Application of new calorimetric methods for reservoir fluid al systems study

Valery M. Buleiko, Boris A. Grigoriev, Vladimir A. Istomin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The presentation analyzes the phase behavior of fluidal gas condensate systems in low-temperature reservoirs of tight reservoir rocks. A number of deposits of the new gas-condensate and oil-gas-condensate fields of Siberia is characterized by these conditions. As examples are Chayandinskoe oil-gas-condensate field, Kovyktinskoye gascondensate field and Bovanenkovskoye oil-gas-condensate field. Particular attention is paid to the reservoir fluidal systems with a low condensate ratio due to the fact that standard methods with the use of conventional PVT experiments not guarantee the efficiency and accuracy of phase diagrams. A new experimental method of precision adiabatic calorimetry is proposed. Phase transitions are determined by the discontinuity of measured specific heat and temperature derivative of pressure at constant volume. The method makes possible to study the phase diagrams of reservoir fluids, including diagrams with a low condensate ratio, as well to determine PVT data of condensate dew point with higher accuracy. The results of experiments showed that phase behavior of hydrocarbon fluid in porous medium is transformed drastically by the porous medium effects (sorption/desorption processes). Capillary effects (capillary evaporation and capillary condensation) and their influence on phase behavior of hydrocarbon fluids were studied. Also a method of adiabatic calorimetry allows to determine with higher accuracy PVT data of hydrate formation and compositions of vapor-liquid and sorbed phases in reservoir. Hydrate formation of pure liquid and gaseous hydrocarbons and their mixtures in water saturated porous media were studied. Obtained data are topical for the new gas-condensate and oilgas-condensate fields of the Republic of Sakha (Yakutia), characterized by abnormally low reservoir temperatures.

Original languageEnglish
Title of host publicationInternational Gas Union Research Conference, IGRC 2017 - Natural Gas
Subtitle of host publicationCatalysing the Future
PublisherGovernment Institutes Inc.
Pages1935-1945
Number of pages11
ISBN (Electronic)9781510863170
Publication statusPublished - 2017
Externally publishedYes
EventInternational Gas Union Research Conference - Natural Gas: Catalysing the Future, IGRC 2017 - Rio de Janeiro, Brazil
Duration: 24 May 201726 May 2017

Publication series

NameInternational Gas Research Conference Proceedings
Volume3
ISSN (Print)0736-5721

Conference

ConferenceInternational Gas Union Research Conference - Natural Gas: Catalysing the Future, IGRC 2017
Country/TerritoryBrazil
CityRio de Janeiro
Period24/05/1726/05/17

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