渤海海域辽西凹陷陡坡带LX构造特稠油藏内部油品品质分布及成因

发布时间：2018-03-20 09:53

本文选题：岩石热解　切入点：地震属性　出处：《石油与天然气地质》2017年01期 　论文类型：期刊论文

【摘要】：正确认识特稠油藏内部油品品质分布及成因在油藏的勘探评价和开发设计阶段都具有非常重要的意义。基于岩石热解-地震多属性联合的方法建立油品品质判别模型,对渤海海域辽西凹陷陡坡带LX构造新近系明化镇组和馆陶组的块状特稠油藏内部油品品质进行了三维空间刻画,结合流体包裹体资料恢复的古流体活动史和储层物性分析结果,对形成油品品质分布特征的成因进行研究。结果表明:油藏内部油品品质在垂向上明化镇组油层顶部比底部差,馆陶组油层底部比顶部差;平面上在靠近构造高部位相对较差,在断层附近和油藏边界部位油品品质有所变好。整体上油品品质呈现出环带状分布的特征,这种分布特征与原油的"两期成藏和两次稠化"过程关系密切。早期东营组原油经历了成藏第一期和初次稠化过程;晚期东营组经历了初次稠化的油藏遭受破坏在明化镇组和馆陶组再次聚集成藏,并在储层物性越好的层段,由于进一步发生了更强的稠化作用,原油的油品品质也越差。在成藏第二期内,新生成的油品品质较好的原油沿断层和油藏边界充注,导致这些部位的油品品质相对变好,并最终形成现今油品品质空间分布特征。
[Abstract]:It is very important to correctly understand the distribution and origin of oil quality in the reservoir. Based on the method of rock pyrolysis-seismic multi-attribute combination, the oil quality discrimination model is established. In this paper, the internal oil quality of massive and extra heavy oil reservoirs in the LX structural Neogene Minghuazhen formation and Guantao formation in the steep slope zone of western Liaoning sag in Bohai Sea are characterized in three dimensions. The paleofluid activity history and reservoir physical properties are analyzed in combination with the recovery of fluid inclusion data. The cause of formation of oil product quality distribution is studied. The results show that the oil quality inside the reservoir is worse at the top than at the bottom of the Minghuazhen formation, and the bottom of the Guantao formation is worse than the top, and on the plane, it is relatively poor near the high position of the structure. The quality of oil products has improved in the vicinity of faults and at the boundary of reservoirs. The overall quality of oil products shows the characteristics of annular distribution. This distribution is closely related to the "two-stage accumulation and twice thickening" process of crude oil. The crude oil of the early Dongying formation experienced the first stage and the initial thickening process. In the late Dongying formation, the first thickening reservoir was destroyed and the reservoir was accumulated again in Minghuazhen and Guantao formation, and the better the reservoir physical property was, the stronger thickening action occurred because of the further thickening. The oil quality of crude oil is also worse. In the second stage of reservoir formation, the newly generated crude oil with better quality is filled along the fault and reservoir boundary, which leads to the relative improvement of the oil quality in these parts, and finally forms the spatial distribution characteristics of the oil product quality.
【作者单位】：中海石油(中国)有限公司天津分公司;
【基金】：国家科技重大专项(2011ZX05023-006)
【分类号】：P618.13

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