摘要
贝中次凹位于海拉尔盆地贝尔凹陷南部，主要含油层为南屯组，其次为布达特群和铜钵庙组，是一个复式油气聚集带。构造上东西向受边界断裂控制形成不对称双断式结构，有利相带为浅湖一半深湖背景下的扇三角洲前缘及辫状三角洲前缘沉积。由于不同构造部位、不同时期受构造和储层控制程度不同，因此可以形成不同的油藏类型。贝中次凹油藏主要受构造和沉积相带双重控制，具有分带性，分析认为油藏类型主要有3种：西部构造带的岩性-构造层状油藏；中部低凸起构造带为复式油气聚集带，主要为南屯组的岩性-构造层状油藏、构造～岩性油藏和布达特群潜山构造油藏；东部构造带主要为构造-岩性油藏和岩性油藏。
Beizhong sub-sag is located in the south part of Beier Sag in Hailaer Basin. The major oil-bearing formation is Nantun Formation, Budate Group and Tongbomiao Formation. It is a multiple hydrocarbon accumulation zone. There is an asymmetric two-fault structure formed under the control of boundary fracture in the direction from east to west. Favorable facies is fan or braided delta front in background of shallow-half-deep lake. Different types of reservoir are formed because of different structural location, different controlling degree of structure and reservoir in different ages. Beizhong sub-sag is mainly controlled by both structure and sedimentary facies and shows zoning distribution. There are 3 types of reservoirs ： lithology-structure bedded reservoir in the west structural zone ; multi- ple hydrocarbon accumulation zone in the middle low salient, including lithology-structure bedded reservoir in Nantun Formation, structure-lithology reservoir and buried hill reservoir in Budate Group; structure-lithology reservoir and lithology reservoir in the east structural zone.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第6期39-43,共5页
Petroleum Geology & Oilfield Development in Daqing
关键词
贝中次凹
构造带
沉积相带
岩性-构造层状油藏
构造-岩性油藏
地层-岩性油藏
潜山
构造油藏
Beizhong sub-sag
structural zone
sedimenta
facies
lithology-structure bedded reservoir
struc- ture-lithology reservoir
formation-lithology reservoir
buried hill reservoir
