Structural study of Nahr Umr Oil Field in Southern Iraq

Shakir Al-kubaisi, Manal; Adil Lazim, Aymen

	Structural study of Nahr Umr Oil Field in Southern Iraq
Journal of Petroleum Research & Studies
Article 1, Volume 120, Issue 12, 2016, Pages 27-46
Authors
Manal Shakir Al-kubaisi; Aymen Adil Lazim
Abstract
Nahr Umr oil field is one of the important productive southern Iraqi oil fields. This study focuses on the type of fold and faults of the Nahr Umr oil field. A structural analysis (geometric and genetic analyses) performed to identify its type, origin and to find its relevance to main regional tectonic events. The structural classifications employed well and geophysical data through using structure contour maps, cross sections, and seismic section. The structural analysis inferred that fold of Nahr Umr oil field classified as antiform, upright, non-plunge, gentle, supratenous, dome feature, and asymmetrical. The limbs are unequal whereas the length of left limb shorter than the right limb and its dip is greater than right limb. In addition, the thickness of crest is less than the thickness of limbs. Pattern of faults classified as compound, parallel, conjugates and radial with graben structure and these faults concentrated on crest of fold. The fold axis is almost N-S at early cretaceous and then clearly turns to NW-SE and this may due to counterclockwise rotation of Arabian plate. Geophysical interpretations and results of structural analysis stated that Nahr Umr oil field formed by three combined forces which are tectonic movements, reactivated basement, and salt structures.
Keywords
Nahr Umr field; Structural Analysis; salt structure; basement fault; tectonic movement

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