| Citation: |
Jian-ming Gong, Jing Liao, Jie Liang, Bao-hua Lei, Jian-wen Chen, Muhammad Khalid, Syed Waseem Haider, Ming Meng, 2020. Exploration prospects of oil and gas in the Northwestern part of the Offshore Indus Basin, Pakistan, China Geology, 3, 633-642. doi: 10.31035/cg2020051
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Exploration prospects of oil and gas in the Northwestern part of the Offshore Indus Basin, Pakistan
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Abstract
Oil and gas resources are short in Pakistan and no commercially viable oil and gas sources have been yet discovered in its offshore areas up to now. In this study, the onshore-offshore stratigraphic correlation and seismic data interpretation were conducted to determine the oil and gas resource potential in the Offshore Indus Basin, Pakistan. Based on the comprehensive analysis of the results and previous data, it is considered that the Cretaceous may widely exist and three sets of source rocks may be developed in the Offshore Indus Basin. The presence of Miocene mudstones has been proven by drilling to be high-quality source rocks, while the Cretaceous and Paleocene–Eocene mudstones are potential source rocks. Tectonic-lithologic traps are developed in the northwestern part of the basin affected by the strike-slip faults along Murray Ridge. Furthermore, the Cretaceous and Paleocene–Eocene source rocks are thick and are slightly affected by volcanic activities. Therefore, it can be inferred that the northwestern part of Offshore Indus Basin enjoys good prospects of oil and gas resources.
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Keywords:
- Oil and gas /
- Cretaceous /
- Offshore Indus Basin /
- Oil storage structure /
- Oil and gas engineering /
- Pakistan
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References
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Jian-ming Gong, Jing Liao, Jie Liang, Bao-hua Lei, Jian-wen Chen, Muhammad Khalid, Syed Waseem Haider, Ming Meng, 2020. Exploration prospects of oil and gas in the Northwestern part of the Offshore Indus Basin, Pakistan, China Geology, 3, 633-642. doi: 10.31035/cg2020051
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Figure 1.
Geotectonic location of Pakistan Sea area (modified from Smith GL, 2013).
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Figure 2.
Location and drilling results of 18 offshore wells in Pakistan.
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Figure 3.
Cretaceous shale discovered during the drilling of wells Karachi South A-1 and Dabbo Creek 1, while Paleocene-Eocene limestone discovered during drilling of Well Pak-G2 1 (after Khurram S et al., 2019).
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Figure 4.
Onshore-offshore stratigraphic correlation in Pakistan discovered by drilling (after Carmichael SM et al., 2009) (Location of the profile see Fig. 1).
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Figure 5.
NW-SE-trending seismic interpretation profile across the Offshore Indus Basin (Location of the profile see Fig. 1).
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Figure 6.
Sedimentary environment of source rocks in the Offshore Indus Basin and its adjacent areas in the Paleocene–Eocene (modified from Jiang KX et al., 2016).
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Figure 7.
Isopach map of Paleocene–Eocene mudstones in the Offshore Indus Basin (after Jiang KX et al., 2016).
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Figure 8.
Seismic profile passing through Well Anne 1x in the northwestern part of the Offshore Indus Basin (Well location see Figs. 2 and Fig. 7; after Carmichael SM et al., 2009).