Development practice and exploration of low permeability reservoir in Bi 304 block of Zhaoao oilfield

Zhaowa oilfield is a low porosity and low permeability faulted nose reservoir, average porosity is 13.6%, the average permeability is 22.5 ×103μm2, main oil-bearing layer is the Hetaoyuan formation I and II section. Bi 304 block was brought into development in 2007, initial oil well production capacity difference is big, water injection well water absorption capacity is bad. After recent years of development and exploration, developing technology for low permeability fractured reservoir as adjusting well pattern matched to fracture direction, perfect well pattern and fracturing reservoir transformation is summarized , which can effectively improve the development effect, and improve the producing degree of reserves. Currently the district average oil production of single well is 4.4 t, composite water cut is 72.43%, the producing degree is 2.12% and the recovery rate is 0.68%.