Hydraulic fracturing in highly heterogeneous formations by resisting formation and/or sealing micro-fractures

摘要

Well completion technology for resisting imbibing frack fluid into an inner surface of a frack comprises pumping a frack fluid into the wellbore to form a fracture in a formation surrounding a wellbore. In one example, formation of transverse micro-fractures extending transverse to the fracture is resisted to resist absorption of the frack fluid into the formation through the inner face of the fracture, or into existing transverse micro-fractures or transverse micro-fractures formed by the pumping of the frack fluid. In another example, a sealer is added to a frack fluid to sealing or coating an inner face of the fracture with the sealer. In another example, micro-particles with a size less than 100 microns are added to the frack fluid.