ofter adopt double-diameter casing structure.
地?zé)峋纫恍┨厥饩ǔ2捎蒙洗笙滦〉碾p徑套管串結(jié)構(gòu) ,常規(guī)的固井方法無法滿足該類井的固井要求。
The effects of casing diameter on acoustic log in cased-borehole at free pipe situation are investigated with finite element method(FEM).
數(shù)值計算例子表明,當(dāng)套管直徑增大時,套管波的幅度減小,視到時增大,主頻有明顯的降低。