Rango Energy Inc. (OTCBB: RAGO) provided an update on drilling operations at the Kettleman Middle Dome project located in San Joaquin Valley, Calif.

Rango’s first well, KMD 17-18, was drilled to a depth of 7,598 feet. The total depth of KMD 17-18 is anticipated to be 13,000 feet.

The Kettleman Middle Dome sits atop a northwest-southeast trending anticline, which parallels the San Andreas Fault to the West and which is responsible for trapping large quantities of hydrocarbons. In addition to the Middle Dome, the entire Kettleman area also consists of a North Dome and a South Dome, the latter of which is often referred to as Lost Hills. The North and South Domes have produced more than 900 million barrels of oil and 3.5 trillion cubic feet of gas, according to the release.

KMD 17-18 is focusing on the oil rich McAdams sandstone formation, a 900 to 1,200 foot Eocene age reservoir located at a depth of 12,000 feet. The McAdams sandstone has been a prolific producer in the adjacent Kettleman North Dome, producing at an average of more than 2.5 million barrels of oil equivalent per well. In addition to the McAdams, other known producing formations include the Temblor Sands, the Vaqueros sandstone, the Kreyenhagen shale, and the Monterey shale.

Drilling has now passed safely through the Monterey shale and casing is being set at the top of the Temblor Sands.

When casing is completed, Rango will begin drilling the Temblor Sands. The Temblor Sands also offers excellent reservoir potential based on nearby wells, which have produced as much as 900,000 barrels of oil from the formation, said Vince Ramirez, Kettleman Middle Dome geoscientist, in the release.

Rango Energy Inc. engages in the acquisition, exploration, and development of oil and natural gas properties in North America. The company is based in Vivian, La.