Utilization of E-line tractor in horizontal, high pressure - high temperature gas wells
TemperatureGreater than 325°F
PressureGreater than 10,000 psi
Horizontal sectionsOver 3,000 ft
Total depth (TD)More than 17,000 ft
To increase the reservoir contact area, a significant number of wells are constructed with long reach horizontal sections. Multistage fracture operations are primarily conducted using plug and perforation technology to establish reservoir connectivity and production.
The stimulation work involves multidisciplinary teams conducting simultaneous operations in a limited work space and time.
* - Safe, reliable, and efficient technology to convey the perforating Bottom Hole Assembly (BHA) to the target depths in the long horizontal section during some stages of the plug and perforation operations.
* - Available, reliable, and readily deployable contingency perforating option for plug and perforation operations.
HPHT horizontal gas wells
Based on the experience of conducting several plug and perforation stimulation jobs in Saudi Arabia, the electric-line (e-line) tractor has proven to be a reliable and consistent well intervention solution. The tractor-conveyed cement evaluation tools have produced high quality interpretable data used to design the multistage fracture job. Post-fracture diagnostic work has also been successfully performed in the horizontal sections to evaluate tubular integrity, providing valuable information for future fracture design.
Moreover, tractor-conveyed perforating has proven to be an effective solution for conducting stage-1 toe perforations in comparison to other options from several aspects. The option of contingency perforating in a closed system without fluid injectivity into the previously perforated stages has helped to maintain the continuity of operations.
Successful tractor interventions have been performed in wells with more than 3,000 ft of horizontal sections, Total Depth (TD) of more than 17,000 ft, temperatures greater than 325°F, and pressures greater than 10,000 psi.
The Well Tractor was regarded as a revolution in the industry when it was introduced in the 1990’s. It enables operators to extend the reach of traditional e-line deployment into highly deviated and horizontal wells.