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Abstract

Summary

The modern approach to prospecting and exploration of gas and oil traps within the northern side of the Dnieper-Donetsk depression is considered. The results of volumetric seismic surveys performed in this region indicate a decrease in the efficiency of traditional technologies for predicting hydrocarbon traps, which are based on the analysis of structural and tectonic models. In some cases, the use of only the structural factor does not give positive results. This is due in part to the absence of major structural traps. Accordingly the development of such deposits may not achieve the desired profitability. The scheme of location of geological bodies and structures promising for the presence of hydrocarbons is given, from which the next results follow. A significant part of the structures that are conventionally considered promising are characterized by a low probability of hydrocarbons. The practice of drilling wells on such structures confirms this conclusion. It is concluded that the increase in the efficiency of prospecting, exploration and development of gas and oil deposits in this region is related to the use of direct indicators of hydrocarbons. The efficiency of application of different sets of seismic attributes is analyzed. The most appropriate way to interactively analyze the volume distributions of seismic attribute values has been defined. Examples of detection of hydrocarbon traps and determination of their physical properties, which are confirmed by drilling wells, are given. Keywords: seismic image, seismic inversion, multi-attribute classification, direct hydrocarbon indicators.

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/content/papers/10.3997/2214-4609.202056007
2020-11-10
2024-03-29
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