面向储层的地震资料处理技术在辽河油田马19井区的研究与应用

Study of Reservoir-Aimed Seismic Data Processing Technology and Its Application in Ma-19 Block of Liaohe Oilfield

随着辽河油田精细勘探的不断深入,在面向储层的油田开发阶段,对三维地震资料特别是高分辨率三维地震资料的需求和应用越来越广泛。因此,在三维地震资料处理阶段,如何运用高分辨率处理技术进一步提高地震资料品质,进一步挖掘地震资料在储层开发中的应用潜力已成为一个非常现实的课题。针对马19井区主要目的层沙一段、沙二段和沙三段地震资料分辨率不够、微小断裂展布不清、水平井部署困难的实际问题,从目标地质研究和井资料分析出发,开展了保幅去噪、一致性处理、保幅叠前时间偏移、CRP道集频带拓展、叠前反演等5项面向储层的高分辨率处理技术研究,对比以往在勘探阶段的地震资料处理,在处理方式上有了很大转变,首次开展了针对油田储层开发的地震处理技术研究,有力地促进了处理向开发领域的延伸,同时也为辽河油田下一步精细叠前反演的推广积累了宝贵的经验。

With exploration continually unfolding in Liaohe Oilfield, the demand for 3D seismic data, high-resolution 3D seismic data in particular, is higher and higher during the stage of reservoir-aimed oilfield development while its application is more and more extensive. Therefore, it is a realistic task at the 3D seismic data processing stage to use high-resolution processing technology for further improvement of seismic data quality and tap the potential for application of seismic data for reservoir development. The study is aimed to solve some actual problems, such as inadequate resolution of seismic data for the main targets in Ma-t9 Block-- Es~, Es2 and Es3, unclear distribution of micro faults, and difficulty in deployment of horizontal well. Based on geological research of the targets and analysis of well data, the study of reservoir-aimed high-resolution processing technology covers five areas, such as amplitude-preserving, expansion of CRP trace gather frequency band, and pre-stack inversion. The processing method sees significant changes as compared to seismic data processing in the previous exploration stage. The study is focused on seismic processing technology for reservoir development of the oil fields for the first time, effectively helping the processing technology extend into the development field. Meanwhile, the study has accumulated precious experience for Liaohe Oilfield to promote fine pre-stack inversion at the next stage.