ON THE ROLE OF POTENTIAL METHODS TO STUDY THE SALT AND REEF STRUCTURES IN THE DNIEPER-DONETS BASIN

P. Pіgulevskiy; L. Nikitash; A. Stovas

Authors

P. Pіgulevskiy Institute of Geophysics NAS of Ukraine Department of Seismic Hazards
L. Nikitash Limited Liability Company NADRA Integrated Solutions
A. Stovas Norwegian University of Science and Technology, Trondheim

Keywords:

Abstract

The article deals with some of the results of integrating geophysical methods applied in prospecting for unconventional hydrocarbon deposits under salt-stock bodies in the areas of concentration of small and low-amplitude anticlines and reef sites in the Dnieper-Donets basin (DDB). Analysis of potential methods shows that within the DDB there are three types of salt-diapirs, which have certain characteristics in gravimetric and magnetic fields. The first and most common characteristic is the intense minima in gravity and no reflection in the magnetic field. The less common second type is stocks that outline the minimum gravity against maximum in the magnetic field. The third one, having a peculiar nature, shows both gravimetric and magnetic positive anomalies. Such a variety of manifestations of stocks in the gravimetric and magnetic fields is due, primarily, to their complex morphology. The results of the geophysical surveys over the reef structures and the low-amplitude elevations formed over them show that they are mapped by linear, sometimes isometric, local maxima of the force of gravity of moderate intensity. The comparison of results of previously performed studies of gravimetric and magnetic fields shows their high geologic efficiency in studying the morphology of salt stocks and identifying prospective near-stock objects when combined with seismic data and the data from exploration drilling. Low-cost geophysical gravimetric and magnetic methods significantly reduce the cost of drilling deep exploration wells.

References

Vitvitsky O.V., (2001). Optimal extrapolation of structural boundaries in gravimetry [Optimalnaya ekstrapolyaciya granic v strukturnoj gravimetrii]. Problems in the theory and practice of geological interpretation of gravimetric, magnetic and electric fields : Proceedings of the 28th session of the International Seminar after D.G. Uspensky, Kyiv, January 29 – February 2, 2001. [Voprosy teorii I praktiki geologicheskoj interpretacii gravitacionnykh, magnitnykh i elektricheskich polej: Materialy 28-j Mezhdunarodnogo seminara im. D.G. Uspenskogo, Kiev, 29 yanvarya – 2 fevralya 2001]. M.: OIFZ RAN, 51-53 (in Russian).

Vysochansky I.V., (1991). New ideas on the development and prospects of oil and gas potential of salt dome uplifts in the Dnieper-Donets Basin [Novye predstavleniya o razvitii i perspektivakh neftegazonosnosti solyanokupolnykh podnyatij v Dneprovo-Donetskoj vpadine]. Geol. zhurn. – Geol. journal, 2, 109 -116 (in Russian).

Goshovsky S.V., Omelchenko V.V., Pіgulevskiy P.I., Shemet V.G., (2005). Role potential fields at oil and gas prospecting in Dneprovsko Donetskoy Depression [Rol potencialnykh poliv pry doslidzhennyakh na naftu ta gaz v Dneprovo-Donetskoj zapadyni]. Sbornik nauchnykh trudov po geoinformatike – Proceedings of the Geo-Informatics, 12, 57-62 (in Ukrainian).

Kobrunov A.I., (1993). Theory and methods of automated interpretation of gravimetric data for structurally complex media. Exploration Geophysics: Review of MGP "Geoinformark" [Teoriya i metody avtomatizirovannoj interpretacii gravimetricheskikh dannykh dlya slozhnopostroennnykh sred. Razvedochnaya geofizika: Obzor MGP "Geoinformark"], M., 51 (in Russian).

Kobrunov A.I, Petrovsky A.P., Aminov L.Z, Moiseenkova S.V, Shilova S.V., (2002). Monograph. The methodology and technology of evolutional comprehensive analysis of geological and geophysical data. Actual scientific and technical problems in geological and geophysical exploration for oil and gas in the Republic of Komi, Book 3 [Metodika i tekhnika evolyucionnogo kompleksnogo analiza geologo-geofizicheskoj informacii. Aktualnye nauchnotekhnicheskie problemy razvitiya geologo-geofizicheskikh i poiskovykh rabot na neft i gaz v Respublike Komi: monografiya, Kniga 3]. Ukhta: KRO RAEN – Ukhta: AOC Academy of Natural Sciences, 167 (in Russian).

Krivosheev V.T., Kukuruza V.D., Ivanova E.Z., Makagon V.V., (2013). Main directions for the accelerated discovery of oil and gas in Ukraine at the present stage. Oil-gas geophysics – unconventional resources: Proceedings of the scientific-practical conference, May 20-24, 2013 [Osnovnye napravleniya uskorennogo otkrytiya mestorozhdenij nefti i gaza v Ukraine na sovremennom etape. Neftegazovaya geofizika – netradicionnye resursy: Materialy dokladov nauchno-prakticheskoj konferentsii, 20-24 maya 2013]. Ivano-Frankovsk – Ivano-Frankivsk, 69-73 (in Russian).