The hydrodynamic conditions of the Volyn-Podillya oil and gas-bearing region
DOI:
https://doi.org/10.26565/2410-7360-2018-49-03Keywords:
hydrodynamic conditions, oil and gas-bearing region, formation pressure, hydrostatic coefficient, gas depositAbstract
The purpose of the paper was to study hydrodynamic peculiarities of the aquifers of Volyn-Podillya oil and gas-bearing region and their impact on the formation and conservation of gas deposits.
The research area is located in the western Ukraine and covers the structures of the Eastern European and the Western European platforms. At present, Lokachi and Velyki Mosty gas fields are discovered here in the deposits of the Middle and Upper Devonian. Non-commercial volumes of gas and oil were received in some exploration wells.
Research methodology was based on the evaluation of water initial formation pressures and static levels that were obtained from the funds of the State Enterprise "Lvivgazvydobuvannia" and State Enterprise "Zakhidukrgeologia”. The formation pressures were transformed to one plane of comparison. Also the hydrodynamic characteristics were studied in this work on the basis of the hydrostatic coefficient (P f/P e) in order to evaluate the impact of the factors that determine the nature and form the state of the hydrodynamic field. The maps of the formation pressures and hydrostatic coefficients were constructed and interpreted.
Results of researches. It was found out that the parameters of hydrodynamic fields of the Upper Proterozoic, Cambrian, and Lower-Devonian aquifers complexes of the Volyn-Podillya ORG have the features of an exfiltration system. The hydrodynamic tension extends from the most abyssal parts of the sedimentary basin to its peripheral parts. Formation pressures are caused by an increase in the volume of waters due to their squeezing out of clay sediments that have the ability to significant compression into weakly compression sandy rocks.
The hydrodynamic energy of the Middle-Upper Devonian aquifer complex is directed from the periphery to its central (the most submerged) part. The peripheral parts have the characteristics of the infiltration water-pressure system.
It was established that the hydrodynamic field of the Volyn-Podillya ORG compared with the Bilche-Volytsya ORG is marked by a much lower power due to weak effect of exfiltration in the aquifers and the absence of sustained lithological and tectonic screens.
The lateral hydrodynamic field, investigated on the basis of the hydrostatic coefficient, increases from the south to the north. A certain spatial relationship of the isolines of hydrostatic coefficient with diagonal disjunctive breaks is observed. This can determine them as a way of the water-hydrocarbon mixtures migration.
Gas deposits of Lokachy and Velyki Mosty fields are located in areas with higher values of the hydrostatic coefficient. Distribution of the hydrostatic coefficient in the section of Lokachi gas field indicates the connection of its overhydrostatic values with the existing gas deposits.
Hydrodynamic isolation of the structures promoted conservation of hydrocarbon deposits from mechanical and biochemical destruction.References
Tkhostov, B. (1966). Nachal'nyye plastovyye davleniya i geogidrodinamicheskiye sistemy [Initial reservoir pressure and geohydrodynamic systems]. Moscow, Nedra, 268.
Alijev, A. (1953). O plastovykh davleniyakh v nedrakh neftyanykh mestorozhdeniy [About reservoir pressures in the depths of oil fields]. Baku, Aznefteizdat. 177.
Kolodij V. (1981). Sverhgidrostaticheskie plastovye davlenija i neftegazonosnost' [Superhydrostatic reservoir pressure and oil and gas-bearing]. Soviet geology, 6, 21–30.
Durmish'jan A. (1973). O singeneticheskoj і epigeneticheskoj prirode anomal'no visokih plastovih davlenij (AVPD) v nedrah [About the syngenetic and epigenetic nature of abnormally high reservoir pressures in the interior]. Oil and Gas Geology and Geophysics, 3, 50–53.
Du, X., Xie, X., Lu, Y., Zhang L., Zhang Ch. (2010). Hydrogeochemistry of formation water in relation to overpressures and fluid flow in the Qikou Depression of the Bohai bay basin. Journal of Geochemical Exploration, 106, 1–3, 77–83.
Yang, R., He, Sh., Li, T., Yang, X., Hu, Q. (2016): Origin of over-pressure in clastic rocks in Yuanba area, northeast Sichuan Basin, China. Journal of Natural Gas Science and Engineering, 30, 90–105.
Chilingar, G., Robertson, J., Riekelli, Jr. (2002). Origin of abnormal formation pressures. Chapter 2. Developments in Petroleum Science, 50, 21–67.
Levorsen, A. I. (1956). Geology of petroleum. W. H. Freeman and Company, San Francisco, 300.
