6. Depositional environments III A petroleum company has found a prospective reservoir unit. It seems to be a sedimentological trap, so only sedimentological considerations are needed in order to estimate its

size. Based on a test drilling, the company knows that the reservoir unit is composed of ooid sand. The seismic data indicates a sedimentary system in the surrounding that transits from shallow-marine to deep-marine environments. The coastline is estimated to lie in an E-W direction with the land in the south and the deep-marine area in the north.