Calculation of Grain Size Distribution Using NMR T2 Spectrum and Digital Rock Technology
详细信息
- 责任者：Sun Jianmeng (School of Geosciences ; China University of Petroleum ; Qingdao 266580 ; China) ; Zhao Jianpeng
- 刊名：Journal of China University of Petroleum
- 出版年：2013
- 卷期：37(3)
- 关键词：粒度分析 ; grain-size analysis ; T2< ; sub>谱 ; T2< ; SUB> spectrum
- 页码：p.57-62
- 图表：illus., 1 table, 14 refs.
- 分类号：1600
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
A new method calculating grain size distribution(GSD) was proposed by using nuclear magnetic resonance(NMR) T2 spectrum and digital rock technology.The curve of GSD is approximately consistent with Weibull distribution,so different GSD can be obtained by changing the parameters of Weibull distribution.According to the initial Weibull distribution,digital rock was constructed by process-based method,and then NMR simulation was conducted on this model by random walk method.To go through the parameter region of Weibull distribution makes the simulated T2 spectrum approach the measured one.The Weibull distribution determined by these parameters was the GSD of rock.The method was used to calculate the GSD of underground rock continuously based on NMR logging.The simulated results agree well with the experimental results and validate the accuracy of this method.
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