Method for Calculating Dynamic Reserves of Water Drive Gas Reservoir with Considering of Water-Sealing Gas

Abstract:

When research the behavior of water drive gas reservoirs, especially with large water influx, the first concerned is, how many gas is sealed, how many water seals the gas Therefore, it is very important to study the amount of water-sealing gas, unsealed gas, and water influx. The amount of unsealed gas influences the Recovery Efficiency, and the water influx influences the drainage intensity, when we take the measures of Strong Drainage Gas Recovery, in the future. In this paper, we analysis Material Balance Equation; establish objective functions with Formation Pressure and gas production data; auto-match by Least-square Method; directly calculate the dynamic reserves of water drive gas reservoir, and the amount of water-sealing gas and water influx. The example calculation of well HB1, proved that the calculation results of this method is more accurate and reliable than in the past, and it is simple and practical as well.

• Periodical: Applied Mechanics and Materials (Volumes 522-524)
• Pages: 1542-1546
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.522-524.1542
• Online since: February 2014
• Authors: Xu Zhang, Wei Hua Liu*
• Keywords: Dynamic Reserves, Material Balance, Water Drive Gas Reservoirs

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