Cement logs evaluation Ghadames Basin, (Al Wafa Gas field), case study, Libya

The acoustic logging method is the most commonly used to qualify a cement job. It can be run several hours or days after placement and evaluates quality of bond (acoustic coupling) between casing, formation. measures attenuation sound signal as it propagates through formation returns sensor. This technique will help spot free pipe, partially bonded fully pipe. aim this paper analyses logs data in two wells within Al Wafa Gas field, analysis results shown variables condition behind casing. well A24-NC169A, showing good for both casing signature very low amplitude reading due high waves bound log because was A56-NC169A, variable results, formation, micro- annual channeling condition. gamma- ray ranging from 40 150, sand shaly sediments, transit-time normal, recorded low, medium (18 56) different wave attenuated depending on (good cement). Variable density (Formation arrive, no arrive all In general, revealed