Petroleum prospect analysis and new gas horizon detection at Fenchuganj Gas Field in the Surma Basin, Bangladesh: An application of sequence stratigraphic concept

Parvin, Afroza; Rahman, Md Jamilur; Woobaidullah, A. S. M.

doi:10.1016/j.marpetgeo.2019.01.033

Cited by 8 publications

(9 citation statements)

References 3 publications

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“…However, the closed anticlinal structure has been largely affected by prominent paleo-channels on its crest and western flank. More interestingly, similar paleo-river channels are found on the nearby Fenchuganj gas field by Parvin et al (2019). Among seven sequence boundaries, gas sands A, B and C are encountered below SB-3 and are washed away prominently.…”

Section: Resultssupporting

confidence: 52%

“…Moreover, for reservoir characterization and identification of new prospects, integration of petrophysical and sequence-based reservoir evaluations are rarely taken into account. Recently, few endeavors have been made by Parvin et al (2019) considering the sequence stratigraphy for identifying hydrocarbon prospective zones in the Fenchuganj gas field. Hence, there is a dearth of study to identify potential hydrocarbon-bearing zones, subsurface structure and new prospects in the light of petrophysics and sequence stratigraphy.…”

Section: Introductionmentioning

confidence: 99%

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Reservoir characterization and identification of new prospect in Srikail gas field using wireline and seismic data

Hossain

Woobaidullah

Rahman

2021

J Petrol Explor Prod Technol

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Although reservoir characterization has been carried out by many researchers on the sedimentary package of the Bengal basin hydrocarbon province, integration of petrophysical and seismic sequence-based reservoir evaluation is rarely taken into account. This paper focuses on the identification of gas zones, reserve estimation and identification of new prospects in Srikail gas field within the eastern fold belt of Bengal basin integrating four wireline logs and 2D seismic data. Our study finds seven hydrocarbon-bearing zones (A, B, C, D, E, F and G) within the measured depth between 2429.5 and 3501 m. Petrophysical properties of seven hydrocarbon-bearing zones indicate that they are good quality reservoir sands. The gas horizons were mapped on seismic sections which reveal that the NW–SE anticlinal structure is largely affected by channels in the crest and western flank. The channels are infilled by fine-grained sediments which act as cap rock on northern and western parts of the structure. Thus, the anticlinal structure and fine-grained sediments make a potential trap for hydrocarbon accumulation and laterally and vertically well-distributed sequence remnants are the main reservoir rocks in this area. Volumetric reserve estimation of these sands provided a total gas initially in place as 552 billion cubic feet. Moreover, all the four wells are drilled in the southern block of the structure, and since there is a structural continuity from south to the north, it is highly recommended to drill a well up to 3000 m depth in the northern block to test its hydrocarbon potentiality. Overall, the outcomes of this study contribute new insights for reservoir characterization and identification of new prospects in an efficient way.

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Section: Resultssupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Reservoir characterization and identification of new prospect in Srikail gas field using wireline and seismic data

Hossain

Woobaidullah

Rahman

2021

J Petrol Explor Prod Technol

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“…A1 sand belongs to the erosional remnant of highstand regressive sand (Figs 4 and 5) whereas A2 is located in the incised valley filled with lowstand stacked channel sand. In terms of reservoir quality lowstand channel stacked sand is better than highstand sand (Parvin et al 2019). The log response also reveals so, A1 composed of coarsening upward parasequence set whereas A2 is composed of stacked channel sand.…”

Section: Resultsmentioning

confidence: 91%

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

Parvin¹,

Woobaidullah²

2019

J. Asiat. Soc. Bangladesh, Sci.

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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

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“…The thick dark-grey shale sequence of 80m known as Upper Marine Shale (UMS) (Imam, 2013;Parvin, 2019) is seen above the UGS of the upper Boka Bil unit (Fig. 10).…”

Section: Open Marine Facies Associationmentioning

confidence: 99%

Hydrocarbon Prospectivity of Surma Group in Sylhet Area in Context of Sequence Stratigraphy

Fahim

Mondol

Bhuiyan

2023

Dhaka Univ J Earth Env Sci

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This research focuses on studying the Surma Group sediments with an integrated approach of using wireline logs and 2D seismic data from Sylhet structure and outcrop analogy from the Zaflong-Tamabil-Jaintiapur area to explain the geological evolution in the context of sequence stratigraphic framework and its implications to identify the hidden potential of hydrocarbon traps that remains overlooked. The 'SYL-07' well logs divided the encountered sedimentary strata by sequence boundaries (SB) and flooding surfaces (FS) into an upper third-order Lowstand System Tract (3_LST), followed by the third-order Highstand System Tract (3_HST), and underlying third-order Transgressive System Tract (3_TST) which correspond to the Tipam, Boka Bil, and Bhuban formations, respectively. The 3_HST has further been subdivided into fourth-order sequences. Well-to-seismic ties helped in identifying the sequence boundaries in the regional context. Three new prospects in the nose and flank area of the Sylhet structure have been detected based on seismic attributes and log responses. Seismic sweetness attribute anomalies confirmed the existence of these prospects. Rigorous fieldworks provided nineteen facies and seven sets of sedimentary facies associations and helped to establish the sedimentological stacking patterns and corresponding depositional environments. About 2250m lithocolumn constructed from field data revealed four third-order sequence stratigraphic system tracts roughly corresponding to Renji (3_LST), Bhuban (3_TST), Boka Bil (3_HST), and Tipam (3_LST) formations in the bottom-up order, while the obtained facies associations aid in identifying four fourth-order sequences including fourth-order system tracts in the 3_HST. The lithologic column corresponds well with the seismic sections and validates the seismically interpreted third-order system tracts and fourth-order sequences. However, the high-frequency fourth-order system tracts can only be correlated with the log motif patterns due to sub-seismic resolution. The erosional remains of the fourth-order sequences in 3_HST, for instance, the coarsening upward shoreface and shelfal facies topped by transgressive shale, have yielded potential future drilling sites based on seismic attribute and log response analysis. The analogy of field data with well log and seismic data helped the overall evaluation of the hydrocarbon prospectivity of the area. The Dhaka University Journal of Earth and Environmental Sciences, Vol. 11(1), 2022: 95-110

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Petroleum prospect analysis and new gas horizon detection at Fenchuganj Gas Field in the Surma Basin, Bangladesh: An application of sequence stratigraphic concept

Cited by 8 publications

References 3 publications

Reservoir characterization and identification of new prospect in Srikail gas field using wireline and seismic data

Reservoir characterization and identification of new prospect in Srikail gas field using wireline and seismic data

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

Hydrocarbon Prospectivity of Surma Group in Sylhet Area in Context of Sequence Stratigraphy

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