X well and Y well were two exploration wells deployed in Shunbei Oilfield of Tarim Basin. X well was a field test well with enhanced drilling parameters. Compared with Y well， X well was drilled with better measures for enhanced drilling parameters in actual drilling. The mechanical drilling rate of X well in the third section from 5600 to 7500m was increased by 119% over that of Y well. Comparative analysis showed that X well was drilled with surface equipment with higher pressure； thus achieving higher volume and pump pressure in actual drilling. The bit impact forces for X well and Y well were 0.73 to 1.02kN and 0.61 to 0.85kN， bit hydraulic power 6.79 to 11.38kW and 5.37 to 8.79kW， and specific mechanical energy 0.23 to 2.15MPa and 0.52 to 3.5MPa respectively. In the experiment with enhanced drilling parameters， higher downhole mechanical energy and hydraulic energy were obtained in X well with better rock breaking environment. The mechanical ROP at the third drilling section was significantly higher than that in Y well， which met the expected ROP improvement with enhanced drilling parameters.