高分辨率层序地层对比在河流相中的应用

APPLICATION OF BASE LEVEL PRINCIPLE IN PREDICTION OF LACUSTRINE RESERVOIRS

济阳坳陷北部胜海区上第三系馆陶组上段是以冲积河流相为主的沉积。利用岩芯资料的高分辨率，划分基准面短期旋回，分析相序特征；应用岩芯标定，建立测井资料的基准面旋回响应模型；通过井震对比，划分基准面中期旋回，并分析各地震相的地质意义。在此基础上，运用基准面旋回原理，建立高分辨率等时地层格架，研究河流层序发育特征与演化过程，预测主要产层段储层的空间分布。

Based on the principle of base level,three scales of stratigraphic cycles(short term, intermediate term and long term)could be identified through the analysis of cores,logs and seismic data.The stratigraphic cycles correspond respectively to different order base level cycles. Different types of facies successions occurred in different positions of the base level cycles. In light of the identification of multi order base level cycles,2 D high resolution sequence stratigraphic framework is established.Finally,a new proposal about favorable reservoir formations and hydrocarbon generation conditions in Qianliyuan Depression have been proposed.