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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第7期    总第263期    2016年7月

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文章编号:1672-7207(2016)07-2357-09
海拉尔盆地乌尔逊—贝尔凹陷构造-古地貌对沉积砂体的控制
李占东1,鲍楚慧1,王殿举2,张海翔1

(1. 东北石油大学 石油工程学院,黑龙江 大庆,163318;
2. 北京大学 地球与空间科学学院,北京,100871
)

摘 要: 基于分析盆地构造活动对沉积充填的响应关系可以明确构造对沉积体系发育和展布规律的控制,从而可以预测油气藏分布,为此,通过乌尔逊—贝尔凹陷构造-古地貌对砂体和油气藏控制作用进行研究。结合油气勘探成果,探讨构造-古地貌背景下发育的砂体与油气聚集关系。研究结果表明:构造演化控制沉积演化,不同构造演化阶段发育的沉积砂体类型不同;缓坡、陡坡及它们之间的转换带为主要物源方向,局部隆起为次要物源方向;依据古地貌的形态特征及成因机制,划分陡坡同向断阶型、缓坡同向断阶型、缓坡反向断阶型及洼槽边缘型4种古坡折类型,不同构造带位置、不同类型坡折带所发育的沉积砂体类型迥异;洼槽边缘断裂坡折带是最有利的勘探部位。

 

关键词: 海拉尔盆地;乌尔逊—贝尔凹陷;构造-古地貌;断裂坡折带;油气藏

Controlling effect of structure palaeogeomorphology for sand bodies of Wuerxun—Beier Sag in Hailaer Basin
LI Zhandong1, BAO Chuhui1, WANG Dianju2, ZHANG Haixiang1

1. College of Petroleum Engineering, Northeast Petroleum University, Daqing 163318, China;
2. School of Earth and Space Science, Peking University, Beijing 100871, China

Abstract:Through the analysis of response relationship between tectonic activity and sedimentary filling, the controlling effect of structure for the distribution of sedimentary system can be known, and oil and gas reservoir distribution can be predicted. In this study, structure palaeogeomorphology for the sand body and oil and gas reservoirs of Wuerxun—Beier Sag in Hailaer Basin was researched. Based on the exploration practice, the relationship between the sand bodies which was controlled by structure palaeogeomorphology and accumulation of hydrocarbon was studied. The results show that the sedimentary evolution is controlled by the tectonic evolution, and there are different types of sedimentary systems in different tectonic evolution periods. The main provenance orientations lie in gentle slope, steep slope and transform zone, and the secondary provenance orientation lies in local uplift. According to the morphological feature and contributing factor, there are four kinds of slope break zones, i.e., the same dip fault terrace zone in steep slope, the same dip fault terrace zone in gentle slope, opposite dip fault terrace zone in gentle slope and margin fault terrace zone in sag.There are different types of sand bodies in different locations of structural zone and different kinds of slope break zones. The margin fault terrace zone in sag is the most favorable exploration area.

 

Key words: Hailaer Basin; Wuerxun—Beier sag; structure palaeogeomorphology; fracture slope-break zone; oil and gas reservoirs

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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