Mohsen Ghorbankhani - Islamic Azad University, Omidieh Branch
Mahdi Bakhtbidar - Islamic Azad University, Omidieh Branch
Ladan Eskandarian - Amir Kabir Technical Univeristy
Pegah Rezaei - Islamic Azad University Ahwaz Branch

Perforation of Core Samples under High Pressure Conditions Objective: To simulate perforation under downhole conditions by applying axial andconfining pressures on sandstone and limestone core samples. Procedure: Initial tests were performed on cores of Berea sandstone and limestone under various conditions of axial, pore and confining pressures. For all cases, the laser settings remained the same. Full output power of 3.5 kW was applied continuously to each sample through the sapphire window of the pressure cell with a focused beam diameter of 0.889 cm (0.35 in)over 8.0 s. The amount of laser exposure time was calculated from previous laser rock interactions to allow penetration into the core without risk of penetrating the core’s full length and avoiding possible damage to the pressure cell.

Perforation, Laser, Sandstone,Limestone