Abstract:

By using a set of balance equation,this paper analyses the production,consumption,input and output of crude oil in 26 provinces in China,in which the oil flow exists.With the ratio of selfsufficiency,these 26 provinces are divided into four productiondemand balance types:basic selfsufficiency,half selfsufficiency,net payout and net supply.After calculating the flow ratios,the 26 provinces are divided into three flow function types:output center,input center and exchanging center.The spatial distribution of output center appears like a rightangle triangle.The spatial distribution of input center appears like an isoscelestrapezium.The spatial distribution of exchanging center appears like an obtuse triangle.According to the main source of crude oil,this paper divides the oilflow space into four flow fields:the North,the Northwest,the East and the South.Among them,the North and the Northwest flow fields are national ones.The route types of oil flow are diversiform,including pipeline,railway,waterway and highway.And the oil flow routes in China form five cluster regions.In the Northeast,the oil flow routes appear like a dendriform network with Tieling as a major node.In North China,the oil flow routes appear like a monaxialbintree with Beijing as a major node.In East China,the oil flow routes appear like a “IIIshaped” pattern.In the Northwest,the oil flow routes appear like a “Xshaped” pattern.In South China,the oil flow routes appear like a “Yshaped” pattern.The different routes of oil flow are either parallelconnected or serially connected with each other,bringing into the multiflowroute benefits.In summary,this research analysed the spatial structure of oil flow,forming a base for the optimization of the spatial organization of oil in China.

Key words: flow of crude oil, productiondemand balance, flow function, flow field, flow route, spatial structure