Practice and cognition of effective water-flooding development mode in Gaotaizi block of ultra-low permeability reservoir

During nearly 25 years of water injection development in Gaotaizi reservoir LHP oilfield, due to poor physical properties, adaptability well pattern and difficulty establishing effective displacement between oil Wells, linear injection, infill adjustment refracturing tests have been carried out successively. Although certain effects seen, the are short unsatisfactory. In this paper, microscopic pore structure, sensitivity seepage characteristics ultra-low permeability high platform studied through core laboratory experiments. New technology nonlinear test low permeable simulation experiment, research on rules fluid movable has clear about dragon bubble oilfield distance layer, new fracturing adjust organic combination, past into Wells joint network, explore improve single production, ways effect, with types effectively.