Flow units characterization of the Sarvak Formation in a sequence stratigraphic framework: a case study from an oil-field in the Abadan Plain, SW Iran

Sarvak Formation, as part of Bangestan group, is important for the production and exploration of hydrocarbons in the Zagros and Persian Gulf basins. In this study, for identifying flow units and interpreting reservoir quality changes in Sarvak Formation in the sequence stratigraphic framework, combining many data like core description, petrographic and porosity-permeability studies on core samples in one of the large field of the Abadan plain have been used. These data are including of 388m core samples, 420 microscopic thin sections and 800 porosity-permeability plugs from two key wells. Based on sequence stratigraphic side of view, the upper part of Sarvak Formation in the studied field can be divided in to tow 3rd order sequences. Based on the stratigraphic modified Lorenz plot (SMLP), flow units were identified and interpreted. Sequence stratigraphy and reservoir quality studies show that the best flow units are related to the middle and the upper part of high stand system tract and the middle of transgressive system tract. Packstone and rudstone related to the proximal open marine and also talus are the facieses associated with this system tract.