Geomechanics-based sweet spot prediction for ultra-deep clastic reservoirs in Kuqa depression of Tarim Basin

PetroChina Tarim Oilfield has established China’s largest ultra-deep hydrocarbon production base, with over 180 wells drilled to depths exceeding 6,000 m. Ultra-deep reservoirs in this region are typically subjected to intense tectonic compression, resulting in elevated present-day in-situ stress, abnormal overpressure, and pronounced heterogeneity. Conventional evaluation methods prove inadequate for characterizing inter-well variations in reservoir quality and productivity within these ultra-d