Image log in determination of Asmari reservoir fractures in one oil fields in the southwest of Iran

Understanding of oil and gas reservoirs is great help in maximizing hydrocarbon recovery. In the study of the characteristics of oil structures, the analysis of the fractures of reservoir rock in the stages of production and development of the field is very necessary. Nowadays, the use of mud loss modeling and image logs in helping accomplish this task is of great assistance to petrolium geologists. Since the most of Iran's reservoirs are carbonate type, investigation and analysis fractures, degree of fissures opening and porosity distribution in the Asmari reservoir field of study, It is one of the most effective factors in the production of hydrocarbons from this field. One of the best ways to identify and interpret geology in the well, using of the FMI illustrator is, which can create high quality images from the well. With the help of the images provided, can determine the types of fractures, porosity, the distribution of diagenetic porous spaces and the estimation of permeability trend. In this article, first, structure and Functionality of the FMI illustrator and then drilling and production problems in Asmari reservoir were evaluated and In the following, the functional role of the log in interpreting and determining the degree of fissures opening, porosity distribution and permeability level in 8 wells in Asmari reservoir, has been evaluated. In this study, analysis of Asmari reservoir fractures and how to expand these fractures in the reservoir By using mud loss modeling, interpretation of the FMI illustrator and the effect of these fractures was on the porosity and permeability of the reservoir. In this study, it has been determined that, fractures analysis in wells very good matching with drilling mud loss maps with rock basement faults at the has anticline of the Asmari reservoir.