Quantitative evaluation model for tight sandstone reservoirs based on statistical methods - A case study of the Triassic Chang 8 tight sandstones, Zhenjing area, Ordos Basin, China

Geochemical characteristics and reasons for the carbon isotopic reversal of natural gas in the southern Jingbian gas field, Ordos Basin, China

“…The Ordos Basin can be divided into six tectonic units, i.e. the Yimeng Uplift, Weibei Uplift, Jinxi Fold Belt, Xiyuan Thrust Belt, Yi-Shaan Slope and Tianhuan Depression (Liu et al 2009;Yang et al 2014;Han et al 2017b;Li et al 2017;Shi et al 2019) (Fig. 1).…”

Study on frequency optimization and mechanism of ultrasonic waves assisting water flooding in low-permeability reservoirs

“…With the increasing demand for fuel and energy, the unconventional resources such as shale gas/oil, tight gas/oil and coalbed gas, play a growing important role in global energy supply [1] , [2] . In order to realize the industrial hydrocarbon production, petroleum engineers usually adopt the hydraulic fracturing to improve the inflow in low-permeability reservoirs [3] .…”

Acoustic and fractal analyses of the mechanical properties and fracture modes of bedding‐containing shale under different seepage pressures

“…In recent years, with the advancement of science and technology and the in-depth development of oil and gas exploration and development, unconventional oil and gas resources, such as tight sandstone gas and shale gas, have not only completely changed energy patterns in the United States but have also profoundly affected the global energy landscape. [1][2][3][4][5][6][7][8][9][10][11] Among these resources, shale gas is an unconventional natural gas present in shale mainly in the form of adsorption or in a free state. It is characterized by its capacity for large storage, wide distribution, a long mining period, a long service life, and huge mining potential.…”