## 5 Results  
### Seismic Sequences Interpretation  
The third-order sequences, system tract, environments, ages, and sequence boundaries from the Witiora-1 well logs and the seismic sections across the study area have been interpreted in detail. This interpretation has been done by analyzing the well log GR curves, the shapes of the GR (stacking patterns) within the four depositional packages (H4-H1) associated with the changes of sand and clay ratio.  
Figure 6 shows a detailed description of the horizons in-depth domain, lithological types, depositional environments, and ages of each sequence separated by horizons. Four sequences; SEQ4 to SEQ1 from bottom to top have been detected between horizons H4 to H1. The fourth sequence (SEQ4) is Pliocene age deposits, which overlies the Miocene age deposited during the increasing sea-level environment. SEQ4 indicated a transgressive system tract (TST) and its environment can be described from upper slope neritie water mass to mid outer shelf and outer neritie water mass. Whereas SA-SEQ3 is considered as early Pliocene age deposits and indicated lower stand system tract (LST) with coastal to inner environments. It is overlaid by HST with coastal argillaceous abundant foraminifera in the marine sediments of the Late Pliocene-Middle Giant formation depositional environment. This was overlaid by a TST of middle to outer neritie environments.  
The upper part of SA-SEQ3 represented a high stand system tract (HST) with the inner neritie depositional environment. Besides, SA-SEQ3 is a newly discovered depositional sequence in this study that can be related to the late Mangapanian Plio-Pleistocene age deposits. This package was characterized by high and continuously seismic amplitude that represented the seismic facies of this interval. This stacking pattern was interpreted as a mid to outer neritie environment. These parameters indicated a progradation stage during the regression phase resulted in HST. The upper part of the new sequence (SA-SEQ3) represents an interval characterized by a noticeable low GR record, low and discontinuously seismic amplitude, and several downlaps across the seismic data. This new depositional sequence was part of SEQ4.  
However, due to the different seismic facies and reflection termination, SA-SEQ3 is considered as a new sequence separated from SEQ4. This proofed that the new subdivision surface of the Giant deposition packages was entirely accurate. The new SA-Middle Giant Formation sequence (SA-SEQ3) has been identified based on the standard seismic sequence stratigraphic principles. The principles used included reflection terminations, seismic facies variations, seismic original amplitude patterns, and confirmed by the synthetic seismogram as shown in Figures 3-6. The Upper Giant formation is the youngest sequence among all that is underlain by the seafloor of SEQ1 which was deposited during the Pliocene-Pleistocene age as shown in Figure 6. This sequence consisted of two system tracts cycles; TST that formed the bottom part with middle to outer neritie depositional environment and HST that formed the upper part of this sequence with the coastal depositional environment.