Shoal reservoirs in carbonate ramps are more complex than previously thought. A study in SW Germany looked at a Middle Triassic formation to understand these reservoirs better. They found that the shoal complexes are not separate bodies but a mix of potential reservoirs. The reservoirs change in thickness and type of rock, influenced by cycles of regression and transgression. This complexity means that traditional reservoir models may not be accurate. Understanding these complexities is crucial for reducing uncertainties in oil and gas exploration.