Type of particle density proppant selection

Fracturing proppant There are many types, fracturing proppant selection has a significant impact on yield. Proppant selection of main contents include the type, particle size and concentration. Proppant selection and the pressure of the rock formations, environmental conditions and production requirements are closely linked. Select when fracturing  Proppant  fracturing proppant should first consider the nature and the specific geological and engineering conditions of fracture conductivity, combined with the specific geological conditions (such as the closure pressure, rock hardness, temperature, target layer properties) used to meet the engineering conditions (fracturing fluid nature of pumping equipment), and can get a good yield of fracturing proppant. Second, you must also consider the economic benefits, since fracturing proppant variety, quality and origin of large differences in other conditions, the cost of fracturing proppant is also a difference, we must consider the cost performance, combined with the economy to analyze preferred fracturing proppant.
1. Fracturing proppant type selection
It is basically controlled by the closure pressure, when the closure pressure is low, the choice of  frac sand  as a proppant; when the closure pressure higher intensity is generally used in high-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.
2. Proppant particle size selection
Formation permeability, fracture geometry selected for fracturing proppant particle size has an impact, we must consider the following aspects:
1) closure pressure in the closed pressure is not too high, large particles can provide higher flow capacity, and closed at high pressure, the various sizes of proppant conductivity substantially the same, or small particles provide proppant The higher conductivity.
2) filled with proppant fracturing proppant fracture width to meet freely in the fracture transport needs.
3) the requirements of proppant transport larger particle size, the more difficult to carry proppant. In many cases,  Proppant  transport conditions (mainly apparent viscosity of the fracturing fluid) to control the selectable fracturing 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.