珠江口盆地琼海凸起断裂调整聚集成藏模式  

Late Fault Adjustment and Late Accumulation Pool-forming Model in Qionghai Uplift,Pearl River Mouth Basin

作　　者：张迎朝 朱伟林[2] 高阳东[2] 

机构地区：[1]中海石油(中国)有限公司湛江分公司,广东湛江524057 [2]中国海洋石油总公司,北京东城100010

出　　处：《西南石油大学学报（自然科学版）》2015年第5期55-63,共9页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05023-01-07)

摘　　要：针对油气分布规律认识问题,运用油气地球化学、构造解析方法,开展了中新世构造运动背景下珠江口盆地琼海凸起中新统珠江组油藏的调整、次生油藏形成机制的研究。以地层界面T_(41)(珠江组一段Ⅳ油组顶)为界的珠江组上、下部油藏,分别具有"晚期聚集"和"晚期断裂调整"特征,下部油藏原油密度高、黏度大;上部油藏原油密度低、黏度小。珠江组上、下部油藏油气来源相同。中中新世的NWW—SEE走向雁列式断裂体系沟通了珠江组上、下部油藏,起到了调整改造下部油藏和向上部运移油气的双重作用。提出了"晚期断裂调整、晚期聚集"油气成藏模式,即由于晚期断裂的垂向沟通,早期形成的珠江组下部油藏中局部油气沿断裂向上部运聚,调整后的下部油藏、晚期聚集的上部油藏垂向叠置,形成"下重上轻"、多油水系统的油田,对研究区油气勘探开发具有重要指导意义。To figure out hydrocarbon distribution pattern,the adjustment of hydrocarbon reservoirs of Miocene Zhujiang formation under Miocene tectonic background and secondary pool-forming pattern were analyzed in Qionghai uplift,Pearl River Mouth basin of South China Sea.The upper pools and lower pools which were divided by T41 subsurface boundary were characterized by late accumulation and late fault adjustment respectively.The lower pools with great reservoir storage property had relatively heavy and high viscosity oil.The upper pools had light and low viscosity oil.Hydrocarbon of both upper pools and lower pools had derived from same source rock.Mid-Miocene NWW- SEE trend echelon fault system had adjusted lower pools and migrated hydrocarbon upwards to form upper pools.The hydrocarbon pool-forming model with characteristics of late fault adjustment and late accumulation was proposed reasonedly,that is,part hydrocarbon from lower pools of Zhujiang Formation had migrated upwards along late fault system and accumulated in the upper reservoirs.The lower pools after adjustment and upper pools superimposed vertically,form relatively heavy lower pools and light upper pools.

关 键 词：“晚期断裂调整、晚期聚集”油藏 成藏模式 中新统珠江组 琼海凸起 珠江口盆地 

分 类 号：TE121[石油与天然气工程—油气勘探]