Tight or damaged reservoir sections often require stimulation to boost their performance. These sections can be identified during drilling operations (logging-while-drilling measurements) or after drilling using openhole wireline tools. Once the completion is run however, it is impossible to make these measurements, so the effectiveness of a stimulation program must be assessed by measuring the change in flow rate within the completion through, for example, a fracture port.
Direct measurement of the reservoir response before and after a stimulation job to assess a stimulation programme’s effectiveness would be of huge benefit to field operators. In this example, the objective was to identify the reservoir injection flow profile for a horizontal water injection well that had failed to reach its target injection rate.