摘要
地震波形指示反演的算法核心是在反演过程中用地震数据体高频段的波形信息代替变差函数,使得整个反演流程及结果体现出“相控”的概念,最终能够有效提升储层预测的纵向分辨率及横向精度。L64井区发育沙河街组纯上段埋深大于3700 m的湖底扇体,受深度影响,研究区井数少、砂泥岩波阻抗重合,储层描述难度大。通过尝试使用地震波形指示反演,并在反演过程中增加井曲线优选及曲线重构技术,对L64井区扇体进行精细刻画,结果表明:地震波形指示反演对L64湖底扇体形态、规模及演化规律刻画良好,有力证实了该反演方法在深储层预测,特别是在深储层纵、横向分辨率提升上的技术优势。
The core of the algorithm for seismic waveform indication inversion is to replace the variational function with the waveform information of the high-frequency segment of the seismic data during the inversion process,so that the entire inversion process and results reflect the concept of“phase control”,and can ultimately improve the longitudinal resolution and lateral accuracy of reservoir prediction effectively.In the L64 well area,a lake bottom fan with a burial depth of more than 3700 m in the upper pure section of the Shahejie Formation is developed.Due to the depth,the number of wells in the study area is small,the sand and mudstone wave impedances overlap,and the reservoir description is difficult.By trying to use seismic waveforms to indicate inversion,and adding well curve optimization and curve reconstruction techniques during the inversion process,the fan body in the L64 well area is finely characterized.The results show that the seismic waveform indication inversion has a good description of the shape,scale,and evolution of the L64 lake bottom fan body,which strongly confirms the technological advantages of this inversion method in deep reservoir prediction,especially in the improvement of the vertical and horizontal resolution of deep reservoirs.
作者
王海
WANG Hai(Shengli Oilfield Luming Oil and Gas Exploration and Development Co.,Ltd.,Dongying 257000,China)
出处
《复杂油气藏》
2020年第2期33-37,共5页
Complex Hydrocarbon Reservoirs
基金
胜利油田科技攻关项目“曲堤油田隐蔽油气藏精细勘探技术研究”(YKK1918)资助。
