高柳地区新近系地层压力和温度对岩石物性的影响

黄骅坳陷北部南堡凹陷高柳地区明化镇组、馆陶组砂岩属疏松、固结程度较差的储集层，岩心实验结果表明，随着净上覆地层压力（净覆压）的增加，岩石的孔隙度、渗透率均不同程度地降低，并且渗透率的变化幅度远大于孔隙度。与常规岩心分析结果相比，油藏条件下（净覆压大于20MPa）孔隙率约减小3％－10％，渗透率约减小12％－70％。通过研究建立了高柳地区孔隙度、渗透率的净覆压校正关系式，分析得出孔度、渗透率与净覆压之间呈指数函数关系的结论：在净覆压增大的同时，地层温度对该地区岩石物性的影响可以忽略。

Effect of formation pressure and temperature on rock physical properties of Neogene in Gaoliu area

The sandstone reservoir of Minghuazhen Formation and Guantao Formation of Neogene in Gaoliu area of Nanpu sag, northern Huanghua depression is a kind of sandstone reservoir with poor consolidation. The core testing results show that porosity and permeability of reservoir rocks decrease with the increase of net overburden pressure, and the fluctuation range of permeability is more than that of porosity. Compared with the results of conventional core analysis, under reservoir conditions (net overburden pressure>20MPa), porosity decreases about 3% to 10%, permeability increases about 12% to 70%. From the study, the correction formula of porosity, permeability and net overburden pressure was established, and from the analysis, it is concluded that the porosity, permeability and net overburden pressure present exponential functional relation, and the effect of formation temperature on the properties of reservoir rocks of this area should be neglected.