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Title: Monitoring Storage Reservoir Stability Using A Three Dimensional Microseismic Array
Author: H. Reginald Hardy, Jr., Gary L. Mowrey, Edward J. Kimble, Jr.
Source: American Gas Association 1977
Year Published: 1977
Abstract: Research is presently underway in The Rock Mechanics Laboratory at the Pennsylvania State University associated with the developing the stability of underground gas storage reservoirs. Such techniques, once developed, will be extremely useful in establishing realistic optimum storage pressures for existing storage facilities, and for evaluating the mechanical stability of potential storage sites. The phenomenon of microseismic activity, or acoustic emission, as it is sometimes referred to is associated with the fact that when a structure composed of materials such as rock is loaded, micro-level acoustic signals are generated within the structure, often at stresses well below the failure point. These microseismic signals are indicative of the stability of the structure, and with suitable instrumentation they may be detected at considerable distances from their source. In the general area of Geomechanics basic and applied research associated with microseismic activity has been underway for some thirty five years, although the major developments have been made during the last ten years. For further details on the general concept of the phenomenon and its range of application in the geomechanics field, the reader is referred to the recent publication by Hardy and Leighton (1977).

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