摘要
深水沉积研究经历了50年,争论也持续了50年。从浊流及鲍玛序列开始,随着对浊流定义的过分使用,到今天对鲍玛序列作为浊积岩相序及相关的扇模式普遍持否定态度,深水沉积研究经历了一个认识的旋回。主要问题和争论的焦点是:是否所有深水砂岩都是浊流成因,鲍玛序列能否代表浊积岩相序;是否所有的深水扇水道下方都能形成席状的、平行的、加厚的、具有丘状外形的浊积砂岩沉积;是否可以利用地震方法识别深水扇的砂岩储层。对“浊流”概念的过分使用把深水扇模式内几乎所有深水沉积都解释成浊流成因,导致了曾经为之建立模式的学者纷纷撰文抛弃原有扇模式。深水沉积研究面临着对过往认识的否定和如何建立新的理论模式。尽管浊流及相关的深水扇模式研究走向穷途末路,石油工业却从浊流理论和相关模式中获得了许多油气发现,勘探家们仍然希望通过这些模式寻找更多的油气,科学理论和应用出现了分化。对深水沉积过程和流态的认识及沉积模式的建立是当今深水沉积研究的难点,实现深水砂岩储层的有效预测是深水沉积研究的主要目的。我国深海油气勘探在即,深水沉积的科学问题同样不可逾越。
The study and controversy on deep-water deposition have undergone for 50 years. From turbidity currents and Bouma sequence,to the definition of “turbidite” excessively used in the study, and then the denial of Bouma sequence as the turbidite facies sequence and related fan depositional mode, the study on deep-water deposition has undergone circle on cognition. Main problems and controversy focus on those questions such as, Are all deep-water sandstone due to turbidity currents？ Can Bouma sequence represent turbidite facies sequence？ Were sheet - paral- lel continuous mounded turbidite sandstone deposits developed at the downdip direction of deep-water fan channels？ Can deep-water fan sandstone be recognized using seismic data？ The term “turbidite” excessively used made deep- water deposition is commonly regarded as origin of turbidity currents in deep-water fan modes, which results in many depositional geologist abandon old fan models they devoted . At present, deep-water deposition study faces to deny old cognition and establish new concept models.
Petroleum industry made plenty of hydrocarbon discoveries using turbidity currents concept and related modelsin spite of it face great challenge now, and explorationist want to make more discoveries based on these concept.Therefore, science concept study cannot match with its application.
Recognizing deep-water clastic deposit process.rheology and establishing depositional models are still the critical difficult point that main target is available predication of deepwater sandstone reservoir. At the same time, thescientific problems of deepwater deposittion cannot avoid in our countryTs deepwater hydrocarbon exploration.
出处
《地质论评》
CAS
CSCD
北大核心
2007年第1期36-43,共8页
Geological Review
基金
国家自然科学基金资助项目(编号40238060
40276019)的成果
关键词
深水沉积研究
浊流
鲍马序列
砂质碎屑流
深水扇模式
Deep-water deposition study
Turbidity Current
Bouma Sequence
Sandy debris flows
Deep-waterfan mode
