敖古拉断裂对萨、葡、高油层油的侧向运移作用

Actions of Aogula fault on the oil lateral migration in Saertu,Putaohua and Gaotaizi oil reservoirs

为了研究松辽盆地西部敖古拉断裂附近萨、葡、高油层油分布规律,在敖古拉断裂形成演化特征研究的基础上,通过分析敖古拉断裂发育及油势能分布特征,总结敖古拉断裂与其附近萨、葡、高油层油之间关系,研究了敖古拉断裂对萨、葡、高油层油侧向运移的作用。结果表明:敖古拉断裂北部对萨、葡、高油层油侧向运移的侧接作用,使油向西部斜坡区侧向运移,而中部和南部对油侧向运移起阻挡作用,使油在敖古拉断裂附近聚集分布;敖古拉断裂南部对高台子油层油侧向运移不起向上变径作用,油只在高台子油层中聚集分布,而中部和北部对高台子油层油侧向运移起向上变径作用,使油在高台子油层和葡萄花油层中聚集分布;敖古拉断裂对葡萄花油层油侧向运移起向上变径作用,造成萨尔图油层油比葡萄花油层油富集;敖古拉断裂对葡萄花油层和高台子油层油侧向运移起向北变径运移作用,造成葡萄花油层和高台子油层油在敖古拉断裂北部比南部更富集。

In order to study the oil distribution law of Saertu,Putaohua and Gaotaizi oil reservoirs near Aogula fault in the west of Songliao Basin,on the bases of the formation and evolution characteristics of Aogula fault,by means of the analyses of fault development and the distribution characteristics of oil potential energy,the relationship between Aogula fault and its nearby Saertu,Putaohua and Gaotaizi oil reservoirs were summarized,and moreover the actions of the fault on the oil lateral migration in Saertu,Putaohua and Gaotaizi oil reservoirs were studied.The results show that the lateral-connected hydrocarbon migration along North Aogula fault from Saertu,Putaohua and Gaotaizi oil reservoirs makes the oil laterally migrated to the West Slope;while in the middle and southern parts,the fault plays a blocked effect and makes oil accumulated and distributed near Aogula fault;South Aogula fault doesn't play upward migration path-changing action for the oil lateral migration of Gaotaizi oil reservoirs,where the oil only accumulates and distributes in Gaotaizi oil reservoirs;while for Middle and North Aogula fault,the action is on the contrary for the reservoirs,thus the oil is accumulated and distributed in Gaotaizi and Putaohua oil reservoirs;for Putaohua oil reservoirs,Aogula fault plays the same action,which results in more enriched oil accumulation in Saertu reservoirs than in Putaohua oil reservoirs;the lateral oil migration in Putaohua and Gaotaizi oil reservoirs resulted from Aogula fault have played northward migration path-changing action,which causes more enriched accumulation of the oil in North Aogula fault than in South Aogula fault.The study achievements possess important significance for the correct understanding of oil distribution in Saertu,Putaohua and Gaotaizi oil reservoirs near Aogula fault and provide the guidance for the oil exploration in the study area.