Date of Award
Master of Science (MS)
The Martaban basin, located offshore Myanmar. The sequence stratigraphic framework of upper Miocene to Pliocene was defined using a 2,261 sq.km. 3D-PSTM seismic survey, in addition to a nearby well data. The depositional environments and the reservoir potential are analyzed. The study area was segmented into three parts, based on different tectonic settings in the focus stratigraphic section.
Eight megasequences were clearly defined from early Miocene (?) to Top Pliocene. Each megasequence consists of base-of-slope turbidite system, comprising channel-fill, levee, and overbanks. System is primarily mud, with sands restricted to specific environments. Sedimentary supply primarily from N and NNE, part of Ayeyarwardy delta.
The overall sea level changes present major in relative sea level rise, which is part of lower Bathyal from biostratigraphic report. For system tracts interpretation, all of megasequences are primarily thick LSTs with thin condensed sections, equivalent to PGC, TST and HST.
The erosional nature of sequence boundaries varies from the older (Megasequences 1-4) to the younger (Megasequences 5-8). Substantial erosion of the lower slope is presented approximately 300 meters in maximum at Miocene and lower Pliocene megasequences, likely enhanced by tectonism causing to the sudden increase in volume of the sediment gravity flows. These might be 2nd order of sequence boundaries. In Pliocene, less erosion feature recorded at the lower boundaries. Possibly 3rd order of sequence boundaries is interpreted in Pliocene, with less tectonic enhancement.
The channel-fill reservoirs are thicker in the shallow megasequences in both Miocene and Pliocene. During Pliocene, two zones are recognized as lower (Megasequences 4–6) and upper Pliocene (Megasequences 7-8). Levees and overbank thickness are varies based on the width and the channel geometry, which cut through the area. In addition, carbonate reservoir in late Miocene is considering part of the reservoir as well. Typical of the stacking reservoir from the prediction of channel-filled is about 120 meters, from each 30 meters individual channel in average.
For other elements in petroleum system analysis, significant unknown of petroleum systems elements are listed as source rock presence and kerogen types with timing of the HC generation and charging.
Chongrueanglap, Pongsit, "Seismic Sequence Stratigrpaphy and Reservoir Character of Deepwater Setting in M11 Block, Martaban Basin, Myanmar" (2019). Geological Sciences Graduate Theses & Dissertations. 159.