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The acoustic response of sedimentary rocks is related to their mineralogy, porosity amount and pore type. In carbonate rocks these properties are controlled by the initial deposition parameters but often even more by the diagenetic history, due to their sensitivity to chemical processes. Diagenesis, by multiple cementation and/or dissolution phases, strongly controls the pore type variations and the pore network acquisition. Besides the non-tropical carbonates often display heterogeneous mineralogy that can raise more complexity. Oligo-Miocene carbonates from the NW-Shelf of Australia present non-tropical facies deposited along a ramp which have underwent highly contrasted diagenetic processes. The uppermost sedimentary unit is characterized by completely different diagenetic processes compared to the lower ones. To decipher the links between the acoustic properties and the complexity of these rocks we …