Experimental Study on Proppant Embedment Conductivity in Daqing Shale Reservoir

In the nanoscale pore mud shale reservoir in Daqing, proppant embedded prone to make artificial fracture diverting capacity, therefore, to develop different closure pressure, concentration of different particle size and composition, sanding proppant’s influence on the flow conductivity of the experiment, analyze the effect of mud shale reservoir proppant embed change rules of flow conductivity. The results show that, with the increase of closing pressure, the embedment and flow conductivity both decrease to different degrees. The flow conductivity decreases rapidly in the range of 0–10 h. After 30 h, the flow conductivity basically reaches a steady state, the morphology between particles is stable, and the flow channel changes little. Different particle size of proppant on closure pressure is low, diverting capacity difference is very big, the particle size, the greater the conductivity will be high, with the increase of closure pressure, large diameter occurred more broken, different particle size of proppant diverting capacity gap is also gradually reduced, at the same time, increasing the sanding concentration can significantly reduce the embedded degree of proppant. Studying the quantitative influence of proppant embedment on fracture conductivity can provide a basis for optimization of fracturing scheme and parameter design of shale reservoir.