改进的地震相干体算法及其应用———以乌克兰顿涅茨盆地裂缝型储层为例
网络出版日期: 2013-09-26
Improvements of seismic coherence measure and an integrated use of this attribute for studying fracture reservoirs in the Donets Basin, Ukraine
Online published: 2013-09-26
杨雪飞 , 王兴志 , 张哨楠 , 张博文 , 胡顺庆 , 林刚 . 改进的地震相干体算法及其应用———以乌克兰顿涅茨盆地裂缝型储层为例[J]. 岩性油气藏, 2013 , 25(5) : 8 -12 . DOI: 10.3969/j.issn.1673-8926.2013.05.002
Seismic coherence is a popular attribute intended to image discontinuities caused by variations in structure, stratigraphy, lithology, porosity, and the presence of hydrocarbons. We improve the technology of computing and utilizing this attribute. After analyzing the relation of this attribute to the supposed mathematical model of seismic data, we present a newmethod for estimating coherence. It is based on a more realistic data model that permits arbitrary variations of both signal amplitudes and noise variances between the traces participating in coherence calculation. Moreover, a generalized approach to enhance the horizontal resolving power of any coherence measure is suggested. The newmethods are tested on synthetic data. Moreover, in combination with another seismic attribute, curvature, the new coherence measure is used for studying coalbed-methane-bearing fracture reservoirs in the Donets Basin ofUkraine.
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