Experimental and numerical upscale study of cyclic methane injection to enhance shale oil recovery

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Scopus citations

Abstract

Cyclic gas injection is considered as an effective and quick responding recovery process to enhance the shale oil recovery compared with water or gas flooding. And many finished lab experiments using Carbon dioxide and Nitrogen cyclic injection with core samples have proved its effectiveness. The impacts of oil saturation time, soaking time, depletion time, injection pressure, and cycle numbers have been tested in our previous work. However, the influence of core size on oil recovery is a very important parameter when upscale the core size to field level. Also, methane is a more economic and convenient gas source when considering the injection cost compared with carbon dioxide. In order to get the more accurate and reliable results, cyclic methane injection were used and the cores from Eagle Ford with different diameters (1 inch, 2 inches, 2.5 inches, 3 inches, 3.5 inches and 4 inches) were saturated with crude oil from Wolfcamp in this experiment. A numerical model was built using the typical reservoir properties from Eagle Ford to simulate cyclic methane injection. Sensitivity analysis, history matching and size upscale are conducted. The experiment results show that oil recovery factor decreases with the incremental of core sizes from 1 to 4 inches. Simulation results show that the most important parameter is injection pressure followed by matrix permeability, porosity and methane diffusivity. When upscale the core size to field level, the oil recovery decreased.

Original languageEnglish
Title of host publicationFuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting
PublisherAIChE
Pages42-53
Number of pages12
ISBN (Electronic)9781510818620
StatePublished - 2015
EventFuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting - Salt Lake City, United States
Duration: Nov 8 2015Nov 13 2015

Publication series

NameFuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting

Conference

ConferenceFuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting
CountryUnited States
CitySalt Lake City
Period11/8/1511/13/15

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    Li, L., Sheng, J. J., & Watson, M. (2015). Experimental and numerical upscale study of cyclic methane injection to enhance shale oil recovery. In Fuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting (pp. 42-53). (Fuels and Petrochemicals Division 2015 - Core Programming Area at the 2015 AIChE Annual Meeting). AIChE.