Origin of shallow gas production from the Buda and Georgetown formations in the Pruitt #1 well, Robertson County, Texas.

摘要

The Pruitt #1 well in Robertson County, Texas, was drilled in June 2000 with horizontal laterals in the Buda and Georgetown formations. The well was completed and initial production was 1.6 million cubic feet of gas, and two barrels of oil per day. Buda and Georgetown production in the area is mostly oil. Did the Pruitt #1 well drill into a natural “gas cap” in the area, or is the gas from this well derived from depth, possibly up the Mexia fault zone?; The analysis of gas samples from the Pruitt #1 and other wells shows that the gas from the Pruitt #1 well is not typical gas from the Eagleford, but is typical gas from the Bossier. The proximity of the Pruitt #1 to the Mexia fault zone makes it possible for gas to have migrated from depth up into the fractures of the Buda and Georgetown formations.