Mapping Fracturing With Pressure Change

Photo courtesy of Statoil.
This rig is drilling in the Eagle Ford for Statoil, which has been using a method it developed to track the impact of hydraulic fracturing using wellhead pressure data at several nearby wells. It is now marketing the test to others.

A  service using pressure data from a few nearby unconventional wells to map fracturing will soon be for sale.

Statoil developed the method, and has used it to improve how it completes wells in three US unconventional plays, said Matt Dawson, investment manager at Statoil Ventures, which created a company to market the method, called Reveal Energy Services.

The approach assumes that in formations where most of the hydrocarbons are trapped in a dense, nearly impermeable matrix with a limited number of fractures, the pressure of the flow through those pathways can be measured in nearby wells.

The signals—a poroelastic pressure response—can be 10–100 psi, said Dawson, who also helped create the method.

The extremely limited flow in the formation, and the fact the monitoring wells are pressurized with water to protect them from the fractures growing from the well to be stimulated, ensures that the measurements are of “the pressure profile in the stimulated fracture,” he said.

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Mapping Fracturing With Pressure Change

Stephen Rassenfoss, JPT Emerging Technology Senior Editor

27 April 2016

Volume: 68 | Issue: 5

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