The only produced offshore gas field in Bangladesh, known as the Sangu field, is located in the Hatiya Trough in the east of the Bay of Bengal, and has estimated total reserves of about 1055 BCF GIIP. The early shut‐down of the field in October 2013 may have resulted in significant volumes of recoverable gas being left in the subsurface over a depth range of 1893 m to 3640 m. In this paper, seismic and well log data were analyzed and interpreted in order to investigate the structure and stratigraphy of the Sangu field, together with the lithology, extent and petrophysical properties of the reservoir. The general lithostratigraphy at Sangu has some similarity to that of the Surma Basin of the Bengal Foredeep. Reservoir rocks consist of Miocene and Pliocene deltaic sandstones and deep‐water clastics. The source rock is the Miocene Bhuban Shale which is mature for gas generation in the Hatiya Trough.

中文翻译：

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孟加拉国离岸三股气田的地球物理特征：储层的约束

孟加拉国唯一生产的海上天然气田，称为Sangu气田，位于孟加拉湾东部的Hatiya槽中，估计总储量约为1055 BCF GIIP。该气田于2013年10月提前关闭，可能导致在1893 m至3640 m的深度范围内将大量可回收气体留在地下。本文对地震和测井数据进行了分析和解释，以研究三姑油田的构造和地层，以及储层的岩性，范围和岩石物理性质。Sangu的一般岩相地层学与孟加拉Foredeep的Surma盆地有一些相似之处。储集层岩石由中新世和上新世三角洲砂岩和深水碎屑组成。