塔河油田石炭系卡拉沙依组勘探有利区带精细评价

发布时间：2019-02-25 18:39

【摘要】：石炭系卡拉沙依组是塔河油田碎屑岩领域最具潜力的层系之一,但埋藏深,砂体规模小,油气成藏主控因素不明,亟需开展区带精细评价。通过分析石炭系卡拉沙依组油气分布特征、断裂体系、砂体以及下伏地层等成藏控制因素,采用"多图叠合"方法,叠合油气藏分布及油气显示图、断裂分布图、沉积相图、地层展布图,形成卡拉沙依组综合评价图,平面上将研究区划分为3个区带,并指明下步勘探的圈闭类型。其中,最有利区以寻找水下分流河道、"片状"分布的水下决口扇、河口坝等岩性圈闭为主;有利区以寻找被潮汐改造的"条带状"分布的水下分流河道、河口坝及席状砂岩性圈闭为主;潜力区以寻找"片状"分布的砂坪岩性圈闭为主。
[Abstract]:Karashayi formation of Carboniferous is one of the most potential strata in clastic rock field of Tahe Oilfield, but it is deep buried, small size of sand body and unknown main controlling factors of hydrocarbon accumulation. It is urgent to carry out zone fine evaluation. Based on the analysis of hydrocarbon distribution characteristics, fault system, sand body and underlying strata of Karasayi formation of Carboniferous system, the "multi-map overlap" method is adopted to map the distribution of superimposed reservoirs and hydrocarbon display, fault distribution map and sedimentary facies map. The stratigraphic distribution map is formed to form a comprehensive evaluation map of Karasayi formation. The study area is divided into three zones on the plane, and the trap types for the next exploration are pointed out. Among them, the most favorable area is to search for underwater distributary channel, "flake" distribution of underwater break fan, river mouth dam and other lithologic traps; The favorable areas are mainly to search for the "strip" distribution of underwater distributary channels, estuarine dams and sheet sand lithologic traps, and the potential areas are mainly to search for "flake" distribution of sand-flat lithologic traps.
【作者单位】：中国石化西北油田分公司勘探开发研究院;
【基金】：中国石油化工股份有限公司油田事业部重大勘探先导项目“塔里木盆地古生界碎屑岩重点区带评价与突破目标优选”(P12056)资助
【分类号】：P618.13

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