Hydraulic fracturing. The first experimental use of hydraulic fracturing was in 1947, and the first commercially successful applications were in 1949.
As of 2012, 2.5 million hydraulic fracturing jobs have been performed on oil and gas wells worldwide, more than one million of them in the United States.[4][5] Frac job in progress Geology[edit] Mechanics[edit] Fracturing in rocks at depth tends to be suppressed by the confining pressure, due to the immense load caused by the overlying rock strata and the cementation of the formation. Veins[edit] Dikes[edit] Low-level minor intrusions such as dikes propagate through the crust in the form of fluid-filled cracks, although in this case the fluid is magma. Non-hydraulic fracturing[edit] Fracturing as a method to stimulate shallow, hard rock oil wells dates back to the 1860s. Hydraulic fracturing in oil and gas wells[edit] The relationship between well performance and treatment pressures was studied by Floyd Farris of Stanolind Oil and Gas Corporation.
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