H Gerivani; N Hafezi Moghaddas; E Haghshenas; E Abdollahi Fard
Abstract
Notwithstanding geological and geophysical surveys and studies for hydrocarbon reservoir detection cost very much, those have lots of uncertainties. Then, engineers and scientists try to find and use new methods. Recently, some studies have suggested using ambient noise as a tool for hydrocarbon reservoir ...
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Notwithstanding geological and geophysical surveys and studies for hydrocarbon reservoir detection cost very much, those have lots of uncertainties. Then, engineers and scientists try to find and use new methods. Recently, some studies have suggested using ambient noise as a tool for hydrocarbon reservoir investigation. This new passive seismic technique, named HyMas, is based on the positive energy anomaly in data spectra between 1 to 6 Hz for microtremor measurements over reservoirs, which are called hydrocarbon microtremors. Despite the acceptable results obtained by the HyMas technique, there are many unknowns, especially concerning the source and generation mechanism of hydrocarbon microtremors and the relations between reservoir characteristics and the attributes of hydrocarbon microtremors. In this study, it has been tried to review the published experiences and studies and conclude the results and findings.
F. Askari; H. Garivani
Abstract
Tehran is the largest and the most populous city of Iran that have been recently regarded from the risk management point of view because of possibility of the earthquake damages. An important destructive phenomenon that may happen in Tehran during an earthquake is liquefaction. In the last ...
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Tehran is the largest and the most populous city of Iran that have been recently regarded from the risk management point of view because of possibility of the earthquake damages. An important destructive phenomenon that may happen in Tehran during an earthquake is liquefaction. In the last two decades, liquefaction of Tehran, especially its southern part, has been extensively studied. These studies are done in different scales and also with different methods. The goal of this paper is consideration of the most important studies which have been done in Tehran up to now and present a practical conclusion. The above mentioned studies are reviewed in the first part of the paper. After that, a network, divided into squares of 1Km×1Km, has been considered in southern part of the Tehran and liquefaction potential for every square of the network is evaluated. Finally, liquefaction hazard map for this part of the city is presented.
