Anomalous layer temperature
ANOMALOUS LAYER TEMPERATURE (EN: anomalous layer temperature, abnormal seam temperature; DE: anomale Floztemperatur; FR: temperature en соuche anomale; ES: temperatura anomal en capas; RU: аномальная пластовая температура) is the sharply changed temperatures within the limits of the local structures in comparison with the background temperature, which is characteristic for the corresponding layers of the large structural-tectonic elements. They distinguish the anomalously high and anomalously low layer temperatures.
Their origin is most often associated with natural factors, but there is known also the series of the technogenic ones. They refer to the first ones the lithological, tectonic, hydrogeological ones. There influence significantly the establishment of the anomalous layer temperature the sharp spatial variation of the thermal conductivity of the rocks, and especially of the layer fluids, the emergence of the heat shields, and periodic volcanic activity. They refer to the technogenic factors the external flooding, injection of significant volumes of industrial wastes, spontaneous ignition of combustible minerals within the layer conditions, and others.
Commonly, the deviation of anomalous temperatures from the background ones amounts to several tens of degrees; exceptionally contrasting anomalous layer temperatures are known, for example, within the Yangantau (Bashkir ASSR) region of the distribution of the gas-thermal jets, where on the condition of the 10-20 degrees Celsius background layer temperature, anomalous layer temperatures at the depth of 25-65 metres reach 219-378 degrees Celsius.
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