摘要
跃进斜坡区南北分别为扎哈泉凹陷和英雄岭凹陷,是凹陷油气运移有利指向区,油气来源充足。烃源岩综合评价表明,扎哈泉凹陷E23烃源岩厚度大、分布面积广、有机质丰度高、有机质类型较好,目前已到成熟阶段,具有巨大供烃能力。油源对比研究表明,跃东构造原油与跃进一号构造原油特征一致,为北面英雄岭凹陷来源。跃进二号、乌南-绿草滩和昆北油田原油均来自扎哈泉凹陷E23源岩,但原油成熟度不同。跃进二号原油成熟度较低,与乌南-绿草滩原油和昆北油田储层固体沥青基本一致,明显低于昆北油田原油,属于烃源岩低成熟-成熟阶段早期产物,跃进斜坡区尚未发现源岩生烃高峰期产物。跃进斜坡区相对昆北油田更靠近凹陷生烃中心,源岩生烃高峰期产物具有优先充注的特征,斜坡区下倾方向大量发育的岩性圈闭和构造-岩性圈闭具有巨大的勘探潜力。
The Yuejin slope area,which is located in the south of Yingxiongling sag and north of Zhahaquan sag,is the favorable directional zone of hydrocarbon migration,and has ample oil source. The comprehensive evaluation of source rock indicates that E23 source rocks in Zhahaquan sag are characterized by large thickness,widespread distribution,high abundance of organic matter,ideal type of organic matter,which are in mature stage now and has great hydrocarbon supplying ability.The research of oil-source correlation shows that the crude oil of Yuedong structure and Yuej in-1 structure has the same characteristics,their source is both from Yingxiongling sag in the north.The crude oil of Yuejin-2 structure,Wunan-Lucaotan and Kunbei oilfield is all from E23 source rocks in Zhahaquan sag, but the oil maturity is different.The maturity of crude oil from Yuejin-2 is low which is as same as that of crude oil from Wunan-Lucaotan and preserved solid bitumen from Kunbei oilfield, but is lower significantly than that of crude oil from Kunbei oilfield,the crude oil from Yuejin-2 is the early product of source rocks at low mature-mature stage,it has not been found product of source rocks at peak hydrocarbon-generating stage in Yuejin slope area.Yuejin slope area is closer to hydrocarbon generation center of sag than Kunbei oilfield,the product of source rocks at peak hydrocarbon-generating stage is characterized by priority infill inj ection,the lithologic trap and structure-lithologic trap widespreading in downdip direction of slope area have great exploration potential.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2014年第3期730-740,共11页
Journal of Jilin University：Earth Science Edition
基金
国家重大科技专项(2011ZX05001-001)
国家"973"计划项目(2014CB239005)
中国石油股份有限公司重大科技专项(2011E-0301)
关键词
柴达木盆地
跃进斜坡区
扎哈泉凹陷
油源
勘探方向
Qaidam basin
Yuejin slope area
Zhahaquan sag
oil source
exploration direction
