石油地球物理勘探2019，Vol.54Issue(2)：380-389,403,前插5,12.DOI:10.13810/j.cnki.issn.1000-7210.2019.02.017
西非泽塔油田1#层剩余油分布时移地震预测
Remaining oil prediction based on time-lapse seismic data in Layer 1#,Zeta Oilfield
摘要
Abstract
Zeta Oilfield in the deep sea of West Africa has been developed for more than 10years,and water displacement has been adopted for oil production for some time.However remaining-oil enrichment zones cannot be determined due to unclear directions of water flooding in injection-production well patterns and uneven displacement for different layers.To solve the problem, we carry out a research on the main oil bed,Layer 1#,and predict remaining-oil enrichment zones based on time-lapse seismic data.The adjacent-trace correlation coefficient on the time-lapse seismic data is optimized as a sensitive attribute for remaining oil prediction. Both the dynamic change of water flooding displacement and the water flooding frontier are clearly delineated on time-lapse seismic data.With the integration of geological structures,sand-body distribution, and adjacent-trace correlation coefficient,remaining oil enrichment zones are successfully predicted.And the following understandings are obtained:A.The impedance of oil-or water-content unconsolidated sand reservoirs is smaller than that of overlying deep-sea mudstone; B.The differences of time-lapse seismic data can basically indicate the range and direction of oil-water displacement,in which the correlation coefficient is more sensitive than others,it can better describe the edge position of oil-water displacement in the period of monitor survey acquisition;C.Based on the comprehensive analysis of oilfield structures,sand-body distribution, and correlation coefficient,three remaining oil zones of Layer 1#in 2013are predicted,among which ZoneⅢand the southern part to WellⅠ-2in ZoneⅡ might be residual oil permanent retention zones.They need to be confirmed by further drilling.关键词
时移地震/流体驱替/剩余油/相关系数/注采联动关系/泽塔油田Key words
ime-lapse seismic/liquid displacement/remaining oil/correlation coefficient/injection-production linkage relationship/Zeta Oilfield分类
天文与地球科学引用本文复制引用
陆红梅,陈文学,徐海,陆文明,陈继华..西非泽塔油田1#层剩余油分布时移地震预测[J].石油地球物理勘探,2019,54(2):380-389,403,前插5,12.基金项目
本项研究受国家科技重大专项"典型油气藏定量表征与开发优化技术"(2016ZX05033-003)资助. （2016ZX05033-003）
