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通过地层接触关系、岩性组合特征、岩石组分特征、物性变化特征及地层高频旋回样式分析,在靖边气田马五_(1—5)亚段识别出地层不整合面、海泛面和岩性界面等3种层序界面。以其为约束,将马五_(1—5)亚段划分为2个中期基准面旋回和15个短期基准面旋回,并建立了全区高分辨率等时地层对比格架。在地层格架内探讨了储层发育规律,表明储层分布宏观上受中期基准面升降变化控制,而优质储层(次生溶蚀孔洞缝型储层)主要处于中期旋回晚期的短期旋回中。
Based on the stratigraphic contact relationship, lithologic assemblage characteristics, lithofacies characteristics, physical property variation and strata high frequency gyration pattern analysis, unconformity surface, sea surface area And lithology interface, such as three kinds of sequence interface. Using this as a constraint, the Ma5-1 (1-5) subdivision is divided into two medium-term base-level cycles and 15 short-term base-level cycles, and a high-resolution isochronous stratigraphic contrasting framework has been established in the whole area. The development of reservoirs is discussed in the stratigraphic framework, indicating that the reservoir distribution is macroscopically controlled by the up-and-down variation of medium-term baselines, whereas the high-quality reservoirs (secondary dissolution cave-seam reservoirs) are mainly in the short-term cycles of the mid-term cycle.