What Is Wireline?
Wireline in oil and gas refers to operations performed in a wellbore using tools conveyed on a cable (wire) lowered from the surface. There are two main types: electric wireline (e-line), which uses a multi-conductor cable to power and communicate with downhole tools for logging and perforating, and slickline, which uses a single solid wire for mechanical operations like setting or retrieving plugs.
What Are Common Wireline Operations?
- Well logging: Running sensors through the wellbore to measure formation properties (resistivity, porosity, density, gamma ray)
- Perforating: Running shaped charges on wireline to perforate the casing and create flow paths into the formation
- Plug setting and retrieval: Setting bridge plugs for zone isolation or retrieving them after fracturing
- Depth correlation: Establishing precise downhole depth references using gamma ray or casing collar locators
- Production logging: Measuring flow profiles, temperature, and pressure in producing wells to diagnose problems
Wireline's Role in the Well Lifecycle
Wireline operations occur at multiple stages: after drilling (openhole logging to evaluate the formation), during completions (perforating and plug work), and during the producing life of the well (production logging and intervention). Wireline crews are among the most specialized service providers in the oil field.