Displacement Mud Displacement mud refers to the drilling fluid that is used to replace or “displace” another fluid already in the wellbore. This is often done while running in hole with tools, casing, or liners. When Is It Used During RIH? Running casing or liners: When casing is run into the well, especially to total depth (TD), a clean mud or spacer is pumped to displace cement or contaminated drilling mud. Tool runs (e.g., MWD, LWD, or BHA): Before running in hole with sensitive tools, displa

Rigging Up a Logging Tool for VSP (Vertical Seismic Profiling) Operations involves preparing and deploying specialized seismic tools in a well to collect high-resolution seismic data. This process is critical in geophysical exploration and reservoir characterization. Here’s a step-by-step discussion of the logging tool rig-up for a VSP run: Pre-Job Planning and Safety Checks Job planning: Coordinate with geophysicists, logging engineers, and drilling personnel. Tool string design: Ensure compati