低渗透油层水驱油实验录井资料响应特征分析

Analysis on well log data response characteristics of water displacing oil test in low permeable reservoir

通过开展低渗透模拟注水驱油实验,以稳态法测定油-水相对渗透率,制备饱和油、低、中、高含水及残余油的不同含水率的岩样,对岩样进行岩石热解、饱和烃气相色谱及荧光显微图像分析,研究热解、饱和烃气相色谱参数及荧光显微图像特征随含水上升的变化规律及趋势;总结了低渗透油层水淹变化录井资料响应特征;探讨了低渗透油层的水淹机理并对实验数据中产生的特殊现象进行了分析。实验证明录井各单项资料能够反映低渗透油层不同水洗状况下的特征,为今后录井资料评价低渗透油层不同水淹程度奠定了理论基础。

By developing low permeability simulation water flooding test, oil/water relative permeability is tested by stable state method and samples of saturated oil, low/medium/high water and various water cut of residual oil are prepared. Furthermore, analysis on rock pyrolysis, gas chromatograph of saturated hydrocarbon and fluorescent microgram for samples are developed, variation rules and trend of pyrolysis, gas chromatograph of saturated hydrocarbon and fluorescent microgram features followed by water cut increasing are analyzed, log data response features generated from variation of waterflooding in low permeable reservoir are summarized, mechanism of water flooding in low permeable reservoir is discussed and special rules generated from lab data are analyzed. The results demonstrate that various log data can reflect features under various water flushing conditions in low permeable reservoir, providing theoretical foundation for future evaluating different range of waterflooding used by log data.