基于宽脉冲子波的富低频气枪震源优化设计  

Optimization design of rich low frequency air gun source based on wide pulse wavelet

作　　者：吕丁友 张中巧 王志亮 贺电波 高磊 刘怀山[2] 杨宸 LÜDingYou;ZHANG ZhongQiao;WANG ZhiLiang;HE DianBo;GAO Lei;LIU HuaiShan;YANG Chen(Bohai Petroleum Institute,Tianjin Branch of CNOOC China Limited,Tianjin 300459,China;College of Marine Geosciences,Ocean University of China,Qingdao 266100,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459 [2]中国海洋大学海洋地球科学学院,青岛266100

出　　处：《地球物理学进展》2024年第3期1218-1227,共10页Progress in Geophysics

基　　金：中海石油(中国)有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术”(CNOOC-KJ135 ZDXM 36 TJ 08 TJ);国家自然科学基金项目(91958206)联合资助。

摘　　要：目前海洋勘探领域中震源系统的设计应用是影响高分辨率勘探的首要因素,空气枪因其稳定可靠的性能、形态一致的子波已成为实际生产中最为普遍应用的震源选择.气枪的子波是地震数据处理的主要分析对象,性能良好的子波能够极大提高数据分辨率,基于地震子波影响因素原理的分析,选取拥有更宽频带范围的宽脉冲子波,宽脉冲子波低频信息丰富,可以更好划分地层边界.基于非理想气体气枪子波模型,构造宽脉冲子波,通过大量的数据模拟,分析不同容量气枪延迟时间激发对子波的效果,构造优选的气枪阵列,设计更高分辨率的气枪震源.At present,the design and application of seismic source system is the primary factor affecting the high resolution exploration in the field of marine exploration.Air gun has become the most widely used seismic source selection in the actual production process because of its stable and reliable performance and consistent shape wavelet.The wavelet of air gun is the main analysis object of seismic data processing,and the wavelet with good performance can greatly improve the data resolution.Based on the analysis of the principle of influencing factors of seismic wavelet,the wide pulse wavelet with a wider band range is selected,and the wide pulse wavelet has rich low-frequency information,which can better divide the formation boundary.Based on the non-ideal gas air gun wavelet model,we construct broad-pulse wavelet,analyze the effect of delay time excitation of different capacity air guns on the wavelets through a large number of data simulations,construct the preferred air gun arrays,and design a higher resolution air gun seismic source.

关 键 词：容量 延迟激发 宽脉冲 低频 气枪震源 

分 类 号：P631[天文地球—地质矿产勘探] P738[天文地球—地质学]