Gas lift measurement in oil production
Non-invasive gas flow measurement at injection wells on AGOCO’s Al Nafoora oil field
When mature field production starts to decline, operators are forced to re-think how they operate and use new and advanced technologies to extract every drop of their “black gold” from the ground safely and economically. Artificial lift systems are among the most widely used production technologies in global oil operations. Wells that cannot produce liquids at the surface under their own pressure require lift technologies to enable production. Some liquid wells need lift assistance from the beginning and almost all require it sooner or later. The majority of producing wells worldwide currently use artificial lift. One of the most popular artificial lift methods applied in the oil industry, in order to improve oil recovery, is the gas lift method. Its main principal is the injection of gas in the well to reduce the average density of the fluids produced from the reservoir, hence the weight of the fluid column. As a result, the declined reservoir pressure is sufficient to lift the fluids up to the surface. In most cases natural gas recovered from the reservoir is used for gas lift. Depending on the number of wells and size of the gas lift network, real-time flow measurement is required to accurately calculate how much gas is injected into each well and to optimise the gas oil ratio (GOR).