Oil frac proppant application process and principle

Oil  frac proppant  during use:
Fracturing fluids and additives are mixed together, and then is pumped into the formation. Formations will produce cracks at the same time, and then the inside for oil fracturing proppant.
Oil fracturing proppant maintained after reflow cracks. Therefore, fracturing proppant must be strong enough to withstand the pressure of the corresponding closure, the cost ratio is: pumping liquid oil fracturing proppant 25%, 46%, 19%, 10% of acid fracturing chemicals materials.
Oil fracturing proppant fracturing is usually acidic and  Hydraulic fracturing  using:
(1) acid fracturing fluid pressure energy splitting rock fracturing fluid and oil  fracturing proppant  fractures, allowing gas flow.
(2) hydraulic fracturing we inject a high-viscosity fluid (liquid fracturing fluid and additives) into the well, a faster rate than the soil adsorption, which causes pressure around the crack formation and created at the bottom (commonly1-3 mm), and then injected into the cracks of oil fracturing proppant with proppant.
Program Pengshou Liang:
(1). Select the wells and layers. It usually takes 0.5-1 million ^ _ ^ well layers.
(2). Design fractures.
(3). Preparatory work before fracture.
(4). Fracture process differs as well, but they have the same general steps.
(5). Reflow: In order to protect the soil layer, CF should be pumped back underground reflow process. The event will take gelbreaker.
Fracture process following general steps:
(1). Pressure Testing: ability to resist pressure wellhead equipment and ground facilities.
(2). Mat rehydration: Our goal is to crush the carrying fluid formation and the creation of cracks. Preflush can also purify the nearby pitshaft.
(3). Carrying the carrying fluid infusion (CF) as the carrier of  Proppant  function. Although up to the position specified oil fracturing proppant, CF expansion cracks, the formation of cooling down.
(4). Replace infusion: This feature is push CF and ensuring proppant got the right place.
(5). Shut: Close ranging from 4-12 hours, depending on the well design.