LLOG intersects pay in Who Dat South exploration

LLOG Exploration intersected several hydrocarbon-bearing sandstone intervals in the Who Dat South exploration well in the US Gulf of Mexico, said partner Karoon Energy in an Oct. 28 release.

The well penetrated targeted Miocene zones over a gross interval between 5,000 m MD and final TD of 7,014 m MD. The well’s final total depth was revised from the pre-drill planned total depth of about 7,500 m MD based on interpretation of available well results and operational considerations. Estimated aggregate net pay, based on wireline log data acquired in the 12 ¼-in. hole section, is about 51 m TVT, including one thick, high-quality sandstone with more than 30 m TVT of net pay.

Initial analysis of formation pressure measurements and fluid samples indicate the presence of a high liquid yield gas-condensate fluid. Formation water samples were also recovered to facilitate future geotechnical and development engineering studies. A 9 ⅞-in. production liner has been installed over this interval to enable utilization for potential future production.

A further 16 m TVT of aggregate net pay is interpreted in the 8 ½-in. hole section between 6,250 m MD to final total depth, based on logging while drilling (LWD) and drilling parameters. Adverse borehole conditions prevented wireline logging of this interval, and the preliminary interpretation is not calibrated by formation pressure or fluid samples. The 8 ½-in. hole section will be plugged and abandoned.

Who Dat South was drilled by the West Neptune drillship from Mississippi Canyon Block 589 as a deviated hole (with a wellbore angle of up to 47°) into Mississippi Canyon Block MC 545. It is 11 km west of the Who Dat floating production system in about 780 m of water (OGJ Online, Sept. 9, 2024).

LLOG is operator of the Who Dat South joint venture with 45% interest. Partners are Karoon (30%) and Westlawn Americas Offshore (25%).