Effectively development technology for low permeability reservoir in fault block Liu 17

Fault block Liu 17 is the main reservoir of Liuxi Oil Field,and is a typical reservoir with multilayer,low porosity and low permeability.The reservoir has poor production effect since 1983,such as low water injection capacity in injection wells,poor response in oil wells and ineffective maintenance of reservoir energy.The production rate is only 0.8% while reserve recovery is 3.94% because of the improper well pattern and large well spacing.To solve the problems above,some measures have been taken successively in the reservoir,such as synthesized fracture research,integrated infill adjustment,injection-production system adjustment,multiple fracturing,reservoir pollution relieving,etc.As a result,the reservoir development effect has obviously improved and production rate has increased to 1.92%.At present,calibrated recovery of the reservoir is 30.7% and recovery has reached 20.9%.Effectively development of low permeability reservoir has been realized and provides reference for the proper development of such kinds of reservoirs.