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Yemen
Re-imagining and re-imaging the development of the East African Rift
Organic-geochemistry characterization of the Paleogene to Neogene source rocks in the Sayhut subbasin, Gulf of Aden Basin, with emphasis on organic-matter input and petroleum-generation potential
BENTHIC FORAMINIFERAL PROXIES FOR POLLUTION MONITORING IN AL-MUKALLA COASTAL AREA, HADRAMOUT GOVERNATE, REPUBLIC OF YEMEN
Petroleum generation modeling of the organic-rich shales of Late Jurassic – Early Cretaceous succession from Mintaq-01 well in the Wadi Hajar sub-basin, Yemen
Early magmatism in the greater Red Sea rift: timing and significance
Formation of Mississippi Valley–type deposits linked to hydrocarbon generation in extensional tectonic settings: Evidence from the Jabali Zn-Pb-(Ag) deposit (Yemen)
THE NEW GENUS AZZAROLINA (FORAMINIFERA): THE FALSE TABERINA FROM THE PALEOCENE OF THE MIDDLE EAST
Upper mantle structure of the southern Arabian margin: Insights from teleseismic tomography
AUTOMATED SCANNING ELECTRON MICROSCOPY (QEMSCAN®)-BASED MINERAL IDENTIFICATION AND QUANTIFICATION OF THE JABALI Zn-Pb-Ag NONSULFIDE DEPOSIT (YEMEN)
Stratigraphy, thickness, tectonic environment, and economic implications of the giant Suwar – Wadi Qutabah layered mafic complex in northwestern Yemen
Abstract Basement rocks tend to have negligible primary (rock matrix) porosity and, where present, almost all porosity is fracture-related. An insight into fracture type and distribution is therefore of importance when attempting to predict potential flow zones in hydrocarbon reservoirs. In the absence of core, borehole images provide a proven means of characterizing fractures within basement rocks. This paper will concentrate upon the classification and characterization of basement structural elements, including fractures, faults and breccias, versus lithological elements, such as foliations and intrusion boundaries from borehole images. In addition, suggestions of how to differentiate present-day in-situ stress indicators from natural fractures will be made as these features may provide important information regarding open fracture set orientations. Examples of microresistivity and acoustic borehole images acquired in fractured igneous basement rocks from oil wells in Yemen will be presented together with a suggested methodology for their interpretation. The discussion will be based on hydrocarbon reservoirs; however, the methodology outlined can potentially have wider applications in, for example, groundwater pollution prevention schemes or groundwater extraction, radioactive waste disposal, geothermal energy resources and deep-drilling research programmes.