The multi-wave seismic acquisition method and applied result in Ken 71 area
垦71地区多波采集方法研究及应用效果

The S/N ratio and resolution of multi-wave multi-component seismic acquisition in Shengli prospect area are both lower several years,so the applied effect is not good.Therefore,we study the multi-wave acquisition techniques in Ken 71 area as the leading tentative zone.First,by analyzing the distribution of converted-wave with the help of single three-component geophone and conventional receivers area arrays,we obtain that the reflection of the converted interface is strong,and the feature of converted-wave is obvious,and the ratio of VS/VP is about 1/2;then,by doing the various array analysis of digital three-component geophone in laboratory,we stack the super-bins,and effectively improve the S/N ratio with little effect on resolution;finally,we use extended array of three-component geophone to design the optimum offset for converted-wave and use tracing shot perpendicular to the array to design the optimum off-line distance,and obtain the optimum layout parameters of multi-wave acquisition in the area.With the above reasonable design and various experiment studies in Ken 71 area,we obtain that the resolution of Z component section for digital geophone is obviously higher than that of P wave section for conventional receiver,which has great meanings for the identification of mini-fault and micro-structure; meanwhile,the strong energy of the converted waves,high S/N ratio and resolution make we acquire preferable effect in multi-wave acquisition.