CT meets new challenges

摘要

Unconventional reservoirs, multilateral wells, horizontal wells and mature fields pose new challenges for coiled tubing (CT) technologies. Stimulating or cleaning out multilateral wells can be challenging without technology designed to navigate and properly enter the various branches. Navigating multilateral junctions For several years, BJ has accomplished these operations using the CT-conveyed Lateral Entry Guidance System (LEGS) tool, an intelligent system for navigating the junctions of a multilateral well. At the end of 2005, the tool was sent to Kazakhstan to aid in performance of acid treatments in two wells that were deeper, at more than 16,405 ft (5,000 m), than any prior well treated using the tool. Due to the common depth uncertainties associated with running CT and uncertainties in the accuracy of the well diagrams provided, locating and running into the lateral can be challenging, even with ideal operation of the intelligent tool.