论凹陷类型与油气勘探--以渤海湾盆地为例

凹陷可分为长期发育型，早期发育型和晚期发育型三大类别，根据渤海湾盆地主要烃源层与石油窗或成熟油石油窗的相对位置关系，将长期发能型凹陷分为概念浅凹陷，概念中凹陷概念深凹陷，根据后期演变特点，将早期发育型凹陷分为衰退型，抬升型和残留型，根据基底的构造背景，将晚期发育型凹陷分为凹陷分割和凸起解体型，文章分析了不同凹现（亚类）油气生成聚集特征和资源丰度差异，认为凹陷分类是油气勘探不断深入的必然，尤其勘探初期具有重要意义。

On type of sags and exploration for oil and gas -taking Bohaiwan basin as an example

There are three types of sag: long?term development type, early development type and late development type. Long?term development type sag may be divided into conceptual shallow sag, conceptual middle sag and conceptual deep sag by the relative position between hydrocarbon source beds and oil window or oil window of mature oil. Early development type sag may be divided into waning type, uplift type and residual type sag according to the evolutional characteristics in late period. Late development type sag has sag segmentation type and arch breakup type. Generation and accumulation features of oil and gas and resource abundance difference in different types of sag (subtype) are analyzed in this paper. It shows that sag classification is the inevitable outcome of the continuous deepened exploration for oil and gas , especially at early stage of exploration.