论文部分内容阅读
馆上段是埕岛油田的主要含油层位,曲流河沉积,砂体变化快,常规小层对比方法难以准确识别地层层序。运用Cross高分辨率层序地层学原理,在馆上段识别出3个中期旋回,12个短期旋回,中期旋回和短期旋回均为非对称旋回,以上升半旋回大于下降半旋回为主。以短期旋回为基本单元,建立了高分辨率层序地层格架,对储层进行精细对比,分析了各中期旋回储层的发育特征。
The upper section of the pavilion is the main oil-bearing layer of Chengdao Oilfield. The meandering river deposits and the sand bodies change rapidly. It is difficult to accurately identify the sequence of strata by the conventional small-layer contrast method. Using Cross high-resolution sequence stratigraphy, three mid-term cycles and 12 short-term cycles are identified in the upper section of the pavilion. Both the mid-cycle and the short-term cycles are asymmetric cycles, with the ascending half-cycle greater than the half-cycles decreasing. Taking short-term cycles as the basic unit, a high-resolution sequence stratigraphic framework was established to finely compare the reservoirs and analyze the developmental characteristics of each medium-term cycle reservoir.