摘要：The vertical aligned fractures are observed in the tight sandstone gas reservoir formation in Sichuan Basin, southwest China. They contribute to the permeability of the reservoir, and also result in the azimuthal anisotropy of seismic responses. PS-waves show a wider applicable offset range and a larger observable azimuthal anisotropy than PP-waves, and bottom PP-and PS-waves are less dependent on the offset than top PP- and PS-waves for fracture layer, respectively. The long axis of PP-wave fitted ellipse analysis, at near- and far-offset corresponds to fracture normal and strike, respectively, which shows a contrary result. However, unlike in PP-wave elliptical analysis, no matter near- or far-offset, the long axis of PSwave always point to a single direction (strike for watersaturated and normal for dry fracture), which can used to better analyze azimuthal anisotropy. So, offset range must be taken into account for picking amplitude of seismic data and elliptical analysis and the combination of the elliptic analysis of PP- and PS-waves can accurately determine the information of the fracture strike and density. © 2016 SEG.

ISSN号：1052-3812

卷、期、页：v 35,p2314-2318

发表日期：2016-01-01

期刊分区（SCI为中科院分区）：无

收录情况：EI（工程索引）,国际学术会议论文集

发表期刊名称：SEG Technical Program Expanded Abstracts

参与作者：Sun, Pengyuan

通讯作者：王鹏,张拓

第一作者：张峰,陈双全,李向阳

论文类型：会议论文

论文概要：王鹏,张峰,陈双全,李向阳,张拓,Sun, Pengyuan，The ODR-dependent attribute analysis of HTI media based on full azimthual gather: A synthetic study，SEG Technical Program Expanded Abstracts，2016，v 35,p2314-2318

论文题目：The ODR-dependent attribute analysis of HTI media based on full azimthual gather: A synthetic study