Cen Fang, Lai Fengpeng, Jiang Hui, et al. An improved calculation method for reserve of constant-volume sour gas reservoirs[J]. 2007, 28(3): 320-323.DOI: 10.11743/ogg20070303.
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.