摘要
针对深水地震资料,研究了海上气枪震源子波的混合相位特征及海浪引起的粗糙海平面对子波特征的影响,提出了基于地震初至提取地震子波的方法及零相位校正技术;利用谱比法提取等价常数Q值,对不同Q值统计平均并结合测井资料约束方法提炼最佳Q值,然后,利用改进的Hale算法进行反Q相位校正。南海北部实际资料应用分析表明,该零相位化技术提高了目的层地震资料的分辨率,明显提升了井震对比的相关度,提高了反演的精度,为后续的储层精细描述提供了可靠的地震资料。
In order to study the mixed phase characteristics of airgun wavelet and the influence of rough sea surface for wave- let characteristics in deep water seismic data, we proposed an extraction method for seismic wavelet based on first arrival and zero-phase correction technology. Then the spectral ratio method is used to extract the equivalent constant Q, to refine the best Q value by statistical average of different Q value combined with well constraint means, and to carry out inverse Q phase correction by the improved Hale algorithm. Application result of field data shows that the method improves the resolution of seismic data,especially in target layer,and significantly enhances the correlation between the seismic data and the synthetic records calculated from well, and improves the accuracy of the inversion. The application result in northern South China Sea can provide reliable seismic data for reservoir characterization.
出处
《石油物探》
EI
CSCD
北大核心
2015年第5期551-559,共9页
Geophysical Prospecting For Petroleum
