Improved Understanding of Static and Dynamic Geomechanical Stability and BHI data Integration: Key for Improving the Completion of a Horizontal Well in Tiered Complex of Laminated Unconventional and Fractured Carbonate Reservoirs

摘要

The deep, sub-salt reservoir complex is tiered with fractured tight carbonate at bottom and top, with the two sub-units of “upper unconventional kerogen” and “lower inter-bedded kerogen-carbonate” in the middle. This depositional setting is challenging for horizontal well placement where the thicknesses of respective sub-units are about 50 and 30 feet with varying geomechanical and petrophysical properties. Additionally, this complexity poses limitations in completions and effective stimulation of the Kimmeridgian-Oxfordian reservoirs in several gas fields at development stage in Kuwait. A horizontal well is placed in the lower sub-unit of the laminated complex of unconventional kerogen and fractured carbonate reservoir as a Maximum Reservoir Contact (MRC) type well. A pilot mother-bore was drilled and logged to identify the lithological properties across the entire vertical domain - facilitates the optimization of horizontal drain-hole placement within the targeted reservoir units.