惠民凹陷临2-6块油藏的剩余油分布及其水平井挖潜

Residual oil distribution and tapping its latent power with horizontal well technology at Lin2-6 Block of Huimin Sag

临2-6块是受临2断层切割而形成的断鼻型油藏,N g33段储层为河流相正韵律厚层砂岩,储层的层内非均质性较强。在油藏进入高含水开发期后,N g33段油层的剩余油分布规律复杂,挖掘难度大。为了充分挖掘剩余油,本文开展了该油藏的剩余油分布规律研究及水平井方案设计。实践表明,水平井技术对高采收程度油藏具有较大的适应性,使单元日油能力和油藏采收率大幅提高,实现了该类油藏特高含水期的高产稳产开发。

Lin2-6 block is a fault-fold with payzone of Ng3^3 segment. Ng3^3 segment reservoir is a set of positive rhythm thick sandstone of the fluvial facies. On the whole, the reservoir takes as some Heterogeneous character, and the upper part has lower permeability. The residual oil distribution of Lin2 -6 block become complicated duiring the high-water exploration period. In order to tapping the residual oil, the studying of the residual oil distrii^ution is carried out, and some horizontal wells are designed according the residual oil distribution above. Practice shows that horizontal well technology has good adaptability in Lin2-6 block, and daily oil production and recovery efficiency are enhanced.