Paleogeography and Sequence Stratigraphy in Dariyan Carbonate Reservoir, NE Shiraz

Abstract

Zagros Basin is a very important hydrocarbon region in the Iran and World. One of the major reservoirs in this basin is the Lower Cretaceous Dariyan Formation. Based on petrographic studies, 9 microfacies were determined and interpreted as related to lagoon, barrier island and open marine environments. Facies associations show deposition in a carbonate ramp. Sequence stratigraphy studies show two sequences, each one with a transgressive system tract, marked by open marine microfacies, and then a retrogradational highstand, marked by barrier and lagoonal facies. Paleogeography and sequence stratigraphy studies of this formation and correlation of it with other sections may provide useful information about reservoir characterizations.

Classification of rock types using multivariate analysis in the Dezak area, SW Iran

“…Darian is the most important reservoir in the Zagros basin for hydrocarbon accumulations southwest of Iran [27]. The Shaiba Formation south of Persian Gulf can be considered a similar formation located in the countries in this region [30,37]. The Darian Formation includes about 286.5-m-thick brown-gray limestone abundant with orbitalina [33].…”