Highlights•Provide a comprehensive description of alkaline-crude oil reaction.•Quantify how
much surfactant can be generated by such reaction.•Discuss about the reasons for low oil …

Unconventional resources have played a significant role in changing oil industry plans
recently. Shale formations in North America have huge oil in place, 900 Billion barrels of …

Primary oil recovery from fractured unconventional formations, such as shale or tight sands,
is typically less than 10%. The development of an economically viable enhanced oil …

Unconventional formations such as the Eagle Ford, Niobrara and Bakken have made a
significant impact on the oil industry over the last decade, but primary recovery factors are …

Shale oil reservoirs such as Bakken, Niobrara, and Eagle Ford have become the main target
for oil and gas investors as conventional formations started to be depleted and diminished in …

Increasing energy and environmental demands raise intensive interests on cleaner but
challenging resource explorations, where unconventional tight reservoirs attract attentions …

CO2 huff-n-puff has been proven to be the most effective enhanced oil recovery (EOR)
method in shale oil reservoirs. The injected CO2 will replenish reservoir energy and …

Oil production from unconventional tight Bakken reservoirs in North America has been
booming since the early 2000s because of the widespread application of horizontal well …

Because of the ultra-low permeability of tight formations, gas injection is believed to be an
effective method to enhance oil recovery (EOR). However, it has two modes: huff-n-puff …

We present the first comprehensive experimental evaluation of gas injection for EOR in
organic rich shale. Experiments in preserved core demonstrated the potential of CO2 to …