The final results display that once the pressure stabilization time is 2 min, the coincidence degree with the indoor and industry drilling fluid lost control efficiency is the highest as well as the evaluation results of the drilling fluid lost control efficiency is “good. The natural fractures encountered in https://vertechs21.wixsite.com/vertechs21/post/the-critical-role-of-fluid-rheology-in-modern-oilfield-operations-a-look-through-the-lens-of-verte