Characterization of Pore Structures and Implications for Flow Transport Property of Tight Reservoirs: A Case Study of the Lucaogou Formation, Jimsar Sag, Junggar Basin, Northwestern China

Quantitate characterization of pore structures is fundamental to elucidate fluid flow in the porous media. Pore Lucaogou Formation Jimsar Sag were investigated using petrography, mercury intrusion capillary porosimetry (MICP) and X-ray computed tomography (X-ray μ-CT). MICP analyses demonstrate that topological structure characterized by segmented fractal dimensions. Fractal dimension small pores (r < Rapex) ranges from 2.05 2.37, whereas large > varies 2.91 5.44, indicating theory inappropriate for MICP. volume tight reservoirs over nine orders magnitude (10−1–108 μm3), which follows a power-law distribution. dimensions larger than lower bound vary 1.66 2.32. Their consistence with results suggests it an appropriate indicator complex heterogeneous network. Larger connected are primary conductive pathways regardless lithologies. The storage capacity depends largely on complexity heterogeneity, negatively correlated less network is, higher capability would have; however, effect heterogeneity transport much more complicated.