浅水三角洲分流水道储层构型表征与完井方式选择

发布时间：2018-03-14 00:01

本文选题：渤海湾盆地　切入点：浅水三角洲　出处：《石油钻采工艺》2017年05期 　论文类型：期刊论文

【摘要】：为了提高BZ19-4油田单井产量和油藏采收率,开展了浅水三角洲水下分流河道储层构型剖析以及水平井完井方式研究。利用地震、岩心和测录井资料,在构型模式指导下,以垂向分期为重点,分层次对研究区明下段浅水三角洲分流河道进行构型表征;依据构型特征,建立起水平井轨迹与填积层的配置关系模式,结合窄厚条带状砂体特点,进而优化完井方式。结果表明:浅水三角洲水下分流河道可分为复合水道、单一水道和河道内部填积体3个构型层次;复合水道可靠地震资料识别,其宽度为400~1 100 m,厚度为10~40 m;单一水道层次通过组合模式分析及边界识别,得出其宽度为250~350 m,厚度为2~9 m;单一水道内部构型单元通过岩电特征研究及模式认知识别出填积体和填积层2个构型单元。采用水平井深穿透射孔方式完井能有效沟通浅水三角洲填积层上部与下伏的厚储层,为油井增加产量提供了建议。
[Abstract]:In order to improve single well production and reservoir recovery in BZ19-4 oilfield, the reservoir configuration analysis and horizontal well completion method of shallow water delta underwater distributary channel are carried out. Under the guidance of configuration model, seismic, core and logging data are used. Taking vertical staging as the emphasis, the shallow water delta distributary channel in the lower part of Ming Dynasty in the study area is characterized by its configuration, according to the configuration characteristics, the pattern of the configuration relationship between horizontal well trajectory and filling layer is established, and the characteristics of narrow and thick strip sand bodies are combined. The results show that the subaqueous distributary channel in shallow water delta can be divided into three types: compound channel, single channel and internal filling body, and reliable seismic data identification of composite channel. Its width is 400,100m and its thickness is 1040m.The single waterway level is determined by combination pattern analysis and boundary identification. Its width is 250 ~ 350m and thickness is 2 ~ 9 m. The internal configuration unit of a single waterway can be effectively completed by means of lithoelectric characteristics study and pattern cognition recognition of two structural units: the filling body and the filling layer. The method of deep perforation in horizontal well can be used to complete the well. Linking thick reservoirs in the upper and lower layers of shallow delta fill, Suggestions for increasing oil well production are provided.
【作者单位】：中海油能源发展股份有限公司工程技术分公司;
【基金】：国家科技重大专项“大型油气田及煤层气开发”(编号:2016ZX05006-006)
【分类号】：TE257;TE31

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