阮伟, Ronald J Steel, 黄洁. 碎屑岩深水扇研究[J]. 海洋地质与第四纪地质, 2010, 30(1): 39-46. DOI: 10.3724/SP.J.1140.2010.01039
引用本文: 阮伟, Ronald J Steel, 黄洁. 碎屑岩深水扇研究[J]. 海洋地质与第四纪地质, 2010, 30(1): 39-46. DOI: 10.3724/SP.J.1140.2010.01039
RUAN Wei, Ronald J Steel, HUANG Jie. THE NEW ADVANCES IN CLASTIC DEEP-WATER FAN[J]. Marine Geology & Quaternary Geology, 2010, 30(1): 39-46. DOI: 10.3724/SP.J.1140.2010.01039
Citation: RUAN Wei, Ronald J Steel, HUANG Jie. THE NEW ADVANCES IN CLASTIC DEEP-WATER FAN[J]. Marine Geology & Quaternary Geology, 2010, 30(1): 39-46. DOI: 10.3724/SP.J.1140.2010.01039

碎屑岩深水扇研究

THE NEW ADVANCES IN CLASTIC DEEP-WATER FAN

  • 摘要: 由于认识到深水储层中富存烃类,碎屑岩深水扇引起了地质学家的兴趣。近年来,碎屑岩深水扇的研究取得了相当大的新进展,回顾和总结近年来该领域取得的进步和提出的新观点,总的来说,这些新的观点包括:碎屑岩深水扇不仅在低位体系域时产生,在沉积供给充足的高位体系域时也能够出现,但有时即使低位体系域时也不能形成深水扇;碎屑岩深水扇通常为浊流成因,但也有一些为碎屑流引起,其内部向上变粗或变厚的反韵律不明显。基于这些新观点,一些新的深水扇模式被提出,这些新的碎屑岩深水扇的模式对其形成和性质的因素,如海平面变化、构造、沉积速率、深水扇类型和性质等,考虑更加全面。结合这些新的认识,提出的深水扇模式包括:富砾、富砂、泥砂混合和富泥型模式,而每种又根据物源的性质分为点物源,线物源和多物源、这些模式考虑因素更加全面、精确,更能反映深水扇的实质,它是深水烃类勘探预测砂体分布有效的工具。

     

    Abstract: Hydrocarbon reservoirs found in deep-water sandstone facies have now aroused geologists' interest in studying details of clastic deep-water fans. The research of deep-water fan has made great progress in recent years. The aim of this paper is to review and sum up a series of new advances and ideas in this field in the recent years. In general, it involves the following key points:deep-water fans can not only be formed in lowstand system tracts, but also in highstand system tracts where sediment supply is great. In some cases, submarine fans cannot be found in lowstand system tracts. Deep-water fans are mostly built by turbidite deposits, but sometimes debris flows can also generate fans. Strata successions of deep-water fans are not simply characterized by either upward-thickening or upward-coarsening cycles. Some new models have been proposed based on these views. More factors such as eustasy, basin tectonics, sedimentation rate, and type of submarine fan are considered. The models are divided into gravel-rich, sand-rich, mixed sand-mud and mud-rich categories and each one includes three types in terms of sediment sources:point sourced, line sourced and multi-sourced. These models are more comprehensive and more accurately reflect characters of deep-water fans. They are also an effective tool to predict sandbody distribution in hydrocarbon exploration.

     

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