Comparative studies on methods of evaluation of reservoir pore structure by using NMR (nuclear magnetic resonance) well logging data
Liu Wei1, Xiao Zhong-xiang2, Yang Si-yu3, Wang You-jing3
1. College of Earth Resource and Information, China University of Petroleum, Dongying City, Shandong Province, 257061, China;
2. College of Oil&Gas Resources, Xi'an Petroleum University, Xi'an City, 710065, China;
3. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China
Abstract：Four methods which are used to quantitatively evaluate reservoir pore structure by using nuclear magnetic resonance (NMR) T2 distribution were introduced in this paper,by integrating actual data processing for well A in Shengli oilfield,the applicability of the methods was compared and analyzed. The results show that the three porosity component percentage method,similarity comparative method and average saturation error minimum value method didn't consider the affects which was applied by hydrocarbon existing in reservoir pore space to the shape feature of T2 spectrum. The three porosity component percentage method was feasible to evaluate reservoir pore structure for the reservoir and water zone with good pore structure and bad structure,but not feasible for reservoir with moderate pore structure. The similarity comparative method and average saturation error minimum value method can only be used in water zones to construct NMR capillary pressure curves for evaluating reservoir pore structure. The NMR capillary pressure curves constructing method which is based on Swanson parameter utilized the real NMR well logging data and feasible to evaluate reservoir pore structure for different types of reservoir. After comparing with core data the reliability of the results was verified,as a result the method is worth to be promoted in the oil-filed for extensive use and application.
刘卫, 肖忠祥, 杨思玉, 王友净. 利用核磁共振(NMR)测井资料评价储层孔隙结构方法的对比研究[J]. 石油地球物理勘探, 2009, 44(6): 773-778.
Liu Wei, Xiao Zhong-xiang, Yang Si-yu, Wang You-jing. Comparative studies on methods of evaluation of reservoir pore structure by using NMR (nuclear magnetic resonance) well logging data. OGP, 2009, 44(6): 773-778.
