SIMULATION TECHNIQUES OF EVALUATING CEMENTING QUALITY AND ITS APPLICATION

In consideration of the fact that serious casing failures caused by the factors of plastic flowing of salt bed and high in situ stress occurred in Zhongyuan Oilfield, TP130TT heavy collapsing resistant casing is developed. The heavy collapsing resistant casing of ?152.4 mm TP130TT with thick wall makes the abnormity of the acoustic amplitude-variable density logging which produces the new difficulty to evaluate the cementing quality.Based on the physical analog testing for evaluating cementing quality by the acoustic amplitude-variable density logging, it are obtained of the serial theory charts of logging interpretation with different cementing quality. And the new criterion for cementing quality interpretation is established. The charts can be used to resolve the cementing quality interpretation of thick wall casing.