Perforate and fracture multiple zones in a single operation
Due to the stratigraphic profile of the shale and sandstone lenses in Colombia’s Valle Medio del Magdalena, specifically in the Nutria and Tesoro fields, conventional fracturing treatments are performed by grouping several formations together. However, stimulation treatments under these conditions do not guarantee that the fracture connects all the different zones.
In an attempt to connect every zone, the operator pumped massive conventional fracturing jobs. However, a production logging tool (PLT) run showed no fracture conductivity due to swelling clays and proppant settling by gravitational decantation.
After the fracturing treatment, the wells produced until a drop in production was observed. Then, a new set of perforations was opened in an attempt to connect the fractures in the lower zones. This technique showed a temporary increase in production, followed by a quick decline. This decline in production was possibly due to clay swelling, as the massive conventional fracturing jobs contacted undesirable zones.
Because the conventional stimulation technique did not provide the expected production and involved additional well interventions, the client looked for new technological alternatives via its multidisciplinary group (reservoir, production, and operations). The operator chose to use the AbrasiFRAC service.
Eliminate rigs, packers, and frac string
The AbrasiFRAC service perforates and stimulates multiple well intervals in a single field operation, providing reservoir connectivity in less time. It eliminates the need for packers and frac string, which had presented numerous problems in previous treatments.
The AbrasiFRAC service offers a single, simple, rigless completion from shooting to well cleanout. The shooting (jetting), breakdown, and fracturing treatment are performed in hours instead of days. The application of the AbrasiFRAC service also frees up resources, such as workover rigs, for other jobs.