沧东凹陷孔二段常规油与致密油关系研究  

Relationship between conventional oil and tight oil in the second member of Kongdian formation,Cangdong sag

作　　者：徐祖新[1] 张义杰[1] 王居峰[1] 姜文亚[2] 刘海涛[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大港油田勘探开发研究院,天津300280

出　　处：《中国矿业大学学报》2016年第2期328-335,共8页Journal of China University of Mining & Technology

基　　金：国家科技重大专项(2011ZX05006-005)

摘　　要：为了分析沧东凹陷孔二段常规油与致密油的关系,采用地球化学分析、盆地模拟、铸体薄片和包裹体分析等方法,研究了两者在形成时间、空间分布和资源量3方面的关系,提出了2种常规油与致密油的空间分布模式.研究结果表明：1）孔二段常规油具有2期成藏,致密油仅有1期成藏,致密油形成时间晚于常规油形成时间;2）孔二段常规油与致密油空间分布具有＂正常型＂和＂反转型＂2种模式,从湖盆中心向斜坡高部位,前者依次聚集致密油—常规油,后者依次聚集常规油—致密油—常规油;3）孔二段常规油资源量大于致密油资源量,两者资源量分别为6.36×10^8 t和5.10×10^8 t,但是非常规油（致密油和页岩油）资源量大于常规油资源量,常规油与非常规油资源量比例为1∶1.8～1∶3.0,非常规油是下一步的开发领域.The relationships between conventional oil and tight oil of Ek2 in Cangdong sag,which includes formation age,spatial distribution and quantity of resources,were studied by adopting geochemical analysis,basin modeling,casting thin and inclusion analysis.Two spatial distribution patterns related to conventional oil and tight oil were proposed.The results show that conventional oil experienced two stages of oil accumulation while tight oil had only one,and the forming time of tight oil reservoir was later than that of conventional oil.Two spatial distribution modes of the two types of oil reservoir namely normal type and anti-transformation type were identified;from the basin center to the higher slope,the normal distribution accumulated tight oil and conventional oil in turn while the anti-transformation gathered conventional oil,tight oil and conventional oil in sequence.Resource amount of conventional oil and tight oil are 6.36×10^8 t and 5.10×10^8 t respectively.Although the quantity of conventional oil is greater than that of tight oil,it is less than that of unconventional oil（shale oil and tight oil）.The ratio of conventional oil quantity to unconventional oil quantity varies from 1∶1.8to 1∶3.0.It is concluded that unconventional oil will be a superseding field for oil exploration in the future.

关 键 词：沧东凹陷 孔二段 常规油 致密油 空间分布 

分 类 号：TE122.31[石油与天然气工程—油气勘探]