摘要
本文论述了中国沿海大陆架已发现油气藏的基本特征,油气藏的形成与分布规律,预测了含油气有利地区.著者强调复合油气田是中国沿海大陆架油气聚集的重要特征,概括了8种主要复合油气田类型,油气藏形成和分布,受沉积盆地类型和沉积构造演化历史所控制,有明显的规律性,各个沉积盆地又有其独特的主导因素.著者认为中国沿海大陆架虽然勘探程度很低,但有充分的依据说明,发现更多高富集、高产量油气田的前景是十分乐观的.
The author summarizes in this paper character of oil and gas fields ia Chinese continental shelf, discusses their formation and distribution, and points out prospective offshore areas for further exploration. The author's main points are presented as follows:
1.Offshore oil and gas fields discovered in China are predominantly anti-clinal, and structural-stratigraphic, with multiple payzones among which Mioc-ene Oligocene, Eocene Series and Palaeozoic carbonates are important. Those important ones except Eocene are distinguished by high production.
2.Consisting of petroleum pools of different types, oil and gas fields discovered are defined as composite oil and gas fields, and divided further into following 8 kinds:
a.composite field associated with draping structure.
b.composite field associated with growth anticline.
c.composite field associated with compressional anticline.
d.structural-stratigraphic composite field.
e.structural-lithologic composite field.
f.composite field associated with faalt block.
g.composite field associated with organic reef.
h. composite field associated with buried basement hill.
3.Geologie settings, particularly petroleum geologie characteristics dictate the formation and distribution of oil and gas fields in offshore China, which is outlined in the followings 5 aspects: a.three tectonic-sedimentary layer systems control the hydrocarbon distr-ibution.
b.each type of sedimentary basin is of its own oil and gas pool sequence and particular kinds of composite fields. The author established pool sequencss and composits field models for cratonic, epicontinental and back-arc basins.
c.it is emphasized that source sag is the basic unit which controls distri-bution of oil and gas fields. Moreover, the author summarizes significant char-acteristics of rich source sag and distribution of the fields in ir.
d.each sedimentary systeni eucompasses its particular kind of play. This paper presents summary of 7 kinds of plays as well.
e.upon analysis of several regional seals in continental shelf of China, it is believed that regional seal is a critical factor which affects formation of oil and gas field groups.
4. It is indicated that geologie settings exist for developnient of large-mi-ddle scale oil and gas fields in offshore China. Subsequently, the author points out 10 offshore blocks and specifically 21 structural zones which are relatively realistic to hunt for new fields.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
1989年第3期95-110,共16页
Marine Geology & Quaternary Geology
