The choice of oil fracturing proppant strength standard

The strength of proppant is an important index of its performance. Due to the different composition and production method of proppant, the intensity difference is very big also, such as quartz sand strength 21.035.0Mpa, ceramisite strength can reach 105MPa to crack.

  After hydraulic fracturing, proppant closure pressure effect of cracks in the cracks in the supporting agent, when the intensity ratio of wall rock seam strength, proppant may have embedded formation.

 When the seam wall rock strength than the proppant intensity, and the closed pressure is greater than the intensity of supporting agent supporting agent,
easy to be crushed.

  These two cases will lead to crack closure or permeability is very low. So in order to ensure the flow capacity to fill cracks in the broken, under different close pressures, to all kinds of mesh proppant strength and breaking rate have certain requirements.