Publications

The paper will discuss the advancement of recent technology high definition resistivity imager convey with drilling assembly (Logging While Drilling) to quantify fracture geometry and vuggy porosity in highly fractured carbonate. Oligo- Miocene carbonate Kujung formation in East Java Basin will be penetrated with high angle well and completed with Inflow Control Device (ICD) to manage water breakthrough from the presence of the fracture. High definition borehole images typically required to quantify the fracture and vuggs presence to characterize and locate the potential water breakthrough. High definition resistivity images conveyed with electrical cable has been used for decades to quantify fracture geometry and vuggy porosity. However, the risk registered will be high if it is deployed in high angle well with the reservoir has been depleted. There is very high potential of stuck and mud losses because the fracture and depleted carbonate reservoir. Recent development technology of logging while drilling high definition resistivity images which has pixel resolution 0.25�. The borehole image was acquired through an array of eight buttons that has the pixel sizes to 0.25� for each button. LWD high definition imaging tool has an advantage of scanning 360 deg along the borehole; circumference without any gap along the borehole. The images were acquired in real time and the advance processing performed after the recorded data which has full sampling images was retrieved. The position of the packer and ICD then optimized according the advanced processing conducted. The LWD high definition images show high fracture intensity in some interval which has potential of water encroachment. This interval needs to be isolated with packer to prevent early water breakthrough. The quantification of vuggy porosity was extracted from the images to enhance the reservoir petrophysical property.