METHODS FOR PREVENTING PROPPANT CARRYOVER FROM FRACTURES, AND GRAVEL-PACKED FILTER

摘要

This invention relates to the oil and gas industry, in particular, to methodsaffecting the formation productivity at the oil and gas production stage.A method for fracture propping in a subsurface layer, which ensures a reliableprotection of wells from the proppant carryover from the fracture, has beenproposed.According to the proposed method, a fracturing fluid is mixed with a proppingagent andgranulated binding material with a length-to-width ratio of less than or equalto 10;thereafter, a formation fracturing process is implemented. Then, thegranulated bindingmaterial hardens and forms a homogenous firm mass with the propping agent,whichimpedes the closing of the fracture and precludes proppant carryover from thefracture.Or, a fracturing fluid composition obtained by mixing a propping agent with abindingcompound in the form of a powder whose size varies from about 1 to about 500µm. Agravel-packed filter is then constructed; the said filter is based on theapplication of theworking fluid comprising a propping filler and granulated binding componentwith alength-to-width ratio of less than or equal to 10, or comprising a proppingfiller and abinding compound in the form of a powder with a size varying from about 1 toabout 500microns.