Abstract
Abundant shale oil resources are developed in Chang 7 layer of Qingcheng oilfield in Ordos Basin, which has become an important resource guarantee for oilfield development. It is of great significance for shale oil well location deployment and fracturing operation to predict fracture distribution by 3D seismic. In recent years, high-density wide azimuth 3D seismic acquisition and OVT seismic processing in Ordos Basin provide the basis for seismic fracture prediction. In this paper, through the forward modeling of Hudson’s theoretical model, it is clear that the influence of fracture density and dip angle on seismic anisotropy is obvious. Through multi-parameter test, eight azimuth angles and 800−2200 m offset range are selected as fracture prediction parameters. The OVT fracture prediction results are highly consistent with the imaging logging. The fractures in the work area are basically distributed around the fault, mainly formed by the release of fault stress. Through the analysis of the relationship between fractures and shale oil horizontal well fracturing, it is clear that fractures have an important impact on fracturing pressure and drilling leakage.
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Zhu, J., Zhao, YH., Wang, YG., Zhao, DY., Du, GH. (2022). Application of OVT Seismic Fracture Prediction Technology in Shale Oil Reservoir of Ordos Basin. In: Lin, J. (eds) Proceedings of the International Field Exploration and Development Conference 2021. IFEDC 2021. Springer Series in Geomechanics and Geoengineering. Springer, Singapore. https://doi.org/10.1007/978-981-19-2149-0_323
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