Structural styles, hydrocarbon prospects, and potential in the Salt Range and Potwar Plateau, north Pakistan

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• 作者：Ishtiaq A. K. Jadoon ; Matthias Hinderer ; Beenish Wazir…
• 关键词：Prospects ; Detachment folds ; Fault ; propagation folds ; Fault ; bend folds ; Pop ; up structures ; Triangle zone
• 刊名：Arabian Journal of Geosciences
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：8
• 期：7
• 页码：5111-5125
• 全文大小：4,066 KB
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• 作者单位：Ishtiaq A. K. Jadoon (1)
  Matthias Hinderer (2)
  Beenish Wazir (1)
  Rizwan Yousaf (1)
  Sher Bahadar (1)
  Muhammad Hassan (1)
  Zeeshan-ul-Hassan Abbasi (1)
  Sidra Jadoon (1)
  
  1. Department of Earth Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
  2. Institute of Applied Geosciences, TU Darmstadt, Schnittspahnstr 9, 64287, Darmstadt, Germany
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

The Salt Range/Potwar Plateau (SRPP) is part of the Himalayan foreland and an important petroleum province in north Pakistan. The hydrocarbons are commonly produced from stacked Cambrian to Eocene clastic and carbonate reservoirs which have an average thickness of 1?km. These strata are overlain by at least 5?km of Miocene and younger continental molasse sedimentation in the deepest part of the foreland basin. Surface and subsurface (seismic interpretations and borehole data) geology combined with the timing and the patterns of sedimentation has allowed to interpret the deformation as thin skinned, with a detachment in weak Eocambrian evaporates and the development of ramp-and-flat structures, since about 8?Ma. We have reviewed the structural interpretations with new borehole logs, field geology, and reserve estimates in this paper to precisely define oil-field structures with a view on future exploration. As a result of this work, 12 oil fields are classified as three detachment folds, four fault-propagation folds, four pop-ups, and one triangle zone structure. The latter two are identified as better prospects with the last one as the best with estimated reserves of 51 million barrels of oil (MMBO). Hence, the triangle zones along with other ramp-and-flat structures from the North Potwar Deformed Zone (NPDZ) are recognized to provide potential future prospects. Finally, a 40-km-long structural cross section from NPDZ is used to discuss complex deformation of the triangle zone and duplex structures as future potential prospects. About 55?km of shortening across the NPDZ during Plio-Pleistocene time is calculated, which has important bearing on the geometry of prospects, reserve calculations, and the future exploration.