Distribution characteristics of abnormal formation pressures in the aquatic area of the Sakhalin shelf
https://doi.org/10.32454/0016-7762-2022-64-5-41-53
Abstract
Introduction. The conditions determining the distribution of abnormal formation pressures in the aquatic area of the Sakhalin shelf are analysed using boring data.
Aim. To analyse the genesis of abnormally high pore pressure (AHPP) or abnormally high formation pressure (AHFP) zones and identify the pore pressure heterogeneities of the Sakhalin shelf.
Materials and methods. Data systematization and statistical generalization, partial borrowing of materials from field data, reference literature and published materials. Modelling of the AHPP (AHFP) formation process was performed using the PetroMod software (Schlumberger).
Results. The study revealed the isolated AHPP zones of the Sakhalin shelf, related to the syngenetic AHPPs and typically encountered in facies that develop downward the regional dip and consist of deltaic sediments, formed subsequently in the environments of internal neritic (subsaline-aqueous and offshore-marine sediments) and middle neritic (shallow marine sediments) zones, i.e., in places with the large mass accumulation rate. From this position, the AHPPs (AHFPs) in the Paleo-Amur deltaic sediments of the Sakhalin shelf were studied. Various procedures and direct borehole measurements proved the sectional presence of AHPP (AHFP) zones. Within the limits of the Sakhalin shelf, an increase in the formation pressure is recorded in several boreholes, i.e., zones of abnormally high formation pressure (AHFP) are revealed. The process of forming AHPP (AHFP) should be modelled based on the knowledge about the compaction processes of rocks, as well as their initial, final and normal porosity, density and pressure.
About the Author
A. K. Shatyrov
Sergo Ordzhonikidze Russian State University for Geological Prospecting
Russian Federation
Russian Federation
Anar K. Shatyrov — engineer of the Laboratory “Modeling of Hydrocarbon Systems”
23, Miklukho-Maklaya str., Moscow 117997
+7 (926) 142-77-63
References
1. Aleksandrov B.L., Shilov G.Ya., Skripka A.A. Estimation of AVPOD in the conditions of intraformational erosion of the section at the Messoyakha group of hydrocarbon deposits // Proceedings of the Russian State University of Oil and Gas. I.M. Gubkina. 2010. No. 3(260). P. 23—33.
2. Andreev A.A., Vorobyov V.M. On the tectonics of the Sea of Okhotsk region in the light of geomagnetic data // Pacific Geology. 1991. No. 1. P. 27—33.
3. Anikiev K.A. Abnormally high formation pressures in oil and gas fields. Leningrad: Nedra, 1964. 168 p.
4. Bondarev A.V., Kerimov V.Yu., Sizikov E.A., Sinyavskaya O.S. Conditions for the formation of oil and gas traps in the Paleogene-Neogene complex of the Sakhalin shelf // Oil, gas and business. 2016. No. 2. P. 50—54.
5. Verzhbitsky E.V., Kononov M.V. Geodynamic evolution of the lithosphere of the Sea of Okhotsk region according to geophysical data // Physics of the Earth. 2006. No. 6. P. 47—59.
6. Dzyublo A.D., Shnip O.A., Khalimov K.E. Geological structure and oil and gas content of the Kirinsky block of the shelf Sakhalin // Oil, gas and business. 2013. No. 3. P. 26—32.
7. Kerimov V.Yu., Bondarev A.V., Sizikov E.A., Sinyavskaya O.S., Makarova A.Yu. Conditions for the Formation and Evolution of Hydrocarbon Systems on the Sakhalin Shelf of the Sea of Okhotsk Oil industry. 2015. No. 8. P. 22—27.
8. Kerimov V.Yu., Rachinsky M.Z. Geofluid dynamics of oil and gas potential of mobile belts. M.: Nedra, 2011. 598 p.
9. Kerimov V.Yu., Sizikov E.A., Sinyavskaya O.S., Makarova A.Yu. Conditions for the formation and search for hydrocarbon deposits in turbidite reservoirs of the Sea of Okhotsk // Oil, gas and business. 2015. No. 2. P. 32—37.
10. Kerimov V.Yu., Shilov G.Ya., Serikova U.S. Geological risks in prospecting and exploration of oil and gas fields and ways to reduce them // Oil, gas and business. 2014. No. 8. P. 44—52.
11. Kerimov V.Yu., Shilov G.Ya., Serikova U.S. Strategy and tactics for the development of hydrocarbon resources on the shelf of the Russian Federation // Oil, gas and business. 2014. No. 7. P. 28—34.
12. Margulis L.S. Oil and gas prospective formations of the Cenozoic of South Sakhalin // Sedimentary formations of the oil and gas bearing regions of the Far East. Vladivostok: DVNTs of the USSR Academy of Sciences, 1975. P. 31—52.
13. Martynov V.G., Kerimov V.Yu., Shilov G.Ya., Rachinsky M.Z. Geofluid pressures and their role in prospecting and exploration of oil and gas fields. Moscow: Infra-M, 2013. 347 p.
14. Mudretsov V.B., Zhiltsov A.M. Anomalous seismoacoustic zones on the northeastern shelf of about. Sakhalin // Pacific Geology. 1990. No. 3. P. 108— 112.
15. Shilov G.Ya. Geological aspects of estimating pore pressures in well sections from geophysical data. Moscow: LLC “Gazpromexpo“, 2010. 126 p.
16. Shilov G.Ya. Jafarov I.S. Genetic models of sedimentary and volcanogenic rocks and the technology of their facial interpretation based on geological and geophysical data. M.: Information Center of VNIIgeosystems, 2001. 394 p.
Review
For citations:
Shatyrov A.K. Distribution characteristics of abnormal formation pressures in the aquatic area of the Sakhalin shelf. Proceedings of higher educational establishments. Geology and Exploration. 2022;(5):41-53. (In Russ.) https://doi.org/10.32454/0016-7762-2022-64-5-41-53
Views:
700
Email this article 