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Featured researches published by Howri Mansurbeg.


Eurasian Geography and Economics | 2014

Kurdistan Regional Government–Turkish energy relations: a complex partnership

Till F Paasche; Howri Mansurbeg

We analyze the Kurdish Regional Government’s (KRG’s) fast developing energy relationship with Turkey, its implications for Turkey’s energy security and, ultimately, regional security in general. Being landlocked, commentators tend to picture the KRG as a highly dependent entity, desperate to export its oil and gas through Turkey. While it is true that currently the KRG has no real alternative export routes other than Turkey, we argue that the energy relationship between the two is more complex than Turkey simply agreeing to this proposal as part of its energy diversification project. For Turkey, the dealings with the KRG present the next best thing to having its own oil and gas fields; high levels of control, partial ownership, and close proximity are all required by the country that is increasingly eking out its position as a regional patron. A further strong incentive for Turkey to develop this energy relationship is new opportunities to approach some of the country’s oldest and newest threats, the conflict with the Kurdistan Workers’ Party (PKK) and the developing PKK- influenced Kurdish movement in a fragmenting Syria.


Geological Society, London, Special Publications | 2016

Origin and evolution of microporosity in packstones and grainstones in a Lower Cretaceous carbonate reservoir, United Arab Emirates

Daniel Morad; Matteo Paganoni; Amena Al Harthi; Sadoon Morad; Andrea Ceriani; Howri Mansurbeg; Aisha Al Suwaidi; Ihsan S. Al-Aasm; Stephen N. Ehrenberg

Abstract Microporosity in carbonate reservoirs is generated by the complex interplay between depositional and diagenetic processes. This petrographical, SEM, fluid-inclusion and isotopic study of a Lower Cretaceous carbonate reservoir, Abu Dhabi, UAE, revealed that: (1) micritization of ooids and skeletal fragments, which resulted in spheroidal (rounded) micrite, accounts for most microporosity in peloidal packstones and grainstones; and (2) transformation of spheroidal micrite into subhedral/euhedral micrite and microspar, known as aggrading neomorphism, could happen via precipitation of syntaxial calcite overgrowths around micrite (micro-overgrowths) and not only, as suggested previously in the literature, by recrystallization involving the dissolution (of micrite) and reprecipitation (of microspar). Precipitation of calcite cement around micrite (i.e. destruction of microporosity) is more extensive in the water zone than in the oil zone, which is possibly contributing to the lower porosity and permeability of the carbonate reservoir in the water zone. Similarity in bulk oxygen isotopic values of micritized packstones and grainstones in the water and oil zones (average δ18OV-PDB = −7.2‰ and −7.8‰, respectively) is attributed to: (1) a small difference in temperatures between the crest (oil zone) and the flanks (water zone); and (2) calcite precipitation around micrite occurred prior and subsequent to oil emplacement. Bulk carbon and strontium isotopic compositions of micritized packstones and grainstones in the water and oil zones (average δ13CV-PDB = +3.7‰ and average 87Sr/86Sr ratios = 0.707469) indicate that calcite cement was derived from marine porewaters and/or dissolution of the host limestones. The minimum formation temperatures of bulk micrite/microspar, which are inferred based on paragenetic relationships, fluid-inclusion microthermometry and oxygen isotope data, are around 58–78°C.


Clay Minerals | 2011

Chloritization in Proterozoic granite from the Äspö Laboratory, southeastern Sweden: record of hydrothermal alterations and implications for nuclear waste storage

