"The problem of prospecting for minerals is essentially a geochemical problem" A.E. Fersman
Geochemical prospecting is an effective, mobile, inexpensive and environmentally friendly method of forecasting, prospecting and exploration of hydrocarbon deposits. The effectiveness of geochemical methods increases in the complex geological and climatic conditions of Eastern Siberia (predominance of non-structural deposits,
ubiquitous development of trap magmatism, salt tectogenesis, etc.). Geochemical methods, in addition to geophysical studies, make it possible to predict the oil and gas potential of the sedimentary section not only on a geological-tectonic basis, but also to carry out a quantitative and qualitative assessment of the hydrocarbon potential of the subsoil.
The complex of geochemical researches includes: field geochemical works, as well as laboratory chemical and analytical studies, and desktop processing of the obtained actual materials by the method of graphical constructions in conjunction with the results of geological and geophysical studies.
The gas and mercury studies are used in geological prospecting in combination with geochemical and geophysical methods for mapping ore bodies and, to a lesser extent, as an indirect method for revealing hydrocarbon deposits and mapping petroleum product plumes. The […]
Radiometric studies are carried out on near-surface sediments in combination with lithological, gas and geochemical, and hydrological gas and geochemical methods, usually on shallow boreholes, holes, or “pits”. Radiometric methods include gamma surveying and radonometry (on soils and surface water). […]
The geomicrobiological method (GMB) is used in combination (or independently) with geochemical studies to identify and localize accumulations of hydrocarbon fluids at depth. The method has been widely developed abroad and it is used in various climatic (including in the […]
Marine geochemical exploration In the search and exploration of oil and gas in the seas (shelf), as well as in lakes (reservoirs), the main geochemical method is gas geochemical surveying in the near-bottom waters and bottom sediments in which, as […]
Hydrogasogeochemical survey Geochemical studies in oil and gas prospecting include anticipatory reconnaissance hydro-gas geochemical surveying at a scale of 1: 500,000-200,000. The hydro-gas and geochemical surveying of surface water ingresses are carried out in summer, less often in winter. The […]
Downhole Geochemistry The borehole geochemistry methods are conducted for a more rapid and in-depth study of borehole sections, forecasting, and evaluation of oil and gas saturation of potentially productive horizons, as well as studies of formation fluids. One of the […]
Geochemical methods, in comparison with traditional geological and geophysical studies, enable not only to forecast metallogenetic features of the sedimentary section on the structural-tectonic basis but also to rank the forecast sites on reserves and conduct a qualitative assessment of […]
It is carried out on a thermodynamic basis using PC “Selector-C” for solving a wide range of tasks, including: evaluation of different catagenesis degree types of DOM of potentially oil and gas horizons (OGH); identification of DOM oil-production potential in […]
Gas and geochemical surveys on snow cover are performed in oil and gas prospecting and environmental studies. The survey is carried out in winter (February-March) independently or as part of seismic surveys in seismic profiles. Snow sampling is performed on […]
The lithological, gas, and geochemical studies of near-surface sediments are performed independently or simultaneously with 2, 3D seismic prospecting in seismic profiles, mainly in winter at all stages of geological prospecting. The processing technology of geochemical works alongside seismic prospecting […]
The helium surveying is carried out on surface waters and near-surface deposits, in combination with gas and geochemical and hydro-geochemical works, as well as in studying the composition of water-dissolved and free gases of formation fluids of deep wells, with […]
Currently, the forecast and prospecting for oil and gas habitat are carried out based on a comprehensive study of geological, geochemical, and geophysical parameters of the sedimentary section, based on the interconnection and interdependence of geochemical and geophysical fields in […]
Downhole geochemistry technique Gas geochemical studies during engineering and survey works Gas geochemical studies as part of engineering and environmental surveys are carried out in areas where bulk soils are spread with an admixture of construction, industrial waste and household […]
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