دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: when explosives are used to fracture a formation. At the moment of detonation, the explosion furnishes a source of high-pressure gas to force fluid into the formation. The rubble prevents fracture healing, making the use of proppants unnecessary. Compare hydraulic fracturing.

one of several techniques used to break the rock in the near well area. It was an early stimulation method. Fractures formed in this method are short. Although still used, its best application is in perf breakdown and overcoming some near well damage.

n: an operation in which a specially blended liquid is pumped down a well and into a formation under pressure high enough to cause the formation to crack open, forming passages through which oil can flow into the wellbore. Sand grains, aluminum pellets, glass beads, or similar materials are carried in suspension into the fractures. When the pressure is released at the surface, the fractures partially close on the proppants, leaving channels for oil to flow through to the well. Compare explosive fracturing.

n: 1.A stimulation treatment routinely performed on oil and gas wells in low-permeability reservoirs. Specially engineered fluids are pumped at high pressure and rate into the reservoir interval to be treated, causing a vertical fracture to open. The wings o

well sorted and consistently sized sand or man-made materials that are injected with the frac fluid to hold the fracture faces apart after pressure is released.

v: to plug a well inadvertently with proppants during formation fracturing. Sanding out is usually the result of a slowed fracture-fluid velocity, or screening effect, which allows the proppants to become separated from the fluid instead of being carried away from the wellbore. Also called screening out.

n: the tendency of proppants to separate from fracture fluid when the speed, or velocity, of the fluid is low.

the tendency of proppants to segregate in the fluids due to density effects when the fluid velocities drop below turbulence.