Responding to the current market conditions, oil producers in the Middle East have the objective to optimize their lifting cost and maximize their production. With a number of horizontal wells on their portfolio, they have high expectations when it comes to performing a stimulation treatment on their wells. A high return on investment (ROI) is always the objective for the well stimulation treatment.

Performing a matrix acid stimulation treatment in horizontal wells requires, among other things, a keen knowledge of:

• correctly identifying the target interval;
• proper identification of the most suitable treatment fluid(s);
• the most efficient and save way to place the fluid at the intended target interval.

The reservoir target identification and fluid selection process are done in the office or laboratory environment with a meticulous engineering process. Fluid placement at the well bore can be done either through a bull heading process or more precise placement using coiled tubing (CT). The fluid placement process use indirect surface indicators, given by the available surface pressure and volume readings. However, today, the process have evolve to a more intelligent way of placing the fluid precisely where the design called for, using the ACTive* live downhole CT services. Examples of different type of work performed using ACTive technology are discussed; they are precise zonal isolation and selective stimulation in the Middle East.

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