief.