Integrative technology of sand-control and water-injection for injection well of sanding oil reservoir

An integrative technology of sand-control and water-injection was presented to improve the injection efficiency and oil recovery.This technology contains new integrative pipe string for selective sand control and selective water-injection,optimization of leading fittings such as distribution manifold,packer and releasing gadget of sand-control pipe,and completion of setting,grappling,injection,sand-control,well cleanup,unfreezing and debugging.A technology of real-time packer sealing detecting is developed which will reduce ineffective injection string and improve reliability of sand-control string.This technology has been applied in 32 wells in Shengli oil field for separated flooding.This technology is proved to be quite practical and owns a promising future of popularization.