Study of Fractures Characteristics and Porosity Types in the Reservoir Using Thin Sections, Core Description, FMI and Velocity Deviation Logs

Soleimani, B; Saedi, G; Charchi, A; Salarvand, E

doi:10.22071/gsj.2015.42209

Study of Fractures Characteristics and Porosity Types in the Reservoir Using Thin Sections, Core Description, FMI and Velocity Deviation Logs

Document Type : Original Research Paper

Authors

B Soleimani ¹

G Saedi ²

A Charchi ³

E Salarvand ⁴

¹ Professor, Department of Geology, Shahid Chamran University, Ahvaz, Iran

² M.Sc., Department of Geology, Shahid Chamran University, Ahvaz, Iran

³ Assistant Professor, Department of Geology, Shahid Chamran University, Ahvaz, Iran

⁴ M.Sc., National Iranian South Oil Company (NISOC), Ahvaz, Iran

10.22071/gsj.2015.42209

Abstract

Natural fractures analysis as a main controlling factor in fluid currents is very important in the reservoir characterization. This matter was studied using thin sections, cores, and FMI and velocity deviation logs in one of the fields in the southwestern of Iran. FMI initial data, which were input to Geoframe software, processed and interpreted. Velocity deviation logs and secondary porosity were also measured and compared. The results indicated that stylolites, pores, open and filled microfractures in the reservoir are present. The relative density of open fractures decreased to depth while filled fractures increased. The fractures are mainly longitudinal and latitudinal types with high angles to bedding surface. The main porosity system of the reservoir is inter particle and fractures types. According to the presence of oil staining in thin sections, it is revealed that the fractures are suitable conduits to transferring the fluid.

Keywords

fracture

FMI Image Log

Velocity Deviation Log

Secondary Porosity

Oil Field