Regularities of the distribution of petrophysical parameters of productive series sediments and classification of non-anticlinal traps on the Qala-Tyurkan area (Azerbaijan)

UDK: 553.98
DOI: 10.24887/0028-2448-2021-2-36-39
Key words: lithological trap, stratigraphic trap, tectonically screened trap, non-anticlinal trap, seismic data, petrophysics
Authors: M.A. Huseynova (Oil and Gas Research and Design Institute, SOCAR, the Republic of Azerbaijan, Baku)

The distribution of petrophysical parameters (porosity, grittiness, permeability, shaliness) measured in rock samples from well logs drilled in the Qala-Turkan area was not reflected on the maps compiled as a result of statistical analysis. Therefore, to clarify the existence of lithological non-anticline traps, the following questions were considered. As can be seen from the maps, the sufficiently high grittiness and permeability in the north-west part of the fold suggest that the reservoirs have high oil and gas content and favorable conditions for the accumulation of hydrocarbons in the QaLD horizon of the investigated areas. Predictive estimates of petrophysical parameters (effective porosity, sandy, effective thickness and permeability ratios) in arches, periclinal and wings of the northwestern part of QaLD were analyzed by depth and area variability for the study, investigation, analysis, classification, appearance and perspective of lithological, stratigraphic, and tectonic screened non-structural traps on QaLD of the Qala-Turkan area. In addition, the classification and detection of non-anticlinical traps as a result of geological sections in this area were analyzed. Petrophysical parameters analysis on geological profiles was conducted to identify non-anticlinal traps in the Qala-Turkan area, and the increase of the values of these parameters from the north-west to the structure pericline is determined (in lithological pinchout and tectonic screened sections). The sharp changes of the observed petrophysical parameters indicate that the rocks within the trap can be oil and gas reservoirs.

References

1. Aleskerov Dzh.A., Determination of the time of occurrence of neotectonic movements and their role on the migration of hydrocarbons and the formation of oil and gas fields (on the example of oil and gas fields in Western Absheron) (In Russ.), Azerbaydzhanskoe neftyanoe khozyaystvo, 2007, no. 6, pp. 25–30.

2. Aliev A.I., Bagirzade F.M., Buniyatzade Z.A. et al., Mestorozhdeniya nefti i gaza i perspektivnye struktury Azerbaydzhanskoy SSR (Oil and gas fields and promising structures of the Azerbaijan SSR), Baku: Elm Publ., 1985, 108 p.

3. Aliev G.R., Miotsenovye otlozheniya Apsheronskogo polustrova i perspektivy poiskov v nikh neftegazovykh zalezhey (Miocene sediments of the Absheron Peninsula and prospects for prospecting for oil and gas deposits in them), Collected papers “Problemy neftegazonosnosti Kavkaza” (Problems of oil and gas potential of the Caucasus), Moscow: Nauka Publ., 1988, pp. 75–80.

4. Alizade A.A., Akhmedov G.A., Akhmedov A.M. et al., Geologiya neftyanykh i gazovykh mestorozhdeniy Azerbaydzhana (Geology of Azerbaijan's oil and gas fields), Moscow: Nedra Publ., 1966, 384 p.

5. Guseynova M.A., Non-anticlinal types of traps and their distribution pattern in the Sulu-Tepe field (In Russ.), Azerbaydzhanskoe neftyanoe khozyaystvo, 2016, no. 2–3, pp. 59–66.

6. Ganbarov Ya.Kh., Ibragimli M.S., Classification of non-anticlinal types of traps found in the Yevlakh-Agjabedi depressions (In Russ.), azerbaydzhanskoe neftyanoe khozyaystvo, 2007, no. 8, pp. 1–4.

7. Babazade B.K., Klassifikatsiya zalezhey i mestorozhdeniy nefti i gaza Azerbaydzhana i ratsional'naya metodika ikh razrabotki (Classification of deposits and oil and gas fields in Azerbaijan and rational methodology for their development), Moscow: Nedra Publ., 1964, pp. 102–105.

The distribution of petrophysical parameters (porosity, grittiness, permeability, shaliness) measured in rock samples from well logs drilled in the Qala-Turkan area was not reflected on the maps compiled as a result of statistical analysis. Therefore, to clarify the existence of lithological non-anticline traps, the following questions were considered. As can be seen from the maps, the sufficiently high grittiness and permeability in the north-west part of the fold suggest that the reservoirs have high oil and gas content and favorable conditions for the accumulation of hydrocarbons in the QaLD horizon of the investigated areas. Predictive estimates of petrophysical parameters (effective porosity, sandy, effective thickness and permeability ratios) in arches, periclinal and wings of the northwestern part of QaLD were analyzed by depth and area variability for the study, investigation, analysis, classification, appearance and perspective of lithological, stratigraphic, and tectonic screened non-structural traps on QaLD of the Qala-Turkan area. In addition, the classification and detection of non-anticlinical traps as a result of geological sections in this area were analyzed. Petrophysical parameters analysis on geological profiles was conducted to identify non-anticlinal traps in the Qala-Turkan area, and the increase of the values of these parameters from the north-west to the structure pericline is determined (in lithological pinchout and tectonic screened sections). The sharp changes of the observed petrophysical parameters indicate that the rocks within the trap can be oil and gas reservoirs.

References

1. Aleskerov Dzh.A., Determination of the time of occurrence of neotectonic movements and their role on the migration of hydrocarbons and the formation of oil and gas fields (on the example of oil and gas fields in Western Absheron) (In Russ.), Azerbaydzhanskoe neftyanoe khozyaystvo, 2007, no. 6, pp. 25–30.

2. Aliev A.I., Bagirzade F.M., Buniyatzade Z.A. et al., Mestorozhdeniya nefti i gaza i perspektivnye struktury Azerbaydzhanskoy SSR (Oil and gas fields and promising structures of the Azerbaijan SSR), Baku: Elm Publ., 1985, 108 p.

3. Aliev G.R., Miotsenovye otlozheniya Apsheronskogo polustrova i perspektivy poiskov v nikh neftegazovykh zalezhey (Miocene sediments of the Absheron Peninsula and prospects for prospecting for oil and gas deposits in them), Collected papers “Problemy neftegazonosnosti Kavkaza” (Problems of oil and gas potential of the Caucasus), Moscow: Nauka Publ., 1988, pp. 75–80.

4. Alizade A.A., Akhmedov G.A., Akhmedov A.M. et al., Geologiya neftyanykh i gazovykh mestorozhdeniy Azerbaydzhana (Geology of Azerbaijan's oil and gas fields), Moscow: Nedra Publ., 1966, 384 p.

5. Guseynova M.A., Non-anticlinal types of traps and their distribution pattern in the Sulu-Tepe field (In Russ.), Azerbaydzhanskoe neftyanoe khozyaystvo, 2016, no. 2–3, pp. 59–66.

6. Ganbarov Ya.Kh., Ibragimli M.S., Classification of non-anticlinal types of traps found in the Yevlakh-Agjabedi depressions (In Russ.), azerbaydzhanskoe neftyanoe khozyaystvo, 2007, no. 8, pp. 1–4.

7. Babazade B.K., Klassifikatsiya zalezhey i mestorozhdeniy nefti i gaza Azerbaydzhana i ratsional'naya metodika ikh razrabotki (Classification of deposits and oil and gas fields in Azerbaijan and rational methodology for their development), Moscow: Nedra Publ., 1964, pp. 102–105.



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