(Solved): Q. 4 It was decided to make perforation operation on a sandstone formation, the formation compressiv ...

Q. 4 It was decided to make perforation operation on a sandstone formation, the formation compressive strength is 8,500 psi. Before the perforation operation, the perforating charge was evaluated according to the API RP 43 Standard, the results of the test showed that the perforating charge penetrated the cemented drum which has a compressive strength of 12,000 psi with a penetration length of 16 cm . What is the expected depth of penetration for this charge in the sandstone formation?