"studied the feasibility" is correct and usable in written English.
You can use it when you want to refer to the process of examining the practicality of an idea or plan. For example, "The project team studied the feasibility of constructing a new school building."
Jennifer Aley, an environmental planner who studied the feasibility of a trail for the trail advocates in the early 1990's, has hiked the whole right-of-way.
The authors studied the feasibility of an aluminum vapor chamber to provide more low cost devices.
We studied the feasibility of a cryocooler cooled 15 kW h HTS-SMES for system stabilization.
We studied the feasibility of using MSCs as a source for corneal tissue engineering.
Louis Meilink Jr., a principal at Ballinger, an architecture firm that helped shape the St . Vincents proposal, acknowledged that his company had not studied the feasibility of a two-building hospital joined by a bridge or tunnel.
"The smaller turbines that he's talking about almost don't pay in terms of kilowatts per hour produced," said Daniel Karpen, a Long Island engineering consultant who has studied the feasibility of wind power.
Earlier, the U.N.A.M. scientists who had studied the feasibility of the Cocula dump-fire scenario had claimed that steel automobile-tire wires had not been found among the ashes.
Back in the 1960s, when researchers first took seriously the idea that dietary fat caused heart disease, they acknowledged that such trials were necessary and studied the feasibility for years.
We studied the feasibility to rescue the animals by conditional elimination of the T cells with ganciclovir (GCV) treatment.
We have studied the feasibility of using normalised phase space to measure the effect of space charge.
The Brazilian Metrology Institute (Inmetro) studied the feasibility of the production of a candidate CRM of chloramphenicol (CAP) in milk.
