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胡文祥,史学兰,等.套管井短源距全波测井实验研究.测井技术,1997,21(5):329~334针对短源距固井质量评价方法开展了实验模拟研究。物理模型按10∶1缩小,并制作了相应的缩小换能器。实验结果表明,当一界面存在流体环隙时,相对自由套管情形,套管波在幅度减弱的同时,频率显著增大;一、二界面水泥胶结的缺陷或环空水泥的缺失均导致后续导波的持续振荡;而环空水泥的缺失量的大小与套管波幅度最为密切,二者为三次函数关系,研究结果认为,在一定的井眼和套管尺寸条件下,用套管波幅度评价环空水泥缺失量是恰当的;一界面的评价仅用套管波幅度或衰减是不准确的,最好利用整个套管波列;而以前所未利用的后续导波的幅度对于环空水泥胶结缺陷有明显的指示作用,是一种值得利用的信息。
Hu Wenxiang, Shi Xuelan, and so on. Experimental study on short wave distance and full wave logging in cased hole. Logging Technology, 1997,21 (5): 329 ~ 334 Experimental simulation is carried out to evaluate the quality of short-distance cementing. The physical model is reduced by 10: 1 and a corresponding reduction transducer is made. The experimental results show that when there is a fluid annulus at one interface, the frequency of casing wave increases significantly when the amplitude decreases and the casing wave is relatively free. The defects of cement cementation or the lack of annular cement in the first and second interfaces all lead to the follow-up And the continuous oscillation of the guided wave. However, the size of the annulus cement is the most closely related to the amplitude of the casing wave, and the relationship between them is a cubic function. The results show that under certain borehole and casing dimensions, Amplitude evaluation of annular cement loss is appropriate; an interface evaluation using only casing wave amplitude or attenuation is inaccurate and it is best to use the entire casing wave train; and the magnitude of the unutilized pilot wave Empty cement bond defects have a clear indication of the role, is a worthwhile use of information.