which can be correlated to the scheme of current strata in the study area. The three sequences consist primarily of stacked lowstand systems tracts, along with deposition of transgressive systems tracts and highstand systems tracts, respectively. For each sequence, we recognized it's boundary and the interface of system tracts by interpreting wireline-log patterns and lithological combinations and successions (Figs. 4 and 5); such as (1) sharp lithological contacts (e.g. clean sandstone truncating underlying shale), (2) log curve changes (e.g. gamma ray log curves), (3) weathering-denudation surfaces and scouring surfaces, (4) transitional surfaces between the ascending and falling cycles, and (5) thick, widespread mudstone as the markers of condensed sections