Отправлено: 08.02.09 10:23. Заголовок: The influence factors of NMR logging porosity in complex fluid reservoir

The influence factors of NMR logging porosity in complex fluid reservoir
Science in China Series D: Earth Sciences
Издатель Science in China Press, co-published with Springer-Verlag GmbH
ISSN 1006-9313 (Print) 1862-2801 (Online)
Volume 51, Supplement 2 / Октябрь 2008 г.
DOI 10.1007/s11430-008-6002-0
pp 212-217
Subject Collection Наука о Земле и окружающей среде

The influence factors of NMR logging porosity in complex fluid reservoir
RanHong Xie1, LiZhi Xiao2 , ZhongDong Wang2 and Keh Jim Dunn1

(1) State Key Laboratory of Petroleum Resource and prospecting (at China University of Petroleum), Beijing, 102249, China
(2) Well Logging Company of Liaohe Petroleum Administration, Panjin, 124011, China

Received: 25 January 2008 Accepted: 24 April 2008
Abstract Porosity is a basic parameter for evaluating reservoir, and NMR logging is an effective method to obtain the porosity. However, we have often found that there exist significant differences between NMR porosities and formation core porosities in the complex reservoir. In this paper, we list the factors which affect the NMR porosity response in the complex reservoir, such as longitudinal relaxation time (T 1), transverse relaxation time (T 2), hydrogen index (HI) and borehole environment. We show how these factors affect the NMR porosity response and suggest methods to correct them. This should improve the accuracy of NMR logging porosity in complex reservoirs for the terrestrial formation.
Keywords NMR logging - complex fluid reservoir - porosity - influencing factors

Supported by the National Natural Science Foundation of China (Grant Nos. 90510004 and 40674075), the Applied Basic Project of China National Petroleum Corporation (Grant No.06A30202)

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LiZhi Xiao
Email: xiaolizhi@cup.edu.cn



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