Fracturing Job in Adjacent Oil and Gas Reservoirs to Generate Natural Gas Lift: a Case Study in S-26 Well, Sungai Gelam, Jambi

Abstrak

Sungai Gelam-C structure is one of backbone structure in Jambi Field. Air Benakat Formation (ABF) has been known as prolific reservoirs in South Sumatra Basin. Reservoirs in Sungai Gelam-C are belong to Air Benakat Formation which well known as tight reservoirs. Fracturing job is commonly conducted to improve the ability of reservoirs to be able to produce hydrocarbon. In S-26 Well, which drilled in 2018, main targeted reservoir was unfortunately found lower than its estimated as it was below the current water contact. Whereabouts alternative target is M1 sand but it is located very close to M sand which gas bearing sand. As M1 sand is a low quality reservoir, it decided to have fracturing job. M sand which located upper from M1 sand was inevitably ruptured as well. Fracturing’s post job report showed that fracture grew and also hit M sand. It was indicated by high gas oil ratio (GOR) in production report. Instead of creating gas coning effect, the gas benefits well’s production by acting as reservoir’s source of energy.