摘要
敖包塔油田西翼葡萄花油层资源潜力丰富,但油水分布复杂、成藏模式认识不清楚严重制约储量的有效动用.结合地震解释、测井、试油等资料,在构造特征及断裂系统划分、砂体类型及规模研究基础上,分析油水分布特点及控制因素,总结油气成藏条件及模式,根据断裂与砂体组合关系划分有利成藏模式.结果表明:受局部断块、岩性双重控制,全区无统一油水界面,平面"低油高水"、垂向"上水下油"现象频繁;葡萄花油层属于"下生上储、断层沟通、断层—岩性遮挡"成藏模式,油气来自下覆青一段源岩,反转期活动断裂为主要油源断裂;根据该区断裂、砂体组合特点,可细分出"下倾油源断裂沟通—上倾岩性尖灭"、"上倾反向断裂遮挡—侧向岩性尖灭"和"局部正向构造—高断块控藏"3类有利成藏模式.
The west wing blank area of Aobaota oilfield has a rich oil resource potential,in which it is not effective to explore the reserves because of complex oil-water distribution and unclear hydrocarbon accumulation model.Combining with the seismic interpretation,logging and testing,based on the research of tectonic characteristics,fault division,and sand body type and size,analyzing the distribution characteristics and controlling factors of oil-water,analyzing hydrocarbon accumulation conditions and model,the favorable hydrocarbon accumulation pattern was summarized with the combination of the fault and sand body.In the controlling of both structure and lithology,there is not a unified oil-water interface in Putaohua reservoir,the phenomenon of"water high-oil low"in the plane and vertical"water upper-oil lower"was mainly distributed.The Putaohua reservoir was of assemblage type of"upper reservoirs and lower source rocks,oil vertical migration along the faults,and oil accumulation in fault-screened and sandstone wedge out traps":the oil of Putaohua reservoir mainly comes from the local hydrocarbon source rock of K1qn1,faults active in inversion period are the main oil-migrating faults.Based on the spatial combination between fault and sand body,three kinds of favorable oil accumulation models fit to this area.They are the model of oil-migrating fault in the downward direction and sandstone wedge out trap in the upward direction,the model of inversed fault screened in the upward direction and sandstone lap out in both sides,the model of oil accumulation in higher fault blocks and positive structure.
出处
《东北石油大学学报》
CAS
北大核心
2013年第5期42-48,129,共8页
Journal of Northeast Petroleum University
基金
国家自然科学基金(40972101)
中央高校基本科研业务费专项基金(2472013CX02103A)
关键词
复杂油水分布
成藏控制因素
有利成藏模式
葡萄花油层
敖包塔油田西翼
complex oil/water distribution
oil accumulation controlling factors
favorable oil accumulation model
Putaohua oil layers
west wing of Aobaota oilfield
