## 1 Introduction  
Significant development of the three-dimensional (3D) seismic data acquisition over the past few decades has been achieved. Data processing, hydrocarbon exploration analyses, and seismic geomorphology is now a critical method for understanding a wide variety of depositional settings from shore to sea environments. This includes shallow marine settings of shelf deltas, cliffs, and submarine deep-sea fans' settings [1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13]. The researchers have demonstrated that the 3D seismic data enables identifying distinct geomorphological features. However, there is low vertical resolution in 3D seismic data to distinguish sedimentary and stratigraphic elements that are discontinuous in the sub-surface's seismic section. It is essential to delineate sequence stratigraphic unconformities and discontinuous reflections to establish a hierarchy chronology and genetically distinguish diverse geomorphic entities visualized in map surfaces (such as various fluvial channels and their channel belts) [14]. The traditional seismic 3D data can be complicated with no such surfaces and chronologically distinguishing closely spaced geomorphologic elements. The conventional 3D seismic interpretation is incapable of delineating stratigraphic discontinuities due to this technique's primary limitation in the Malay Basin [15]. Consequently, it is challenging to compare geomorphic elements truthfully and precisely in map-view with precise seismic sequence-stratigraphic surfaces in seismic cross lines. Whichever closely spaced-out channels and channel belts exist within several seismic sequences or probably reinforce auto-cyclic aggregational stacking of the avulsing rivers can be challenging to determine. This research overcomes this obstacle by incorporating the 3D seismic data with a well log to approach the considerable resolution of depositions' stratigraphic discontinuities. With roughly 25 times the higher vertical resolution than the 3D seismic volume, two-dimensional (2D) data provide a resolution of about 25 cm and enable a comprehensive stratigraphic framework identification. Therefore, erosional stratigraphic discontinuities with high amplitude can be interpreted on the seismic volume compared with geomorphic elements visualized in 3D seismic data [16]. The Malay Basin is a Tertiary trans-tensional rift basin situated in offshore Peninsula-Mar Malaysia [17]. The basin trends north-west/south-east and covers an area of about 80,000 square kilometers. It contains over 12 km or more Oligocene to recent sediments. The basin is adjacent to the Penyu and West Natuna basins to the south and south-east (Figure 1) [18; 19]. The Tenggool Arch separates the Malay Basin from the Penyu Basin (Figure 1), while the Narathiwat High separates the Malay Basin from Thailand's Pattani Basin. The Inas and Melor fields are considered gas fields located in block PM 313, roughly 215 km north-northeast of Kertih, Terengganu, and 70 km northeast of the Resak production platform. The data used in this research comprises an area of roughly 574 square kilometers in the Malay Basin. The alternation of the marine and fluvial sediments in the uppermost deposited succession \(-507\) ms of the Malay Basin shows submergence and shelf exposure several times through the Pleistocene [20; 21]. Some factors include the sea-level changes, climate, and sediment supply that probably share control of the accommodation space and, consequently, the basin fill geometry [2]. Three fluvial sequences were established at various depths in the 3D seismic data and laterally in the 2D seismic cross-sections. Earlier researchers [18] proposed that this section's topmost layer is lower Pliocene to Quaternary in age (Figure 2). The continental scale's fluvial system has been imaged using the available seismic volume and well logs with the current Chao Phraya River's exact trajectory that passes via Bangkok and into the Thailand Gulf. This river ranges from 150 m to around 230 m, and is around 50 km long from the land to the shoreline [22; 23].