Method and device for calculating dynamic reserves of gas reservoir with water-sealed gas reservoir

• Main Authors: SHI JUNTAI, LI WENBIN, ZHANG LONGLONG, WANG-TIAN DUOYI, YANG BO, JIA YANRAN, SHI GUIYUAN
• Format: Patent
• Language: Chinese; English
• Published: 21.01.2022
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention discloses a method and a device for calculating dynamic reserves of a gas reservoir. The method is used for the water-sealed gas reservoir and comprises the following steps of: acquiring reservoir physical property parameters of the gas reservoir and production dynamic data of the gas reservoir; acquiring capillary pressure difference between the water-sealed gas reservoir and a main gas reservoir according to the reservoir physical property parameters; acquiring average formation pressure of the water-sealed gas reservoir according to the reservoir physical property parameters, the production dynamic data and the capillary pressure difference; acquiring a natural gas deviation coefficient of the gas reservoir according to the reservoir physical property parameters, the production dynamic data, the formation pressure of the water-sealed gas reservoir and relative density of natural gas; determining an original geological reserve model of the gas reservoir according to an oil-gas material balance