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Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).
Drilling in the Wattenberg Gas Field north of Denver, 2005. Although numerous wells had drilled through the Wattenberg Field over the decades, and many drillers and wellsite geologists noticed gas “shows” (indications) in the "J" Sandstone and other strata, the "J" Sandstone and other gas-bearing formations had permeability too low to yield gas in commercial quantities.
During such drilling, data is acquired from the drilling rig sensors for a range of purposes such as: decision-support to monitor and manage the smooth operation of drilling; to make detailed records (or well log) of the geologic formations penetrated by a borehole; to generate operations statistics and performance benchmarks such that ...
Drilling in the Wattenberg Gas Field north of Denver. Oil and gas-producing formations in the Denver Basin. The basin itself forms a petroleum province. Oil and gas have been produced from the Denver Basin since the discovery in 1901 of oil in fractured Pierre Shale at the McKenzie Well, part of the Boulder oil field in Boulder County.
The McKenzie Well (also known as McKenzie #1) is an oil well site in Boulder, Colorado. The Boulder Oil Field was discovered on this site in 1901, making it the oldest oil-producing site in the entire Denver Basin, and one of the oldest in the western United States. The first producing well on the site was drilled in 1902.
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Ute Indians were the first to discover oil, in Colorado. [1] The McKenzie Well still stands, near Boulder, and Isaac Canfield found it in 1901, [2] by dowsing, [1] first producing oil, on February 5, 1902. [3] The McKenzie Well was found, on the ranch or farm, of Neil McKenzie.
The Cretaceous-aged units are the most well-understood and the most productive units in the San Juan Basin. The Inner Cretaceous Seaway's western extent was along the San Juan Basin, and the three major transgressive-regressive episodes that occurred during this time are recorded in the mid- to upper-Cretaceous stratigraphy.