Abstract Geothermal energy from Hot Dry Rock (HDR) with poor permeability is recognized
as a potential future energy source, and it can be exploited by Enhanced Geothermal …

Due to the low matrix porosity and permeability of gas shales, the horizontal well drilling and
hydraulic fracturing technologies become a necessity to exploit the unconventional shale …

An essential feature of shale is swelling induced by shale–liquid interactions. Shale swelling
is an important inducing factor for shale damage that affects shale mechanics. A better …

In the process of producing shale gas by fracturing, a large amount of water enters shale
due to shale imbibition, which affects the shale permeability because of the positive effect by …

Spontaneous imbibition is the main factor that reduces the fracturing efficiency and damages
gas production in shale gas wells, which is regulated by the gas–water interaction. Water …

This paper proposes a novel method of screen pipe completion and jet flow washing of
horizontal well double tubular strings to enhance coalbed methane (CBM) recovery. The …

In this study, a series of experiments were carried out on tight sandstone samples from the
Yangchang Formation in the Ordos Basin, China to investigate their pore-throat spaces and …

The shale rock, with relatively low permeability and porosity, is usually challenging to be
developed economically. Hydraulic fracturing is widely used as a stimulation technique for …

Tight oil sandstones have large oil reserves but low waterflooding efficiency and oil
recovery. The movable oil saturation (MOS) is a critical parameter for evaluating oil recovery …

Shale gas has enormous potential and has become a hotspot in recent decades. To exploit
shale gas, a variety of working fluids (drilling fluid, fracturing fluid, etc.) have to be applied in …