Using of Dual Laterolog to detect fracture parameters for Nubia Sandstone Formation in Rudeis-Sidri area, Gulf of Suez, Egypt

Fractures appear predominantly in brittle rocks; hence in consolidated formations they are usually sub-vertical and perpendicular to the plane of group of more or less parallel fractures. Vertical fractures refer to the high-angle events (parallel to the borehole) while the horizontal ones indicate the truly horizontal or sub-horizontal events. The unfractured parts of the block matrix in hard rocks are slightly affected by invasion. Added, fracture aperture was estimated using the Dual Laterolog (DLL), which includes the deep (LLD) and the shallow (LLS) resistivities.The area of study is Rudeis-Sidri area, Gulf of Suez, Egypt. Nine Wells were selected for applying the present technique to determine the reservoir performance of Nubia Sandstone Formation in the considered area. The technique depends on the separation between deep and shallow laterolog in case of vertical fracture and the sharp reduction of LLS log in case of horizontal fractures. In high-contrast formation the calculation of fracture aperture can be done if mud conductivity is also known. Also the dipping of the detected fracture is calculated to ensure the type of fracture. The obtained results show that the detected fractures are generally short vertical fractures with a few numbers in the Nubia Sandstone Formation which cannot be the main factor in production (if present) of this formation.