LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (6): 138-144.doi: 10.3969/j.issn.1673-8926.2015.06.019

Previous Articles    

Production decline trend of shale gas

Zhang Diqiu 1,2,Li Zhiping1,2,Su Hao1,2   

  1. 1. College of Energy Resources , China University of Geosciences , Beijing 100083 , China ; 2. Key Laboratory of Unconventional Natural Gas Energy Geology Evaluation and Development Project in Beijing , China University of Geosciences , Beijing 100083 , China
  • Online:2015-12-20 Published:2015-12-20

Abstract:

Shale gas reservoir has low permeability, in which fluid hardly flow and wells have smaller production capacity. The production decline trend of shale gas reservoir is largely different from conventional gas reservoir. The study on shale gas production decline trend is a reference to predict future production changes, development indices and indicators, subsequent adjustment of development measures. Based on Arps decline equation and generalized Weng’s model, a new model, compound decline model was proposed. Because the compound decline model has more general applicability rather than Arps decline equation, it was applied to shale gas production decline trend analysis in this paper for the first time. Then the changing parameters and influencing factors of compound decline model and Arps decline equation used on shale gas production were computed and analyzed. Comparing the compound decline model with the Arps decline equation in case of practical application in Haynesville shale and Barnett shale, it was tested and verified that there are great differences between the production decline trends of two categories of shale gas field.

Key words: calcareous interlayers , carbon and oxygen isotope , origin analysis , controlling factors , Zhujiang Formation , Nanhai A oilfield

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