1887

Abstract

Recent seismic surveys detected thick layer of free gas underlying hydrate bearing sediments through observation of direct seismic attributes in one of the Iranian deep waters. Furthermore, favorable geological condition is evidence of gas hydrate occurrence in the area of study. The gas hydrate stability zone (GHSZ) could be estimated either by bottom simulating reflector (BSR) horizon directly or by thermodynamic calculation of stability in sediments. However, thermodynamic calculations are subject to very large uncertainties and there is almost no model to quantify the impact of effective variables in stability calculations. In this paper we present a quantitative model of affecting variables on the thickness of the GHSZ within the study area, based on a conceptual model of the thickness of the GHSZ varying over a wide range of input variables and use it along with geophysical model of the thickness of the GHSZ for evaluation of the source of the gas in gas hydrate accumulations of the area. The results of this study indicated thermogenic gas components which reveal the existence of a conventional gas reservoir in deep depths of the study area.

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/content/papers/10.3997/2214-4609-pdb.340.P47
2013-03-18
2024-03-28
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.340.P47
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