Laboratory investigations of hydrous pyrolysis as ternary enhanced oil recovery method for Bazhenov formationстатья

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Дата последнего поиска статьи во внешних источниках: 17 октября 2017 г.

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[1] Laboratory investigations of hydrous pyrolysis as ternary enhanced oil recovery method for bazhenov formation / P. Evgeny, K. Anton, C. Аlexey et al. // Journal of Petroleum Science and Engineering. — 2017. — Vol. 156. — P. 852–857. Significant contents of different maturity kerogen in Bazhenov oil-shale formation are reserves of hydrocarbons to be recovered by enhanced oil recovery methods in nearest future when the conventional oil development drops crucially. A technology of In-Situ Kerogen conversion process into synthetic oil [10, 12] in Bazhenov formation opens broad perspectives in development of Bazhenov formation, west Siberia, Russia. Laboratory investigations of In-Situ Kerogen conversion process performed for Bazhenov formation rocks represented in this study for supercritical water extraction [10] accessed a feasibility of the tertiary hydrous pyrolysis hydrocarbons recovery method and gave good opportunity to obtain reliable data to check numerical model for that enhanced oil recovery method. There were done consequent stages of laboratory experiments in cells. First tests of hydrous pyrolysis extraction conducted on chip oil shale samples at temperatures of 300, 350, 400 and 480 oC and formation pressure of 30 MPa revealed a possibility of liquid HC extraction from sample starting from 400 oC. The secondary hydrocarbons conversion process was detected at reaction temperature of 480oC. Second stage of laboratory tests allowed to find optimal parameters for In-Situ Kerogen conversion – optimal conversion temperature, time of the conversion. The experiments on Bazhenov formation cores with low kerogen maturity were conducted in closed vessel at formation pressure and in temperature range of 250oС-400oС. It found that the synthetic oil produced at 300oС. Amount of liquid products increased at temperatures above 350oС but the secondary cracking processes had been observed also. It was discovered that hydrous pyrolysis and cracking leaded into rock porosity and permeability increasing so it allowed to input new data into numeric simulation and to assumed possibility of heating of farther disposed rocks.

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