摘要:
我国含油、气盆地中,陆相沉积广泛分布。目前原油生产几乎全部是由陆相沉积中产出的,所以陆相沉积模式的研究,是各个油、气勘探地区有关人员十分关心的科研项目之一。1980年中国石油学会和中国地质学会在西安召开了碎屑岩沉积相模式及相标志学术讨论会,初步总结了我国含油区陆相沉积近年来的研究工作,对河流相、三角洲相、湖泊相和浊流沉积都作了讨论。
Abstract:
According to the depositional conditions,the Weso一Cainozoic continental sedi-ments are suggested to be divided into three kinds of environment in 12 facics:(1)Underwater depositional environment including deeplake facies,semi-deep lake facies,shallow lake facies.near-lake facies,salt lake facies and turbiditc facies;(2)transitional depositional environmeat including deltaic facies and marsh facics;(3)Subaerial depositioaal environment including fluviatile facies,pluvial facies,piedmont facies and aeolian facies.A map of depositional pattern for some of the Meso-Cenozoic oil and gas basins in China is、worked out based on the distribution of sedimentary facies of their oil-bearing rock series.The study of the continental depositional patterns of any oil and gas basins is of great significance to their exploration.Oil pools in any basins occur mostly in the oil-generation depressions and their environs,while the deep-lake facies and the semi-deep lake facies are both the region of distribution of source rocks and the center of deposition.so the research work serves as a useful guide to the discover of oil.丁he author believes that climate and tectonic movements are the two factors controlling the distribution and development of sedimentary facies.As for the tectonic movement occurring in the Meso一Cenozoic time,the author tries to classify the basins into three types:compressive, tensile and transitional,and gives a brief description of the distributional characteristics of sedimentary- facies in various types of basin.
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