High permeability sand fracturing technology

High permeability formations sand fracturing refers to the high-permeability strata fracturing, they also finished packing sand operations. Conventional gravel packing method for high-permeability formations likely to cause injury, severe lower conductivity. The technology requires TSO end technology, the  fracturing proppant  in high enough concentrations. Sand pumping continues after a period of time increases the net pressure can be further expanded crack width. If necessary, in the construction stage slightly lower pump speed, the proppant can be better filled in the cracks. Experience shows that, compared with the low permeability formation fracturing, high permeability formation fracturing can result in higher fracture conductivity. This will not only be able to get a higher yield, but also a very effective sand control. It should be noted, however, high yield, yield changes, such as flooding are likely to result in sand or sand-emphasis and production.

With micro-fracturing obtain more accurate fracture closure pressure, closing time, fracturing fluid efficiency, initial loss of volume, filtration coefficient data, but also can be designed to produce short, wide cracks, to further reduce the skin factor. Commonly used  hydraulic fracturing  fluid is a linear hydroxyethyl cellulose gel and borate crosslinked fluid, the former main advantage is no harm to the formation of the latter with good reversibility, the  Proppant  pack to restore high permeability rate. The two composite fracturing fluid can protect the formation fracturing can create cracks in the high conductivity for high-permeability formation fracturing very good results. Using a large proppant particles better, is the development trend. Presently preferred is 20/40 mesh sand. Conventional gravel pack sand particles used is too small, can not effectively reduce the near wellbore pressure drop and prevent sand. The adoption of the technology in the Louisiana offshore field penetration 500 × 10-3 ~ 1000 × 10-3μm2 strata, so daily output of up to 28.3 × 104m3, much higher than in the region with a conventional gravel pack production wells . In West Africa, a high penetration in the development of new oil fields, the use of the technology to make skin factor decreased to 2.0, sand production and have achieved good results.