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官142区块是正韵律巨厚砂岩油藏,经过多年注水开发,油藏底部产生“次生”底水,受储层垂向物性的差异及层内隔夹层的不稳定分布影响,油层水淹严重,剩余油分布零散,挖潜难度大。为进一步提高采收率,本文应用动态监测资料,采用数值模拟技术,对区块水驱规律及剩余油分布规律进行了深入研究。结果表明:剩余油主要分布在厚油层的顶部,结合水平井即可提液增油,又可控制底水锥进的优势,在该区块实施水平井挖潜剩余油潜力,取得了较好的应用效果。水平井技术在官142区块正韵律厚油层次生底水油藏的成功应用,为同类型油藏开发后期剩余油挖潜提供了借鉴。
Block 142 is a very thick rhythm sandstone reservoir. After years of waterflood development, the “secondary” bottom water is produced at the bottom of the reservoir. Affected by the vertical physical properties of the reservoir and the unstable distribution of interlaminar layers, the oil layer Serious flooding, the remaining oil scattered scattered, difficult to tap the potential. In order to further improve oil recovery, this paper applies dynamic monitoring data and numerical simulation technology to deeply study the law of waterflooding and the remaining oil distribution. The results show that the residual oil mainly distributes on the top of thick oil layer, combining the horizontal well can increase the liquid and increase the oil, but also control the advantage of bottom water coning. In this block, Application effect. The successful application of horizontal well technology in the positive rhythm thick oil-bearing secondary bottom water reservoirs in Guan 142 block provides a reference for tapping potential of the remaining oil in the late development of the same type reservoirs.