List of Articles Open Access Article Abstract Page Full-Text 1 - Identification of Porosity Types and Geological Features of the Ilam Formation Based on FMI Image Logs, velocity deviation log and Petrographic Thin Section Data and in a Southwestern Iranian Field Hamed Amraei Open Access Article Abstract Page Full-Text 2 - Planktonic foraminiferal-based Biostratigraphy of Upper Cretaceous deposits with emphasis on the Cenomanian-Turonian and Cretaceous-Paleogene boundaries in the northeastern part of the Kabirkuh anticline, southeastern Ilam Sakineh Arefifard Noshin Moradi Lirkashasi Thomas Algeo Jonathan Schueth Lei Zhang Open Access Article Abstract Page Full-Text 3 - The importance of surface geochemistry studies in hydrocarbon reservoir exploration: with a case study from Khuzestan Province, SW Iran Zeinab Alizadeh Bahman Soleimani Behzad Khani Open Access Article Abstract Page Full-Text 4 - Stress field and pore pressure analyses using geometric investigation of gypsum veins in the Naft Sefid oil field anticline, SW Iran Babak Samani Open Access Article Abstract Page Full-Text 5 - Identification and separation of sedimentary cycles using Cyclolog software and the relationship of sedimentary cycles with stratigraphic-biostratigraphic time boundaries of Upper Eocene and Oligo-Miocene deposits in one of the wells of the Marun oil field Mohammad Goodarzi Open Access Article Abstract Page Full-Text 6 - The Impact of Diagenetic Processes on Reservoir Property Heterogeneity in the Upper Part of the Pabdeh Formation and the Lower Part of the Asmari Formation (Upper Eocene–Oligocene) within a Subsurface Section of the Marun Oil Field Mohammad Goodarzi Mostafa Sedaqgatneia