Research efforts towards CO 2 enhanced geothermal systems (CO 2-EGS) are increasing
due to potentially high heat extraction efficiencies. It is well known that CO 2 properties are …

A CO 2 enhanced geothermal system (EGS) with multilateral wells is proposed to exploit hot
dry rock (HDR) in this paper. For this EGS, several upper injection and lower production …

Coalbed methane (CBM) has emerged as one of the clean unconventional resources to
supplement the rising demand of oil and gas. Analyzing and predicting CBM production …

Previous models neglected the effect of frictional heating on steam quality and enthalpy in
wellbores when saturated steam is injected into multi-point injection horizontal wellbores. In …

Coalbed methane (CBM) is an important unconventional natural gas. Exploitation of
multilayered CBM reservoir is still facing the challenge of low production rate. Radial …

In water-bearing gas reservoirs, water existence affects gas production performances due to
two-phase flows occurring in matrix and fracture systems. Under the background of staged …

Various fracture-propagation models have been used to capture complex hydraulic fracture
(HF) geometry. However, they cannot obtain the production performance. Besides, many …

Multiple fractured horizontal wells (MFHWs) currently are the only possible means of
commercial production from the low and ultra-low permeability unconventional gas …

Coalbed methane (CBM) reservoirs are naturally fractured formations with cleats
surrounding the coal matrix. Analyzing and predicting CBM production performance is …

Coalbed methane reservoirs exhibit a low strength and high heterogeneity, rendering them
susceptible to coal fines generation during hydraulic fracturing operations. The detrimental …