Depth Positioning Method of Wel l Perforation Layer

Whatever method of perforation used,it is the must to set the perforating gun accuarately at the target formation. The accarate depth positioning for the gun fire at the perforated layer is used to be called the perforation depth calibration. Nowadays,the calibration method with a little variation are used by different fields. Referring to all kinds of using method,this paper introduce such methods on the basis of multiple well practice of the East China Sea.Factors influencing accuracy of calibration are analized and resolvement of those problems are supplied as well.