文档介绍：低渗透油藏含水饱和度预测模型对比研究
摘要:低渗透油藏是我国主要的含油储层类型,但是在油层评价中含水饱和度的确定十分困难,而地层的含水饱和度是一个十分重要的储层参数,根据储层的含水饱和度可初步确定储层的含油气性,因此求取含水饱和度十分重要。本文就针对常用的低渗油藏含水饱和度预测模型进行分析探讨,主要介绍了常用的几种饱和度模型及计算公式,并进行了对比比较。对将近70年来经常用到的阿尔奇公式进行了详细的介绍,从它的来源,意义,发展过程以及如今的使用状况进行系统的探讨。由于阿尔奇公式中的参数与岩性、物性、裂缝展布方向等有关,所以在求取含水饱和度时是很难确定a、b、m、n的准确值,这就造成了求取的含水饱和度很难准确,常常与分析的含水饱和度有所差别,本文研究了参数与孔隙度之间的关系,用实例推导出新模型,降低了公式中参数的影响。
关键词:低渗透;含水饱和度;阿尔奇;模型;对比
Comparative Study of Water Saturation Prediction Models in Low Reservoir
Abstract: The low permeability oil reservoir is the main reservoir types in China, but water saturation is very difficult to determine in the evaluation of reservoir. Formation water saturation is a very important reservoir parameters, based on reservoir water saturation we can initially identifiy the hydrocarbon reservoir, it is important to strike a water saturation. In this paper, we introduced several water saturation prediction models and monly used in low permeability reservoir, pared in detail. Since Archie's parameters related to lithology, physical properties, the direction of crackdistribution and other relevant, so it’s difficult to determine the volue of the parameters a, b, m and n, which resulted in the difficult of determining of the water saturation, and the final results is always difference with the analysis. In this paper we studied  the relationship between porosity and parameters, with examples we