摘要：Fracture is one of the most important migration channels and accumulation spaces in hydrocarbon reservoirs. For unconventional hydrocarbon reservoirs, especially for shale reservoirs, the accurate prediction of fracture distribution can help improve the hydrocarbon production. With the development of seismic monitoring techniques, wide-azimuth acquisition and processing techniques are being increasingly used to describe the distribution of subsurface factures. The P-wave AVAZ inversion based on seismic anisotropy is one of the most important and commonly used methods for fracture prediction. In this paper, we develop an inversion algorithm to acquire the normal and tangential fracture weakness based on P-wave reflection anisotropy and wide-azimuth seismic data. The newly developed algorithm can effectively utilize the amplitude information of large offset data to retrieve the fracture weakness which is related to the fracture density and fluid fillings. Two synthetic data examples show that the fracture weakness can be accurately estimated by using the newly proposed AVAZ inversion method. Our inversion method can obtain reliable fracture identification results even when seismic data are contaminated by random noise, which demonstrates the reliability and noise resistance of the inversion method. Finally, the method is successfully applied to a 3-D physical model data with an equivalent area of 100 km². The predicted fracture distribution result is consistent with the designed physical model and is highly related to the locally geological structures of the target reservoir. Through synthetic and physical model data studies, we demonstrate that the proposed inversion method is an effective approach to directly evaluate the fracture distribution in the reservoir.
© 2019 Elsevier B.V.

ISSN号：0926-9851

卷、期、页：v 162,p184-193

发表日期：2019-03-01

期刊分区（SCI为中科院分区）：三区

收录情况：SCI（科学引文索引印刷版）,ESI（基本科学指标数据库）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：JOURNAL OF APPLIED GEOPHYSICS

参与作者：Shi, Peidong

通讯作者：王铁一

第一作者：袁三一,帅达,骆春妹,王尚旭

论文类型：期刊论文

论文概要：王铁一,袁三一,Shi, Peidong,帅达,骆春妹,王尚旭，AVAZ inversion for fracture weakness based on three-term Rüger equation，JOURNAL OF APPLIED GEOPHYSICS，2019，v 162,p184-193

论文题目：AVAZ inversion for fracture weakness based on three-term Rüger equation