The Research Of Deep Profile Control Displacement Effect In Hai1Block

Hai1block is a common heavy oil reservoir. After nearly30years of waterflooding, the block has entered later development stage. The degree of recovery is32.09%; the recoverable recovery factor is76.91%; and the recovery rate is1.30%.There appeared a series of problems in the development process, such as theremaining oil distribution is scattered; the contradiction of development becameserious in the conventional water flooding; the interlayer and in-layer heterogeneity isstrong; the oil wells generally produce water; the water flooding is inhomogeneous;the injectivity of injection wells is not balanced; and long-term inefficient floodingcauses the underground water storage rate low; the continue water floodingdevelopment potential is small; the adjustment measures effect is poor; and the roomto enhance oil recovery is little. It is urgent to transform the development mode.This study fully absorbed the successful experience of other oil fields, researcheddevelopment technology for Hai1block reservoir characteristic, formulated systemfor deep profile movable gel flooding. The movable gel flooding technology has beenan effective way to improve oil recovery in high water cut stage. According to itsreservoir features, experiments were carried out to study the physical model offlooding, flooding injection parameters optimization design idea. The overallintegration of the flooding clue is "blocking off, adjusting, flooding, and washing", toimprove the swept volume and oil recovery.