Natural oil and gas seeps on the Alaska Peninsula led to early-day oil drilling in several areas of the peninsula. One such area was the Iniskin Peninsula, located on Lower Cook Inlet near the northern portion of the Alaska Peninsula. By 1975, nine wells had been drilled on the Iniskin Peninsula; all encountered encouraging oil and gas shows but none attained commercial production. Logs and drilling records were studied and it appears that all wells experienced common problems, including trouble with hole caving. All wells encountered encouraging gas formations at shallow depths, and the deeper wells encountered strong flows of salt water at depth. The last well drilled on the Iniskin Peninsula encountered hot salt water and steam.