A method of control and optimization for plunger-lifted wells

摘要

p[0060]In various aspects, the invention provides a system and methods to improve plunger lift operations, by providing improved estimates for at least one of: a liquid level in a well reservoir at any level, the position of the plunger at any given time, and threshold pressure value and threshold flow rate to make more informed decisions to open, close the valve, and maintain the productivity of the well. The improved estimations include obtaining dynamic operating variables by use of existing surface measurements, and based on historical data and mathematical models developed on the basis of the historical data. This in turn also enables the estimation of other values related to plunger lift operations more accurately./p