Production Logs fit into three categories : profile logging, fluid identification, and temperature logging.
Profile logging may be used to monitor injection rates in injection wells, to monitor production rates in producing wells, or to detect casing, tubing, and/or packer leaks, and channeling behind pipe in poorly cemented zones.

Production Logs fit into three categories : profile logging, fluid identification, and temperature logging.

Profile logging may be used to monitor injection rates in injection wells, to monitor production rates in producing wells, or to detect casing, tubing, and/or packer leaks, and channeling behind pipe in poorly cemented zones.

Although some tools can handle both environments, there are some methods applicable only to injection profiling.

In general, profiles may be obtained without disturbing dynamic well behavior by using the proper pressure control equipment and operating techniques; i.e., logs can, and should, be run through tubing without having to kill the well or pull the tubing.

Before attempting to obtain a profile log, plan the operation in advance with the logging service company, paying particular attention to :

• expected flow rate

• casing and tubing size, type, and weight

• expected wellhead pressure

• type of Christmas tree connections

• tubing restrictions

• corrosive or poisonous production fluids

• completion records

• openhole logs

Profiling tools available for measurement of fluid flow rates fall into three major categories :

• continuous flowmeters

• packer or restrictor type flowmeters

• radioactive tracers (velocity and tracer modes)

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