Lithofacies analysis of the Productive Series deposits  in the Bulla-Deniz oil and gas condensate field (Azerbaijan)

Lala Khalilova; Kifayet Kerimova

doi:10.24028/gj.v47i5.327141

Authors

Lala Khalilova Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Azerbaijan
Kifayet Alladin Kerimova Azerbaijan State Oil and Industry University, Baku, Azerbaijan, Azerbaijan

DOI:

https://doi.org/10.24028/gj.v47i5.327141

Keywords:

sequence stratigraphy, non-anticlinal trap, system tract, depositional environment, reservoir, horizon

Abstract

The study of the Bulla-Deniz Field by geological and geophysical methods began in the 1950-sand continues up today. Since the oil-and-gas bearing objects of the field have a complex geological setting at considerable depth, their penetration, sampling and development are one of the most important problems of today. Therefore, a detailed study of the geological structure of the field is very relevant.

The object of our investigation is the Bulla-Deniz Field, located in the north-western part of the Baku Archipelago. Exploration works revealed here oil-and-gas condensate bearing successions of V, VII and VIII horizons of the Productive Series. The objective of the study was to refine the geological structure and depositional conditions of these Productive Series horizons as well as to assess their reservoir properties based on well log data.

Sequence stratigraphy is an important method in geological and geophysical research. This method can be used to improve significantly the prediction of the studied fields, as well as to reveal unconventional reservoir types. The facies analysis, one of the stages of sequence stratigraphic analysis, is applied for studying the facies predictions from log data. Since the beginning of the oil production era, the main objects of hydrocarbon exploration have been medium and large anticlinal traps. These have been actively developed; as a result, their potential as primary exploration targets is being gradually exhausted. Therefore, the main exploration objects are non-anticlinal traps, low-amplitude uplifts, and stratigraphic wedges. The modern integrated approach allows tracing the conditions of the formation of sedimentary basins and improving the very understanding of sedimentation conditions.

We applied to the sequence stratigraphic analysis, the Emery method, and the cyclostratigraphic analysis to the study area. Sedimentation conditions were established and analysed, and lithofacies analysis was carried out. Hydrocarbon-rich reservoirs were found to be predominantly in the low sea-level tract and, slightly less frequently, in the transgressive system tract. In most cases, deposits formed during the aggradation and retrogradation periods have good reservoir properties.

References

Ahmadov, T.R., & Miriyeva, E.R. (2020). Clarification of the geological structure of lower Pliocene sediments in the Bulla-Deniz area and prediction of reservoir properties of layers using attribute analysis of seismic exploration data. Geophysical News in Azerbaijan, (3-4), 34—42 (in Azerbaijani).

Akhmedov, T., Khalilova, L., & Kerimova, K. (2024). Clarification of the genesis of deposits of Qala Suite of the Hovsan-Zykh area by methods of stratigraphic and lithofacies analysis based on 3D seismic and Well Logging data (Absheron oil and gas bearing region, Azerbaijan). Journal of Geology, Geography and Geoecology, 33(2), 222—233. https://doi.org/https://doi.org/10.15421/112420.

Belozerov, V.B. (2011). The role of sedimentation models in electrofacial analysis of terrigenous deposits. Geology of Oil and Gas, Bulletin of Tomsk Polytechnic University, 319(1), 116—123 (in Russian).

Catuneanu, O. (2017). Sequence stratigraphy. Guidelines for a standard methodology. Stratigraphy & Timescales, 2, 1—58. http://dx.doi.org/10.1016/bs.sats.2017.07.003.

Embry, A.F., & Johannessen, E.P. (2017). Two approaches to sequence stratigraphy. Stratigraphy &Timescales, 2, 85—118. http://dx.doi.org/10.1016/bs.sats.2017.08.001.

Ismayilov, F., Salmanov, A., Maharramov, B., & Shekarov, H. (2024). Oil and gas fields and promising structures of Azerbaijan (Caspian Sea aquatorium) (pp. 396—405). Baku: MSV LLC Publ.House (in Azerbaijani).

Kerimova, K.A., & Samadli, U.Y. (2024). Determination of petrophysical parameters of reservoirs in promising horizons and formations of the Bulla-Deniz field based on integrated well data (using Techlog software). Geophysical Journal, 46(4), 149—160. http://dx.doi.org/10.24028/gj.v46i4.310472.

Khalilova, L.N., & Kerimova, K.A. (2022). Facies analysis of productive series sediments on the base of well logging data (on the example of the Pirallahi adasy field). Oil Industry Journal, (1182), 14—18. http://dx.doi.org/10.24887/0028-2448-2022-4-14-18 (in Russian).

Maksimov, E.M. (2016). Oil and gas lithology. Identification of lithotypes based on well logging data (pp. 26—29). Tyumen: TIU (in Russian).

Mamedov, P.Z., Khalilova, L.N., & Mamedova, L.P. (2017). Study of lithofacies features of deposits of lower suites of productive thickness of the Northern tectonic line of the North-Absheron folded zone (NAFZ) by the method of sequence stratigraphy. Geophysical News in Azerbaijan, (3-4), 3—10 (in Russian).

Nasibova, G.J., Muxtarova, X.Z., Qanbarova, Sh.A., & Nasibova, S.N. (2024). The geological risk of changing the parameters of the reservoirs depending on the depth in a number of fields of the Baku archipelago. Reliability: Theory and Applications, 19(6), 390—398.

Pogorelova, E., & Abdulla-Zada, M. (2024). Oil and gas bearing complexes and litho-stratigraphic characteristics of pliocene deposits of the Bulla-deniz field.Visnyk of Taras Shevchenko National University of Kyiv. Geology, 4(107), 31—39. https://doi.org/10.17721/1728-2713.107.04.

Salmanov, A., Maharramov, B., Garagozov, E., & Karimov, N. (2023). Geology and indicators of development of oil and gas deposits in the onshore territory of Azerbaijan (pp. 459—468). Baku: MSV LLC Publ.House (in Azerbaijani).

Seidov, V.M., & Khalilova, L.N. (2023). Sequence stratigraphic analysis of the Galmaz field based on well logging data. Journal of Geology, Geography and Geoecology, 32(2), 360—370. https://doi.org/10.15421/112333.

Shekerov, H.I., & Abbasov, J.S. (2022). The study of reservoir parameters of subsurface rocks based on the core data of anticline belt of Sangachal-deniz—Bulla-deniz. Azerbaijan Oil Industry, 10, 4—9. https://doi.org/10.37474/0365-8554/2022-10-4-9(in Azerbaijani).

Shikhmammadova, T.N., & Yusubov, N.P. (2016). On some petrophysical characteristics of the lower section of the Productive Layer in the Sangachal-Deniz-Bulla-Deniz uplift zone. Azerbaijan Oil Industry, (3), 12—17.

Van Wagoner, J.C., Mitchum, R.M., Campion, K.M., & Rahmanian, V.D. (1990). Methods in exploration series. Siliciclastic Sequence stratigraphy in well logs. Cores, Amer. Assoc. Petrol. Geol. Tulsa, 7, 55 p.

Yusubov, N.P., & Guliev, I.S. (2015). The lithological-facies models of the Garadag, March 8, Sangachaly-Deniz, Duvani-Deniz, Bulla-Adasy and Bulla deniz fields, dated to the «interval break» according to GIS data. Azerbaijan Oil Industry, (5), 3—8.