厄瓜多尔Oriente盆地南部潮坪相识别
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摘要
A、B油田位于厄瓜多尔Orient盆地南部14、17区块,整个盆地的构造演化及沉积演化已基本清楚,但对于多套储层砂体,尤其是主力层成因单元级别的研究不多,研究深度也远远不够。本文通过岩心及录井资料识别出5个微相,并详细刻画了其岩性、沉积构造特征;通过岩电分析,归纳出潮坪各微相曲线特征;通过3次不同方法优选有效地震属性。从物源方向、沉积韵律、岩石类型、沉积构造、古水流等多个方面总结出潮坪相与潮汐三角洲及河流相的不同。
The oil field of A and B are located in the Oriente Basin of Ecuador. The structural and sedimentary evolution had been clarified. However, the studies on genesis unit level of multiple layers of reservoir were not enough, especially on dominant layers. According to data of drilling core and log, five microfacies were identified, and their lithologic characteristics and sedimentary structure features were described carefully. Combination with lithologic character and electrical property, we summed up curve features of microfacies. Seismic properties were effectively optimised by three methods. The differences between tidal flat, tidal delta and fluvial facies were recognized.
The oil field of A and B are located in the Oriente Basin of Ecuador. The structural and sedimentary evolution had been clarified. However, the studies on genesis unit level of multiple layers of reservoir were not enough, especially on dominant layers. According to data of drilling core and log, five microfacies were identified, and their lithologic characteristics and sedimentary structure features were described carefully. Combination with lithologic character and electrical property, we summed up curve features of microfacies. Seismic properties were effectively optimised by three methods. The differences between tidal flat, tidal delta and fluvial facies were recognized.
引文
[1]李文涛,赵铭江,张波,等.厄瓜多尔Oriente盆地11区块油气勘探潜力分析[J].油气地质与采收率,2004,11(1):33-35.
[2]Shanmugam G,Poffenberger M,Toro A J.Tide-dominated estuarine facies in the Hollin and Napo Formations.Sacha field,Oriente Basin,Ecuador[J].AAPG,2000,84(5):652-654.
[3]姜在兴.沉积学[M].北京:石油工业出版社,2003:341-382.
[4]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001:290.
[2]Shanmugam G,Poffenberger M,Toro A J.Tide-dominated estuarine facies in the Hollin and Napo Formations.Sacha field,Oriente Basin,Ecuador[J].AAPG,2000,84(5):652-654.
[3]姜在兴.沉积学[M].北京:石油工业出版社,2003:341-382.
[4]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001:290.
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