The phosphate-containing interlayers of the Bazhenov Formation as potential reservoirs |
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| Authors: | A G Kalmykov E A Manuilova G A Kalmykov V S Belokhin N I Korobova O M Makarova E V Kozlova R A Khamidullin V A Shishkov A G Ivanova |
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| Institution: | 1.Department of Geology,Moscow State University,Moscow,Russia;2.Center for Hydrocarbon Recovery,Skolkovo Institute of Science and Technology,Moscow,Russia;3.Institute of Geography,Russian Academy of Sciences,Moscow,Russia;4.Shubnikov Institute of Crystallography of FSRC “Crystallography and Photonics”,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The possible reservoir type of the Bazhenov Formation relative to the intervals enriched in phosphates (apatite varieties) is described in this work. The phosphate rocks are characterized by a highly developed pore space; their porosity can reach up to 14%. Along with this, these rocks have explicit geochemical characteristics of oil-reservoir rocks in comparison with other rock samples in the well. As an example, the productivity index and oil-saturation index for phosphates are twice as high as the background values. The composition of such rocks can slightly vary: fluorine can be observed in phosphate minerals, while the rock is always enriched in organic matter (>8 wt %). |
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