%0 Journal Article %T Geochemical Investigation and Effect of Sedimentary Environment Changes on Pabdeh Formation Hydrocarbon Potentiality in Mansuri Oilfield %J Iranian Journal of Petroleum Geology %I Iranian Society Petroleum Geology %Z 2251-8738 %A بهرام علیزاده %A ندا جنت مکان %A هرمز قلاوند %A محمد حسین حیدری فرد %D 1395 %\ 1395/04/01 %V 4 %N 2 %P 1-10 %! Geochemical Investigation and Effect of Sedimentary Environment Changes on Pabdeh Formation Hydrocarbon Potentiality in Mansuri Oilfield %K hydrocarbon potential Pabdeh Formation Sedimentary environment Thermal History Modeling %K Mansuri Oilfield %X Pabdeh Formation is one of the most important probable source rocks in Mansuri oifield being under investigation . In this study, hydrocarbon potential of pabdeh formation is evaluated. Also effect of sedimentary environment changes on geochemical and hydrocarbon potential variation is studied ,To achieve this , hydrocarbon potential of Pabdeh Formation with Rock Eval Pyrolysis was investigated .Besides that, gas chromatography and gas chromatography-mass spectrometry data were utilized . Based on this study , in the Late Eocene age , relative sea level had raised , while in the Oligocene age, falling in sea level was occurred .Variation in sea level caused Pabdeh Formation to be heterogeneous in hydro carbon potential . Pabdeh Formation in Mansuri oilfield from geochemical aspects is divided into three divisions. Lower ad Upper zones I this formation, have fair (0.5-1%TOC) to good (1-2%TOC0 hydrocarbon potential and contain Kerogen type III. These zones have gas production potential . Middel zone, has very good (2-4%TOC) to excellent (TOC>4%) potential and contains Kerogen type II and III.Middel zone has oil production potential . Rock Eval data as well as thermal history modeling demonstrate that; Pabdeh Formaion is in early oil window, started yielding petroleum since 5-6 million years %U http://rimag.ir/fa/Article/33764