基于地震-复合微相分析砂体描述技术研究及应用

Research and application of sand body description based on seismic-compound microfacies analysis

渤海油田近几年新近系的开发实践表明:开发阶段该层系新增油气层多为新发现砂体,沉积特征纵向上为砂、泥互层,横向上砂、泥岩交互发育,这是由于河流改道频繁造成的储层横向连续性差;而有效解决河流相储层的"识别、刻画"成为开发的关键问题,单一的地球物理技术满足不了河流相储层的预测要求。为此,提出在高精度层序地层格架的指导下,基于地震-复合微相分析,结合测井约束反演、地震属性、地层切片等技术,联合进行储层定量预测。

Aecording to the dewdopment effect of Neogene in Bohai Oilfiel in recent years, new hydrocarbon reservoirs are mainly the new-finding sand bodies at development stage. Sandstone and shale interbed is main sedimentary characteristics vertically and sandstone and shale develop ahernately in laterally. That is caused by stream channel migration to form poor reservoir continuity. htentification and portraying of resolving fluvial facies reservoir are a key. Development practice has proved that single geophysical technology can not satisfy the prediction request of fluvial facies reservoir. This article puts forward that the quantitative prediction of reservoir, based on seismic-compound mierofaeies analysis and combined with logging constrained inversion, seismic attribute,formtion slice, can be carried out under the conditions of high-accuracy sequence stratigraphic framework.