There are quite a few factors affecting acoustic amplitude log in CBM well cementing,such as larger change of strata hardness,uneven casing inside diameter or thickness,instrument out of alignment,insufficient transmitting energy and insufficient receiving sensitiveness etc.
影响煤层气固井声幅测井的因素较多,如地层软硬变化大、套管内径或壁厚不均、仪器不居中、发射能量不足、接收灵敏度不够等,这些因素的存在将会导致首波丢失、时差曲线产生周波跳跃或波动现象。
