【作者】 李明娟； 张永贵； 郑和荣；

【Author】 LI Ming-juan, ZHANG Yong-gui, ZHENG He-rong (Exploration and Production Research Institute, SINOPEC, Beijing 100083, China)

【机构】 中国石化石油勘探开发研究院；

【摘要】 塔河南部盐下地区试油出水严重,油气水关系复杂。频率吸收衰减方法是基于小波变换理论的频谱分析方法。当储层中孔隙比较发育而且饱含油气时,地震波中高频能量衰减比低频能量衰减大,通过提取高频端的衰减梯度属性,可以间接地检测储层含油气特征。塔河南部地区中奥陶统一间房组为一套稳定碳酸盐岩沉积,采用衰减梯度技术能较好地反映碳酸盐岩储层中流体性质。通过对钻遇该区50多口井的统计分析发现,采用频率吸收衰减方法对区分干层、水层和油层效果良好,尤其对区分干层和流体,效果最佳。更多还原

【Abstract】 Because of serious water in formation testing, the relationship between oil-gas and water is complicated in Yanxia area of the south of Tahe oilfield. The frequency absorption attenuation method is a spectral analysis method based on wavelet transform. When reservoir is of high pore filled by oil-gas, the attenuation of high frequency power is more than that of low frequency power, the oil-gas of reservoir can be detected indirectly. Attenuation gradient technology can be used to detect fluid property in the limestone reservoir because the Yijianfang formation in the south of Tahe area is a stable deposition of limestone. By Statistical analysis results of more than 50 wells, the results show that the method is a relatively effective geophysical technique, it can be used to divide oil layer from the dry layer and aqueous layer, especially the identification of the dry layer and fluid layer.更多还原