| 新疆南天山山前地区中生界成藏条件及勘探潜力 |
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| 引用本文： | 周新源,王清华,肖中尧.新疆南天山山前地区中生界成藏条件及勘探潜力[J].地质科学,2004,39(4):463-474. |
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| 作者姓名： | 周新源 王清华 肖中尧 |
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| 作者单位： | 石油大学资源与信息学院,北京,102249;浙江大学地球科学系,杭州,310027;中国石油天然气股份有限公司塔里木油田分公司,新疆,库尔勒,841000 |
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| 摘 要： | 库车坳陷和喀什凹陷是塔里木盆地南天山山前的东、西两个勘探热点地区,已发现以克拉2气田为代表的多个油气田和含油气构造.两个地区的中生界为河流-湖泊-沼泽相含煤碎屑岩沉积建造,是主要的烃源岩,煤系源岩以生气为主,生气强度大,湖泊相烃源岩以生油为主,油气源充足.喜马拉雅期,在南天山强烈挤压和推覆作用下,山前形成一系列成排成带展布的褶皱-逆冲断层带,并表现为南北分带、东西分段和上下分层的特征,圈闭发育,类型以断层相关褶皱为主.库车坳陷和喀什凹陷发育多套优质的储盖组合,并以古近系巨厚膏泥岩与白垩系砂岩构成储盖组合为主.南天山山前已发现的油气主要来源于三叠-侏罗系湖相、湖沼相烃源岩和石炭系碳酸盐岩,以晚期成藏为主,有利于油气的保存.因此,南天山山前具有形成大-中型油气田的成藏地质条件,勘探潜力巨大,既是塔里木盆地天然气勘探的主战场,也是石油勘探的重要地区.
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| 关 键 词： | 南天山山前 库车坳陷 喀什凹陷 油气源 储盖组合 晚期成藏 大-中型油气田 |
| 文章编号： | 0563-5020(2004)04-0463-12 |
| 收稿时间： | 2004-01-14 |
| 修稿时间： | 2004年1月14日 |
ACCUMULATION CONDITIONS AND POTENTIALS OF THE MESOZOIC IN AREA SOUTH OF THE NAN-TIANSHAN MOUNTAINS, XINJIANG |
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| Zhou Xinyuan,Wang Qinghua,Xiao Zhongyao.ACCUMULATION CONDITIONS AND POTENTIALS OF THE MESOZOIC IN AREA SOUTH OF THE NAN-TIANSHAN MOUNTAINS, XINJIANG[J].Chinese Journal of Geology,2004,39(4):463-474. |
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| Authors: | Zhou Xinyuan Wang Qinghua Xiao Zhongyao |
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| Institution: | 1. Faculty of Natural Resources and Information Technology, University of Petroleum, Beijing 102249;2. Department of Geosciences, Zhejiang University, Hangzhou 310027;3. Tarim Oil Field Branch Company, China National Petroleum Corp., Korla, Xinjiang 841000 |
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| Abstract: | The Kuqa and Kashi Depressions were hot spots for oil-gas exploration in the Tarim Basin, both of them being situated in the area south of the Nan-Tianshan Mountains. A series of oil-gas fields and petroliferous structures, for example, the Kela 2 gas field, were reported in the area. The Mesozoic accumulation conditions and potentials were discussed in the paper. The Mesozoic coal-bearing strata, with fluvial-lacustrine-marshy sedimentary facies, were main source rocks, in which the coal-measures produced gas and lacustrine source rocks produced oil, respectively. The violent compression and nappe structuring in the Himalayan orogeny resulted in a complicated fold-and-thrust system in the area south of the Nan-Tianshan Mountains, which was characterized with zonation in S-N direction, segmentation along W-E striking and structurally layered vertically. In addition to abundant oil-gas sources, the trap well developed in the area, with a majority being fault-related folds. Some excellent reservoir-cover associations were discovered, in which the associations composed of the thick Paleogene gypsum-mudstones and Cretaceous sandstones were mostly important. So far, the discovered oil-gas in the area was sourced mainly from the Juro-Triassic lacustrine-marshy clastic sediments and the Carboniferous carbonate rocks, which was accumulated in later periods, so as to be advantageous for preservation. To sum up, the area south of the Nan-Tianshan Mountains had geological conditions for accumulation of large-mesoscopic fields and good potentials, where was both a key region of gas exploration and an important area for oil prospecting in the Tarim Basin. |
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| Keywords: | Source rocks Reservoir-cover associations Accumulation in later periods Large-mesoscopic oil-gas field South of the Nan-Tianshan Mountains The Kuqa Depression The Kashi Depression |
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