Principle VS acid fracturing hydraulic fracturing principle

Referred to acid fracturing. Is higher than the formation fracture pressure using acid as a fracturing fluid, for without  Proppant  fracturing. Acid fracturing process will depend on the role of acid dissolution dissolution into wall cracks uneven surface, so that the pump stops after pressure relief, crack wall is not completely closed. Therefore, with high conductivity, the restoration and improve well productivity, the effect is obvious. Acid fracturing principle: liquid pressure to crack rock by fracturing fluid and proppant ceramic filling cracks, etc., so that oil and gas flow.

Hydraulic fracturing principle: using ground pressure pump, the high-viscosity liquids (fracturing fluid additive solution) adsorption capacity to significantly exceed the formation displacement injection wells, resulting in high pressure near the bottom of the well, the pressure to force the formation of cracks formation (fracturing Crack is generally 1-3 mm), the proppant fracturing fluid with injected cracks, stopping the pump, high flow capacity will form strata sand filling cracks, play production, by injection role. Related equipment and products: tanks, fracturing pump, sand trucks, sand trucks, manifold cars, car dashboard, fracturing fluid (pad fluid, carrying sand fluid replacement fluid).

China is currently developing a large number of low and ultra low permeability reservoirs and most complex re-development of the old mining field (repeated fracturing), rely on hydraulic fracturing, acidizing and fracturing and other technical measures increasing the effective rate is low, and increasing costs. So choosing the right  ceramic proppant  has become a key oil production.