DRILLING FLUID LOSS EVENTS IN THE DENVER BASIN AQUIFERS
In all four wells, the fluid loss occurred near the contact of the Cretaceous Fox Hills Sandstone and the overlying Cretaceous Laramie Formation. Fluid loss occurred in a highly permeable or fractured sandstone at depths of approximately 2,000 feet. Despite the fluid loss zone encountered in these wells, many other wells have been completed without significant fluid loss in the same geographical area.
Important lessons were learned as a result of these fluid loss incidents regarding the importance of drilling fluid volume, mud program control, reaction time in the case of a fluid loss incident, and awareness of the potential for fluid loss incidents to occur in the Denver Basin.