Mounds and Boundstone Facies in the Late Carboniferous–Early Permian Pha Nok Khao Formation-equivalent of the Loei Syncline, Loei-Phetchabun Foldbelt: Implications for Reservoir Quality

Late Carboniferous–Middle Permian carbonate platforms are major petroleum reservoirs in the Khorat region of northeastern<br>Thailand. Previous sedimentological work on these platforms in outcrop and core highlighted the dominance of platform<br>interior (subtidal to intertidal) facies and platform margin (shoal) facies, with minor boundstone facies typically associated<br>with the platform interior (e.g. phylloid algal mounds).