Structural Interpretation and Time-Depth Conversion Based on 2D Seismic Data of Indus Offshore Area, Pakistan

Structural Interpretation and Time-Depth Conversion Based on 2D Seismic Data of Indus Offshore Area, Pakistan

  • Moazzam Ullah Baig School of Energy and Resources, China University of Geosciences, Beijing 100083, China
  • Qamar UZ Zaman Dar 1Department of Geology, Northwest University, Xi'an, 710069, People Republic of China,
  • Fahad Zareef Department of Earth Sciences, Quaid E Azam University, Islamabad 44000, Pakistan
  • Rana Imran Ali Kufpec, Islamabad, 44000, Pakistan
  • Muhammad Tahir Jameel College of Geophysics and Petroleum Resources, Yangtaze University Wuhan, 430100, People Republic of China
Keywords: strata correlation, structural interpretation, time-depth conversion, Indus offshore area.


Indus offshore basin of Pakistan is a prolific region for hydrocarbon resource exploration, however along with availability of limited geological and geophysical data, an attempted has been carried out in this area.  Data from a seismic strike line 9033-86 which containing shot points 1481 to 3361 have been deliberated comprehensively with remarkable and tremendous calibration. Five prominent and imperative reflectors specifically the Upper Cretaceous, Eocene, Lower-Upper Oligocene and Intra Miocene successions were interpreted through seismic tactics. Structurally, area comprises of normal faults i.e. horst and graben structures on the seismic profiles. Three normal faults have been recognized in the region, which reflect the extensional regime and associated structural styles. Through analysis of vertical and lateral velocity variations of various geological layers, interval velocity and average velocity graphs have been prepared from the concerned velocity functions. According to the time-depth conversion model, depth contour maps outline the Eocene units with anticline and syncline. The trend of these reflectors shows that these are more or less parallel to each other while dipping towards the northwest which may provide a suitable structure for the accumulation of hydrocarbons. Therefore, an integrated study of accurate seismic interpretation, structural analysis and time-depth conversion provided a promising site for future hydrocarbon exploration.


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