Seismic forward modeling for correction of fault shadow zones in Changyuan Oilfield, Daqing

被引：0
|
作者：
Jiang Y. [1 ]
Cheng S. [1 ]
Wang Y. [1 ]
Li C. [1 ]
机构：
[1] Research Institute of Exploration and Development, Daqing Oilfield Company, PetroChina, Daqing, 163712, Heilongjiang
来源：
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | 2019年 / 54卷 / 02期
关键词：
Changyuan Oilfield; Dense well pattern; Fault shadow zone; Fault throw; Low velocity zone;
D O I：
10.13810/j.cnki.issn.1000-7210.2019.02.010
中图分类号：
学科分类号：
摘要：
The footwall of large faults in Changyuan Oilfield, Daqing shows a triangular fault shadow zone on seismic sections. Seismic events of the shadow zones are often pulled up, pulled down, or uncontinuous, which lead to a great structural interpretation uncertainty. In order to quantitatively analyze characteristics of the fault shadow zone, a series of 2D forward models are built based on the geological information of the study area. According to our research, the fault shadow zones are caused by lateral velocity changes on both sides of faults, and fault throws and low velocity zones are the main influence factors of the fault shadow zone. The 3D space-variant velocity field is proposed to correct the fault shadow in dense well patterns, which improves effectively structural interpretation nearby the large fault and provides technical support for the future development of Changyuan Oilfield. © 2019, Editorial Department OIL GEOPHYSICAL PROSPECTING. All right reserved.
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页码：320 / 329
页数：9
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