Performance oil fracturing proppant

The role of oil fracturing proppant (Fracturing Proppant) that separates the two wall cracks and effective support, so that after the fracturing always cracks can be effectively supported, thus eliminating most of the radial flow formation, formation fluids to linear flow way into the cracks. Usually require fracture permeability formation permeability than several orders of magnitude. Understand the type of proppant and closed in a state of stress, performance evaluation and proppant fracture conductivity to support a variety of factors influence, is the right choice and use of proppant foundation. 

Oil acid fracturing  application must meet the following performance requirements: 

(1) high strength. Ensure high closure under pressure to obtain the most effective support can still crack. Proppant type and different composition, its intensity is different, the higher the intensity, the greater the pressure capacity. 

(2) particle size uniformity, sphericity. Proppant uniform particle size can improve the bearing capacity and permeability of the proppant. The proppant particle diameter currently used is usually 0.45 ~ 0.9mm (i.e., 40/20 mesh), sometimes with a small diameter of 0.9 ~ 1.25mm (i.e., 20/16 mesh). 

(3) less impurities. Support in order to avoid clogging the pores and cracks reduce fracture conductivity. hydraulic fracturing sand impurity refers carbonate mixed in the sand, feldspar, clay, iron oxide and other minerals; a marine acid solubility measured in the presence of carbonate fracturing sand, feldspar, and iron oxide content; used to measure the turbidity is present in the oil fracturing proppant sand content of clay, silt or inorganic substance particles. 

(4) low-density bulk density is preferably less than 2000kg / m3, in order to facilitate delivery of fracturing fluid and proppant filled fractures effective. 

(5) high-temperature saline is chemically inert, does not chemically react with the fracturing fluid and the reservoir fluid, to avoid contamination of the propped fracture; 

(6) Adequate supply cheap.