By using and studying the different characteristics of Pabdeh and Gurpi formations, it is possible to check the hydrocarbon potential of the formations and their production power from different aspects. One of the most important characteristics of these formations is that the stone originates from the Zagros basin, and in some areas it plays the role of covering rock for the reservoirs of Bangistan. In this research, by using 44 palynological slides from 22 samples (evry sample 2 slides) of excavation fragments taken from these formations in the Mansouri field, it led to the identification and determination of the amount of organic matter in each palynological slide. Palynofacies of three main groups of marine palynomorphs, amorphous organic particles and phytoclasts were obtained, and palynological facies were identified from these groups. The samples are mainly in palynofacies type IX and VI and a few samples belong to palynofacies type II.. Examining the samples in terms of sedimentation environment indicates oxygen-free or low-oxygen conditions during sedimentation, at the same time phytoclasts decreased and the amount of amorphous organic materials and their preservation increased. Also, the number of 10 samples representing the palynofacies were selected to perform the Rock-eva‎l pyrolysis test according to the change in the percentage of palynological elements. The results of the Rock-eva‎l pyrolysis test of these samples confirm the information obtained from the palynofacies studies. The selected samples for the use of the first rock pyrolysis according to the values of S1, S2, S3, TOC, Tmax, HI and OI parameters showed that organic materials of marine origin prevailed and the examined van Krevelen diagram showed the presence of type II kerogen in them. This type of kerogen shows a very high oil production ability. Hydrocarbon detection by drawing the parameter diagrams of Rock-eva‎l pyrolysis device stated that samples number 2 from well 70 and 6 from well 50 show high oil production capacity and samples number 4 and 5 from well 26 in the window Gas production along with oil are negligible. The production potential of the rest of the samples, whose parameters had acceptable values, include oil with good production capacity and is generally determined from almost suitable to very good.

مرتضي طبايي

حمزه صادقي سرخني , محمدعلي صالحي