Petrophysical Rock Texture Prediction in the Upper Jurassic Series in Saudi Arabia: Aiming Toward Stratigraphic Trap Identification

The Upper Jurassic series comprises the most prolific hydrocarbon-bearing formations in Saudi Arabia. It consists of 7 formations which are 3rd order sequences of about 2.5 Ma each. It hosts 13 hydrocarbon reservoirs, 2 major source rock intervals and good associated seals. The total thickness of carbonates and evaporites in the Upper Jurassic series, in the study area is greater than 3500 feet (Figure 1). Predicting the rock texture distribution with the use of wireline logs can help us subsequently identify the potential reservoir facies distribution and that, in turn, can be used for stratigraphic trap identification.