摘要：In this paper, we propose a hybrid PML (H-PML) combining the normal absorption factor of convolutional PML (C-PML) with tangential absorption factor of Mutiaxial PML (M-PML). The H-PML boundary conditions can better suppress the numerical instability in some extreme models. and the computational speed of finite-element method and the dynamic range are greatly increased using this HPML. We use the finiteelement method with a hybrid PML to model the acoustic reflection of the interface when wireline and well logging while drilling (LWD), in a formation with a reflector outside the borehole. The simulation results suggests that the PS- and SP- reflected waves arrive at the same time when the inclination between the well and the outer interface is zero, and the difference in arrival times increases with increasing dip angle. When there are fractures outside the well, the reflection signal is clearer in the subsequent reflection waves and may be used to identify the fractured zone. The difference between the dominant wavelength and the model scale shows that LWD reflection logging data are of higher resolution and quality than wireline acoustic reflection logging.

关键字：Frequency domain finite-element method hybrid PML boundary wireline well logging logging while drilling

ISSN号：1672-7975

卷、期、页：卷: 15 期: 1 页: 35-45

发表日期：2018-03-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）,CSCD（中国科技引文期刊）（核心）,ESI（基本科学指标数据库）

发表期刊名称：Applied Geophysics

参与作者：张阔,张晓亮

通讯作者：刘鹤

第一作者：王兵,陶果

论文类型：期刊论文

论文概要：王兵,张阔,陶果,刘鹤,张晓亮，Acoustic reflection well logging modeling using the frequency-domain finite-element method with a hybrid PML，Applied Geophysics，2018，卷: 15 期: 1 页: 35-45

论文题目：Acoustic reflection well logging modeling using the frequency-domain finite-element method with a hybrid PML