Carito field is located in Punta de Mata, Monagas state, in the East of Venezuela. This field is exploited since 1.993, and assisted by gas injection as a secondary recovery mechanism from 1996. The well CRC-19 started its activity in July 2005, with 744 STB/D; 0,617 MMSCF/D; GOR= 829 SCF/STB; °API= 23.8; %Water= 0 and 6.900 psi of initial reservoir pressure. In May the 13th 2013, after a stimulation treatment, the last production test showed that the well CRC-19 was producing 580 STB/D, 0.1 % Water, with 350 psi of WHP and 6.200 psi of static Bottom Hole Pressure (BHP). According to the drawdown of the well, using an additional lift artificial method was evaluated. A low Gas Relation Oil (GOR) and the availability of a high pressure surface gas source were the main factors to define Gas Lift Systems (GLS) as the best lifting method for this well. In July 2.013, CRC-19 was the first well of Punta de Mata District completed with artifcial lift. This configuration includes a coiled tubing positioned inside the hole at 12.000 feet to provide the gas from the injector wells at 7.500 psi. This technique was suitable to avoid both the rig and the 3 months production shutting necessary to instal the conventional gas lift mandrels. During one month the well CRC-19 has been producing 1.600 STB/D, assisted by 2,3 MMSCF/D, which means a 175% of oil production rate increment, besides the benefit of not needing a rig to clean the well, since the coiled tubing is retriable.

The workflow for mature-field redevelopment requires a multidisciplinary team to analyze, select, and rank well candidates for intervention and production optimization. An objective evaluation of the well's productivity and reserves is essential for identifying possible alternatives to increase production. For this study, an analysis was conducted on 152 wells from the Carito field. As the second-largest oilfield producer in the Maturin sub-basin of eastern Venezuela, the Carito field encompasses approximately 150 km2 and comprises the El Carito and Carito south reservoirs. The Carito reservoir presents a high degree of heterogeneity resulting from complex, compressional faulting and varying sediments and includes hydrocarbons containing gas, condensate, volatile, black oils, and tar mat (oil mixed with wet sand). The Carito south reservoir behaves like a black-oil reservoir. The workflow presented in this study identified 20 candidate wells ranked by their potential to increase production. An intervention plan was then defined and ranked according to technical and economic criteria. This paper presents the successful application of this methodology in the Carito field to improve well productivity by approximately 7,000 bpd, proving that the method can be easily adapted to other areas.