Structure features of hydrocarbon traps in the areas with developed folding and overthrust tectonics in the territory of Surgutneftegas OJSC (Eastern Siberia)

UDK: 553.98.061.4
DOI: 10.24887/0028-2448-2018-1-23-25
Key words: common-depth-point shooting, Predpatomskiy fold-thrust belt, hydrocarbon traps
Authors: V.N. Kiper (SurgutNIPIneft, RF, Surgut)

Surgutneftegas OJSC systematically increases the volume of oil production at the fields in Eastern Siberia. The company's specialists study the structural conditions of the localization of hydrocarbon traps in areas with developed fold-thrust tectonics to replacement the mineral raw materials base and to increase the success of exploration drilling. The paper presents the results of studying the influence of fold-thrust dislocations on the formation and conservation of hydrocarbon deposits in the territory of Eastern Siberia. The study area is located within the boundaries of the Predpatomskiy fold-thrust belt and is limited by the territory of Surgutneftegas. The search for oil and gas in this region is due to the division of the sedimentary cover into the allochthonous and autochthonous parts. The main conclusions are made on the basis of the analysis of the latest 3D seismic data and prospecting wells within the Pilyudinskoye field. The integration of materials for geophysical studies of wells, cores and 3D seismic data allowed to construct an actual geological model of the field, which is much more complex than the earlier concept of the structure of the area. Based on a detailed study of the structure of the Pilyudinskiy field, the features of hydrocarbon traps have been established and described in the conditions of fold-thrust dislocations (the allochthonous part of the vertical section), which are widespread throughout the all territory of Predpatomskiy fold-thrust belt. Evidences of the productivity of the Cambrian oil and gas complex (the Belsky suite), a new exploration prospect, within the boundaries of the site are given. The obtained results and conclusions are applicable at the planning and design of geological exploration work within the boundaries of the Predpatomskiy fold-thrust belt. Further study of the features of the hydrocarbon traps in the allochthon and the improvement of the prospecting technique are necessary to improve the efficiency of prospecting and exploration.

References

1. Migurskiy A.V., Large scale lateral displacements of rocks and fluids on the Siberian Platform (In Russ.), Geologiya i mineral'no-syr'evye resursy Sibiri, 2010, no. 1, pp. 33–37.

2. Cooper M., Structural style and hydrocarbon prospectivity in fold and thrust belts: a global review, Deformation of the Continental crust. London. – 2007. – P. 447–472.

3. Gayduk V.V., Prokop'ev A.V., Metody izucheniya skladchato-nadvigovykh poyasov (Methods of fold-thrust belts studying), Novosibirsk: Nauka Publ., 1999, 160 p.

4. Migursky A.V., Efimov A.S., Staroseltsev V.S., New trends of petroleum exploration in Pre-Patom regional trough (Siberian platform) (In Russ.), Geologiya nefti i gaza = The journal Oil and Gas Geology, 2012, no. 1, pp. 19–27.

5. Gzovskiy M.V., Osnovy tektonofiziki (Fundamentals of tectonophysics), Moscow: Nauka Publ., 1975, 536 p.

6. Yaroshevskiy V., Tektonika razryvov i skladok (Tectonics of breaks and folds), Moscow: Nedra Publ., 1981, 245 p.

Surgutneftegas OJSC systematically increases the volume of oil production at the fields in Eastern Siberia. The company's specialists study the structural conditions of the localization of hydrocarbon traps in areas with developed fold-thrust tectonics to replacement the mineral raw materials base and to increase the success of exploration drilling. The paper presents the results of studying the influence of fold-thrust dislocations on the formation and conservation of hydrocarbon deposits in the territory of Eastern Siberia. The study area is located within the boundaries of the Predpatomskiy fold-thrust belt and is limited by the territory of Surgutneftegas. The search for oil and gas in this region is due to the division of the sedimentary cover into the allochthonous and autochthonous parts. The main conclusions are made on the basis of the analysis of the latest 3D seismic data and prospecting wells within the Pilyudinskoye field. The integration of materials for geophysical studies of wells, cores and 3D seismic data allowed to construct an actual geological model of the field, which is much more complex than the earlier concept of the structure of the area. Based on a detailed study of the structure of the Pilyudinskiy field, the features of hydrocarbon traps have been established and described in the conditions of fold-thrust dislocations (the allochthonous part of the vertical section), which are widespread throughout the all territory of Predpatomskiy fold-thrust belt. Evidences of the productivity of the Cambrian oil and gas complex (the Belsky suite), a new exploration prospect, within the boundaries of the site are given. The obtained results and conclusions are applicable at the planning and design of geological exploration work within the boundaries of the Predpatomskiy fold-thrust belt. Further study of the features of the hydrocarbon traps in the allochthon and the improvement of the prospecting technique are necessary to improve the efficiency of prospecting and exploration.

References

1. Migurskiy A.V., Large scale lateral displacements of rocks and fluids on the Siberian Platform (In Russ.), Geologiya i mineral'no-syr'evye resursy Sibiri, 2010, no. 1, pp. 33–37.

2. Cooper M., Structural style and hydrocarbon prospectivity in fold and thrust belts: a global review, Deformation of the Continental crust. London. – 2007. – P. 447–472.

3. Gayduk V.V., Prokop'ev A.V., Metody izucheniya skladchato-nadvigovykh poyasov (Methods of fold-thrust belts studying), Novosibirsk: Nauka Publ., 1999, 160 p.

4. Migursky A.V., Efimov A.S., Staroseltsev V.S., New trends of petroleum exploration in Pre-Patom regional trough (Siberian platform) (In Russ.), Geologiya nefti i gaza = The journal Oil and Gas Geology, 2012, no. 1, pp. 19–27.

5. Gzovskiy M.V., Osnovy tektonofiziki (Fundamentals of tectonophysics), Moscow: Nauka Publ., 1975, 536 p.

6. Yaroshevskiy V., Tektonika razryvov i skladok (Tectonics of breaks and folds), Moscow: Nedra Publ., 1981, 245 p.


Attention!
To buy the complete text of article (a format - PDF) or to read the material which is in open access only the authorized visitors of the website can. .

Mobile applications

Read our magazine on mobile devices

Загрузить в Google play

Press Releases

19.11.2020
09.11.2020
21.10.2020