First Successfull Implementation Of High Temperature Video Camera to Identify Downhole Obstructions in Gas Wells: A Saudi Case

Abstract

Video cameras have been used in the oil industry with high success rate reported by several operating companies around the world. However, High downhole temperatures especially in gas wells have always posed a limitation to the full utilization of the camera as a diagnostic tool. Previous trials with the camera were prematurely aborted as internally it tends to heat up quickly allowing no time to carry out the full diagnosis of the restriction. However since the camera has gone through extensive modifications and has been equipped with the necessary capabilities to withstand high downhole temperatures. Picture resolution, re-fresh rate, LED intensity and tool rotation can be controlled at surface by the operator. Well deviation, high side and internal tool temperature are among the parameters displayed at E-line Cabinet on surface. This paper documents a successful operational experience of the first HT run in Saudi Arabia using this type of downhole camera. E-Line High Temp camera was deployed in gas well in attempt to determine the cause of an unpassable obstruction. Several measures to diagnose the nature of this obstruction were attempted using series of gauge cutter runs but with no success. The High Temp camera was mobilized in an attempt to finally discover the severity and extent of this obstruction. The operation using the downhole camera was carried out successfully achieving the desired objective of the intervention. The interpretation of the images indicated that the well had some kind of mineral build-up which looks to be solid in appearance indicating scale or cement materials.