Miocene seismic stratigraphy and geomorphology of Bibiyana gas field, Surma Basin, Bangladesh

AAPG Bulletin ◽  
2021 ◽  
Vol 105 (9) ◽  
pp. 2317-2347
Author(s):  
Kenneth D. Ehman ◽  
Andrea F. Lisi ◽  
William S. Kowalik ◽  
James W. Turner ◽  
Joyanta Dutta ◽  
...  
Keyword(s):  
Seismic Stratigraphy ◽  
Gas Field ◽  
Surma Basin

scholarly journals Characterization of Reservoir Rocks of X Gas Field, Surma Basin, Bangladesh

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Afroza Parvin ◽  
Md Jamilur Rahman ◽  
Abdus Samad ◽  
A.S.M. Woobaidullah
Keyword(s):  
Gas Field ◽  
Reservoir Rocks ◽  
Surma Basin

Incorporation of Sequence Stratigraphy in Gas Reservoir Correlation: A Case Study

2019 ◽  
Vol 45 (2) ◽  
pp. 209-216
Author(s):  
Afroza Parvin ◽  
ASM Woobaidullah
Keyword(s):  
Sequence Stratigraphy ◽  
Reservoir Characterization ◽  
Gamma Ray ◽  
Stratigraphic Correlation ◽  
Gas Field ◽  
Sequence Stratigraphic ◽  
Neutron Porosity ◽  
Wireline Logs ◽  
Surma Basin

The application of sequence stratigraphy to resolve the miscorrelation between different genetic units in reservoir characterization in a gas field of Surma Basin is dealt with. Interpretation of available seismic and wireline logs (gamma ray, resistivity, density and neutron porosity) give the sequence stratigraphic correlation of reservoir sands. The reservoirs geometry, its extent, seal architecture and trapping styles have been revealed better with this correlation. There is juxtaposition of two reservoir sands, namely A1 and A2. A1 is located at older highstand sand, whereas A2 is in the younger lowstand sand. Lithostratigraphically they might be same but sequences stratigraphy reveals that they are different and deposited at different times. Moreover, the concept reveals that lowstand sand has better reservoir quality than any highstand and transgressive sand. Asiat. Soc. Bangladesh, Sci. 45(2): 209-216, December 2019

scholarly journals Petrophysical Reservoir Characterization of Habiganj Gas Field, Surma Basin, Bangladesh

2021 ◽  
Vol 10 (1) ◽  
pp. 1-10
Author(s):  
Shamiha Shafinaz Shreya ◽  
Md Anwar Hossain Bhuiyan ◽  
Shakhawat Hossain ◽  
Tania Sultana
Keyword(s):  
Reservoir Characterization ◽  
Water Saturation ◽  
Volumetric Analysis ◽  
Reservoir Quality ◽  
Gas Field ◽  
Hydrocarbon Production ◽  
Petrophysical Parameters ◽  
Shale Volume ◽  
Lower Reservoir ◽  
Surma Basin

The previous studies on the petrophysical and volumetric analysis of Habiganj gas field were based on limited well data. As the accuracy of volumetric analysis relies greatly on petrophysical parameters, it is important to estimate them accurately. In this study we analyzed all eleven wells drilled in the Habiganj field to determine the petrophysical parameters. Analysis of the well logs revealed two distinct reservoir zones in this field termed as upper reservoir zone and lower reservoir zone. Stratigraphically, these two reservoir zones are in the Bokabil and Bhuban Formation of Surma Group. Petrophysical analysis shows significant differences between the two zones in terms of petrophysical parameters. Porosity in the upper reservoir zone ranges from 12% to 36%, with an average of 28%. This zone is highly permeable, as indicated by the average permeability of 500 mili Darcy (mD). The average water saturation in this zone is around 18% suggesting high gas saturation. The lower reservoir zone has an average porosity, permeability, and water saturation of 12%, 60mD, and 43%, respectively, indicating poor reservoir quality. An analysis of log motifs indicates that the upper reservoir zone is composed of stacked sands of blocky pattern. The sands in this interval are clean, as indicated by the lower shale volume of 12-15%. The average thickness of this zone is 230m, and the presence of this zone in all the drilled wells suggests high lateral continuity. The lower reservoir zone consists of sand bodies of serrated pattern. The sands have high shale volume and are laterally discontinuous. Overall, the upper reservoir zone has superior petrophysical properties to the lower reservoir zone. Although the reservoir quality of the lower reservoir zone is poorer than that of the upper zone, this zone can be considered as the secondary target for hydrocarbon production. Petrophysical parameters of this study were estimated from all the eleven wells drilled in this field; hence the values are more accurate. The reported values of the petrophysical parameters in this study are recommended to use to re-estimate the reserves in Habiganj field. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 10(1), 2021, P 1-10

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