Identification of Gas Sand Horizons of the Rashidpur Structure, Surma Basin, Bangladesh, Using 2D Seismic Interpretation
Table 1
Summarized stratigraphic succession with spatial reflectors position in the Rashidpur structure (after BOGMC [4]).
Age
Group
Formation
Lithologic description
Thickness approximate (m)
Reflectors
Plio-Pleistocene
Dupi Tila
Dupi Tila
Mainly consists of unconsolidated sandstones, gray in color, medium to fine-grained with few soft and soapy sticky, gray clay, and intercalation of silt
314
R1
R2
R3 (UGS)
R4
R5 (LGS)
Tipam
Tipam Sandstone
Consists of gray, brown to pale gray coarse-grained sandstones with intercalation of shale
1030
Early to middle Miocene
Surma
Upper Marine Shale
Claystone or dark gray shale
187 (?)
Boka Bil Formation
Sandstone, siltstone with alteration of shale
1100
Bhuban Formation
Composed mainly of sandstones, silty sandstones, and shales. The upper part of this formation consists essentially of sandstone, light gray, moderately consolidated very fine-grained with calcareous cement