Oil and Gas

Biography

Biography: Jinsheng Wang

Abstract

For shale gas development, low recovery factor and greenhouse gas emissions are two important issues. The average recovery factor for shale gas is around 10%, resulting in a large footprint with only a small portion of the resource recovered. Meanwhile, emissions of methane, a potent greenhouse gas could undermine the global efforts of reducing greenhouse gas emissions into the atmosphere. Injection in shale gas fields of CO₂ captured from industrial emitters such as fossil-fuel power plants could increase the recovery of shale gas and achieve CO₂ storage in gas-depleted shale. This could obtain carbon credits and improve the economics for shale gas production. It may also turn gas-depleted shale into a sink of CO₂ and contribute to reduction of greenhouse gas emissions. In shale gas field, methane exists as free gas in void space and as adsorbed gas on organic matter. Injected CO₂ could push the free gas toward the production well and displace the adsorbed gas because CO₂ has a higher tendency to be adsorbed compared to methane. As a result CO₂ is trapped in gas-depleted shale to enable CO₂ storage. CO₂ could also drive out gas condensate that is trapped in the shale and impedes the gas flow. As part of our research on enhanced shale gas recovery with storage of CO₂, we have carried out sorption experiments for CO₂ and methane. The results with samples from a Canadian shale gas reservoir suggest that the shale could adsorb 10 times more CO₂ than methane. That is to say, with every cubic meter of methane produced, 10 cubic meters of CO₂ could be stored. We have also studied swelling of gas condensate by CO₂, which could mobilize the trapped condensate and facilitate the gas flow. Other interesting findings will also be presented.

Figure 2. Time dependence of the size of gas condensate drop.

Recent Publications 

1. Wang Z, Wang J, Lan C, He I, Ko V, Ryan, D., Wigston, A (2016) A study on the impact of SO2 on CO2 injectivity for CO2 storage in a Canadian saline aquifer. Applied Energy 184:329-336.
2. Wang J, Wang Z, Ryan D, Lan C (2015) A study of the effect of impurities on CO2 storage capacity in geological formations. International Journal of Greenhouse Gas Control 42: 132-137.
3. Ng S, Al-Sabawi M, Wang J, Ling H, Zheng Y. Wei Q, Ding F, Little E (2015) FCC coprocessing oil sands heavy gas oil and canola oil. 1. Yield structure. Fuel 156:163-176.
4. Wang J, Ryan D, Anthony EJ, Wigston A (2012) The effect of impurities in oxyfuel flue gas on CO2 storage capacity. International Journal of Greenhouse Gas Control 11: 158-162.
5. Wang J, Ryan D, Anthony EJ (2011) Reducing the greenhouse gas footprint of shale gas. Energy Policy 39: 8196-8199.