Determination of Reservoir character of kangan & dalan formation in south pars gas field using wireline logs
Subject Areas :
میترا Nozari
1
(کارشناس ارشد زمین شناسی نفت دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران)
بهرام Movahed
2
(مدیر علوم زمین شرکت نفت و گاز دانا و مدرس دانشگاه)
S.H Vaziri
3
(استاد گروه زمین شناسی)
Keywords: Evaluation, south pars field , Kangan and Dalan formation , porosity , water saturation and petrophysical,
Abstract :
The south pars gas field is on of the southwestern fields of iran in zagros sedimentary basing andconsists of two kangan and dalan reservoirs . the Kangan and Dalan formations belong to Dehram Groupand are the most important gas reservoirs in Persian Gulf area . Petrophysical characteristics in the studiedwell were evaluated by the data of the well logs and Probabilistic method was used for petrophysical byGeolog 6.6 software . for an accurate evaluations , the necessary corrections were applied on logs byconsidering the places of wash out , environment effects , gas and shale effects . After that , the lithology ofthe Kangan and Dalan formations were determined by using of cross plot of neutron – density.Analysis of wire line data shows that the formation is basically limeston and in some part it is dolomite .on the based of Lithology , shale volume , presence of evaporate sediments and porosity , the Kanganformation has been zoned to and , and the Dalan formation has been zoned to and . The resultsshow that the zone of the Kangan formation and the zone of the Dalan formation have on apporiatereservoir in terms of gas saturation level, porosity and lithology as results porosity (PHIE) and watersaturation (SWE) were obtained 9/45% , 9/7% for kangan and 8/65% , 8/2% for Dalan formation inaverage , respectively .