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Title: Applications Of Downhole Borehole Video Camera For Geotechnical And Geophysical Investigations Of Underground Gas Storage Facilities
Author: Joel S. Barbour, David Cummings
Source: American Gas Association 1987
Year Published: 1987
Abstract: The high resolution downhole video camera provides an economical and effective means for obtaining valuable subsurface geotechnical data for investigations of underground gas storage facilities. Such investigations can be done during exploratory, construction, and postconstruction phases. In an open hole, the borehole camera will provide data to determine orientation, frequency, and openness of fractures, bedding planes, faults and cavities. The extent of oxidation or reduction can also be observed. In a cased hole, the borehole camera will identify areas and severity of corrosion and/or encrustation. Additionally, the instrument will provide data for evaluation of casing defects, perforations, collars, or fishing operations. The video camera has proved to be capable of providing data unavailable from other logging instruments and has been used to verify the validity of geophysical logging instruments. The real-time video image is provided during the logging operation for preliminary assessments of the geologic and engineering properties. A color or black and white video tape that allows for in-depth evaluation of the data is generated. Video tapes from successive logs can be compared to assess changes in the borehole characteristics.

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