Identifying Pore Type of Lagoon and Barrier Carbonate to Model Shear Wave Velocity in Salawati Basin by Differential Kuster-ToksÖz

The shape of pores in sedimentary rocks is dependent on the geometric structure rock matrix grains. Carbonate have more complex pore types compared to clastic due effects diagenesis and depositional environment. study analyzed deposition Kais carbonate barrier lagoon environments. It categorized into inter-particle, moldic/vuggy, micro-cracks. type a directly related its stiffness shear resistance, which influences wave velocity (Vs). Thus, higher modulus leads Vs value. Reservoir characterization heavily relies data. However, this data limited observed area. Therefore, modeling effective efficient approach. will conduct thoroughly with identification type. moduli are calculated by inclusion method using differential Kuster-Toksöz (DKT) equation defining aspect ratio, reflecting YP-1 well has carbonate, while YP-2 YP-3 inter-particle as primary Micro-cracks top present. YP-4 YP-5 similar proportions micro-cracks dominant types. predicted measured logs strongly correlate an R2 value above 0.8. range for 2,300 ft/s 6,000 ft/s, it 8,500 ft/s. Pore very stiff (moldic type).