Oil & Gas Geology ›› 2007, Vol. 28 ›› Issue (3): 320-323,336.doi: 10.11743/ogg20070303

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An improved calculation method for reserve of constant-volume sour gas reservoirs

Cen Fang1,2, Lai Fengpeng3, Jiang Hui3, Huang Zhiwen3, Zou Cunyou3   

  1. 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Jinzhou, Hubei 434020;
    2. Petroleum Exploration & Production Research Institute, SINOPEC, Beijing 100083;
    3. School of Energy Resources, China University of Geosciences, Beijing 100083
  • Received:2006-09-26 Online:2007-06-25 Published:2012-01-16

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Abstract:

The material balance equation for gas reservoir can be used in the calculation of the original gas in place(OGIP) of reservoirs and has been widely adopted in the calculations of gas reserves.However,the equation is not suitable in the calculation for the reserves of constant-volume sour gas reservoirs due to such facts as sulfur may precipitate and form depositions and etc.The neglect of differences caused by sulfur deposition would distort the results to some extent in the calculation of OGIP in constant volume gas reservoirs.This paper levels at such features of sour gas reservoirs and formulates a new material balance equation,which takes the diffe-rences into consideration.The application of the new equation to constant-volume sour gas reservoirs yields positive results and shows that it is more reliable.

Key words: constant-volume sour gas reservoir, hydrogen sulfide, material balance, reserve calculation

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