岩电参数在不同温度、压力及矿化度时的实验关系研究

阿尔奇公式中的m、n参数不但与地层岩性和孔隙结构有关,而且还与地层水矿化度、围压和温度的变化有关.从岩石物理实验研究入手,以TZ2井等多口井的低孔隙度低渗透率岩心作为岩电实验研究对象,研究了m值随不同地层水矿化度、围压和温度的变化规律及n值随不同地层水矿化度的变化规律.实验和理论证明了这种关系的存在.这将有助于用阿尔奇公式准确地评价低孔隙度低渗透率地层的含油气饱和度和冲洗带残余油气饱和度.

On Experimental Relations of Parameters m and n with Different Temperatures,Pressures and Salinities

The parameters m and n in Archie equation are not only concerned with formation lithology and pore structures, but also with salinities,pressures and temperatures. In terms of petrophysical experiments, the low porous and permeable cores of several wells such as TZ2 well are taken as testing objects to study the variable laws of m and n with different salinities,pressures and temperatures, from which derived are their experimental relations in theory. These results are conducive to evaluation of the oil saturation in low porous and permeable formation and residual oil saturation in the flushed zones with Archie equation.