A Quantitative analysis of reservoir heterogeneities of the Sarvak Formation in an oilfield from the Abadan Plain, SW Iran
This study focuses on reservoir heterogeneities of the Sarvak Formation in the Abadan Plain. Coefficient of variation (CV) and Dykstra-Parsons (VDP) approaches are used for quantification of reservoir heterogeneities. To define the hydraulic flow units, rock types, and reservoir zonation, flow zone indicator (FZI), Winland R35, and Lorenz (SMLP) methods are adopted. Heterogeneities of porosity and permeability data are quantified in each rock type, HFU and reservoir zone. Then, results of sedimentological studies are integrated with petrophysical data to analyze their scale, origins, and predictability in sequence stratigraphic framework. Depositional and diagenetic heterogeneities are differentiated. Facies variations and changes in textural characteristics and sedimentary structures provided small scale heterogeneities. Meteoric dissolution beneath the Cenomanian–Turonian palaeoexposure surface formed the best reservoir zone of the formation. Cementation and compaction, mostly related to burial diagenesis, reduced the reservoir quality. Results of this study indicate that large scale heterogeneities of the Sarvak Formation are predictable in the framework of third-order sequences. Meteorically dissolved rudist dominated facies provided the best productive zones in the regressive systems tract (RST) of the Cenomanian and Turonian sequences. However, small scale heterogeneities are not easily predictable in third-order depositional sequences and systems tracts.
-
Reservoir Characterization of the Ilam Formation using the Integrated Core Data and Petrophysical Logs in an Oilfield in the Abadan Plain, SW Iran
Saghar Sadat Ghoreyshi, *,
Petroleum Research, -
New Method for Modifying Winland Equation Using Well Log Data, Case Study of Kangan and Dalan Formations, the Central Persian Gulf
Shaghayegh Zarei Roodbaraki, *, Sogand Asadolahi Shad
Journal of Petroleum Geomechanics, Autumn 2024 -
Investigating the role of basement structures in controlling facies characteristics, depositional models, and diagenetic alterations of the Sarvak Formation in the eastern and western regions of the Persian Gulf
Marzieh Mahmoodi, *, Reza Nozaem
Stratigraphy and Sedimentology Researches,