Stratigraphic correlation and paleoenvironmental analysis of the hydrocarbon-bearing Early Miocene Euphrates and Jeribe
- PDF / 6,981,963 Bytes
- 15 Pages / 595.276 x 790.866 pts Page_size
- 38 Downloads / 170 Views
ORIGINAL PAPER
Stratigraphic correlation and paleoenvironmental analysis of the hydrocarbon-bearing Early Miocene Euphrates and Jeribe formations in the Zagros folded-thrust belt D. Hussein 1 & R. Collier 2 & J. A. Lawrence 3 & F. Rashid 4 & P. W. J. Glover 4 & P. Lorinczi 2 & D. H. Baban 1 Received: 26 February 2017 / Accepted: 11 December 2017 # Saudi Society for Geosciences 2017
Abstract The Lower Miocene Euphrates and Jeribe formations are considered as the main targets of the Tertiary petroleum system in the western part of the Zagros Basin. The formations consist of carbonates with some evaporate intercalations of the Dhiban Formation. This study utilized data from a field investigation including newly described outcrop sections and newly discovered productive oil fields within the Kirkuk embayment zone of the Zagros fold and thrust belt such as Sarqala and Kurdamir wells. This work is the first to show a stratigraphic correlation and paleoenvironmental interpretation by investigating both well data and new outcrop data. Three depositional environments were identified, (1) an inner and outer ramp belts environment, (2) shoal environment, and (3) restricted lagoon environment. Within these 3 environments, 12 microfacies were identified, based on the distribution of fauna mainly benthonic foraminifera, rock textures, and sedimentary structures. The inferred shallow water depths and variable salinities in both the Euphrates Formation and Jeribe Formation carbonates are consistent with deposition on the inner ramp (restricted lagoon and shoal) environments. Those found in the Euphrates Formation constrained the depositional environment to the restricted lagoon and shoal environment, while the microfacies in the Jeribe Formation provided evidence for an inner ramp and middle to outer ramp belt environments. This study represents the first detailed research that focuses on the stratigraphic correlation and changes in carbonate facies with the main aim to provide a wider understanding of stratigraphy of these carbonate reservoirs throughout the northern part of Iraq. Keywords Carbonate ramp . Paleoenvironments . Early Miocene carbonates . Zagros
Introduction The Zagros fold and thrust belt (ZFTB) has one of the largest petroleum reserves in the Middle East, which is characterized by multiple petroleum systems with a wide range of producing
* D. Hussein [email protected] 1
Geology Department, University of Suliamani, Kurdistan Region, Iraq
2
School of Earth and Environment, University of Leeds, Leeds, UK
3
Department of Civil and Environmental Engineering, Faculty of Engineering, Imperial College, London, UK
4
Oil, Gas and Energy Management Department, Charmo University, Kurdistan Region, Iraq
and potential reservoirs (Aqrawi et al. 2010; Jassim and Goff 2006). Reservoir systems are commonly found within the Cretaceous and Tertiary, as well as in the Triassic and Jurassic, most of which are considered to have producible reserves. Many wells have been drilled recently in the Kurdistan region of Iraq, and a
Data Loading...
