B.W. McDaniel and Loyd East, Halliburton Energy Services

Horizontal completions in lower permeability formations often result in a need for effective hydraulic fracturing stimulations for many of these wells to reach economic production levels. Cost constraints seldom allow the use of methods such as cemented completions and individual fracturing of numerous zones with bridge plug isolation. Some newer methods require expensive downhole jewelry. By implementing a coiled tubing (CT) deployed hydrajet perforating method and pumping the fracturing fluid slurry down the CT/casing annulus, the operator can use lower risk liner completions (cemented or not). Individual zones are perforated, fraced, and then sand-plugged one at a time. With the ability to reverse up the CT between stages and after all fracs are completed there is only one CT intervention and one frac mobilization needed. The allowable frac rates can be quite high and stimulation costs are greatly reduced by being able to perforate/frac multiple times within the same day.