Study on NGH-Bearing Sample Preparation Methods Optimization by Index Evaluation
摘要
Core sampling preparation is a common simulation way to learn the multi-physical field variations and multi-phase seepage laws in porous media during drilling and production for natural gas hydrate (hereinafter NGH), which is of great significance to ensure production safety and improve mining efficiency. Selecting the yield, fidelity, controllability, intuition, stability and cost as key evaluation indexes, four mainstream NGH-bearing sample preparation methods, including core drilling, sand packing, digital core, etched model, and their derived combined methods, are assessed in multiple dimensions. Then the reasonable optimization and development suggestions are put forward.