测井波阻抗曲线的建立及研究

Setting up and Study of the Logging Wave Impedance Curve

蔡循华 王荷萍 王建红 蔡洪正

CAI Xun-hua WANG He-ping WANG Jian-hong CAI Hong-zheng

上海海洋石油钻井工程公司, 上海 200137

Shanghai Offshore Petroleum Drilling Corporation, Shanghai 200137, China

根据东海西湖凹陷地质特点,利用测井信息中的密度和声波建立波阻抗曲线。当密度和时差因井眼扩大而失真时,可用自然伽玛和对应井深对密度和声波进行校正。根据统计得知在相近深度区间里,有着泥岩波阻抗值比砂岩波阻抗值大,含水砂岩波阻抗值比含油砂岩波阻抗值大的规律。

For the geological property of Xihu Trough Area in the East China Sea, density and sound wave in the logging data is used to set up the wave impedance curve. When the density and sound wave were fuzzy because of enlarged well, we can utilize the gamma-ray and relative depth to adjust them. According to statistic data, it is rule that the value of wave impedance of shale is more than sandstone, and the value of wave impedance of water-bearing sandstone is more than oil-bearing sandstone in the near depth.