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地层岩相组合有规律地分布于层序的不同体系域。为了有效地进行储层发育、烃源岩分布的预测,文中提出层序构型的明确概念、类型、识别标志及其意义。层序构型是指三级层序内不同体系域地层单元时间-空间组成配置关系,其类型可分为L型、T型、TH型、H型(E-H型和L-H型)4种,其中,L型层序主要为富砂层序,储层相对发育;T型层序为富泥层序,烃源岩最为发育;TH型层序为富泥层序,烃源岩相对发育;E-H型层序为富泥层序,烃源岩发育程度次于TH型层序;L-H型层序主要为富砂层序,储层相对发育。珠江口盆地富烃的惠州凹陷文昌组层序构型实例分析表明,惠州凹陷南缘主要为T型层序,烃源岩相对发育,北缘主要为H型层序,储层相对发育。
The stratigraphic facies assemblages are regularly distributed in different system domains of the sequence. In order to effectively predict the distribution of source rock and reservoir development, a clear concept, type, identification mark and its significance of sequence configuration are proposed. The sequence configuration refers to the time-space compositional arrangement of stratigraphic units of different system stratigraphy in the third-order sequence. There are four types of stratigraphic units: L type, T type, TH type and H type (EH type and LH type) , The L-type sequence is mainly sand-rich sequence and the reservoir is relatively developed; the T-sequence is mud-rich sequence with the most developed source rock; TH-type sequence is mud-rich sequence with relatively developed source rocks; EH Type sequence is rich mud sequence, hydrocarbon source rock development degree is lower than TH sequence; LH sequence is mainly sand-rich sequence and reservoir relatively developed. The case study of the Wenchang Formation in the Huizhou Sag of the Pearl River Mouth Basin shows that the southern margin of the Huizhou Sag is mainly T-type sequence with relatively developed source rocks, H-type sequence and relatively well-developed reservoirs in the northern margin.