Patel, the native-born New Zealander, who is on an existing contract with Cricket Wellington, has been given dispensation to miss the first three matches of the Plunket Shield season. He will join up with the England squad when they arrive in Christchurch next week.
"I don't know how it's going to pan out, I don't even know if I'll be any good at it," Patel said, looking ahead to the stint. "But I really want to give it a good go. I think I've got some attributes that can help some guys.
The 39-year-old off-spinner has played 24 Tests, 43 ODIs and 11 T20Is for the Black Caps in which he scalped 65, 49 and 16 wickets respectively.
England play five T20Is and two Tests in New Zealand, starting on November 1 in Christchurch.