Petroleum Science >2013,??Issue 3:??402-407 DOI: https://doi.org/10.1007/s12182-013-0288-z
Heavy oil component characterization with multidimensionalunilateral NMR Open?Access
文章信息
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
文章摘要
since the end of last century. It is important to characterize the composition of heavy oil to enhance its
recovery efficiency. A designed unilateral Nuclear Magnetic Resonance (NMR) sensor with a Larmor
frequency of 20 MHz and a well-defined constant gradient of 23.25 T/m was employed to acquire threedimensional
(3D) data for three heavy oil samples. The highly-constant gradient is advantageous for
diffusion coefficient measurement of heavy oil. A fast data-implementation procedure including specially
designed 3D pulse sequence and Inversion Laplace Transform (ILT) algorithm was adopted to process
the data and extract 3D T1-D-T2 probability function. It indicates that NMR relaxometry and diffusometry
are useful to characterize the components of heavy oil samples. NMR results were compared with
independent measurements of fractionation and gas chromatography analysis.
關(guān)鍵詞
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Heavy oil, multi-dimensional NMR, unilateral sensor