ORIENTATION METHOD OF HYDRAULIC FRACTURING CRACKS IN UNDERGROUND FORMATION, DEVELOPED BY HORIZONTAL SHAFTS

摘要

FIELD: mining.;SUBSTANCE: invention can be used in hydraulic fracturing of formation. To provide controlled initiation and propagation of cracks of hydraulic fracturing, the first hydraulic fracturing liquid is pumped into the first horizontal bore communicating with the formation at least in one selected segment, and first hydraulic fracturing fluid is pressurised in the bore to create in the first borehole a mechanical stress field around every selected segment of the first bore. Second hydraulic fracturing fluid under pressure, containing particles of proppant is simultaneously pumped into the second horizontal bore, located at some distance vertically from the first bore and communicating with the formation in at least one selected segment to allow propagation of cracks from the selected segments of the second bore in th direction to selected segments of the first bore.;EFFECT: higher productivity of the mined formation and accuracy of cracks location.;7 cl, 2 dwg