Resin coated sand used in oilfield fracturing of

Hydraulic fracturing technology after half a century of development , has become a major oil and gas well stimulation Measures . The main mechanism of hydraulic fracturing of oil and gas wells and injection wells yield increase is due to the injection of proppant Supporting role for cracks to form in the formation long enough , has a certain conductivity The sand filling cracks. Visible, proppant Maide fracturing sand effect on impact can not be ignored , proppant material Performance directly affects the fracture conductivity , and therefore is a key factor affecting the hydraulic fracking effect . Branch Performance degree and the greatest impact on the conductivity proppant compressive strength and size is a combination of support agent. Therefore , the proper selection and use of appropriate proppant leaf out key measures of value-added production . A

Kind of ideal proppant should have the following characteristics : high compressive strength , the pressure to adapt The purpose of cracking under the pressure of a closed layer wonder broken, the biggest support puzzled crack width , with Have a lower density , in order to ensure ease of delivery of the pump in the construction process , and in the cracks Press Expected requirements laid ; in hot brine good chemical inertness, not hydraulic fracturing fluid and reservoir fluid

Chemical reaction , to avoid contamination with the fracture proppant , uniform particle size distribution , circularity For Find a good read , with better purity and low impurity levels , in order to avoid air strikes proppant fractures

The lower conductivity ; sources wider, low cost. Usually applied pressure for proppant Effective fracture closure pressure , the proppant is thus preferably be used as an effective closing pressure proppant Under pressure.