Pore pressure prediction using seismic acoustic impedance in an overpressure carbonate reservoir

Abstract The drilling engineers favor a quantifiable understanding of the subsurface overpressure zones to avoid hazards. conventional pore pressure estimation techniques in carbonate reservoirs are prone uncertainties that affect calculated model resolution and still far from satisfactory. Basically, reservoirs, effect chemical process cementation on porosity is more important than mechanical compaction, so prediction methods based normal compaction trend mostly do not provide acceptable results. Using for can yield large errors, even suggesting reduction abnormal where considerable attention must be paid. Conventional need density velocity calculate effective overburden pressures. Converting acoustic impedance always associated with errors generally provides low resolution, which adds substantial prediction. Although measurements usually additional error-prone steps dropped if used directly. This research outlines famous Iranian reservoir using direct without inverting it velocity. Finally, this method gives results formations compared Repeat Formation Test (RFT) region. show zone between two low-pressure intervals reservoir. result great help determining boundaries as well planning trajectory new wells. Furthermore, also central part seismic section. proposed approach viable alternative line geological field report, ratio hydrocarbon potential total rock sides higher its middle part. In study, we want emphasize calibrated function obtained our area similar basins reservoirs.