摘要
FAVO (即不同频率域AVO效应,应用方法为不同频率域进行AVO反演。)理论上可以实现,目前大部分实验都是基于单点及二维线,本次在二连探区W区块进行了三维数据域FAVO的实验。首先针对OVT数据的360˚方位进行炮检距分析,选取炮检距覆盖区域进行同相轴一致性处理。其次,分方位、分角度进行部分资料叠加,通过对各个部分叠加资料进行区内井合成记录标定,提取井旁道的地震子波,进行各向异性反演。再次,根据各向异性反演结果与该区目的层段断裂系统进行叠合对比,确定了该区裂缝的主要发育方向。最后,对裂缝的主要发育方向道集进行频带分析,并在有效频带进行不同频带及全频带AVO反演。各个频率带AVO反演结果与实际钻井进行对比分析,发现方位120~150˚低频段AVO反演结果与钻井实际情况吻合最好。
FAVO (That is, AVO effect in different frequency domains, the application method is AVO inversion in different frequency domains.) can be realized theoretically. At present, most experiments are based on single point and two-dimensional line. The experiment of FAVO in 3D seismic data was carried out in W block of Erlian exploration area. Firstly, the 360˚ offset information of OVT data is analyzed, and the phase axis consistency processing is carried out in the information density uniform area. Secondly, the partial data of azimuth and angle are stacked, and the anisotropic inversion is carried out by calibrating the synthetic record of each part of the data and extracting the seismic wavelet of the well side channel. Thirdly, according to the superposition comparison between the anisotropic inversion results and the fault system of this layer in this area, the main development direction of fractures is determined. Finally, the frequency band analysis is carried out in the main development direction of the fracture, and the frequency division and full frequency band AVO inversion are carried out in the effective frequency band. By comparing the AVO inversion results of the drilled wells with those of each AVO inversion, the AVO inversion results of the low frequency band in the azimuth of 120~150˚ are in good agreement with the drilling situation.
出处
《地球科学前沿（汉斯）》
2023年第9期1032-1039,共8页
Advances in Geosciences
