Global shale oil is abundant in geological reserves, but there are widespread problems of
difficult exploitation and unsatisfactory oil recovery. CO 2 injection in shale reservoirs can …

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 …

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 …

In recent times, particularly in the 21st century, there has been an alarming increase in the
demand for global energy, along with continuous depletion in conventional oil reservoirs …

Advancements in horizontal drilling with hydraulic fracturing have enabled commercial oil
production from Bakken tight oil reservoirs. However, the primary recovery factor remains …

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 …

With the relatively modest natural gas price, producing oil from unconventional shale
reservoirs has attracted more and more interest from oil operators. Although many …

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 …

Experimental works and numerical simulation approaches have revealed that CO 2 huff-n-
puff could be a promising enhanced oil recovery (EOR) method of shale oil reservoirs. Latest …