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东营凹陷的前期研究成果表明,该区储层存在着厚度薄、变化大且灰质含量高的特点,仅从常规地震剖面上,砂体与灰质泥岩的地震反射特征难以区分,给预测有效砂体及流体造成了严重影响,且叠后波阻抗反演无法识别灰质发育区的有效储层.针对以上问题,对测井资料进行了岩石物理参数敏感性分析,明确了灰质发育区浊积岩有效储层岩石物理特征,即横波阻抗可区分高阻储层与非储层,纵波阻抗可剔除高阻储层中的灰质,在前两参数优选出的有效储层基础上,纵横波速度比可区分流体类型.实际工区叠前同时反演结果与岩石物理分析及完钻开发结果吻合较好,说明利用叠前同时反演方法能有效剔除灰质对浊积岩有效储层预测的影响,亦能识别有效储层中的流体类型.
The results of previous studies in Dongying depression indicate that the reservoirs in this area are characterized by thin thickness, large variation and high content of gray matter. It is difficult to distinguish the seismic reflection characteristics of sandstone and limestone mudstone from conventional seismic profiles, And fluid, and the inversion of poststack wave impedance can not identify the effective reservoirs in gray matter development area.According to the above problems, the petrophysical parameter sensitivity analysis of well logging data is made and the turbidites in gray matter development area are validated The reservoir petrophysical characteristics, that is, the shear wave impedance distinguishes between high-resistivity reservoirs and non-reservoirs, and the P-wave impedance excludes the gray matter in the high-resistivity reservoirs. Based on the effective reservoirs preferred by the first two parameters, the P- Which can distinguish the fluid types.The results of prestack simultaneous inversion in actual work area are in good agreement with the petrophysical analysis and drilling development results, which shows that the effect of gray matter on the effective reservoir prediction of turbidite can be effectively eliminated by the prestack simultaneous inversion method. Identify the type of fluid in the effective reservoir.