Formation pressure distribution and productivity prediction of fractured horizontal wells in stress sensitive reservoirs

Aiming at the problems of formation pressure distribution and productivity prediction after Horizontal Well Volume Fracturing in stress sensitive reservoirs, methods dynamic permeability threshold gradient are used to deal with influence sensitivity, a numerical simulation method oil-water two-phase flow based on finite element is established. History matching performed basis horizontal well volume fracturing of, which ensures high accuracy. Taking ultra-low sandy glutenite reservoir Baikouquan Formation M18 area Aihu Oilfield as research object, law level sensitivity studied. Analysis calculation results shows that: mainly first year production, effect energy increasing by clarified. Stress affects middle later stage production. With increase loss tends be concentrated low-pressure near artificial fracture, forming an isolation zone resistance, make development far worse.