Paper Information

Journal:   JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)   January 2005 , Volume 38 , Number 5 (87); Page(s) 667 To 678.
 
Paper: 

ANALYSIS OF THE WATER SATURATION IN THE SHALY FORMATION BY USING THE PICKETT CROSS PLOTS

 
 
Author(s):  RAHIMI BAHAR M.H., HOSSEINPOUR SIAMI H.
 
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Abstract: 

In this paper we will discuss about the development shaly models by using effective porosity versus true specific resistively cross-plots, which are affected by the shale group (Ash) in three states: layer, dispersed and total shale. By these methods we can get a realistic idea about the oil reservoir with natural fracturing. The response of equations of aforesaid models prepares some cross plots to calculate the percentage of water saturation. In the proposed methods there are three important parameters including:
1. Porosity parameter (m), which should not be considered equal to 2 and must be determined by trial and error.
2. Specific resistively of water (Rw ), which is measurable in the water-bearing reservoir.
3. All the analyzed shaly layer can be presented in the cross plots contain porosity, specific resistively affected by the shale group (Ash), even if shale volume changes monotonous and continuous. At the end, we discuss about two case studies by using cross plots which are very useful tools in analysis and evaluation of the layer, dispersed and total shaly models.

 
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