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Summary The Kovykta gas condensate field has a complex geological and tectonic structure. Gas-saturated reservoirs bed in the subsalt sediments. However, the prospects for gas of the overlying halogen-carbonate interval approved by well drilling: flow rates reach 200 thousand m3 / day. To predict both the prospects for gas and drilling settings the structure and tectonics have to be examined. The aim of research is to estimate the depth of the faults identified in the suprasalt and halogen-carbonate intervals, and their possible relation to the productive subsalt interval. The analysis includes fault systems location from various vintage data, including the results of the relief lineament analysis and the results of seismic, magnetic and gravity surveys, as well as electromagnetic studies with TEM technique. A comprehensive analysis of geological and geophysical data made it possible to trace the fault zones of the northeastern direction associated with the Orlengsky arch and the Burungino-Bereinsky depression, from the surface to subsalt sediments. The deep-depth origin of the fault zones and the intense fracture were found, which shows the possibility of fluid migration from the productive reservoirs of the subsalt interval to the overlying rocks of the halogen-carbonate interval. |
