Deformation Bands and Associated FIP Characteristics From High-Porous Triassic Reservoirs in the Tarim Basin, NW China: A Multiscale Analysis

Deformation bands are widely formed and distributed in Triassic high-porous rocks as a result of multistage tectonic movement. In this research, core observation, the rock thin section (fluorescence casting section), FIB-SEM, X-ray diffraction, Raman laser, thermometry fluid inclusions were employed to describe macro- micro characteristics deformation their associated relationship with microfractures. Results indicate that main types Lunnan high-porosity sandstone during Yanshanian Himalayan periods under different temperature pressure conditions compaction shear bands, quantity increases evidently distance thrust faults. The density near fault is about 15/m; porosity permeability decrease sharply compared those host rock. Microscopically, two obtained fluid-inclusion planes (FIPs) can be distinguished 51 samples collected from 12 wells by cutting mechanical characteristics. homogenization aqueous inclusion generally characterized peaks, mainly 70–80°C 110–120°C, which Late periods. formation period induced intragranular microfractures improved reservoir seepage capacity. later stage, interlayer barrier low affects distribution oil gas, an important factor study local dynamic field high-quality evolution distribution.