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Precise Seismic Substructural Model of the Eocene Chorgali Limestone in the Turkwal Oil Field, Central Potwar, Pakistan
投稿时间:2018-03-18  修订日期:2018-12-28  点此下载全文
引用本文:Khawar Ashfaq AHMED,Sarfraz KHAN,Mahmood SULTAN,UMAIR Bin Nisar,Kalim ULLAH,Al -Hseinat MU’AYYAD.2019.Precise Seismic Substructural Model of the Eocene Chorgali Limestone in the Turkwal Oil Field, Central Potwar, Pakistan[J].ACTA GEOLOGICA SINICA(English edition),93(6):1711~1720
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DOI:10.1111/1755-6724.13813
作者单位E-mail
Khawar Ashfaq AHMED 1 Comsats University, Islamabad (CUI), Pakistan smartkhawar@gmail.com 
Sarfraz KHAN 2 National Centre of Excellence in Geology, University of Peshawar, Peshawar, 25130, KP, Pakistan  
Mahmood SULTAN 3 Centre for Earthquake Studies, National Centre for Physics (NCP), Islamabad, Pakistan  
UMAIR Bin Nisar 4 Centre for Climate Research and Development (CCRD), CUI, Islamabad, Pakistan  
Kalim ULLAH 1 Comsats University, Islamabad (CUI), Pakistan  
Al -Hseinat MU’AYYAD 5 Department of Geology, University of Jordon, Amman, Jordan  
 
Author NameAffiliationE-mail
Khawar Ashfaq AHMED 1 Comsats University, Islamabad (CUI), Pakistan smartkhawar@gmail.com 
Sarfraz KHAN 2 National Centre of Excellence in Geology, University of Peshawar, Peshawar, 25130, KP, Pakistan  
Mahmood SULTAN 3 Centre for Earthquake Studies, National Centre for Physics (NCP), Islamabad, Pakistan  
UMAIR Bin Nisar 4 Centre for Climate Research and Development (CCRD), CUI, Islamabad, Pakistan  
Kalim ULLAH 1 Comsats University, Islamabad (CUI), Pakistan  
Al -Hseinat MU’AYYAD 5 Department of Geology, University of Jordon, Amman, Jordan  
Abstract:The precise seismic substructural interpretation of the Turkwal oil field in the Central Potwar region of district Chakwal of Pakistan has been carried out. The research work was confined to the large fore-thrust that serves as an anticlinal structural trap through ten 2D seismic lines. A precise seismic substructural model of the Eocene Chorgali Limestone with precise orientation of thrust and oblique slip faults shows the presence of a huge fracture, which made this deposit a good reservoir. The abrupt surface changes in dip azimuth for the Eocene Chorgali Limestone verifies the structural trends and also the presence of structural traps in the Turkwal field. The logs of three wells (Turkwal deep X-2, Turkwal-01 and Fimkassar-01) were analyzed for petrophysical studies, well synthetic results and generation of an Amplitude Versus Offset (AVO) model for the area. The AVO model of Turkwal deep X-2 shows abrupt changes in amplitude, which depicts the presence of hydrocarbon content. Well correlation technique was used to define the overall stratigraphic setting and the thickness of the reservoir formation in two wells, Turkwal-01 and Turkwal deep X-2. The Eocene Chorgali Limestone in Turkwal-01 is an upward thrusted anticlinal structure and because of the close position of both wells to the faulted anticlinal structure, its lesser thickness differs compared to Turkwal deep X-2. The overall results confirm that the Turkwal field is comparable to several similar thrust-bound oil-bearing structures in the Potwar basin.
keywords:2D seismic, well correlation, fore-thrust structural traps, AVO model, Eocene Chorgali Limestone and Basement, Potwar
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