天然气地质学

银根-额济纳裂谷盆地群凹陷结构样式及对成藏的控制

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  • 1.中国地质大学,北京 100083; 2.中国石油勘探开发研究院西北分院,甘肃 兰州  730020;3.中国科学院海洋研究所,山东 青岛 266071
陈启林(1963-),男,甘肃定西人,高级工程师,在读博士研究生,主要从事层序地层学、油气地质综合认研究和勘探目标评价工作.

收稿日期: 2005-04-06

  修回日期: 2005-07-07

  网络出版日期: 2005-10-20

基金资助

中国石油天然气集团公司“九五”攻关项目“银根-额济纳旗盆地油气地质特征综合评价”(编号:980208-34-03);中国石油天然气股份公司“石油重大勘探领域预探与目标评价”项目子课题“中西部地区中小盆地石油预探区带与目标评价”(编号:010107-10-6)资助.

DEPRESSION STRUCTURE-STYLE TYPES AND PETROLEUM ACCUMULATION,RIFT BASINS GROUP OF YINGEN-EJINA

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  • 1.China University of Geosciences (Beijing), Beijing  100083, China; 2. Northwest Branch, Research Institute ofPetroleum Exploration and Development, PetroChina, Lanzhou 730020, China; 3. Research Institute ofOceanics, Chinese Academy of Sciences, Qingdao 266071, China

Received date: 2005-04-06

  Revised date: 2005-07-07

  Online published: 2005-10-20

摘要

通过对银根-额济纳裂谷盆地群各类典型凹陷结构样式的研究,指出研究区发育单断型和双断型凹陷,单断型可进一步划分为单断断阶式、单断断槽式和单断断超式,双断型主要为双断地堑式。通过对白垩系和中下侏罗统2套构造层关系的研究,指出单断型凹陷可划分为单断叠置型和单断迁移型2种。认为不同结构样式凹陷烃源岩的展布和保存条件不同,烃源岩的发育主要受沉积中心的次级“洼槽”控制;继承性发育的凹陷烃源岩条件最好,可与缓坡带多级断阶带的局部构造圈闭、缓坡带的超覆砂体形成良好配置;迁移型凹陷的烃源岩常遭受一定程度的剥蚀,中下侏罗统烃源岩与地层不整合圈闭可形成较好配置;单断型凹陷缓坡超覆带是形成地层油气藏的最有利带,缓坡多级断阶带是构造油气藏的最有利带。

本文引用格式

陈启林;杨占龙;关银录;卫平生; . 银根-额济纳裂谷盆地群凹陷结构样式及对成藏的控制[J]. 天然气地球科学, 2005 , 16(5) : 559 -563 . DOI: 10.11764/j.issn.1672-1926.2005.05.559

Abstract

Studies of depression structure-styles show there are variant typical depressions in Yingen-ejina rift group basins, which are single-fault depression and double-fault depression. The single-fault depressions may classify in detail asthe following: single fault bench type; single fault trough type and single fault overlap type etc. The double-fault depression mainly be double fault graben type. According the relationship of Jurassic and Cretaceous structural layers, these depressions may be classified into two types: single fault overriding depression and single fault migration depression. Hydrocarbon source rocks in different structure-style type of depressions have variant states of distribution and conservation. Distribution of source rock is mainly controlled by sub-trough of  each depocenter. Source rock in succeed depression is in good condition and well   disposed with local structural traps in stage faults zone and overlap sandstone bodies of plain slope. The source rock in migration depression is eroded in some degree, but the source rock of middle-lower Jurassic is well deposed with the stratigraphic non- conformity traps. So, the overlap zone in plain slope of single-fault depression is prospecting in stratigraphic traps exploration and stage fault bench zone in plain slope is favorable in structural traps.

 

参考文献

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