用纵波方位角分析估计HTI介质的密度和裂缝方向

Diana Marcela Cortes Gómez, W. Zambrano, L. A. M. Vides
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引用次数: 4

摘要

在与裂缝相关的水平横向各向同性(HTI)介质中,正常向外移动(NMO)速度随方位角呈椭圆形变化。椭圆的长轴表示骨折的方向。同样,密度由轴比定义。我们提出了一种估算裂缝参数的方法,该方法基于在两条正交的共中点地震线上测量的NMO时间的差异。利用合成数据对该方法进行了测试,然后将其应用于Tenerife油田La Luna组的地震数据中,提供了裂缝的方向和估计密度。通过分析该油田附近井的全孔径地层微成像仪FMI测井资料,验证了结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Estimation of density and fracture orientation in HTI media through azimuth alanalysis of P-waves
In a medium with Horizontal Transverse Isotropy (HTI) associated with fractures, Normal Move Out (NMO) velocity varies ellipsoidally with the azimuth. The major axis of the ellipse indicates the direction of the fractures. Also, density is defined by the axial ratio. We are presenting a methodology to estimate fracture parameters based on the difference of NMO times measured in two orthogonal common midpoint seismic lines. The method was tested with synthetic data and then applied in seismic data of the La Luna Formation in the Tenerife Field, providing the orientation of the fractures as well as an estimated density. Results were validated by analysis of Fullbore Formation Microimager FMI logs acquired in wells in the vicinity of the Field.
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