Perpustakaan Digital ITB

XX-16 is an offshore oil production well located in the YY Field, East Java, Indonesia, targeting the Tuban carbonate formation. The well was previously drilled and completed as a water injection well in December 2012 and was later converted into a production well through a workover in early November 2017. Post-conversion testing indicated low oil production from the Tuban Carbonate intervals. Acidizing stimulation was previously performed; however, the response was insignificant due to silica and clay minerals domination from XRD analysis. Subsequently, hydraulic fracturing was implemented as an alternative stimulation method, however still resulting low productivity index remained which largely suspected by the cause of overestimated permeability in the initial design. This study aims to address the limitations of the previous stimulation attempts by evaluating and redesigning the hydraulic fracturing treatment for XX-16. This study involves sensitivity on selecting fracturing fluid and proppant to achieve optimum performance based on the Productivity Index (PI). The permeability sensitivity is performed to make sure the design is safe and remains applicable to the permeability uncertainties. Additionally, drainage area sensitivity is also performed to indicate its influence on the productivity index on the best scenario. As a result, the redesign shows significant improvement by the Productivity Index of 0.975 and Fold of Increase (FOI) of 3.8.