YM区块低信噪比地震资料处理技术

英文篇名：THE PROCESSING TECHNIQUE OF SEISMIC DATA WITH LOW S/N RATIO AT YM BLOCK
中文刊名：物探化探计算技术
英文刊名：Computing Techniques for Geophysical and Geochemical Exploration
作者：张聪玲
英文作者：ZHANG Cong-ling (Deyang Branch Institute of E&P Research Institute SWPB SINOPEC ; Deyang Sichuan 618000 ; China).
中文关键词：低信噪比 ; 静校正 ; 去噪 ; 多次波衰减
英文关键词：low S/N ratio ; statics ; noise suppression ; multiple suppression
出版日期：2010-03-15
机构：中国石油化工股份有限公司西南油气分公司勘探开发研究院德阳分院;
年：2010
期：02
出版单位：物探化探计算技术

摘要

YM区块地表条件复杂,相对高差较大,原始资料品质差。通过对原始资料分析,该区块资料处理中存在静校正,提高信噪比,压制多次波三个难点。针对静校正问题,综合采用层析成像静校正,非线性综合全局寻优静校正,反射波自动剩余静校正,较好地解决了工区存在的静校正问题。对叠前叠后综合多种去噪方法,逐步提高了信噪比。综合分析多次波成因类型,道集内切结合叠后时变预测反褶积,逐步衰减多次波,保证了基底构造形态准确可靠。
At YM Block the surface condition is complex, and the elevation differences are big, and raw recording quality is poor. By analysis of raw data, three processing difficulties are as follows during processing: statics problem, improving S/N ratio and multiple suppression. Tomography statics and non-linear global optimization statics and reflection auto residual statics are applied to resolve the statics problem well at YM Block. Pre-stack and post-stack noise suppression methods are adopted to improve S/N ratio step by step. Analyzing the multiple types, combining internal muting with post-stack time variable predictive deconvolution, and multiples suppression step by step ensure the reliability of the basement structure shape.

引文

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