渤海海域垦利6-1油田新近系复合河道砂体地震描述技术  

Seismic description technologies of Neogene composite channel sand bodies in Kenli 6-1 oilfield,Bohai Sea

作　　者：周东红 谭辉煌 张生强 ZHOU Donghong;TAN Huihuang;ZHANG Shengqiang(Bohai Petroleum Institute,Tianjin Branch of CNOOC China Limited,Tianjin 300459,China)

机构地区：[1]中海石油(中国)有限公司天津分公司渤海石油研究院,天津300459

出　　处：《岩性油气藏》2022年第4期13-21,共9页Lithologic Reservoirs

基　　金：中海石油(中国)有限公司“七年行动计划”科技重大专项“渤海油田上产4 000万吨新领域勘探关键技术”(编号:CNOOC-KJ135ZDXM 36 TJ 08 TJ)资助。

摘　　要：渤海油田浅层新近系复合河道砂体为重要储层。通过莱北地区垦利6-1亿吨级油田的井-震联合资料,开展道集优化处理,提高叠前道集保幅性,并进行了薄互层砂体地震精细描述及流体检测研究。研究结果表明:(1)低频约束的时频空间域AVO校正方法有效提升了研究区叠前道集的AVO保幅性。(2)三维砂地比约束的分频迭代随机反演技术实现了研究区新近系复合砂体叠置关系的精细刻画和储层厚度的准确计算。(3)三元约束流体检测技术可削弱非烃异常影响,增强地震流体异常与构造高低信息的匹配度,大幅提高了研究区地震流体检测的吻合率,从而提高了岩性油气藏勘探的成功率。The shallow Neogene composite channel sand bodies are important reservoirs in Bohai oilfield. Based on well logging-to-seismic integration data of Kenli 6-1 oilfield in Laibei area,gather optimization was carried out to improve the amplitude-preserved properties of pre-stack gathers,and fine seismic description and fluid detection of thin interbedded sand bodies were completed. The results show that:(1)The AVO correction method in time-frequency space domain with low-frequency constraints effectively improves the AVO amplitude-preserved properties of pre-stack gathers in the study area.(2)The iterative frequency-divided stochastic inversion technology constrained by three-dimensional sand to stratum ratio realizes fine characterization of the superposition relationship of Neogene composite sand bodies and the accurate calculation of reservoir thickness in the study area.(3)The fluid detection technology with three-parameter constraint can weaken the influence of non-hydrocarbon anomalies,enhance the matching degree between seismic fluid anomalies and tectonic high and low information,and greatly improve the coincidence rate of seismic fluid detection in the study area,so as to improve the success rate of lithologic reservoir exploration.

关 键 词：复合河道砂体 AVO校正 随机反演 流体检测 岩性油气藏 新近系 渤海油田 

分 类 号：TE122.2[石油与天然气工程—油气勘探] P631.4[天文地球—地质矿产勘探]