Applying seismic sedimentology for high-resolution and quantitative imaging of fluvial channel sandstones: An example from Bohai Bay Basin, China
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School of Earth Resources, China University of GeosciencesSchool of Earth Resources, China University of GeosciencesBureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin
作者
Zhiwei Zeng;Hongtao Zhu;Hongliu Zeng
摘要
The complex braided channel sandstones in the Miocene Guantao Formation of Bohai Bay Basin, China, presents a challenge for reservoir prediction in the area with strong effect of the Tanlu strike-slip fault system. Following the principle of frequency fusion by Zeng (2017), we developed a workflow to generate user-controlled linear combination and RGB color blending of RMS frequency panels to quantify the channel sandstones. A linear combination of three frequency panels from -90° data can lead to a reasonable correlation between the width of seismic event and sandstone thickness ranging from 6-28 m. Two different RGB color blending analysis of three selected frequency panels are also conducted here with obviously advantages in illustrating sandstone thickness. Generally, the RGB blending based on -90° phase data has higher resolution on vertical section than the one based on the RMS frequency panels, whereas the later one has higher resolution on the stratal slices. The proposed RGB blending based on the RMS panels can effectively improve the horizontal resolution which may reduce the uncertain impact of manual interfaces interpretation in complicated areas. This would be useful for us to identify potential thick channel sandstones reservoir for future hydrocarbon exploration.
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