Teach you a trick: proppant selection should pay attention

hydraulic fracturing proppant selection is a very important issue, because the unreasonable choice for proppant fracturing effect, fracturing costs, even for the success of fracturing have a significant impact. Therefore, the choice of proppant should note the following:
First, proppant selection - type.  Proppant  selection must first study the formation closure stress and rock mechanics parameters and other features. If formations belong to the high closure stress, the proppant to select high-strength ceramic proppant; if shallow, you want to select low-density proppant in strength Ceramic proppant . If the depth of 1500 meters, and its closure pressure of not more than 35MPa, the use of  Frac sand  fracturing will be able to meet the requirements for conductivity. If the use of ceramic in the class strata, its conductivity is not only a waste, but also adds unnecessary operating costs.

Second, proppant selection - particle size. Proppant particle size should be selected according to the formation of brittle fracture or ductile fracture. A direct impact on the formation fracture crack width, and the width of cracks affected the proppant particle size selection. If the pure sand layer which brittle fracture strength, so that the width of the cracks formed relatively long, to meet the large particle size by proppant. And if the clay content is higher, then the formation plasticity is more obvious, the formation of the crack width is limited, this time more suitable choice of small particle size proppant.

Third, proppant selection - conductivity. Proppant choose the ultimate goal is to achieve the required flow capacity, so this point is proppant selection of the most important indicators. Factors affecting conductivity have: sphericity, density, acid solubility and turbidity. In proppant selection process should be carefully these several factors testing.
Also proppant selection must be considered when its broken rate, proppant embedding factor. These factors proppant conductivity properties also have some influence, and in practice has been proven.