Study on the evaluation method and influencing factors of fracture conductivity of hydraulic fracturing support in shale reservoir

The conductivity of supporting fractures is an important parameter to evaluate the hydraulic fracturing effect shale reservoirs, and its size affected by many factors. In this paper, proppant optimized evaluated on basis real rock slab simulation actual construction test. laboratory experimental study influence type, sand concentration, embedding fluid residue propping fracture carried out, results show that average 40 / 70 mesh about 7.15d · cm at 5kg m2 concentration under condition reservoir closure pressure 50MPa, which can basically meet requirements main Kong 2 in Dagang Oilfield; damage guar gum embedment are two factors cause great decline slab, has a conductivity, reaching 50%; stronger mud (the higher clay content is), greater degree is, loss is; for same lithology, particle little impact conductivity. larger smaller is.