Application of Multi-Attribute Constrained Prestack Wide-Azimuth Fracture Prediction in Yingmai-2 Area
The Yingmai-2 area is situated on the Yingmai-2 structure in the southern part of the Yingmaili low bulge of the Tabei uplift,Tarim basin.Affected by tectonic movements and magmatic intrusion,a large number of directionally-aligned high-angle fractures were de-veloped on the structure.The reservoirs are mainly fractured.Due to the deep burial depth and strong heterogeneity of the reservoirs in the Yingmai-2 area,predicting these fractured reservoirs using post-stack fracture prediction techniques like coherence,curvature,and ant-tracking proves challenging.Based on the pre-stack wide-azimuth offset vector tile(OVT)domain gather data from the Yingmai-2 area,well-controlled optimization processing of pre-stack OVT domain gather was implemented by employing techniques such as pre-stack denoising and anisotropy time difference correction to yield high-quality pre-stack wide-azimuth gather data.Subsequently,pre-stack facies-con-trolled fracture prediction was conducted under the constraints of post-stack multiple attributes that can represent fractured-vuggy reser-voirs,including gradient structure tensor,amplitude curvature,and residual wave impedance.This methodology can effectively predict frac-tures in ultra-deep fractured-vuggy carbonate reservoirs,and offer valuable insights for the exploration and development of fractured reser-voirs in the Tarim basin.
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