Research and Practice of Visual Detection Technology for Water Outlet Point of Oil Well 

Peng Hu1(&) , Shangwei Wang2,3, and Wanyin Liang2,3 

1 Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells, Xi’an 710065, China 2 Petroleum Technology Research Institute of PetroChina Changqing Oilfifield Company, Xi’an 710018, China 3 National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields, Xi’an 710018, China 

Abstract. The casing corrosion problem in Changqing Oil Region has long troubled oilfifield development which caused a serious loss of production capacity. For a large number of corroded perforated wells, the accurate identi- fification of the water outlet has always been a key technical problem in the process of casing damaged well management. In order to solve this technical problem, this paper presents a method of visualizing logging with nitrogen gas lift negative pressure to locate the water outlet point of casing damaged wells.