PETROLEUM EXPLORATION DOMAINS OF CONTINENTAL NONSTRUCTURAL TRAPS IN CHINA
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摘要: 中国主要陆相产油区的勘探已逐步进入了以非构造圈闭油气藏为主的勘探阶段.按照盆地形成的主控因素和总体构造面貌,依次总结了断陷盆地、坳陷盆地和前陆盆地非构造圈闭的发育与分布特点,初步认为以下6个领域值得在勘探过程中加以重视:a)沉积频繁相变区;b)凹陷中的卸载区;c)陡坡坡折带与缓坡挠褶带;d)古隆起围斜、倾没端及上覆地层;e)断块低部位与下降盘;f)复向斜区.鄂尔多斯及东部陆上的松辽、渤海湾、苏北、南阳等盆地已进入以非构造圈闭为主的勘探阶段.而中西部其他盆地及海域盆地针对非构造圈闭的勘探才刚刚开始,存在大量潜在勘探领域.Abstract: Exploration activity in main continental oil-producing area in China has entered a stage focusing on exploration of nonstructural traps.The development and distribution of nonstructural traps in fault basin,depressional basin and foreland basin were summarized in accordance with the main controlling factors of basin formation and its total structural pattern.The following 6 domains must be paid more attention to:a) area with repeated depositional facies change;b) unloading area of depression;c) break in steep slope and flexural fold in gentle slope;d) pericline,pitching end and overlying stratigraphy of paleo-uplift;e) lower part and footwall of fault block;and f) synclinorium.Exploration in Ordos,Songliao,Bohaiwan,north Jiangsu and Nanyang basins are dominated by nonstructural traps.However,exploration of nonstructural traps in basins in central and west China and offshore area has just been started and many potential domains for petroleum exploration are remained.
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Key words:
- continental facies /
- nonstructural trap /
- petroleum exploration domain /
- China
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