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A platform for research: civil engineering, architecture and urbanism
Selection of optimum underground petroleum storage cavern sites by detailed geotechnical mapping (Syrian-African Rift Valley, Elat, Israel)
Summary An areas near Elat was investigated for the purpose of identifying suitable sites for the construction of mined underground petroleum storage caverns. The area of study is located at the northern tip of the Arabo-Nubian Precambrian Massif, close to the big geo-suture known as the Syrian-African Rift Valley. The Precambrian basement is built mainly of schist, gneiss, and variable types of granite. The area has undergone plastic and ruptural deformations accompanied by phases of basic and acidic dyke intrusions. The goal of the investigation was to study very carefully the complicated, a priori untavourable structure and rock characteristics near Elat, in order to locate a site where underground man-made cavities could be economically designed and constructed. A combination of detailed geological mapping and core drilling was used to evaluate the body of rock selected for study. Geological mapping included the preparation of a series of joint frequency overlay maps to portray distribution patterns of the principal joint sets. Comparison of structural features, including the frequency of jointing, in drill holes with that mapped on the surface led to the conclusion that the structural details observed on the surface can be projected downward with reliability. It appears that detailed geological mapping in this area can eliminate a substantial amount of expensive explorat ory core drilling. A preferred orientation for caverns has been established in the study area and it, is suggested that surface geology be projected down to one or more horizontal planes at the proposed cavern level below the water table to allow final selection of optimum cavern construction sites within the least disturbed blocks of granite.
Selection of optimum underground petroleum storage cavern sites by detailed geotechnical mapping (Syrian-African Rift Valley, Elat, Israel)
Summary An areas near Elat was investigated for the purpose of identifying suitable sites for the construction of mined underground petroleum storage caverns. The area of study is located at the northern tip of the Arabo-Nubian Precambrian Massif, close to the big geo-suture known as the Syrian-African Rift Valley. The Precambrian basement is built mainly of schist, gneiss, and variable types of granite. The area has undergone plastic and ruptural deformations accompanied by phases of basic and acidic dyke intrusions. The goal of the investigation was to study very carefully the complicated, a priori untavourable structure and rock characteristics near Elat, in order to locate a site where underground man-made cavities could be economically designed and constructed. A combination of detailed geological mapping and core drilling was used to evaluate the body of rock selected for study. Geological mapping included the preparation of a series of joint frequency overlay maps to portray distribution patterns of the principal joint sets. Comparison of structural features, including the frequency of jointing, in drill holes with that mapped on the surface led to the conclusion that the structural details observed on the surface can be projected downward with reliability. It appears that detailed geological mapping in this area can eliminate a substantial amount of expensive explorat ory core drilling. A preferred orientation for caverns has been established in the study area and it, is suggested that surface geology be projected down to one or more horizontal planes at the proposed cavern level below the water table to allow final selection of optimum cavern construction sites within the least disturbed blocks of granite.
Selection of optimum underground petroleum storage cavern sites by detailed geotechnical mapping (Syrian-African Rift Valley, Elat, Israel)
Flexer, A. (author) / Braun, M. (author) / Lasman, N. (author) / Russell, B. (author) / Greenwood, L. C. (author) / Saltzman, U. (author) / Larsson, L. (author)
1979
Article (Journal)
English
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