基于解释量版的渤海油田巨厚砂砾岩定量表征

渤海油田古近系三角洲沉积发育巨厚（大于100 m）的砂岩和砾岩储层，储层横向变化快，内部非均质性强，地震预测难题大。文章针对此类问题，提出一种基于厚度解释量版的砂砾岩定量表征方法。根据已有钻井资料建立井点处地质模型，结合已有地质资料分析储层可能的变化形式，形成地质模型库，对地质模型库进行正演获得相应的正演地震资料库，然后提取正演地震资料的反射振幅属性，建立不同砂砾岩变化形式下的厚度解释量版，最后提取实际地震资料的反射振幅属性，将其投射到厚度解释量版上，实现对巨厚砂砾岩储层的定量表征。该方法克服了常规地震反演、地震属性等方法难以有效刻画巨厚砂砾岩储层的难题，实现了对具有干涉效应的巨厚砂砾岩储层的厚度及其内部变化的精确定量表征。

Quantitative Thickness Characterization of Thick Glutenite ReservoirBased on Interpretation Chart in the Bohai Oilfield

The Paleogene delta deposits in the Bohai oilfield developed glutenite reservoirs with huge thickness (greater than 100 m), and seismic prediction of these reservoirs is difficult because of the quick lateral change and strong internal heterogeneities. To solve this problem, we propose a quantitative thickness characterization of thick glutenite reservoir based on interpretation chart in this study. Firstly, the geological model at well points was established according to the existing drilling data, and the possible reservoir change forms were analyzed by combining the existing geological data. Secondly, the geological model database was formed, and the database of corresponding forward seismic response was obtained by forward modeling. Then the seismic amplitude attributes were extracted, and the thickness interpretation chart, which represents the relation between the thickness and the seismic amplitude attributes of glutenite reservoirs, was established. Finally, the seismic amplitude attributes in the study area were extracted and projected onto the chart to characterize the quantitative thickness of thick glutenite reservoirs. This method overcomes the difficulty of conventional inversion and seismic attributes in effectively characterizing thick glutenite reservoirs. It can accurately and quantitatively characterize the thickness and internal variation of thick glutenite reservoir with interference effect.