Title

Preliminary study on the attenuation characteristics of seismic wave propagation in near surface layers of carbonate

outcropped area

单位

河南理工大学资源环境学院，河南焦作454000

Organization

Yun Meihou， Institute of Resources & Environment,Henan Polytechnic University,Jiaozuo 454000,Chin

摘要

碳酸盐岩裸露区地震采集资料信噪比低，成像质量差，地质构造解释困难已成为制约海相碳酸盐岩油气勘探

的技术瓶颈，因此，开展碳酸盐岩裸露区近地表地震波衰减特性研究对于揭示地震采集资料低品质的成因具有重

要的现实意义。以镇巴探区800余口井的微测井解释成果为基础，采用李庆忠经验公式估算了近地表地层品质因子

Q，进而分析了不同岩性出露区近地表衰减特性的差异性。结果表明，碳酸盐岩裸露区近地表地层平均品质因子明

显低于砂岩、泥岩和砂泥岩互层出露区，显示出较强的地震波衰减特性，其可能是造成碳酸盐岩裸露区地震采集

资料低品质的主要原因之一。

Abstract

In carbonate outcropped area,the seismic data is characterized by low signal-to-noise ratio,bad imaging and difficult in

structure interpretation,which have become the technical bottlenecks restricting oil-gas exploration of marine facies carbonate

reservoirs in China.Therfore,It has important and realistic significance to study the attenuation characteristics of seismic wave

propagation in near surface layers of carbonate outcropped area for analyzing the cause of low-quality seismic data.Based on

the explanation results of uphole data of more than 800 wells in Zhenba area,the quality factors of near surface layers were

estimated by Li Qingzhong’s experience formula,and then the difference of attenuation characteristics of near surface layers for

different lithology outcropped area were analyzed.As a consequent,the average quality factor of near surface layers in

carbonate outcropped area is significantly lower than that in the outcropped area of sandstone,mudstone and the

interbed,which displays stronger attenuation for seismic wave propagation and maybe one of the main causes for the low-

quality seismic data in the carbonate outcropped area.

关键词：

碳酸盐岩裸露区; 近地表; 地震波衰减; 品质因子; 微测井;

Keywords:

carbonate outcropped area; near surface; seismic wave attenuation; quality factor; uphole;

基金项目

DOI

碳酸盐岩裸露区近地表地震波衰减特性初探