Finding the optimal daily rate that balances production with drawdown can have significant positive economic impacts by avoiding reservoir damage and recovering more hydrocarbons over a well’s life cycle.įield examples from shale plays demonstrate the importance of pressure management. There is a balance between the rate at which a well is produced and its economic feasibility over time. In ultralow-permeability reservoirs, the impact of pressure drawdown management on well performance and reserves recovery is mostly related to pressure-dependent permeability. Unmanaged pressure drawdown also can create geomechanical issues in high-pressured reservoirs, and lead to a rapid transition from transient flow to boundary-dominated flow in unconventional gas reservoirs. An example is hydraulic fracture conductivity impairment caused by proppant crushing, embedment and fines migration. Studies in shale reservoirs indicate that aggressive or unmanaged pressure drawdown can have a number of detrimental consequences on flow capacity, EURs and well economics. ![]() The industry’s experience in unconventional plays such as the Eagle Ford, Haynesville and Utica shales underscores the importance of balancing high initial production rates with pressure drawdown considerations to potentially increase well productivity, profitability and estimated ultimate recovery. MORGANTOWN, W.V.–The ultimate goal in shale reservoirs is to produce wells at the highest economic rate while maintaining the integrity of the reservoir and completion, ensuring the maximum value of each producing asset over time.
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