Structural and Stratigraphical Interpretation of Seismic Profiles along Safed Koh Trend (Eastern Part of Sulaiman Fold Belt), Pakistan

The aim of the present study is to analyze the architecture and hydrocarbon potential of Punjab Monocline and Sulaiman Foredeep tectonic zones of the Central Indus Basin, Pakistan. Many extensive geophysical studies have been conducted to explore the stratigraphic hydrocarbon traps in the study area. However, the subsurface tectonic heterogeneities do not provide simplicity to accurately analyze the architecture and the hydrocarbon potential, which is a challenge for geoscientists. Therefore, to identify the hydrocarbon producing reservoir, we have applied the acoustic impedance inversion interpretation tool along with rock physics analysis to a 2D seismic data set of the study area. Interpretation of seismic reflection profiles reveals a 0-4-s-thick sedimentary wedge beneath an angular unconformity. Gross thickness increases towards east. Rock physics have excellently discriminated the low-impedance gas sands and shale lithologies as given by the acoustic impedance inversion. Seismic inversion analysis revealed favorable low-impedance, high-porosity locations that could be hydrocarbon potential zones. Therefore, acoustic impedance inversion in conjunction with rock physics analysis can be helpful for detecting the remaining hydrocarbon potential zones. This work flow may be helpful to identify the remaining prospects through well development to extract more hydrocarbons with the least drilling cost.

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A case study of Precambrian to Eocene sediments’ hydrocarbon potential assessment in Central Indus Basin of Pakistan

Asim

Zhu

Qureshi

et al. 2015

Arab J Geosci

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Geochemical attributes of Pliocene Dhok Pathan Formation, Eastern Sulaiman Fold and Thrust Belt, Pakistan: implications for provenance, paleoenvironmental, and tectonic settings

2021

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Assessing the hydrocarbon potential of the Kadanwari gas field using integrated seismic and petrophysical data

Khan,

Ahmed,

Naseer

et al. 2024

J Petrol Explor Prod Technol

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Kadanwari is a major gas-producing field in Pakistan's Lower Indus Basin (LIB), extensively explored for optimized production. However, the reservoir sands of the Lower Goru Formation (LGF), deposited in a complex river-dominated delta, bear severe variability and hinder accurate facies approximation for optimal production. Furthermore, the regionally extended NNW-SSE directed horst and graben structures significantly compartmentalized these reservoir facies. The main E-sand interval is analyzed for its geological properties, depositional environment, and distribution. The integration of various approaches, including seismic interpretation, attribute extraction, well-based facies modeling, and petrophysical evaluation, proved significant in evaluating the heterogeneous and tectonically influenced E-sands. The discontinuity attribute substantially highlighted the structural style and aided in analyzing the geometries of faults. The low values of the frequency attribute (< 10 Hz) signified the entrapped gas-bearing sands along the faulted zones. The high responses of instantaneous amplitude and sweetness profoundly illuminated the gas-significant deposits throughout the field in association with the well-identified gas-prone sand facies. The outcomes of the neutron-density crossplot depicted gas-bearing sands having low density (< 2.3 g/cc) and good porosity (12%) with the assessment of various cements. The facies modeling distinguished between clean and intermixed sand-shale reservoir zones. Petrophysical analysis revealed a net pay of 14 m within E-sand having gas saturation of about 68%. The adopted approach is robust and efficient, employing a limited data set for developing well-associated seismic responses for potential zone delineation within structural arrangements. The techniques can be optimistic about the LGF's complex potential sands demarcation throughout the Indus Basin.

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Structural and Stratigraphical Interpretation of Seismic Profiles along Safed Koh Trend (Eastern Part of Sulaiman Fold Belt), Pakistan

Cited by 4 publications

References 5 publications

A case study of Precambrian to Eocene sediments’ hydrocarbon potential assessment in Central Indus Basin of Pakistan

A case study of Precambrian to Eocene sediments’ hydrocarbon potential assessment in Central Indus Basin of Pakistan

Geochemical attributes of Pliocene Dhok Pathan Formation, Eastern Sulaiman Fold and Thrust Belt, Pakistan: implications for provenance, paleoenvironmental, and tectonic settings

Assessing the hydrocarbon potential of the Kadanwari gas field using integrated seismic and petrophysical data

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