复杂储层识别的地震反演方法及其在塔木察格盆地的应用

Recognition of complicated reservoir by seismic inversion and its application in the Tamtsag Basin

随着油气藏勘探开发程度的加深,准确识别复杂储层变得愈发重要,地震反演已成为储层预测的核心技术。本文对蒙古国塔木察格盆地南部凹陷1 800 km^2地震资料进行波阻抗反演研究,研究工作包括测井曲线的标准化校正、地质框架模型的准确建立及其它反演参数的正确选取。波阻抗反演结果为研究沉积相划分、砂体空间展布的认识提供了可靠依据,在一定程度上解决了该区主要目的层南屯组沉积物源多、相变快和在地震剖面上无法追踪的问题。

During the course of oil exploration and development, it is very important to precisely predict complicated reservoir in petroleum exploration. Seismic wave impedance inversion is already a core technology for reservoir prediction. In this paper,the seismic inversion applied in 1 800 km^2 data in the South Sag of the Tamtsag Basin in Republic of Mongolia. The detailed study included correction of well logging curves, establishment of geologic model and choice of some inversion parameters. The seismic inversion results provided the right data for sedimentary phase research and the spatial spread of sandbodies, to solve some problems in a large extent,such as multiple provenance of the Nantun Formation,sedimentary facies changing quickly, and the difficultly to trace in the seismic profiles.