%0 Journal Article
%T Theoretical computation and numerical simulation of the relaxation of sphere-capillary model saturated with oil and water<br>油水饱和球管孔隙模型弛豫的理论计算与计算机模拟
%A Xu Feng
%A Liu Tang-Yan
%A Huang Yong-Ren
%A <br>许峰
%A 刘堂晏
%A 黄永仁
%J 物理学报
%D 2008
%I 
%X According to Brownstein-Tarr theory and using the series expansion method, the Bloch equations controlled by diffusion effect are solved for double-phase pore space of sphere-capillary model saturated with oil and water, and the theoretical relaxation computational formulas for the sphere-capillary model are obtained. The result shows that the relaxation process of oil is only related to oil saturation and isn't associated with pore structure on the condition of wetness. A great deal of computation simulations were carried out based on the theoretical computational formulas, and the numerical simulation results show that the main relaxation process of sphere or capillary is a single exponential function and the other relaxation processes are negligible. In other words, the relaxation of sphere-capillary model is approximatively a double exponential descending process.
%K NMR
%K relaxation
%K sphere-capillary model
%K Bloch governing equations<br>核磁共振，
%K 弛豫，
%K 球管孔隙模型，
%K Bloch控制方程
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=D054D93640D2D613E90B5D1FFB0B1F32&yid=67289AFF6305E306&vid=11B4E5CC8CDD3201&iid=CA4FD0336C81A37A&sid=64808317C39DF331&eid=AF4A4411BB448A36&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=16