THE EFFECT OF WEST QURNA OILFIELD ON THE PART OF EUPHRATES RIVER, NORTHERN BASRA GOVERNORATE, IRAQ: GEOMORPHIC AND STRUCTURAL GEOLOGY INTEGRATED ANALYSIS

  • Aymen Adil Lazim Geoscience Department, Zubair Field Operation Division, Basra Oil Company
  • Meelad Ali Hussein Faculty of Marine Science, University of Basra
  • Huda Fannoosh Khazaal Studies, Planning & Follow Division, Basra Oil Company
Keywords: West-Qurna Oilfield, Structural geology analysis, Neotectonic Movement, River Pattern, Sinuosity Index, Window Size.

Abstract

Abstract
The study utilized geomorphic and structural geology analysis integrated analysis to understand the effect of West Qurna Oil Field (or West Qurna Structure) on the part of Euphrates river route, whether it’s related to neotectonic activity or it’s a natural phenomenon. The Euphrates River Drainage Basin is located in the northern part of the Basra governorate in the south of the Mesopotamian Basin. The channel of the river is mostly straight and characterized by large loops. The channel sinuosity of this river system is analyzed in order to draw conclusions on the neotectonic activity of the region. The original status of the river thalweg was digitized from recent satellite images using the new Landsat 8 Scenes. Sinuosities at different sample section lengths were computed in a GIS software environment ArcGIS 10, providing so-called ‘sinuosity spectra’ for each point of the analyzed using a moving-window method and different window sizes channels. High sinuosity sections were correlated to geological subsurface structures of West Qurna Oil Field identified, indicating their neotectonic activity. A structural analysis (geometric and genetic analyses) performed to identify its type, origin and to find its relevance to main regional tectonic events. The geometric analysis detect that the bending fold mechanism (vertical force) could responsible about form West Qurna oil. Thus, thinning feature associated with West Qurna Oil Field. This mechanism could be connected with growth of salt structure of Hormuz Salt below it as confirmed by negative residual anomaly associated with West Qurna Oil Field.

Published
2020-03-30