PARAMETRIC WORMHOLE STUDIES ON MATRIX ACIDIZING CARBONATE RESERVOIR

• Main Author: Marcos Mota, Teodoro
• Format: Theses
• Language: Indonesia
• Subjects: Pertambangan dan operasi berkaitan
• Online Access: https://digilib.itb.ac.id/gdl/view/38694
• Institution: Institut Teknologi Bandung

Stimulation using matrix acidizing can cause a wormhole around the well so that it can increase the permeability around the wellbore which results in a decrease in skin values. Wormholes are channels that resemble natural fractures that have very large permeability. Wormhole is the formation of branched holes in formation as a result of acidizing treatment. Skin is a barrier factor that affects the rate of production. If it is positive it means there are obstacles. Skin is an area of formation that is damaged or repaired. Skin is formed around the wellbore. Skin is positively valuable if the area is damaged and negatively valued if the area was improvement or stimulation. In this study, by knowing the acid volume value, permeability ratio (k/ks), porosity of the original formation, fractal dimension values and injection rate, calculations were performed using the equivalent hydraulic radius concept and making a plot to see the effect on skin factor reduction and increasing of productivity index (PI). The indicator of the success of implementing acidizing stimulation can be seen from the decrease in skin factor, increases in well productivity (productivity ratio) and increased production rates.