大庆长垣扶余油层油气成藏条件及主控因素研究

Study on hydrocarbon reservoir forming conditions and main controlling factors of Fuyu oil layer in Daqing placanticline

大庆长垣扶余油层具有较大的资源潜力,是下步增储上产的重点地区之一,针对该研究区,运用各类地质、地球化学、试油、钻井、录井及分析测试数据,结合沉积学研究与数值模拟技术分析大庆长垣扶余油层的油气成藏条件与主控因素。研究后认为,该区扶余油层的油源条件、沉积与储层条件、运移条件均较好,是成藏的主要条件,为油气的形成与富集提供了前提条件;大庆长垣扶余油层的油藏类型以复合油气藏为主,岩性与断层油气藏次之,背斜油气藏较少,复合油气藏主要发育于大庆长垣中央隆起的两翼,岩性和断层油气藏全区都有分布,背斜油气藏主要发育于大庆长垣中央隆起顶部附近;生油凹陷、储层岩性、断层是该区扶余油层成藏的主控因素;油气的成藏模式有单向供油侧向运聚模式、双向供油侧向运聚模式与上生下储垂向运聚模式3种。

Fuyu oil layer of Daqing Changyuan has a large potential resource, it is one of major areas for the next step to increase reserves and production, so it needs further research. By application of various kinds of data from geology, geochemistry, testing, drilling, logging and analysis of test data, sedimentology study and numerical simulation technology were also combined. It analyzes pool-formating conditions and and main controlling factors of Fuyu oil layer in Daqing Changyuan. After studying, it is believed that oil sources in this area conditions, deposition and reservoir conditions, migration conditions are good, they are the main reservoi- ring conditions which has provided preconditions for the formation and accumulation of oil and gas; reservoir characteristics indicate that Daqing Changyuan Fuyu oil layer reservoir type are mainly composite reservoirs , lithology reservoir and fault reservoir followed, anticline reservoir less. Composite reservoirs are mainly developed in the two wings of the central uplift Daqing Changyuan, Lithologic reservoirs and faults are distributed in all the region. Anticline reservoirs are mainly developed in Daqing Changyuan near the top of the central uplift; petroleum generative depression, reservoir lithology, faults are the main factor accumulation of Fuyu oil layer in this area. Hydrocarbon accumulation model has unidirectional lateral oil migration and accumulation mode, bilateral oil migration and accumulation mode and unboiled oil topside reservoir underneath Vertical migration patterns.