Transported to the oil well proppant Precautions

Formation permeability, fracture geometry selected for Proppant  particle size has an impact, we must consider the following aspects: it is basically controlled by the closure pressure, when the closure pressure is low, the choice of  frac sand as proppant; when closed higher pressure , generally used in high-intensity strength ceramic or ceramic. According to the requirements of fracture conductivity and economic use  Fracturing proppant .  Usually more than 3000m deep in our selection of ceramic, ceramic in the deep fracturing chase.
Closing pressure in the closing pressure is not too high, large particles can provide higher flow capacity, and closed at high pressure, the various sizes of the same conductivity proppant, the proppant or small particles provide a higher conductivity . Proppant-filled crack width to meet the proppant in the fracture free transport needs.
Proppant transport requires larger particle size, more difficult to carry proppant. In many cases, the proppant transport conditions (mainly apparent viscosity of the fracturing fluid) to control the selectable proppant size. According to the particle size is typically pumped in batches, the first batch of small particle size, the crack depth migration, the last batch of the largest size, sedimentation in the near wellbore fracture in order to improve penetration in key areas.