套管外水气窜槽对首波的影响

讨论了形状相同、几何尺寸相同条件下含不同性质流体介质(水介质和气介质)的窜槽对声波测井的响应,以及首波能量与发收探头之间自由套管的面积之间的关系.实验结果表明,在形状、尺寸相同条件下,套管外为水窜槽时的首波幅度、首波能量随发收探头之间自由套管面积变化曲线的斜率都低于套管外为气窜槽时的幅度和斜率,而首波到达时间基本相同;套管外同时存在水气窜槽时,套管外为水时的首波幅度约为套管外为空气时幅度的0.8倍.

Effect of Water and Gas Saturated Channels Outside the Casing on First Arrival of CBL Responses

Mainly discussed are cement bond logging responses to channels of flow media (e.g. water and gas) with different properties but the same shape and geometry, and relationship between energy of the first arrival and free casing area against the interval between transmitter and receiver of CBL tool. The results of the experiment are, with the same shape and geometry, slope of the relationship curves between amplitude, energy of the first arrival of the water saturated channels and the free casing area is less than that of gas saturated channels. But both of them have the same arrival time; The first arrival amplitude of the water saturated channels is aproximately 0.8 time that of gas saturated channels when there exist water and gas saturated channels outside the casings.