EFFECTIVENESS OF AEROGAMMA-SPECTROMETRIC RESEARCH IN SOLVING APPLIED PROBLEMS OF OIL AND GAS GEOLOGY
The article discusses the results of the innovative method of aerogamma - spectrometry, first used in Kazakhstan in 2019 by Geoken in the southern part of the Ustyurt region in order to identify zones and areas potentially productive for the detection of hydrocarbon (HC) accumulations. The data obtained were processed using the thorium - normalization technique, which reduce regional background levels and helps to distinguish zones with low concentrations of potassium and uranium, integrated into a DRAD index. The DRAD anomalies are formed because of hydrocarbon micro - seepages in the form of the lifting movement the microbubbles of gas of light hydrocarbons into the near - surface layers through regmatic systems of faults and fracture. In these layers, chemical reduction processes and changes in pH values take place. All this leads to a redistribution of radioactive elements and is the reason for the appearance of anomalies of gamma activity in the near - surface layers. Using the DRAD index at the Shakhpakhty step and in the Assakeаudan depression, zones and areas that potentially productive for hydrocarbon accumulations have been identified.