关键词: 复杂断块, 天然能量, 驱油效率, 波及体积

Abstract: Nanbao shallow reservoir is a typical complex fault block reservoir. According to oil products, 60.9% of the reserves belong to conventional thin oil reservoirs. The reservoir has the geological characteristics of active marginal and bottom water, small fault block and small oil area and has come into extra high water cut stage. Because of low water flooding production rate, it is urgent to carry out technical research to further improve reservoir recovery. The paper regarded the reservoir of NmⅡ4② layer in Gao 63⁃10 block as a typical unit. According to the geological characteristics of small oil sands area and sufficient natural energy, the paper puts forward a new oil drive method named deep huff and puff. Based on the oil well，this new oil drive method can improve the swept volume and flushing efficiency and has the advantages of small scale, low investment and flexible adjustment. It provides technical reference for development and adjustment of similar reservoirs at extra⁃high water cut stage.

Key words: Complex fault block, Natural energy , Flushing efficiency , Swept volume