Lithological-Mineralogical Peculiarities of Sedimentary Rocks in Abnormal Thermobaric Conditions and Prediction of Oil and Gas Content at Great Depths

  • R. D. Djevanshir
Part of the Computer Applications in the Earth Sciences book series (CAES)


Experimental investigations of Pliocene clays in the Baku Archipelago have noted that the persistence of montmorillonite content to 6200 m is connected with predominance of the process of secondary montmorillonite formation from illite over the process of primary montmorillonite destruction. Based on the mechanism of interrelation and reciprocal influence of clayey-mineral transformation and thermobaric conditions of the sedimentary basin, the author has developed a method for computer prediction of filtration-capacity parameters for terrigenous sedimentary rocks taking into account the influence of thermobaric, lithological-mineralogical, structural, and geotectonic factors. For zones of abnormally high pore pressure and temperature decline, the Southern Caspian Depression (Basin), is a good example where the possibility of montmorillonite preservation to 15–17 km may indicate the probability for discovery of commercial hydrocarbon accumulations at depths of 9 km.


Geothermal Gradient Reciprocal Influence Clayey Rock High Pore Pressure Pore Pressure Change 
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Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • R. D. Djevanshir
    • 1
  1. 1.Azerbaijan Academy of SciencesUSA

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