DETERMINATION OF POROSITY AND GAS SATURATION FACTOR OF RESERVOIRS IN ACCORDANCE WITH PT-CONDITIONS OF OCCURRENCE
DOI:
https://doi.org/10.17721/1728-2713.69.09.59-63Keywords:
gas reservoir, complex of neutron logging and density logging, porosity and weight factors of averaging, gas saturation factor and proportionality factor, thermobarometric conditionsAbstract
The porosity of the gas reservoir can be determined using a complex of radioactivity logging (RL) as the weighted arithmetic average of the apparent porosities from density log (DL) and neutron-neutron log (NNL). It is shown that the weight factors of averaging depend on the thermobarometric conditions of beds occurrence (primarily from the formation pressure). Weight factors depend on the density and the hydrogen index of gas, and also depend on lithologycal properties. A method for determination of gas saturation factor is proposed. Gas saturation factor is proportional to the ratio of the difference between apparent porosities of DL and NNL to the true porosity of the RL, with proportionality factor calculated similarly to weight factors of averaging. The parameters under investigation were estimated depending on the temperature and pressure conditions of beds occurrence to a depth of 8 km. Examples of the effect of abnormally high formation pressures for gas deposits of the Dnieper-Donets Depression are given. The effectiveness and informativeness of the developed approaches are demonstrated on an example of methanecoal cased well (Donets basin). Formation lithology is estimated, gas-saturated reservoirs are resolved, true porosity and gas saturation factor of reservoirs are determined.
References
Анциферов А.В., Голубев А.А., Канин В.А. и др., (2010). Газоносность и ресурсы метана угольных бассейнов Украины: Монография в 3 т. – Донецк: Вебер. Antsiferov A.V., Golubev A.A., Kanin V.A. et al., (2010). Gas-bearing capacity and methane resources of coal basins of Ukraine [Gazonosnost i resursy metana ugolnykh basseynov Ukrainy]. Monograph in 3 vols. – Donetsk, Veber Publ. (In Russian).
Гиматудинов Ш.К., (1971). Физика нефтяного и газового пласта. – М.: Недра. – 312 с. Gimatudinov Sh.K., (1971). Physics of oil and gas reservoir [Fizika neftyanogo i gazovogo plasta]. – Moscow, Nedra Publ. – 312 p. (In Russian).
Интерпретация результатов геофизических исследований нефтяных и газовых скважин: Справочник. Под ред. В.М. Добрынина, (1988). – М.: Недра. – 476 с. Interpretation of results of logging of oil and gas wells [Interpretatsiya rezultatov geofizicheskikh issledovaniy neftyanykh i gazovukh skvazhin]. Handbook. Edited by V.M. Dobrynin, (1988). – Moscow, Nedra Publ. 476 p. (In Russian).
Лукин А.Е., (2014). Углеводородный потенциал больших глубин и перспективы его освоения в Украине. – Геофизический журнал, 36, 4. – С. 3–21. Lukin A.E., (2014). Hydrocarbon potential of large depths and the prospects of its development in Ukraine [Uglevodorodnyy potentsial bolshikh glubin i perspektivy ego osvoeniya v Ukraine]. Geophysical journal – Geofizicheskiy zhurnal, 36(4). – Р. 3-21. (In Russian).
Мелик-Пашаев В.С., Халимов Э.М., Серегина В.Н., (1983). Аномально высокие пластовые давления на нефтяных и газовых месторождениях. – М.: Недра. – 181 с.
Melik-Pashaev V.S., Khalimov E.M., Seregina V.N., (1983). Abnormal formation pressures in oil and gas deposits [Anomalno vysokie plastovye davleniya na neftyanykh i gazovykh mestorozhdeniyakh]. – Moscow, Nedra Publ. – 181 p. (In Russian).
Пат. на винахід 106560 Україна. Спосіб визначення параметрів газоносних колекторів / Кулик В.В., Бондаренко М.С., Кривонос О.М.; заявник і патентовласник ІГФ НАНУ, (2014). № а201308901; заявл. 16.07.13.; опубл. 10.09.14. Бюл. № 17. Kulyk V.V., Bondarenko M.S., Kryvonos O.M., (2014). Method of determination of gas-bearing reservoirs parameters [Sposib vyznachennya parametriv gazonosnykh kolektoriv]. Patent UA, no. 106560. (In Ukrainian).
Петренко В.И., Хорошилова Л.В., Саитов Р.Ф., (2004). Термобарические параметры залежей углеводородов и их влияние на газофазный массоперенос. Сб. науч. трудов Сев.-Кавк. гос. техн. ун-та. Серия "Естествознание", 1, 7. Petrenko V.I. Khoroshilova L.V., Saitov R.F., (2004). Thermobaric parameters of hydrocarbon deposits and their effect on the gas-phase mass transfer [Termobaricheskie parametry zalezhey uglevodorodov i ikh vliyanie na gazofaznyy masso-perenos]. Proc. of the North Caucasus State Technical University. A series of "Natural science" – Sbornik nauchnykh trudov Severo-Kavkazskogo gosudarstvennogo tekhnicheskogo universiteta. Seriya "Estestvoznanie", 1(7). (In Russian).
Современное состояние исследований газа центральнобассейнового типа в Днепровско-Донецкой впадине / Кабышев Ю., Вакарчук С., Стрыжак В. и др., (2011). – Геолог Украины, 2. – С. 120–124. Kabyshev Yu., Vakarchuk S., Stryzhak V. et al., (2011). The current state of research of basin-center gas in the Dnieper-Donets depression [Sovremennoe sostoyanie issledovaniy gaza тsentralnobasseynovogo tipa v Dneprovsko-Donetskoy vpadine]. Geologist of Ukraine – Geolog Ukrainy, 2. – Р. 120-124. (In Russian).
Фенин Г.И., (2010). Аномальные пластовые давления в зонах углеводородонакопления нефтегазоносных бассейнов. Нефтегазовая геология. Теория и практика, 5, 4. Fenin G.I., (2010). Abnormal formation pressures in zones of hydrocarbon accumulation of oil and gas basins [Anomalnye plastovye davleniya v zonakh uglevodorodonakopleniya neftegazonosnykh basseynov]. Oil and gas geology. Theory and practice. – Neftegazovaya geologiya. Teoriya i praktika, 5(4). (In Russian).
Alger R.P., Dewal J.T., (1969). Сombined sidewall neutron porosity gamma-gamma tool. Patent US, no. 3453433.
DasGupta U., (1997). Method for determining porosity in an invaded gas reservoir. Patent US, no. 5684299.
Gas Reservoir. Encyclopedia Britannica. Available at: www.britannica.com/EBchecked/topic/226468/gas-reservoir.
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