Abstract: Based on the geologic characteristics of Karamay reservoir in Karamay oilfield, the full?range fiber mixed sand fracturing technology is designed as a measure for stimulation of next step. XJ?carbon fiber laboratory experiment was made for evaluation of the fiber transverse sand?consolidated property, vertical sand?suspended property and fiber?mixed proppant’s fracture long?term flow conductivity.The optimized fiber?mixed concentration of 0.9%~1.2% can completely meet the needs of the operating sand carrier, with little impact of its long?term flow conductivity. The selected domestic special fiber pump and its connection module reduce the cost, improve the precision and increase the efficiency. The cases study from 25 wells and layers indicates that the average daily fluid volume is increased by 3.2 times, the daily oil production increased by 4.4 times after fracturing measures than the measures before, with the incremental single well production of 325 t on average, the total incremental output of 8 130 t. The effect is remarkable