Multistage frac ports milling solutions on wireline. The first in the CIS

01.05.2014

Conventional multistage frac port seat drill out technologies require large amounts of fluid to be pumped into the wellbore for downhole motor activation in case if tubing or coiled tubing is used. In wellbores drilled in low pressure formations the fluid pumped into wells may be pumped directly into the formation, which results in lost circulation, damages the reservoir, makes impact on the general production level.

An operator developing a field in the Northern Kazakhstan uses multifrac stinger for fracturing operations. At one of the well development stages it was required to mill the ID of multifrac port seats to allow access for logging, well intervention and well stimulation tools into the wellbore. Tubing with WS or WO rigs and CT-units were used for such operations until recently, which used to be quite costly and often affected the production level. Extensive scope of CT-units or WS rigs preparation for mobilization and rig up also contributes to the overall complexity of planning and activity performance.

Switching to wireline for this activity allowed for the use of minimized scope of required equipment, personnel of the mobile wireline unit and tools and the crew comprising a few people. Moreover the time required for system arrangement and rig up was shortened to several hours.

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