摘要
利用岩芯实验室测试数据、全波列测井数据和地震资料对莺琼盆地纵横波地震参数及衍生参数的变化规律进行了详尽地分析和研究。含气岩芯的刚性模量、纵横波速度比和泊松比比含盐水岩芯的低得多 ;砂岩的纵横波速度比和泊松比比泥岩的低得多。当地层埋深超过 25 0 0m时 ,纵横波速度比、泊松比基本不受深度的影响。岩石密度和孔隙度的相关性很好 ;含盐水岩芯的纵横波速度比与孔隙度的相关性很差 ;含气岩芯的纵横波速度比与孔隙度的相关性稍好于含盐水岩芯 ;
The relationships between the seismic responses and the correspond rock elastic properties are studied. The following data were used in the analysis: ① the core test data; ② all wave well logging information; ③ seismic data. The following results are obtained: ① For gas bearing core, the bulk modulus? Vp/Vs and Poisson ration are distinctly lower than those of the brine bearing core. ② The Velocity and Poisson ratio of sand are distinctly lower than that of shale .③ When the buried depth go beyond 2500 meters, the velocity and Poisson ratio of rocks show nearly no more change with the depth increasing further. ④ The correlation of rock density to porosity is very strong, while the correlation of the velocity ratio of brine bearing core to porosity be very poor. Moreover, the correlation of the velocity to porosity ratio of gas-bearing core is better than that of brine bearing core.
出处
《物探化探计算技术》
CAS
CSCD
2001年第4期308-313,332,共7页
Computing Techniques For Geophysical and Geochemical Exploration
