Summary This study intends to give insights into the geological parameters of the sweet spots in an unconventional play in Cretaceous source rocks in the Middle Magdalena Valley, Colombia. This work integrates new data from outcrops, seismic interpretation, well-log correlations, facies analysis, fracture pattern and pore pressure analysis, organic geochemistry, XRD, heat flow, and petrophysical data in a 3D basin model. We conclude that unconventionals sweet spots are mainly controlled by porosity, thermal maturity, gas-oil ratios (GOR), and volumes of retained oil and gas. Our findings will help identify potential unconventional trends and exploration opportunities in the MMV Basin.