METHOD OF DETERMINING DRAINED HYDRAULIC FRACTURING CRACK WIDTH AND DEGREE OF SEDIMENTATION OF PROPPANT THEREIN Russian patent published in 2016 - IPC E21B47/00 E21B43/26 

FIELD: mining.

SUBSTANCE: invention relates to underground bed hydraulic fracturing (BHF) and, in particular, to determination of geometry of drained parts of crack and degree of sedimentation of proppant in BHF in formation productive zone. According to method formation fluid influx profile hydraulic fracture, number of intervals of flow and their intensity are determined. Then, numerical hydrodynamic model of formation fluid flow is created and adapted according to field-geophysical survey, pressure gradient is calculated in BHF in well zone at moment of flow profile determining. Analysis is performed on proppant pack in order to determine dependence of permeability of BHF crack from its width. Formation fluid and filtration equation are solved for each interval of fluid inflow, as result of which drained width of hydraulic fracturing in well zone is determined within whole range of influx. Degree of the proppant sedimentation is calculated as ratio of difference of geometric centre and centre of distribution of intervals of influx to difference in coordinates of upper and lower intervals of influx.

EFFECT: technical result is increase of reliability of determining width of drained part of formation, as well as degree of proppant sedimentation in drained fracture of BHF.

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