Study on asynchronous injection and production of horizontal Wells in ultra-low permeability thin layer low abundance oil field

The ultra-low permeability, thin layer and low abundance GLN area is developed by waterinjection with horizontal straight combined well pattern. With the extension of development time, water appears in multiple sections directions Wells, gradually enters stage medium high cut, which shows characteristics rising when injected, falling liquid stopped, limiting profile control pressure rounds Wells. Therefore, developing “note mining, mining without note” asynchronous injection-production adjustment technology, make full use artificial fracture permeability channel matrix suction effect between permeable formation increase crack near swept volume, to achieve purpose steady control, up level special wellblock improve recovery factor. Through mechanism injection-production, pore throat boundaries, respect such as timing parameter optimization research, reservoir numerical simulation theoretical formula, conduct field practice, improved well, have achieved good economic benefits, for next class middle cut explore a new way governance.