樊家川油田储层渗流单元分析及其剩余油分布

The analysis of permeable units of the reservoir rocks and distribution of the residual oil in the Fanjiachuan Oil Field, northern Shaanxi

樊家川油田已进入开发后期,为了精确预测层内剩余油潜力,解剖更小级别的储层非均质单元分布,在储层沉积微相研究的基础上,应用储层FZI值进行单一河流沉积单元的渗流单元划分,并讨论了成因砂体与渗流单元的关系以及渗流单元中剩余油分布规律,从而提高了剩余油预测的精度。

The Fanjiachuan Oil Field lies at the juncture of the northern Shaanxi slope and Tianhuan depression. The reservoir rocks in the oil field within the nose or domal structures consist dominantly of the Jurassic Yanan Formation, representing a succession of the fluvialswamp terrigenous clastic coalbearing formations. Now the oil field is in the later stages of development. The present paper deals with the division of the permeable units made by using the reservoir flow layer indicator (FZI) values, and the relationship between the genetic sandstones and the permeable units and the distribution of the residual oil so as to precisely evaluate the interformational residual oil potential and to ascertain the distribution of lowergrade nonhomogeneous reservoir units.