张吉光
ZHANG Jiguang

• 1:大庆油田有限责任公司勘探事业部

摘要(Abstract)：

延吉盆地在早期受到近南北向伸展断裂的控制,形成了东断、西超的箕式断陷组合;晚期受近东西向的挤压褶皱构造控制,形成南、北2个背斜夹1个宽平向斜的结构。盆地改造前烃源岩已经成熟,但生烃门限的差距较大。大砬子组末期、龙井期为主要成藏期,龙井组末期为聚集成藏的关键时刻。盆地中部地层发育较全,剥蚀地层少,保存条件好,可形成稀油油藏。其中,大马、清茶馆、德新等次凹中形成的构造带是有利勘探区带。盆地南北两端背斜剥蚀厚度超过700 m,保存条件差。靠近烃源区一侧可以形成稠油油藏并上覆次生气藏。
Yanji Basin was controlled by the extension faults with nearly SN strike and the combination of the east faults and west onlap was formed in the early period;at the late stage,the basin was dominated by the compressive folds with nearly EW strike and the structure with two south-north anticlines and a wide flat syncline was generated.Before the reform,the hydrocarbon source rock had been matured,but the hydrocarbon-generating threshold was rather differential.The end of Dalazi Formation and Longjing Formation are the main reservoir-accumulating stages,the late period of the later is the critical moment for the reservoir to enrich and accumulate.The central basin is characterized by well-developed,pretty complete and less-stripped formations and moreover the much better preserving conditions,so the light oil reservoirs are accumulated.Among them,the structural belts formed in the following subsags such as Dama,Qingchaguan,Dexin and so on.The stripped thicknesses are more than 700m in the northern and southern ends of the anticline,and furthermore the preserving conditions are very poor.The side close to the hydrocarbon source region can developed into a heavy oil reservoir with upper secondary gas reservoir.

关键词(KeyWords)： 延吉盆地;伸展断裂;挤压褶皱;残留箕式断陷;油气勘探前景
Yanji Basin;extension/extended fault;compressive fold;residual half-graben depression;petroleum exploration prospect

Abstract:

Keywords:

基金项目(Foundation): 全国油气资源战略选区调查与评价国家专项(2009GXYQ12-05)

作者(Author): 张吉光
ZHANG Jiguang

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