Showing papers by "Abu Dhabi Company for Onshore Oil Operations published in 2002"

Ecological succession, palaeoenvironmental change, and depositional sequences of Barremian–Aptian shallow‐water carbonates in northern Oman

Abstract: Barremian and Aptian shallow-water carbonate facies (uppermost Lekhwair, Kharaib and Shuaiba Formations) are described from outcrops in northern Oman Based on facies analysis and bedding pattern, three orders of depositional sequences are defined (third to fifth order) and correlated between sections Over the course of three third-order sequences, covering the Barremian to Lower Aptian, a third-order depositional pattern is documented that consists of a succession of three distinct faunal assemblages: discoidal orbitolinids and calcareous algae were deposited during early transgression; microbialites and microencrusters dominate the late transgressive to early highstand facies; and a rudist- and miliolid-dominated facies is typical of the highstand This ecological succession was controlled largely by palaeoenvironmental changes, such as trophic level and clay influx, rather than sedimentological factors controlled by variations in accommodation space Orbitolinid beds and carbonates formed by microbialites and microencrusters seem to be the shallow-water carbonate response to global changes affecting Late Barremian to Aptian palaeoclimate and palaeoceanography

Feasibility of Combustion Turbine Inlet Air-Cooling in the Arabian Gulf Region

Abstract: Combustion turbine inlet air-cooling systems (CTIACS) have been implemented in various regions around the globe and have displayed proven results in terms of their effectiveness and economic feasibility. Nonetheless, these systems have been rarely employed in the Arabian Gulf region with such existing installations are still undergoing continuous evaluation. The main objective of this study is to highlight the associated benefits of employing a CTIACS option in UAE. This is achieved by first exploring the weather patterns in UAE in order to propose proper weather design conditions. Moreover, the impact of a CTIACS is presented, for a prescribed inlet air temperature, on the annual gross energy increase, average heat rate reduction, cooling load requirements and net power increase. Finally, a combustion turbine unit with a relatively small mass flow rate is shown to be very much feasible economically even upon reducing inlet air temperature below the ISO rating.Copyright © 2002 by ASME