| 前陆盆地层序地层与油气聚集 |
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| 引用本文： | 刘刚,董树文.前陆盆地层序地层与油气聚集[J].地质力学学报,2007,13(1):51-59. |
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| 作者姓名： | 刘刚 董树文 |
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| 作者单位： | 1. 中国地质科学院地质力学研究所,北京,100081
2. 中国地质科学院,北京,100037 |
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| 摘 要： | 从区域构造的观点看,同板块碰撞有关的前陆盆地是油气聚集的有利地区。两个板块的相互碰撞形成一系列的造山带,而在相对稳定板块的前缘常常形成前陆盆地。由于前陆盆地的特点,使它对油气的生成、运移、聚集和保存都十分有利,世界上前陆盆地是油气最富集的一类盆地。前陆盆地层序地层学是将层序地层学理论应用于褶冲带和前陆盆地的一个特例,假定物源供给稳定,前陆盆地可容空间的变化主要受控于构造作用和全球海平面变化。本文通过概括前陆盆地不同级别的地层层序、旋回及其成因,揭示造山带构造运动、盆地沉积作用和海平面变化之间的内在联系,进一步研究前陆盆地的沉积一构造演化,提出前陆盆地的油气潜力主要取决于早期被动边缘发育程度和保存条件,"薄皮"逆掩断层带具一定油气潜力,具有多种类型油气圈闭,以及盆地晚期的前缘沉积有利于早期沉积的埋藏、成熟和保存等四项前陆盆地与油气关系的结论和认识,为油气资源勘探提供理论依据。
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| 关 键 词： | 前陆盆地 层序地层学 油气 可容纳空间 构造 |
| 文章编号： | 1006-6616（2007）01-0051-09 |
| 收稿时间： | 2007-01-25 |
| 修稿时间： | 2007年1月25日 |
SEQUENCE STRATIGRAPHY AND PETROLEUM ACCUMULATION IN FORELAND BASINS |
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| LIU Gang and DONG Shu-wen.SEQUENCE STRATIGRAPHY AND PETROLEUM ACCUMULATION IN FORELAND BASINS[J].Journal of Geomechanics,2007,13(1):51-59. |
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| Authors: | LIU Gang and DONG Shu-wen |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China and Chinese Academy of Geological Sciences, Beijing 100037, China |
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| Abstract: | From a tectonic point of view,foreland basins related to plate collision are areas favorable for petroleum accumulation.Collision of two plates form a series of orogenic belts,while foreland basins tend to form in the fronts of relatively stable plates.The characteristics of foreland basins make them favorable for petroleum generation,migration,accumulation and preservation.Foreland basins are one of the basins endowed with the most abundant petroleum in the world.Sequence stratigraphy of foreland basins is a special branch of applying the theory of sequence stratigraphy to fold belts and foreland basins,assuming that the material supply is stable and that the change in accommodation space of a foreland basin is controlled by structural effects and global sea-level change.Through summarizing stratigraphic sequences and cycles of different orders and their origin,the authors have revealed the inherent relationship of tectonic movement of orogenic belts,basin sedimentation and sea-level change and further studied the sedimentary-tectonic evolution of foreland basins.In addition,they propose that: the petroleum potential of foreland basins mainly depends on the devolopment degree of the early-formed passive margins and preservation conditions of petroleum;thin-skinned overthrust belts have fairly good petroleum potential;foreland basins have many types of traps;and the late-stage front sediments of basins is advantageous to burial,maturation and preservation of early-stage sediments.The four conclusions about the relationships between foreland basins and petroleum provide a theoretical basis for petroleum exploration. |
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| Keywords: | foreland basin sequence stratigraphy petroleum accommodation space structure |
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