Structural styles, hydrocarbon prospects, and potential of Miano and Kadanwari fields, Central Indus Basin, Pakistan
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ORIGINAL PAPER
Structural styles, hydrocarbon prospects, and potential of Miano and Kadanwari fields, Central Indus Basin, Pakistan Saif-Ur-Rehman K. Jadoon 1,2,3
&
Ding Lin 1,3 & Siddique Akhtar Ehsan 2 & Ishtiaq A. K. Jadoon 2 & Muhammad Idrees 4
Received: 26 November 2016 / Accepted: 8 January 2020 # Saudi Society for Geosciences 2020
Abstract The main purpose of this paper is to evaluate the structural styles of Miano and Kadanwari Fields, located in the Central Indus Basin, Sindh province, Pakistan. Discovered in 1989 and 1993, Kadanwari and Miano Fields are located on the Pano Aqil graben and Kadanwari High, in between two extensive NW-SE-oriented regional highs, i.e., Jacobabad-Khairpur and Mari-Kandhkot High. The Central Indus Basin is an extensional basin exhibiting normal faulting. Fourteen seismic lines were interpreted to understand the presence, trend, and development of the fault system in the Central Indus Basin along with the assessment of the Petroleum system based on the analysis of seismic reflection data and well logs across the Cretaceous clastic reservoirs. The tectonics of Miano and Kadanwari Fields has been interpreted with the presence of normal faults, strike-slip faults, and inverted structures leading to ambiguities about the structural framework of the area. However, with this detailed study, an extensional fault system has been interpreted in the Cretaceous and lower Tertiary sections over a detachment in the incompetent Sembar Formation. In Miano Field, the faults are dominantly recognized to have NNW-SSE trend due to NW-SE-oriented extension related to northward drift of Indian Plate from Madagascar. Resultantly tilted fault blocks of half grabens geometry have developed in the area depicting bookshelf geometry of an extensional system Wrench fault system is found to be absent with exception of a probable strike-slip fault in the Kadanwari Field. The fields are interpreted to have significant recoverable reserves of 1662 (bcf) equivalents to 280 (mmboe) in tilted fault blocks having an average displacement of about 50 m. Keywords Extensional system . Bookshelf geometry . Half grabens
Introduction The study area of Miano and Kadanwari Fields lies between latitude 27° 10' 0"–27° 24' 42" N and longitude 69° 19' 0"–69° 19' 16" E (Fig. 1). Tectonically the area lies in the Central Indus Basin along the western margin of the Indian Plate,
Responsible Editor: Abdullah M. Al-Amri * Saif-Ur-Rehman K. Jadoon [email protected] 1
Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China
2
Department of Earth Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan
3
Centre of Excellence in Tibetan Plateau Research, Beijing, China
4
Directorate General of Petroleum Concessions, Islamabad, Pakistan
between two regional highs, i.e., the Mari-Kandhkot High to the northeast and the Jacobabad-Khairpur High to the southwest. The Thar Desert lies in its south, and the Delhi A
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