近源扇三角洲前缘储层构型研究——以文昌A油田珠海组为例  

Study on reservoir configuration of the leading edge of the near-source fan delta:Take the Zhuhai Group of Wenchang A Oilfield as an example

作　　者：孔令辉 KONG Linghui(Hainan Branch of CNOOC(China)Limited,Haikou 570312,China)

机构地区：[1]中海石油(中国)有限公司海南分公司,海南海口570312

出　　处：《复杂油气藏》2025年第1期70-77,共8页Complex Hydrocarbon Reservoirs

摘　　要：油田进入开发中后期,受近源扇三角洲前缘多期砂体叠置影响,剩余油分布规律愈趋复杂,限制了油田的进一步挖潜。通过结合测井、地震等资料,分析了扇三角洲前缘内部构型单元,探讨了近源扇三角洲前缘内部构型级次划分,开展了砂体空间配置样式以及对剩余油影响等方面的研究。结果表明:近源扇三角洲前缘主要发育水下分流河道、河口坝、前缘席状砂3种成因砂体构型单元,建立扇三角洲前缘7级构型划分模型,识别出叠置型、对接型和孤立型3种砂体空间配置样式,结合生产动态特征,分析认为该油组自下而上砂体逐渐退积,扇体南、北两翼孤立型砂体相对较多,连通性差,水淹程度低,剩余油较为富集,为后期调整挖潜的有利区域。As the oilfield enters the middle and late stages of development,the distribution of remaining oil becomes more and more complex due to the superposition of multiple sand bodies at the front edge of the near-source fan delta,which restricts the further exploitation of the oil field.Combined with well logging,seismic,and other data,the internal structure units of the fan delta front were analyzed the division of internal structure levels of the near-source fan delta front was explored,and the spatial arrangement of sand bodies and its impact on the remaining oil were investigated.The results show that the near-source fan delta front mainly develops three types of sand units,namely,subaqueous distributary channels,mouth bars,and frontal sheet sands.A seven-level architectural division model for the fan delta front is established,identifying three types of spatial arrangements of sand bodies:stacked,lateral,and isolated.Combined with the dynamic production characteristics,the analysis suggests that the sand bodies of this oil group gradually diminish upward,with relatively more isolated sand bodies on the southern and northern flanks of the fan body.These isolated sand bodies have poor connectivity and low water flooding levels,resulting in a richer concentration of remaining oil,which are favorable areas for subsequent adjustment and tapping of potential.

关 键 词：扇三角洲 储层构型 单砂体 配置样式 剩余油分布 

分 类 号：TE122.2[石油与天然气工程—油气勘探]