Orito Geology

The Orito field, almost 43 square kilometres in area, is the largest field in southern Colombia and is estimated to have originally contained in excess of 1.0 billion barrels of oil in three primary sandstone reservoirs; the Eocene Pepino, and the Cretaceous Villeta and Caballos. The most significant is the Cretaceous Caballos formation, which is estimated to have originally contained more than 700 million barrels of oil-in-place.

The Caballos is a complex series of fluvial/deltaic and marginal marine sands and is the primary producing reservoir in the field. The Caballos zone is interpreted to have a tilted oil/water contact that originally dipped from northeast to southwest at least 280 metres within the field. Crude quality varies from near 30° API in structurally low areas to as high as 43° API in the northern, up-dip areas of the field.