Investigation of the Effects of Fracture Orientation and Saturation on the Vp/Vs Ratio and Their Implications

被引：38

作者：

Ding, Pinbo ^{[1
,3
]}

Wang, Ding ^{[2
]}

Di, Guidong ^{[4
]}

Li, Xiangyang ^{[1
,3
]}

机构：

[1] China Univ Petr, State Key Lab Petr Resource & Prospecting, Beijing 102249, Peoples R China

[2] Shaoxing Univ, Ctr Rock Mech & Geohazards, Shaoxing 312000, Peoples R China

[3] China Univ Petr, CNPC Key Lab Geophys Explorat, Beijing 102249, Peoples R China

[4] PetroChina Southwest Oil & Gas Field Co, Chengdu 610051, Sichuan, Peoples R China

来源：

ROCK MECHANICS AND ROCK ENGINEERING | 2019年 / 52卷 / 09期

关键词：

Horizontal fracture; Vp; Vs ratio; Fluid saturation; Hydraulic fracture; SEISMIC ANISOTROPY; NETWORK PROPAGATION; NATURAL FRACTURES; WAVE-PROPAGATION; GAS-PRODUCTION; BEDDING-PLANE; SHALE; ROCKS; ATTENUATION; BASIN;

D O I：

10.1007/s00603-019-01770-3

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Fractures are widely distributed within the Earth's crust and have a substantial influence on wave propagation. Although many studies have been conducted on fracture characterization based on seismic anisotropic attributes, natural horizontal fractures and hydraulic fracture networks have yet to be characterized. Here, we investigate the influence of the fracture orientation and saturation on the Vp/Vs ratio via laboratory observations and theoretical modeling. Then, we discuss the feasibility of using the Vp/Vs ratio to predict natural horizontal fractures and evaluate hydraulic fracture networks. Our study demonstrates that an abnormally low Vp/Vs ratio, together with a lack of shear wave splitting, could be used to predict horizontal fractures. Fracture network development that results from hydraulic fracturing stimulation is associated with a much higher Vp/Vs ratio and no shear wave splitting; these two characteristics could be used to estimate fracture development and evaluate hydraulic fracturing stimulation.

引用

页码：3293 / 3304

页数：12

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