基于CRP道集的频宽一致性子波反褶积技术  

Wavelet deconvolution with spatial consistency based on CRP gathers

作　　者：明君 刘力辉[2] 丁燕[2] 李聪[2] 

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300452 [2]北京诺克斯达石油科技有限公司,北京100192

出　　处：《岩性油气藏》2015年第6期97-103,共7页Lithologic Reservoirs

基　　金：中国海洋石油总公司"十二五"科技重大专项"渤海典型低孔低渗油藏勘探开发关键技术研究与实践"(编号:CNOOC-KJ-125-ZDXM-07)资助

摘　　要：将叠后复赛谱域子波提取技术用于叠前CRP道集子波提取和叠前提高分辨率处理时,由于道集内远近偏移距道频宽不一致,影响了子波的空间一致性,也影响了叠前子波反褶积提高分辨率的效果。为此,对复赛谱域子波提取技术进行了改进,使其提取的子波具有空间一致性,并将改进后的复赛谱域子波提取技术与道集谱平衡技术相结合,形成了一种道集内频宽一致性子波反褶积技术。该技术增加了子波反褶积希望输出的人为定义,使其能适应低信噪比资料的叠前提高分辨率处理。When poststack wavelet extraction method of cepstrum domain is used for prestack wave extraction of CRP gathers and prestack raising resolution processing, the far and near bandwidth of the gather is not consistent, which influences the spatial consistency of wavelet and the effect of the resolution of prestack wavelet deconvolution. Therefore,this paper improved the wavelet extraction technology by using multi-cepstrum average, made the extraction wavelets have spatial consistency, and combined this improved wavelet extraction technology of cepstrum domain with spectral balance technology, to form a wavelet extraction technology which can keep the bandwidth consistent between the traces.This technology added artificial definition of the output of wavelet deconvolution, which makes it can adapt to prestack extraction frequency processing of the data with low signal to noise ratio.

关 键 词：复赛谱域子波提取 谱平衡 频宽一致的子波反褶积 叠前提高分辨率 

分 类 号：P631.43[天文地球—地质矿产勘探]