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  

Controlling effect of structure palaeogeomorphology for sand bodies of Wuerxun—Beier Sag in Hailaer Basin

作　　者：李占东[1] 鲍楚慧 王殿举 张海翔[1] 

机构地区：[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

出　　处：《中南大学学报（自然科学版）》2016年第7期2357-2365,共9页Journal of Central South University:Science and Technology

基　　金：教育部重点实验室开发性课题(NEPU-EOR-2014-010);东北石油大学校培育基金资助项目(XN2014127)~~

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。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 palacogeomorphology 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.

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 

分 类 号：P121.3[天文地球—天体测量]