利用P^(1/2)法判别储层流体性质

Judging Reservoir Fluid Property with P^(1/2) Method

如何准确、直观地判断储层流体性质一直以来都是测井解释研究的重要课题之一。开发了一种利用计算机图形绘制多口井测井数据的应用程序,实现了用数学上的正态概率分布法来反映视地层水电阻率的变化规律,并根据其变化规律判别储层的流体性质,效果良好。研究结果表明,即便是在孔隙空间结构复杂的储层和地层水的性质未知的情况下,该方法也能够快捷、准确地判断标准水井、气井、气水井的水层和气水层,因此大大降低了测井解释的难度。

How to judge the reservoir fluid property accurately and visually has been one of the projects of well logging interpretation. An application program was developed by processing multiwell logging data through computer processing and graph plotting. The variation rules of apparent formation water resistivity was reflected by using normal probability distribution, according to its changing rules, the fluid property was judged with good result. The study result indicates that the method can be used to quickly and accurately judge the water zone and gas-water zones of standard water wells, gas wells and gas-water wells, even if they are complex pore structural reservoirs and unknown formation water quality. Thus the difficulty of well logging interpretation is greatly reduced.