珠江口盆地珠海组-韩江组基准面旋回与储层非均质性的关系

珠江口盆地珠海组-韩江组储层为一套砂、泥互层的组合类型,储层非均质性较强,其中层内非均质性明显受基准面升、降和可容纳空间及沉积物供给量的变化影响.通过高分辨率层序地层的超短期基准面升、降旋回过程与储集物性关系的分析,建立了4种不同类型的非均质模式,探讨了向上变深非对称型和向上变深复变浅对称型超短期基准面旋回层序对储层非均质性特征的控制作用.

Control of stratigraphic sequence over the reservoir heterogeneity of the Zhuhai-Hanjiang Formation in the Zhujiangkou basin, China

The Zhuhai-Hanjiang Formation in the Zhijiangkou basin consists of a suite of interbedded sandstone and mudstone. Its reservoir heterogeneity is very strong, and especially the intrastratal heterogeneity is more serious. This is obviously influenced by the base-level up and down changings, pore space variation and sediment alimentation. Through analysing the relationship between the course of base-level up and down cycles of high resolution sequence of strata and the reservoir physical behavior, four heterogeneity models are founded. This paper discusses the deepening-upward and shallowing-upward non-symmetric and symmetric super-short-term base-level cyclic sequences and their control over the characters of the reservoir heterogeneity.