The study looked at sedimentary layers in a specific area in China to find potential oil and gas reservoirs. By analyzing drilling, well log, seismic, and other data, researchers identified different types of sedimentary environments like alluvial fans and underwater fans. They found that certain areas within these layers, like delta fronts and deep-water turbidite fans, could hold valuable oil and gas resources. This suggests that the area has high potential for exploration and extraction of oil and natural gas.