Title :
A Study on Multivariate Forecast Model of Threshold Gradient Based on Grey System Theory
Author :
Zhu, Changjun ; Wang, Bin
Author_Institution :
Coll. of Urban Constr., Hebei Univ. of Eng., Handan, China
Abstract :
It is well known that there is threshold pressure gradient in low permeability porous media. The mathematic principle of GM(1,N) for threshold pressure gradient was firstly studied. Then the actual measurement data of threshold pressure gradient during the experiment were collected, and 11 reliable data were gained. By selecting 4 factors including viscosity, permeability, density and porosity as the grey modeling forecast indicators, the multivariable forecast model of GM(1,4) for threshold pressure gradient were respectively constructed. The result calculated by use of the model shows that the precision meets the requirements of engineering and the model can be used for predicting TPG. The application of this approach can supply basic data for the development of low permeability oilfield so as to save cost and labor.
Keywords :
flow through porous media; forecasting theory; gradient methods; grey systems; GM mathematic principle; Grey Model mathematic principle; grey system theory; low permeability porous media; multivariate forecast model; permeability oil field; threshold gradient based; threshold pressure gradient; Automatic control; Automation; Control system synthesis; Educational institutions; Permeability; Predictive models; Pressure control; Pressure measurement; Reliability engineering; Systems engineering and theory; evaluation precision; multivariable; prediction; threshold pressure gradient;
Conference_Titel :
Control, Automation and Systems Engineering, 2009. CASE 2009. IITA International Conference on
Conference_Location :
Zhangjiajie
Print_ISBN :
978-0-7695-3728-3
DOI :
10.1109/CASE.2009.70
