基于储层构型下的辫状河砂体精细刻画——以渤海湾P油田为例  

Fine characterization of braided river sand bodies based on reservoir configuration:a case study of Bohai Bay P Oilfield

作　　者：李冰 LI Bing(Tianjin Company,CNOOC(China)Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《石油地质与工程》2025年第2期79-84,共6页Petroleum Geology and Engineering

摘　　要：从野外露头及现代沉积观察和测量入手,利用岩心、测井及动态资料分析储层构型及其控制下的剩余油分布规律。通过不同级次识别标志将渤海湾P油田砂质辫状河识别出三级构型单元,并结合动态资料进行验证并加以完善,为综合调整方案的顺利实施提供依据。其中辫流带级次在垂向上依据岩心冲刷面及测井曲线突变界面确定划分期次数,在侧向上根据识别标志结合边界动态响应特征确定了辫流带平面展布情况,受层间隔层的遮挡影响,注入水沿不同层段水洗,剩余油主要集中在隔层不发育的砂体顶部及薄砂体中,可以通过加密井网提高剩余油动用程度;心滩坝级次可通过测井及压力测试判断其控制范围,坝体顶部连通性变差,导致坝体上部剩余油富集,为水平井挖潜提供方向;心滩坝内部级次的剩余油呈多层式分布在砂体内部。根据砂体分布样式及剩余油富集状况,在研究区综合调整阶段优化井位20次,实施3口水平井,取得了较好的效果。Starting from field outcrops and modern sedimentary observations and measurements,the reservoir configuration and remaining oil distribution under its control are analyzed by using core,logging,and dynamic data.Through different levels of identification markers,the sandy braided river in Bohai Bay P Oilfield was identified as a three-level configuration unit.Combined with the dynamic data,it is verified and improved to provide the basis for the implementation of the comprehensive adjustment plan.Vertically,the order of the braided flow zone is determined based on the core erosion surface and the interface of abrupt changes in logging curves.Laterally,combined with the identification markers and boundary dynamic response features,the planar distribution of the braided flow zone is determined.Affected by the obstruction of the interlayer,the injected water is washed along different layers.The remaining oil is mainly concentrated at the top of undeveloped and thin sand sand bodies,and the utilization degree of the remaining oil can be improved by infilled well pattern.As for the channel bars,the control range can be determined through logging and pressure testing.The connectivity at the top of the channel bar has deteriorated,resulting in the accumulation of remaining oil on the upper part,which provides a good guidance for tapping potential of horizontal wells.As for the remaining oil within the channel bars,it is distributed in multiple layers inside the sand bodies.According to the distribution pattern of sand bodies and the enrichment of remaining oil,the well location was optimized 20 times in the comprehensive adjustment stage,and 3 horizontal wells were implemented,thus achieving good results.

关 键 词：渤海海域 辨状河 储层构型 剩余油 井位优化 

分 类 号：TE242[石油与天然气工程—油气井工程]