Relationship between heterogeneity and seismic velocities of the Yudongzi Triassic oolitic reservoirs in the Erlangmiao area, northwest Sichuan Basin, China

► We illustrate the sedimentology of the oolitic shoals. ► We use a series of parameters to quantitatively evaluate the heterogeneity of oolitic reservoirs. ► We have established predictive relationships between the geological properties and seismic velocities of oolitic reservoirs.