井周声波扫描仪在测井过程中的影响因素分析

The Influence Factors of Circumferential Acoustic Scanning Tool-visualization in Logging Process

针对井周声波扫描仪在测井资料上存在的一些非常规现象的解释难点,文章简要介绍了井周声波扫描仪的工作原理并且从理论上分析了产生这些非常规现象的各种因素。对于每种非常规现象的影响因素如声波信号的频率、井眼内流体的衰减率、换能器与靶的距离、靶表面质地、靶的角度、靶(地层或套管壁)与井眼内流体声阻抗的差异程度都结合典型的现场资料进行充分的验证。通过这些方法,掌握和了解这些影响因素对录取和解释出优质的测井资料有一定帮助,对检测套损和水泥固井质量,提高检测精度有着积极的意义,从而应对随着石油工业的发展对裂缝测井技术提出的更高要求。

Aiming at the difficulties in interpretation of some unconventional phenomena exist in the logging data of CAST-V, This paper briefly introduces the working principle of CAST-V and the theoretical analysis of the various factors which cause these unconventional phe- nomena. The impact factors for each kind of unconventional phenomena such as acoustic signal frequency, the attenuation rate of wellbore fluid, the transducer and the distances of the target, the target surface texture, target angle, target （ stratum or casing wall material） are fully verified and the degree of difference between the wellbore fluid acoustic impedance are combined with field data of typical. Through these methods, grasp and understanding of these factors by logging data acquisition and interpretation of quality of some help. For the detec- tion of casing and cementing quality, there is a positive significance to improve the detection accuracy, so as to deal with the higher require- ments of the development of the petroleum industry put forward for crack logging technology.