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<p>We explore the faulted zones through several attribute analyses of seismic data to reveal dense faulted zones in the subsurface horizons. Initially, the post-stack seismic data were conditioned using a dip-steered median filter to enhance structural discontinuities in the data. Various structural attributes, including similarity, dip magnitude, azimuth, and apparent dips, were employed to delineate the geometry and architecture of faults. We utilized 3D reflection seismic data from the Dibrugarh field to delineate the fault geometry within the Tipam formation of Upper Miocene age, the Barail formation of Upper Eocene to Lower Oligocene age, and the Precambrian basement. The present analysis reveals that faulting is denser and more complex in the southern part of the study region compared to its northern part. This study also elucidates the tectonic activities that took place during the time of different depositional environments associated with the Tipam and Barail formations, as well as the basement. This study provides insights to enhance our understanding of basin evolution and structural environments suitable for hydrocarbon entrapment within the basin.</p>

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Seismic attributes elucidating the geometry of subsurface faults: A case study from the upper Assam basin, NE India

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Jitender Kumar,
  • Bappa Mukherjee,
  • Kalachand Sain

摘要

We explore the faulted zones through several attribute analyses of seismic data to reveal dense faulted zones in the subsurface horizons. Initially, the post-stack seismic data were conditioned using a dip-steered median filter to enhance structural discontinuities in the data. Various structural attributes, including similarity, dip magnitude, azimuth, and apparent dips, were employed to delineate the geometry and architecture of faults. We utilized 3D reflection seismic data from the Dibrugarh field to delineate the fault geometry within the Tipam formation of Upper Miocene age, the Barail formation of Upper Eocene to Lower Oligocene age, and the Precambrian basement. The present analysis reveals that faulting is denser and more complex in the southern part of the study region compared to its northern part. This study also elucidates the tectonic activities that took place during the time of different depositional environments associated with the Tipam and Barail formations, as well as the basement. This study provides insights to enhance our understanding of basin evolution and structural environments suitable for hydrocarbon entrapment within the basin.