关键词: 高分辨率, 层序地层学, 自然伽马测井, 测井约束反演, 温米油田, 侏罗系, 油藏开发

Abstract: Taking the oil-bearing series of Wenmi Oilfield in Turpan-Hami Basin as an example,this paper has studied the techniques and methods for high-resolution sequence stratigraphical research within reservoir in terrestrial oilfield in development stage.A new method was proposed that recognition and correlation of flooding surfaces and chronostratigraphic units through the integration of cores,well-logging and well-logging constrained seismic inversion data.Through the comprehensive analysis of formation relation, natural gamma ray logging data,gamma ray spectrometric data,petrology and x ray diffraction,the origin and sequence stratigraphic significance of the low-gamma shale were studied.The results show that the low-gamma shale was deposited in the lake-flooding stage which inhibited the deposition of minerals with high radioactivity such as k-feldspar and mica,so the low gamma shale may be referred as the recognition marker of flooding surfaces.The correlation of flooding surfaces and high resolution chronostratigraphic units can be made using well-logging constrained seismic inversion data.Based on this,a high resolution chronostratigraphic framework of oil-bearing series of the Sanjianfang formation in Wenmi Oilfield was built,which provides the basis of research of reservoir flow units and percolation barriers.

Key words: high-resolution, sequence stratigraphy, natural gamma ray logging, well-logging constrained seismic inversion, Wenmi Oilfield, Jurassic, reservoir development