Xinjiang Petroleum Geology ›› 1998, Vol. 19 ›› Issue (2): 161-164.

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CORRELATION AND ANALYSES OF WENG CYCLE AND POISSON, GAMMA DISTRIBUTION

Zhang Hujun, Chen Mingqiang, Gu Fagong, Liu Zhanjun   

  1. Oil Production Plant, Yumen Petroleum Administration Bureau, Yumen, Gansu 735200
  • Received:1997-10-28 Online:1998-04-01 Published:2020-11-15
  • About author:Zhang Hujun, Engineer, Oilfield Development

Abstract: The correlation and analyses of Weng cycle and Poisson, Gamma distribution model showed that independent variable of original formula in Weng cycle model is specified time one, that is the time is 1/B of real time.The integral value of original formula with 0~+∞ of independent variable is rather 1/B of recoverable reserves than real recoverable reserve.Althrough original formula in Weng model and Poisson distribution have similar form of expression, Weng cycle and Poisson distribution are two different models because of their different independent variables;Weng cycle model accorded with mathematical principle of continuous Gamma random distribution, in which hypothesis of model parametern being positive integer is improper.Based on above-mentional studies, this paper gave simple and clear structural formula of Weng cycle model.

Key words: Model, Distribution, Production, Recoverable reserve, Prediction