GENERATION AND DESTRUCTION OF MICRO-OIL A T GREAT DEPTHS

By the example of 6.5-9.6 km deep boreholes, a comparative analysis of geochemical data on generation and destruction of micro-oil in the de posits with organic matter of different compositions and concentration s has been performed over a wide range of meso- and apocatagenesis (MC 3 - AC(3)) processes. It is shown that the ratio of these two processe s, and hence, the lower depth of deposits of liquid hydrocarbons depen d on the saturation of organic matter with lipids. The higher it is, t he more intensely and longer form and then are destroyed oil products. In mixed organic matter the generation is complete at the MC4 stage, and the subsequent intense destruction of substantially humus and subs tantially sapropelic varieties manifests itself at the MC5 and AC(1) s tages, respectively. At the AC(2) and AC(3) stages the destruction is sharply retarded, because thermally stable components begin to dominat e in the C-15+ bitumenoid. In the sapropelic varieties of organic matt er, which are present in high concentrations in domanikoid deposits, t he generation at the AC(3) stage is intense, and the destruction is in significant. On the basis of these data a limiting depth of commercial accumulations of liquid hydrocarbons is forecasted.