中文摘要：

声波反射成像测井是利用阵列声波测井的反射波进行井旁构造成像的测井新方法,由于是从滑行波能量较强的阵列声波信号中来获得反射波,因此反射波的提取问题尤为重要,文中采用能使波场更加聚焦的高分辨率Radon变换来提取反射波.分析得出滑行波和反射波到时在阵列数据道情况下表现为线性或近似线性特征,因而采用线性Radon变换方法.首先分析了声反射成像测井不同数据道集的波场几何特征,得出滑行波和反射波在不同道集都表现有不同程度的视速度差异,为反射波提取提供了依据.传统的Radon变换采用的最小二乘法不能使同相轴在Radon域足够聚焦,结合最大熵原理和贝叶斯原理实现了线性高分辨率Radon变换,模型数据处理结果表明后者可以在较复杂条件下提取出期望的波场.采用高阶交错网格有限差分模拟得到软、硬地层声反射成像测井波场,处理结果表明,相对于最小二乘Radon变换,采用高分辨率Radon变换后可以使波场更加聚焦,能提取出高质量的反射波,并能适应不同性质地层,相比于目前应用较多的反射波提取方法,其结果更接近于理论波形.实际数据处理也表明了该方法的有效性和准确性.该方法在声反射成像测井的速度分析、数据道插值以及偶极反射波提取方面有一定潜力,需要进一步研究.

英文摘要：

Acoustic reflection imaging logging is a new method which utilizes the reflection of array acoustic logging to image the geological structure around the borehole.Under the effects of the strong slide wave,extracting the reflection from acoustic reflection imaging logging data is extremely difficult and important.A new method of wave field separation based on high resolution Radon transform is used to separate the reflected wave,as it can focus the different wave field in the Radon domain.Analysis of the arrival time of slide wave and reflected wave in different data gathers shows that they have a linear or approximately linear characteristic.Therefore,the linear Radon transform has been used in this paper.Firstly,the wave field geometry characteristics of different data gathers in acoustic reflection imaging logging are analyzed,the results indicate that the slide wave and the reflected wave have different apparent velocity in different gathers,which provide the basis for further reflection extraction.The traditional linear Radon transform cannot make the wave event focus enough in the Radon domain by using the least square method.The linear event in its Radon domain is mainly manifested as a scissor.Therefore,an improved algorithm is utilized by combining the principles of maximum entropy and Bayesian to achieve the high resolution Radon transform. The processing results of simulation data show that it can be used to extract the desired wave field in the complex conditions.Then a high-order staggered finite difference simulation is adopted to get acoustic reflection image logging wave data of soft and hard formation.The processing results of these data indicate that,compared to the least square Radon transform,the high resolution Radon transform can make the linear event be strongly focused in the Radon domain,which make it more easily to extract reflection.Compared to the methods used widely nowadays,the results are more close to the theoretical wave.Finally,a field data is processed by using high resolution Ra