The original source of all energy on earth is the Sun. Locked within the decaying organic matter trapped a mile or more below the earth’s surface, the crude oil molecule contains the highest concentration of potential thermal energy of any naturally occurring substance. Refined, it is the singular material making modern life possible. This molecule, which can be transformed into everything from clothing, to medicine, to building materials, and even human body parts, is so very versatile, it is almost a shame to burn it as fuel. This miracle molecule is not without its drawbacks, of course. Therefore, it is inherent upon us to use this gift wisely and prudently.
Rechsand oleophobic, oleophilic and hydrophobic sands have many applications in the petroleum industry. Rechsand petroleum sand products can be efficiently and effectively applied anywhere where oil and water may come in contact. Rechsand oil sands serve to:
Contain and mitigate water and soil contamination
Increase crude conductivity, extraction and recovery
Decrease use of fracking chemicals
Reduce frictional resistance of the fracturing fluid
Reduce equipment wear
Improve crude oil seepage capacity
Improved yields of 15%-50% can be expected,
while reducing or eliminating fracturing fluid costs and contamination
(Roll curser over diagram for more information)
Depending on the well conditions or containment operation, Rechsand has different sand nanocoatings:
FSS Type I:
low density proppant
FSS Type II:
FSS Type III: Hydrophobic,
FSS Type IV:
FSS Type V:
Rechsand Use in Hydraulic Fracturing
Hydraulic fracturing dominates much of the United States’ energy production. The advancement of this technology is a major economic driver and has allowed the United States to achieve strategic energy independence.
Hydraulic fracturing ("fracking") is a process of extracting petroleum by breaking shale rock and bringing the gas and oil trapped within to the surface. Fracking involves creating breaks within the shale rock layer with small, controlled underground explosions and then forcing gas and oil to the surface. Fracking fluid, a mixture of water, lubricating chemicals and proppant–typically conventional sand to "prop" open the fractures–is forced down the wellbore and into the deep-rock fissures. Large pumps on the surface force the fluid into the well until the pressure is high enough to exceed the breaking point of the surrounding rocks. When the hydraulic pressure is removed from the well, the proppant is carried deep into the fractures by the sudden rush of water. Grains of this proppant remain in the resulting cracks in the rock and hold the fractures open, which allow the natural gas and crude to flow past. A few thousand tons of frac sand are needed to stimulate a single well. Once a well is stimulated, it can produce oil for an estimated 20 to 40 years. Fracking can also be used to re-stimulate previously dry wells.
Each well site is different and can require different combinations of proppant sand to coax petroleum from the shale layer.
Acid and alkali resistance
Low frictional resistance
Reduce fracturing fluid cost
Long-term oil conductivity is 20% higher than ceramsite.
Test results commissioned by Chinese University of Petroleum have shown that Rechsand sand has better long-term oil conductivity than ceramsite.
Excellent acid resistance:
Ceramsite sand after soaking in soil acid solution for 24 hours.
Rechsand FSS I after soaking in soil acid solution for 24 hours.
Low frictional resistance:
Daqing X-230 well: Ceramsite blasting port wear (45m3)
Daqing X-231 Jiafu: Sand blasting port wear (145m3)
High pressure resistance:
Quartz sand (28MPa)
Ceramsite sand (69MPa)
Resin coated sand (69MPa)
Test conditions: 2% KCl solution, 80 °C, 180 days
Quartz sand: 28MPa; ceramsite, resin-coated sand, Fusheng sand: 69MPa
Nanocoated sand is a physical resin coating method surrounding the surface of the grains of sand. Although this method can also improve the strength of the resin-coated sand to a certain extent, generally, the high pressure resistance is poor. At 69 MPa, its surface film coating begins to peel off and the crushing ability decreases. However, Rechsand uses patented physical and chemical methods to change the molecular structure of the surface of the sand grains to form a kind of "eggshell" around each grain. These "eggshells" greatly improve the crushing resistance of Rechsand nanocoated sands. The breaking rate at 69MPa is significantly lower than that of ceramsite.
Since 2008, FSS III has been used in 68 wells in field tests:
Water control efficiency is 95%
Average daily oil increase is 3.8t
Water usage cut by 9.3%
Average effective period is 9.8 months
Cumulative oil increase is 1117t
Total cumulative oil increase is 75970t