A newly introduced logging-while-drilling (LWD) capability, 3D reservoir mapping, provides a detailed representation of subsurface structures to improve well placement in complex reservoirs, services company Halliburton announced
3D inversion, an advanced reservoir mapping process, reveals overlooked features such as faults, water zones or local structural variations that can considerably alter the optimal landing trajectory of a well, Halliburton said. In geosteering applications, the technology maximizes contact with oil and gas zones while mapping the surrounding formation to identify bypassed oil, avoid drilling hazards and plan for future development.
“This unique technology moves beyond layered reservoir models to full 3D characterization of the reservoir, enabling accurate well placement,” said Lamar Duhon, vice president of Sperry Drilling. “In complex formations, visualizing data in a 3D environment helps operators significantly enhance reservoir understanding to drive better drilling decisions and maximize asset value.”
The 3D capability originates from downhole measurements taken by the EarthStar ultra-deep resistivity service, an LWD sensor that identifies reservoir and fluid boundaries up to 225 feet (68 meters) from the wellbore, Hallibrton said. This range more than doubles the depth of detection of other industry offerings.
An operator in the North Sea recently deployed the 3D capability in a field with a long history of production and water injection. The data allowed the operator to better assess the movement of reservoir fluids and visualize fault boundaries, which supported more accurate well placement and increased production.
Offshore Engineer | July 17, 2019