Sadoon Morad; Manhal Sirat; Mohamed Ali Kalefa El-ghali; Howri Mansurbeg

Abstract Hydrothermal alteration of Proterozoic granitic rocks in the Äspö underground laboratory, southestern Sweden, resulted in the formation of chlorite with large variations in textural and chemical characteristics, which reflect differences in formation temperatures, fluid composition, and reaction mechanisms. The mineral assemblage associated with chlorite, including Ca-Al silicates (prehnite, pumpellyite, epidote, and titanite), Fe-oxides, calcite, albite and K-feldspar, suggests that chloritization occurred at temperatures of between 200−350°C during various hydrothermal events primarily linked to magmatism and rock deformation. Petrographic and electron microprobe analyses revealed that chlorite replaced biotite, amphibole and magnetite, and hydrothermal chlorite phases filled fractures and vugs in the granitic rocks. While fracture-filling chlorite reduces fracture permeability, chloritization reactions in the host granite resulted in the formation of new localized microporosity that should thus be taken into consideration when evaluating the safety of the granitic basement rocks as a repository for nuclear waste. It is also important to take into account that similar alteration reactions may occur at the site of stored nuclear waste where temperatures in excess of 100ºC might be encountered.


GeoArabia | 2012

Impact of diagenesis on the spatial and temporal distribution of reservoir quality in the Jurassic Arab D and C members, offshore Abu Dhabi oilfield, United Arab Emirates

Sadoon Morad; Ihsan S. Al-Aasm; Fadi H. Nader; Andrea Ceriani; Marta Gasparrini; Howri Mansurbeg


Marine and Petroleum Geology | 2008

Diagenesis and reservoir quality evolution of palaeocene deep-water, marine sandstones, the Shetland-Faroes Basin, British continental shelf

Howri Mansurbeg; Sadoon Morad; A. Salem; R. Marfil; Mohamed Ali Kalefa El-ghali; Johan Petter Nystuen; M.A. Caja; Alessandro Amorosi; David Benavente García; A. La Iglesia


Sedimentary Geology | 2006

Distribution of diagenetic alterations in fluvial and paralic deposits within sequence stratigraphic framework: Evidence from the Petrohan Terrigenous Group and the Svidol Formation, Lower Triassic, NW Bulgaria

Mohamed Ali Kalefa El-ghali; Howri Mansurbeg; Sadoon Morad; Ihsan S. Al-Aasm; George Ajdanlisky


Basin Research | 2010

Provenance of siliciclastic and hybrid turbiditic arenites of the Eocene Hecho Group, Spanish Pyrenees: implications for the tectonic evolution of a foreland basin

M.A. Caja; R. Marfil; D. Garcia; Eduard Remacha; Sadoon Morad; Howri Mansurbeg; Alessandro Amorosi; C. Martínez-Calvo; R. Lahoz-Beltrá


Marine and Petroleum Geology | 2009

Diagenetic alterations related to marine transgression and regression in fluvial and shallow marine sandstones of the Triassic Buntsandstein and Keuper sequence, the Paris Basin, France

Mohamed Ali Kalefa El-ghali; Sadoon Morad; Howri Mansurbeg; M.A. Caja; Manhal Sirat; Neil Ogle


Marine and Petroleum Geology | 2012

Meteoric-water diagenesis in late Cretaceous canyon-fill turbidite reservoirs from the Espírito Santo Basin, eastern Brazil

Howri Mansurbeg; L. F. De Ros; Sadoon Morad; João Marcelo Ketzer; M. A. K. El-Ghali; M.A. Caja; Rushdy Othman


Journal of Sedimentary Research | 2009

Diagenetic Evolution and Porosity Destruction of Turbiditic Hybrid Arenites and Siliciclastic Sandstones of Foreland Basins: Evidence from the Eocene Hecho Group, Pyrenees, Spain

Howri Mansurbeg; M.A. Caja; R. Marfil; Sadoon Morad; Eduard Remacha; David Benavente García; T. Martín-Crespo; Mohamed Ali Kalefa El-ghali; Johan Petter Nystuen

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M.A. Caja

Complutense University of Madrid

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R. Marfil

Complutense University of Madrid

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Neil Ogle

Queen's University Belfast

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Eduard Remacha

Autonomous University of Barcelona

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