乌尔逊—贝尔凹陷岩性-地层油藏形成条件及分布规律  

Formation condition and distribution rule of lithologic and stratigraphic reservoirs in Wurxun—Beir Sag

作　　者：吴海波[1] 李军辉[1] 刘赫[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《中南大学学报（自然科学版）》2015年第6期2178-2187,共10页Journal of Central South University:Science and Technology

基　　金：国家973项目(2009CB219306)~~

摘　　要：乌尔逊—贝尔凹陷是海拉尔盆地油气勘探的主区域,其剩余资源潜力较大。根据岩性-地层油藏成藏特征及分布规律,对有利勘探区带进行预测。研究结果表明:乌尔逊—贝尔凹陷发育3套主力烃源岩、6种沉积体系,发育4类储层及多个高孔隙带,经历5期构造运动,形成6次沉积间断,在垂向上形成3套生储盖组合,为岩性-地层油藏的形成提供有利的地质条件。按照圈闭成因及其几何形态,将其发育的岩性-地层油藏划分为岩性油藏、地层油藏和复合油藏3种类型油藏。油气主要沿不整合面及不同级次湖泛面上下分布,平面上围绕生油洼槽分布,不同的构造带上岩性-地层油藏类型特征不同。经钻探新发现3个整装规模储量的岩性-地层油藏,勘探效益显著。Wurxun--Beir Sag is the main area of oil and gas exploration in Hailar Basin and it has a great potential of residual hydrocarbon resources. According to hydrocarbon accumulation characteristic and distributing rule of the lithologic and stratigraphic reservoirs, the favorable exploration direction was predicted by comprehensive analysis method. The results indicate that there are three sets of regional source rocks, six depositional systems, four types reservoirs and many abnormal high porosity zones and develop five structural movements and six depositional breaks and contains three source-reservoir-caprock assemblages. These properties offer the favorable geological condition for forming the lithologic and stratigraphic reservoirs. Based on the origin and geometry of traps, the reservoirs are divided into lithologic reservoir, stratigraphic reservoir and compound reservoir. The oil and gas distribute mainly through unconformity surface and different flooding surfaces, and around the source trough. The characteristics of lithologic and stratigraphic reservoirs in different structural belts are different. Three full-scale lithologic and stratigraphic reservoirs were founded by drilling. The distinct exploration benefits were obtained.

关 键 词：乌尔逊—贝尔凹陷 沉积体系 岩性-地层油藏 形成条件 分布规律 

分 类 号：TE121[石油与天然气工程—油气勘探]