This reference is for an abstract only. A full paper was not submitted for this conference. The Casabe field in the middle Magdalena valley of Colombia has been producing since the mid-1940s. With some 18 million bbl remaining recoverable reserves, the field is undergoing its third redevelopment campaign. One of the biggest challenges is reducing uncertainty in the decision making process. Evaluation of the properties of the producing horizons allows the selection of the best intervals for completion and enables reliable reservoir simulations that can be used to select products and solutions to increase production. In the past, many factors led to the suboptimal exploitation of the field. The presence of potassium feldspar and other radioactive materials made gamma ray logs inconclusive for the identification of reservoir rocks. As a consequence, spontaneous potential (SP) was traditionally used as the main indicator of reservoir rocks. The evaluation of saturation has also become a challenge. In new wells, the computation of reliable water saturation is affected by a combination of high clay content and the fact that the field has experienced fresh water injection for more than 20 years. So far, 25 wells have been drilled in different areas of the field to increase production and acquire data for a better characterization of the reservoir. Many of these wells were used to test different new logging technologies, which ranged from the latest generation of resistivity- porosity tools to more sophisticated measurements like magnetic resonance, pulsed neutron, and formation testers. This paper compiles some of the results these different technologies showed in the field. A discussion of the role of such technologies in the decision-making process for completing better wells and in understanding the reservoir architecture and flow behavior is also included.