Abstract
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 secondary porosity (vuggs) 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 and locate the potential water breakthrough.
High definition resistivity images conveyed with electrical cable has been used for decades to quantify fracture geometry and vuggs. However, the well's risk such as potential stuck and mud losses will be high when the well has been depleted and has high deviation well.
Recent development technology of logging while drilling high definition resistivity images 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's circumference without any gap along the borehole. The images acquired while drilling then processed with advance processing to quantify fracture geometry and classification of the porosity in the carbonate system for further optimization on inflow control device position and geometry.
