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Artificial Lift Techbook 2016

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ARTIFICIAL LIFT TECHBOOK: CASE STUDY 36 | May 2016 | W ith today's changing market conditions, oil and gas companies are shifting their focus from capex for development of new well sites to boosting production at existing assets. These companies are implementing strategies that boost profts and lower costs by seeking an investment option that can pay for itself quickly, often in just a few weeks. Today, a vast majority of well oper- ations utilize an artifcial lift method such as gas lift to boost output of wells. However, the gas-lift systems on many wells are often poorly operated and infrequently adjusted. They rarely utilize real-time well data making it virtually impossible to respond to changes in well operating conditions in an opti- mum way. Some assets do not have the advanced functionality required to perform optimization when the site is operating under multiple con- straints. Emerson offers a gas-lift optimizer (GLO) solution based on the use of real-time data gathered from wells within an area and dynamically optimiz- ing the performance of the entire production area while operating within process and resource con- straints. Oil and gas companies that have imple- mented Emerson's GLO solutions have experienced an increase of 4% to 15% or greater in operational improvements by optimizing use of existing assets. Optimizing opportunities at multiwell sites The gas-lift technique of boosting well production works by injecting gas into the well tubing-casing annulus to reduce the hydrostatic pressure that inhibits the movement of the wellbore fuids to the surface (Figure 1). The relationship between gas-lift injection rate and well output fow rate (Figure 2) indicates that increasing the gas-lift injection rate above a certain value might negatively impact the production rate as the backpressure created by the lift gas exceeds the lifting effect. Emerson offers an Solution uses real-time well data to dynamically optimize production while operating within process and resource constraints. Gas-lift Optimization Solutions for Boosting Operating Margins By Lou Heavner Emerson Process Management FIGURE 1. Gas lift boosts well production by injecting gas into the well tubing-casing annulus to reduce hydrostatic pressure. (Images courtesy of Emerson Process Management)

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