大庆长垣以东地区扶余油层油气运移与富集  

Hydrocarbon migration and enrichment features of the Fuyu oil layer to the east of the Daqing placanticline

作　　者：孙同文[1] 吕延防[1] 刘宗堡[1] 付晓飞[1] 付广[1] 

机构地区：[1]东北石油大学油气藏形成机理与资源评价黑龙江省重点实验室

出　　处：《石油勘探与开发》2011年第6期700-707,共8页Petroleum Exploration and Development

基　　金：国家大型油气田及煤层气开发科技重大专项"中国大型气田形成条件;富集规律及目标评价"(2008ZX05007);高等学校博士学科点专项科研基金项目(2006220002)

摘　　要：为了系统查明大庆长垣以东地区扶余油层油气运聚过程和富集特征,详细研究其油气运移条件,并通过油田开发动态数据验证,总结油气富集的主要特征。大庆长垣以东地区具有垂向-侧向双重油气运移方式,垂向运移主要发生在上覆烃源岩垂向排烃范围内,油气在超压作用下,沿开启的T2油源断层"倒灌"进入下伏扶余油层;侧向运移主要有3种类型:源内沿砂体向油源断层上升盘短距离侧向运移;近源沿构造轴向向继承性局部隆起带短距离侧向运移;远源沿砂体沟通的Ⅱ类断裂密集带向朝阳沟阶地长距离侧向运移。油源断层发育部位和烃源岩垂向排烃范围附近、构造轴向与断层走向近一致的鼻状构造为富油区带;因特征不同,断裂密集带在三肇凹陷不是主要富油部位,而在朝阳沟阶地为有利储油构造。To clarify the hydrocarbon migration,accumulation and enrichment features of the Fuyu oil layer to the east of the Daqing placanticline,the hydrocarbon migration conditions of the Fuyu oil layer are studied in details using the performance data of oil fields.In the area to the east of the Daqing placanticline,dual modes of vertical–lateral migration are available.Vertical migration mainly happens where vertical hydrocarbon expulsion takes place in upper source rocks.Hydrocarbon is poured into the underlying Fuyu oil layer along the open T2 source fault under overpressure.Lateral migration has three types： hydrocarbon within source rocks migrates laterally in short distance into the uplifted wall of source faults along sands;hydrocarbon near source rocks migrates laterally into successive local uplifts along tectonic axis in short distance;hydrocarbon far from source rocks migrates laterally in long distance into the Chaoyanggou Terrace along Type II fault concentration belts connected by sands.Oil-rich zones are places where source faults are developed and nose-structures around vertical hydrocarbon expulsion of source rocks whose tectonic axis is nearly the same with the trend of faults.Because of the different features,the fault concentration belt in the Sanzhao sag is not oil-enriched,but the Chaoyanggou Terrace is the favorable oil-accumulation structure.

关 键 词：扶余油层 油气运移 油气富集特征 断裂密集带 大庆长垣以东地区 

分 类 号：TE122.1[石油与天然气工程—油气勘探]