The qualitative and quantitative assessment of ground waters protectability based on the regional specific charac-teristics of the lithology and thickness of impermeable deposits of the zone of aeration and overlying deposits, a ratio of confined and ground water levels, the soils and clay rocks absorptivity. The article gives the author's vision of ground waters natural protectability. It presents a quantitative estimation by three most well-known methods. Based on the calculations made a map of protectability of fresh ground waters in the Atlym-Novomikhailovsk complex for Nizhnevartovsk district was constructed.
The article presents a brief overview of the views on the stratification of the section of the neocomian deposits. As a basis for geological modeling, instead of formation units, seismic facies complexes were taken, including reservoirs in the coastal shallow-water zone, in a relatively deep-water zone - isochronous clinoform formations of the achimov strata. Within the researched territory, the characteristic of the established oil and gas potential of the complex is presented, on the basis of 3D seismic survey, perspective objects are identified, and their seismogeological characteristics are given.
The article discusses the goals, objectives, methods and types of geological and geophysical studies, as well as the forecast criteria for non-anticlinal oil and gas traps at the regional stage of exploration. Proposals are made to improve and systematize existing methods for predicting non-anticlinal traps. Geological and geophysical data on hydrocarbon deposits and exploration areas of Western Siberia are utilized. Comprehensive analysis of seismic data, well logs and core data is carried out using modern research methods.
ON MULTIVARIATE APPROACH TO EVALUATE THE PROTECTION OF AQUIFERS AT DEVELOPMENT OF WESTERN SIBERIA OIL-AND-GAS BEARING AREAS
