Analytical comparisons of water coning in oil and gas reservoirs before and after water breakthrough

作者：Weijun Shen^*; Xizhe Li; Xiaohua Liu; Jialiang Lu

来源：Electronic Journal of Geotechnical Engineering, 2014, 19 W: 6747-6756.

• Analytical comparisons
• Critical production
• Gas-water interface
• Interface heights
• Oil and gas reservoir
• Oil water interfaces
• Pressure drawdowns
• Water breakthrough

The problem of water coning into oil and gas wells became one of the major concern in terms of productivity. This paper is to investigate the analytical comparisons of water coning in oil and gas reservoirs before and after water breakthrough. According to two theoretical models established, and the analytical comparisons of water coning were deduced and compared through the corresponding calculation. The results show that before water breakthrough there was a big difference in the pressure drawdown and critical production rate for the oil and gas reservoirs in the same water cone height. After water breakthrough the gas-water interface tends to cone into the water while the oil-water interface at the well's completion is horizontal. Based on the results, there is a good understanding of water coning in oil and gas reservoirs, and it will be significant to guide the development of oil and gas reservoirs with bottom water.

• 出版日期2014
• 单位中国科学院大学