Overcoming challenges in the classification of deep geothermal potential [PDF]
, 2015 The geothermal community lacks a universal definition of deep geothermal systems. A minimum depth of 400 m is often assumed, with a further sub-classification into middle-deep geothermal systems for reservoirs found between 400 and 1000 m.
Breede, K. +2 more
core +1 more source
Soil radium, soil gas radon and indoor radon empirical relationships to assist in post-closure impact assessment related to near-surface radioactive waste disposal [PDF]
, 2009 Least squares (LS), Theil’s (TS) and weighted total least squares (WTLS) regression analysis methods are used to develop empirical relationships between radium in the ground, radon in soil and radon in dwellings to assist in the post-closure assessment ...
J.D. Appleton +32 more
core +4 more sources
Event-based contact angle measurements inside porous media using time-resolved micro-computed tomography [PDF]
, 2020 Hypothesis: Capillary-dominated multiphase flow in porous materials is strongly affected by the pore walls' wettability. Recent micro-computed tomography (mCT) studies found unexpectedly wide contact angle distributions measured on static fluid ...
Bultreys, Tom +2 more
core +2 more sources
Nuclear Magnetic Resonance and High-Speed Centrifugation for Gas-Water Relative Permeability Curve of Low-Permeability and Tight Sandstone [PDF]
E3S Web of ConferencesGas-water relative permeability curve is the foundation of gas reservoir dynamic analysis and numerical simulation. It is generally obtained through gas displacing water experiment.
Yang Fenglai +9 more
doaj +1 more source
Optimization of fracturing parameters for tight sandstone gas reservoirs
IOP Conference Series: Earth and Environmental Science, 2021 Due to the poor physical properties of tight sandstone, the pore throat is small and the connectivity is poor. In the process of development, fracturing construction is often needed. Reasonable fracturing construction parameters are the key and difficult points of fracturing design, and also the key factor to determine the success of fracturing. Aiming
Yu Dou, Peng Hu, Runhua Zhu
openaire +1 more source
Influence of supercritical CO2 on the physical property of tight sandstone
PetroleumIn low-pressure gas reservoirs, water-based fracture fluid is difficult to flowback, which is unfavorable for several tight sandstone gas reservoirs in the Sichuan Basin with low pressure and high permeability geological characteristics.
Huan Peng +7 more
doaj +1 more source
Experimental Study on Tight Sandstone Reservoir Gas Permeability Improvement Using Electric Heating
Energies, 2022 Although tight sandstone gas formations are abundant in China, their single-well productivities and exploitation efficiencies are restricted by water blocking from drilling and completion. At present, shut-in, chemical additive application, and hydraulic
Ze Chen, Gao Li, Xu Yang, Yi Zhang
doaj +1 more source
Development status and prospect of tight sandstone gas in China
Natural Gas Industry B, 2022 As one of the important types of unconventional gas, tight gas is widely distributed in various major petroliferous basins in the world. The breakthrough of reservoir reconstruction technology and the reduction of development cost promote the scale and industrial development of tight gas.
Ailin Jia +5 more
openaire +2 more sources
Natural Gas Industry B, 2023 Exploration and development practices have proved that staged volumetric fracturing stimulation in horizontal wells is a key technology for tight sandstone gas development, and reservoir sweet spot is an important basis for the perforation position ...
Haiyan Zhu, Ding Gong, Bing Zhang
doaj +1 more source
Permeability and permeability anisotropy in Crab Orchard sandstone:experimental insights into spatio-temporal effects [PDF]
, 2017 Permeability in tight crustal rocks is primarily controlled by the connected porosity, shape and orientation of microcracks, the preferred orientation of cross-bedding, and sedimentary features such as layering. This leads to a significant permeability
Benson, Philip M., Gehne, Stephan
core +2 more sources