Fractal-Based Approaches to Pore Structure Investigation and Water Saturation Prediction from NMR Measurements: A Case Study of the Gas-Bearing Tight Sandstone Reservoir in Nanpu Sag

Pore space of tight sandstone samples exhibits fractal characteristics. Nuclear magnetic resonance is an effective method for pore size characterization. This paper focuses on characteristics from nuclear (NMR) samples. The relationship between the dimension NMR with structure and water saturation parameterized by analyzing experimental data. Based it, a characterization classification water-saturated prediction in gas-bearing reservoir have been proposed. To verify models, 19 selected Shahejie Formation Nanpu Sag that 16 them under different states are analyzed. application result new methods shows consistency has facilitated development providing non-electrical logging idea quality evaluation prediction. It provides valuable scientific resource engineering petrophysics unconventional types, such as sandstone, low porosity, permeability shale, carbonate rock reservoirs.