CAJ | 학술논문

速度分析是地震资料处理的重要环节,制作准确的速度谱,可为动校正提供可靠的速度资料,并最终决定叠加资料的质量.本文在对速度分析的基本估算方法和应用要素做系统的概括总结后,对面元细分与速度分析关系进行了详细的理论研究和实际资料的检验.理论模型数据和胜利油田永新工区高密度实际资料处理表明,面元细分对速度谱的主要影响是覆盖次数,覆盖次数较低时,要准确获知速度较难;覆盖次数增大,速度谱变好,但其精度并不按覆盖次数线性增大.要实现高密度资料分辨率品质的提高,必须提高检波器接收精度.
속도분석시지진자료처리적중요배절,제작준학적속도보,가위동교정제공가고적속도자료,병최종결정첩가자료적질량.본문재대속도분석적기본고산방법화응용요소주계통적개괄총결후,대면원세분여속도분석관계진행료상세적이론연구화실제자료적검험.이론모형수거화성리유전영신공구고밀도실제자료처리표명,면원세분대속도보적주요영향시복개차수,복개차수교저시,요준학획지속도교난;복개차수증대,속도보변호,단기정도병불안복개차수선성증대.요실현고밀도자료분변솔품질적제고,필수제고검파기접수정도.
Velocity analysis is an important procedure in seismic data processing.We can obtain accurate stack velocity using velocity analysis program to provide reliable velocity parameters for NMO,which ultimately determine the quality of stack sections.Based on the summary of recent velocity analysis methods and applying factors,we analyze the basic principle of velocity analysis and conduct test using synthetic and Yongxin high-density data of Shengli Oilfield to research the relation between bin-subdivision and velocity analysis.The results show that the most important effeCt of bin-divisible on velocity analysis is fold number.When the fold number is small,it is difficult to gain accurate velocity.While it is large,the velocity analysis results are better.However,the accuracy isn't linearly improved with fold numbers.In order to improve the resolution of high-density data,we should improve the receiving ability of geophones.