Shale Gas and Shale Oil Identification Through Geophysical Inversion Of Well Logs

The Ocean* development framework allowed the creation of a Petrel* plug-in that helps to accurately identify shale gas and shale oil formations. The three different modules allow, by using conventional well logs and in a matter of seconds, the delimitation of lithological layers and the determination of key reservoir parameters for shale deposits. These parameters are: Total Organic Carbon (TOC), kerogen volume and its level of maturity (LOM), vitrinite reflectance (Ro%) and mineral volumes. By using the Plug-in, a shale gas horizon was successfully identified in a well and, based on the reservoir parameters, the well was predicted to be an effective dry gas producer, which matches with the information provided by the oil company. For this reason, it is certain that the plug-in is functional to effectively identify shale gas and shale oil reservoirs, determine the type of hydrocarbon existent, and the efficacy of the hydraulic fracking.