Implementation methods of frac sand fracturing process uses sand

Implementation methods of frac sand fracturing process uses sand the ends off the frac sand technology uses one thousand EMU will viscosity frac sand fluid and filling gravel unconsolidated sandstone formations by significantly higher absorption capacity of displacement, high resin coated silica sand ratio, high pump pressure the laminated crack wide open after a short and filled with a lot of gravel, sand forming the ends off, then the inner tube empty gravel loop filling. Short wide gravel filling cracks frac sand the formation of dense, clogged with pollution through the bottom of the well, and makes unconsolidated sandstone oil flow pattern by radial natural gas fracturing becomes linear pre-construction flow, greatly reducing bottomhole producing pressure drop and liquid flow rate reduce output fluid carrying sand on the formation and to control sand production and enhance near-wellbore reservoir flow capacity, with a significant increase yield and reduce the heavy oil thermal recovery steam injection pressure effect, the combined effect of good shale gas. frac sand fracturing and gravel packing involves two processes, from the program points, there are two steps to complete the process and the completion of a string method.Two-step method is the complete frac sand and gravel packing twice the construction is completed, the completion of the so-called first column refers to the use of gravel packing method of construction prior to the formation frac sand string filled, and then the gravel screen casing annulus filled within , once construction is completed by two processes trip string.

Shale gas is mined out from shale gas

Shale gas is mined out from shale gas, shale or dark subject at high carbon shale, the shale gas is adsorbed on the body in order to exist in the free state or shale, high-carbon mudstone, shale and pink sandwich on sandy rocks in natural gas, which can generate various stages proppant production of organic causes the body to free gas phase (about 50%) present in the cracks, porosity and other reservoir space to adsorption state (about 50%) exists in kerogen, clay particles and pore surface, a very small amount is stored in a dissolved state kerogen, asphaltene and petroleum. Natural gas is also present in siltstone, silty mudstone, muddy siltstone sandwich-like, or even sandstone formations. After gas generation, the nearest gathered in the source rock, showing typical. Shale gas exploitation in situ reservoir model, the Fracturing proppants difference with the oil shale, oil sands, bitumen and other large. Conventional reservoir gas reservoir is different, both shale gas generated source rocks, but also gather and save gas reservoir and cap rock. Therefore, the organic matter content of the black shale, mudstone and other high-carbon is often the best conditions for the development of shale gas. Shale gas development has a wide range of geological significance, is present in almost all of the basin, but due to the depth of burial, gas saturation and other large differences with different industrial value respectively. Fractured shale gas Chinese traditional sense, shale oil and gas reservoirs, fractured shale reservoirs, fractured reservoirs, etc. roughly equivalent to this, but did not consider frac proppant the mechanism of adsorption is not considered one of the native properties of natural gas, and in understanding the body is gathered in the cracks in the shale oil and gas in free phase. Therefore belong to shale gas incomplete sense. Therefore, China's fractured shale reservoirs concept and connotation of shale gas in the United States today are not the same, respectively, in the material content of hydrocarbons, storage phase, there is a big difference between the source characteristics and chemical composition and other aspects.