薄储层中转换波反射系数影响因素探讨  

Influence Factors of Converted Wave Reflection Coefficient in Thin Beds

作　　者：王筱[1] 李宁 曲洁[3] 

机构地区：[1]油气资源与勘查技术教育部重点实验室(长江大学),湖北荆州434023 [2]中石化中原油田分公司物探研究院,河南濮阳457001 [3]中石化河南油田勘探开发研究院,河南南阳473000

出　　处：《长江大学学报（自然科学版）》2011年第9期40-43,7,共4页Journal of Yangtze University(Natural Science Edition)

摘　　要：针对薄储层地震反射模型,讨论了薄层介质中弹性波的简化公式适用范围,并分析了薄层厚度、地层吸收的品质因子对转换波反射系数的影响。研究结果表明,该简化公式适用于薄层厚度小于1/4波长的情况,当薄层厚度小于1/4波长时,转换波的反射系数随薄层厚度增加而增加,在1/4波长处达到最大值。品质因子越小,转换波反射系数曲线越平滑。当中间层厚度比较大的时候,品质因子越大,转换波反射系数曲线波动越大。As for seismic reflection model of thin reservoir,we discuss the application of elastic wave's simplified formula,and analyze the impact of layer thickness and formation absorption quality on convert wave reflection coefficient.The results show that this simplified formula is suitable for less than 1/4 wavelength thin-bed thickness,while the thickness of thin layer is less than 1/4 wavelength,the converted-wave reflection coefficient increases with the thin thickness and reaches its maximum at 1/4 wavelength.The smaller the quality factor is,the smoother converted wave reflection coefficient curve is.When the thickness of middle-layer is relatively large,the greater the quality factor is,the greater the volatility of converted-wave reflection coefficient is.

关 键 词：薄储层 转换波 地层吸收 反射系数 

分 类 号：P631.4[天文地球—地质矿产勘探]