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PHYSICS OF ROCKS AND PROCESSES
ArticleName Geomechanical modeling of poroperm properties in reservoirs within Sakhalin Shelf
DOI 10.17580/gzh.2019.12.04
ArticleAuthor Kerimov V. Yu., Zaitsev V. A., Mustaev R. N., Shakhverdiev A. Kh.
ArticleAuthorData

Sergo Ordzhonikidze Russian State Geological Prospecting Institute, Moscow, Russia:

V. Yu. Kerimov, Pro-Rector for Science, Professor, Doctor of Geologo-Mineralogical Sciences
R. N. Mustaev, Head of Department for Basic and Applied Research, Associate Professor, Candidate of Geologo-Mineralogical Sciences, mustaevrn@mgri-rggru.ru
A. Kh. Shakhverdiev, Professor, Doctor of Engineering Sciences

Lomonosov Moscow State University, Moscow, Russia:

V. A. Zaitsev, Associate Professor, Candidate of Geologo-Mineralogical Sciences

Abstract

The complex structure of the shelf in the Sea of Okhotsk, high geodynamic activity and the nonanticline traps present in the productive formations necessitate application of special technologies to studying secondary poroperm properties of the reservoirs. Prediction of locations and directions of open fractures is complicated by their small sizes. They are so small that fall beyond the detection range of many common tools such as well logging and seismic surveillance. Seismic detection of fracturing is impossible as a matter of principle; yet some logging tools of high resolving capacity can detect fractures under favorable conditions. When neither logging nor prospecting seismology can spot fractures, geomechanical modeling is often addresses as an efficient technique. Geomechanical modeling allows predicting effective porosity and permeability in the interwell space. As a result of the implemented studies, it is found that Sakhalin Shelf within the Kirin, Ayash and East Odoptu license areas experiences the modern shear stress with the sub-latitudinally oriented axis of maximum compression. The loading results in displacement along the existing discontinuities (faults), which generates a local stress field. The latter initiates new fractures or changes opening of the existing fractures which govern secondary porosity and permeability of rocks. 3D geomechanical modeling of this region made it possible to estimate permeability of each stratigraphical horizon. The revealed secondary permeability differs essentially in the upper and lower stratigraphical horizons, and the interface is the oktubai clayey rock unit. It is important that the contribution of the secondary permeability to the total (or effective) permeability is dissimilar in different stratigraphical units. The revealed secondary permeability essentially replenishes information on deliverability of reservoirs. The obtained data are applicable in hydrodynamic modeling.

keywords Sea of Okhotsk, geomechanical modeling, shelf, poroperm properties, fracturing, porosity, permeability.
References

1. Bogdanov N. A., Dobretsov N. L. The Okhotsk volcanic oceanic plateau. Russian Geology and Geophysics. 2002. Vol. 43, No. 2. pp. 101–114.
2. Verzhbitskii E. V., Solovev A. V. New data on the cenozoic deformations of the West Kamchatka Peninsula and their implications for the recent tectonics of the Eastern Sea of Okhotsk region. Oceanology. 2009. Vol. 49, No. 4. pp. 523–539.
3. Avdeiko G. P., Palueva A. A. The Kamchatka subduction zone: Seismotectonic regionalization and geodynamics. Journal of Volcanology and Seismology. 2011. Vol. 5, No. 1. pp. 1–16.
4. Zhi-Xin Guo, Yuan-Peng Shi, Yong-Tai Yang, Shuan-Qi Jiang, Lin-Bo Li, Zhi-Gang Zhao. Inversion of the Erlian Basin (NE China) in the early Late Cretaceous: Implications for the collision of the Okhotomorsk Block with East Asia. Journal of Asian Earth Sciences. 2018. Vol. 154. pp. 49–66.
5. Kerimov V. Yu., Leonov M. G., Osipov A. V., Mustaev R. N., Khai Vu Nam. Hydrocarbons in the Basement of the South China Sea (Vietnam) Shelf and Structural–Tectonic Model of their Formation. Geotectonics. 2019. Vol. 53, Iss. 1. pp. 42–59.
6. Golozubov V. V., Kasatkin S. A., Grannik V. M., Nechayuk A. E. Deformation of the Upper Cretaceous and Cenozoic complexes of the West Sakhalin terrane. Geotectonics. 2012. Vol. 46, Iss. 5. pp. 333–351.
7. Raznitsin Yu. N. Geodynamics of ophiolites and formation of hydrocarbon fields on the shelf of eastern Sakhalin. Geotectonics. 2012. Vol. 46, Iss. 1. pp. 1–15.
8. Obzhirov A. I. Seismotectonic origin of earth degassing, surface gas emission from subsoil and its participating in geological processes in the sea of Okhotsk. Aktualnye problemy nefti i gaza. 2018. No. 4(23). DOI: 10.29222/ipng.2078-5712.2018-23.art41
9. Kerimov V. Yu., Gordadze G. N., Mustaev R. N., Bondarev A. V. Formation Conditions of Hydrocarbon Systems on the Sakhalin Shelf of the Sea of Okhotsk Based on the Geochemical Studies and Modeling. Oriental Journal of Chemistry. 2018. Vol. 34, No. 2. pp. 934–947.
10. Hai W. N., Kerimov V. Yu., Leonova E. A., Mustaev R. N. Generation and Conditions Formation of Hydrocarbon Dep osits in Kyulong Basin by Simulation Results Hydrocarbon Systems. Geomodel 2015 : Proceedings of the 17th science and applied research conference on oil and gas geological exploration and development. Gelendzhik, 2015. DOI: 10.3997/2214-4609.201413931
11. Veselov O. V., Semakin V. P., Kochergin A. V. Heat flow and neotectonics of the Deryugin Basin’ region (Okhotsk Sea). Geosistemy perekhodnykh zon. 2018. Vol. 2, No. 4. pp. 312–322.
12. Zhi-Xin Guo, Yong-Tai Yang, Zyabrev S., Zhen-Hui Hou. Tectonostratigraphic evolution of the Mohe-Upper Amur Basin reflects thefinal closure of the Mongol-Okhotsk Ocean in the latest Jurassic–earliest Cretaceous. Journal of Asian Earth Sciences. 2017. Vol. 145. pp. 494–511.
13. Rodnikov A. G., Zabarinskaya L. P., Sergeeva N. A. Deep structure of the Earth’s seismic regions (Sakhalin Island). Vestnik Otdeleniya nauk o Zemle RAN. 2014. Vol. 6. DOI: 10.2205/2014NZ000121
14. Aleksandrov I. A., Stepnova Yu. A., Ivin V. V., Golozubov V. V., Jahn B.-M., Liao C.-P. Eocene Age of Granitoids of Okhotsk Granodiorite Complex (Southern Sakhalin). Doklady Akademii nauk. 2018. Vol. 483, No. 5. pp. 524–528.
15. Senachin V. N., Veselov O. V., Semakin V. P., Kochergin E. V. Digital model of the earth’s crust of the Okhotsk sea region. Geoinformatika. 2013. No. 4. pp. 33–44.
16. Feng-Qi Zhang, Yildirim Dilek, Han-Lin Chen, Shu-Feng Yang, Qi-An Meng. Structural architecture and stratigraphic record of Late Mesozoic sedimentary basins in NE China: Tectonic archives of the Late Cretaceous continental margin evolution in East Asia. Earth-Science Reviews. 2017. Vol. 171. pp. 598–620.

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