Identification of Channel Type from Stratigraphic Traps based on Seismic Attributes: a Case Study from the Shurijeh Formation, One of Gas Field in North-east of Iran

Identifying and locating stratigraphic traps is more difficult than structural traps because they are dependent on facies changes and their distribution follow the condition of the basin and the sedimentary environment. Accordingly, the three - dimensional seismic data based on seismic attributes provide a better way to establish lateral relationships with geological features. The purpose of this research is to identify the stratigraphic meandering channels by applying appropriate attributes on seismic data. For this purpose, three dimensional data from one of the northeastern fields of the Iran were employed by using Petrel software. Afterwards, the relevant attributes were applied on the raw sections and their reservoir characteristics were interpreted and surveyed. Through stratigraphic interpretations, the geometrical position of the meandering channels located in the Shurijeh Formation was better revealed by the envelope and extended spectral decomposition attributes. The spectral decomposition attribute was effective in revealing the geometry of meandering channels in seismic sections, and the envelope attribute confirmed the existence of meandering channels by showing bright spots related to stratigraphic oil traps. These results show good agreement with the results of lithological, facies, reservoir properties, and petrophysical interpretations of Shurijeh Formation in the study area.