摘要
为了研究三肇凹陷扶杨油层油成藏规律,采用油分布与源岩、断裂空间叠合研究的方法,对扶杨油层油侧向运移模式及其对油成藏与分布的控制作用进行了研究。结果表明,上覆青一段源岩生成的油向下伏扶杨油层侧向运移的模式为:断裂错断使上覆青一段源岩与下伏扶杨油层中的不同油层组对接,青一段源岩生成的油在浮力作用下侧向运移进入扶杨油层的不同油层组中;断裂错断阶数越多,青一段源岩生成的油侧向运移进入扶杨油层中油层组的层位越深,反之则越浅。青一段源岩生成的油向扶杨油层侧向运移对其油成藏与分布的控制作用主要表现在2个方面:①断裂密集带两侧的地垒构造是扶杨油层油成藏的有利部位;②扶一油层组是青一段源岩生成的油向扶杨油层侧向运移的主要层位。这一研究成果对于指导三肇凹陷扶杨油层石油勘探具有推广价值。
In order to sludy the oil accumulalion rule of Fuyu and Yangdachengzi oil laver in Sanzhao Depression. the method of studying spave distribulion relation among oil distribution, source rocks and faults was applied to study the oil lateral migration model and its control action on oil accumulalion and distrihution. The result shrews that the lateral migration model is that oil generated from the overying K1qn1 source rocks migrates into underlying different horizons of Fuyu and Yangdachengzi oil layer under the action of buoyancy, because faults make the overlying K1qn1 source rocks touch with underlying different horizons of Fuyu and Yangdacheugzi oil layer. The more the fault step in fauh is. the more horizons of Fuyu and Yangdachengzi oil layer the oil migrated into. This lateral migration model of oil generated from the overlying K1qn1 source rocks controls tire oil accumulatiou and distrihution of Fuyu and Yangdachengzi oil laver, and it mainly displays in the following two aspeets:①The horst struetures in two sides of fault condensed behs are favorahle places for oil of Fuyu and Yangdaehengzi oil layer to accumulate. ②Fu I oil group is the main horizon for oil generated from the overlying K1qn1 source rocks to migrate and accumulate in Fuyu and Yangdaehengzi oil layer. The study resuh is of extend value for guiding oil exploration of Fuyu and Yangdachengzi oil layer in Sanzhao Depression.
出处
《岩性油气藏》
CSCD
2012年第3期11-14,60,共5页
Lithologic Reservoirs
基金
国家油气重大专项课题"大气田形成条件
成藏机制与富集规律研究"(编号:2011ZX05007)资助
关键词
凹陷区
上生下储
侧向运移模式
断裂密集带
扶杨油层
三肇凹陷
松辽盆地
depressed area
upper source rock and lower reservoir
lateral migration model: fault condensed belts
Fuyu and Yangdachengzi oil laver
Sanzhao Depression
Songliao Basin