Shestopalov, V. M. (2014). O hydrodynamycheskoj zonalʹnosty y vodoobmene v hydroheolohycheskykh strukturakh [Hydrodynamic zones and water exchange in the hydrogeological structures]. Geological journal, 4 (349), 9–26.
Google Earth Pro / Data SIO, NOAA, U.S. Navy, NGA, GEBCO.
Ivanyuta, M. M. ed. (1998). Atlas rodovy`shh nafty i gazu Ukrayiny u 6 t. [Atlas of oil and gas fields of Ukraine in six volumes]. Vol. 4. Lviv: Ukrainian Oil and Gas Academy, 328.
Venglinskij G. I. (1974). Dinamika i khimizm podzemnykh vod Volyno-Podol'skoy plity v svyazi s neftegazonosnostyu [Dynamics and chemistry of underground waters of the Volyn-Podillya Plate in connection with oil and gas-bearing]. Institute of Geology and Geochemistry of Combustible Minerals, of AS of Ukr.SSR, 27.
Kolodij Volodymyr, Bala Stepan (2001). Hidroheolohichni umovy proterozojs"ko-paleozojs"kyx vidkladiv Volyno-Podil"s"koyi naftohazonosnoyi oblasti [Hydrogeological conditions of the Proterozoic-Paleozoic deposits of Volyn-Podillya oil and gas area] // Abstracts of reports of international science Conference "Geology of Combustible Minerals of Ukraine". - Lviv, 113–115.
Halyna Medvid", Mariya Kost", Ol"ha Telehuz, Roman Pan"kiv, Olena Pal"chykova, Orysya Majkut, Iryna Saxnyuk (2017). Heoximichni osoblyvosti vodonosnyx kompleksiv Velykomostivs"koho hazovoho rodovyshha (Volyno-Podillya) [Geochemical peculiarities of the aquifer complex of the Velyki Mosty gas field]. Geology and Geochemistry of Combustible Minerals, 3–4 (61), 76–86.
Silin-Bekchurin, A. (1949). Metod priblizhennogo rascheta skorostey fil'tratsii i podzemnogo stoka rassolov po pyezometram. [Method of approximate calculation of filtration rates and underground runoff of brines by piezometers]. Proceedings of the Laboratory of Hydrogeological Problems, Moscow, 2, 158–183.
Krups"kyj, Yu. (2001). Heodynamichni umovy formuvannya i naftohazonosnosti Karpats"koho ta Volyno-Podil"s"koho rehioniv Ukrayiny [Geodynamic conditions of formation and oil and gas-bearing of the Carpathian and Volyn-Podillya regions of Ukraine]. UkrDGRI, Kyiv, 144.
Harasymchuk, V. & Kolodij, V. (2003). Heotermal"ni umovyny osadovoyi tovshhi pivdenno-sxidnoyi chastyny Peredkarpats"koyi naftohazonosnoyi oblasti (Geotermobar conditions of the sedimentary layer of the south-eastern part of the Carpathian oil and gas-bearing area). Geology and Geochemistry of Combustible Minerals, 2, 7–18.
Harasymchuk, V., Kolodij, V., Kulynych O. (2004). Heneza vysokokoncentrovanyx solyanok pid nasuvnyx vidkladiv pivdenno-sxidnoyi chastyny Zovnishn"oyi zony Peredkarpats"koho prohtnu [Genesis of high-concentrated brines of the South-Eastern part of the Outer Zone of the Carpathian deep]. Geology and Geochemistry of Combustible Minerals, 4, 105–119.
Dryhant D. (2010). Devons"ki konodonty pivdenno-zaxidnoyi okrayiny Sxidnoyevropejs"koyi platformy (Volyno-Podillya, Ukrayina) [Devonian conodonts of the south-western edge of the Eastern European Platform (Volyn-Podillya, Ukraine)). Kyiv, Akademperiodyka, 156.
Honyk, I., Havrylko, H., Honyk, O. (2012). Perspektyvy poshukiv vuhlevodniv v devons"kyx vidkladax Volyno-Podillya za rezul"tatamy zonal"noho prohnozu [Prospects for finding hydrocarbons in the Devonian sediments of Volyn Podillya on the basis of the zonal forecast]. Geology and Geochemistry of Combustible Minerals, 1–2, 18–26.
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Copyright (c) 2018 Vasyl Yuriiovych Harasymchuk, Halyna Bohdanivna Medvid, Olga Volodymyrivna Teleguz, Mariia Viktorivna Kost’
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