Results 21 to 30 of about 1,454,899 (314)

Revenue Risk of U.S. Tight-Oil Firms [PDF]

open access: yesEnergies, 2016
American U.S. crude oil prices have dropped significantly of late down to a low of less than $30 a barrel in early 2016. At the same time price volatility has increased and crude in storage has reached record amounts in the U.S. America. Low oil prices in particular pose quite a challenge for the survival of U.S. America’s tight-oil industry.
Luis Abadie, José Chamorro
openaire   +3 more sources

Three dimensional characterization and quantitative connectivity analysis of micro/nano pore space

open access: yesPetroleum Exploration and Development, 2016
Evaluation is performed on pore connectivity of unconventional reservoirs using 3-D FIB-SEM imaging characterization and digital rock techniques. 3-D images are first obtained by FIB-SEM device and then transformed into digital pore structure model ...
Liang SUN   +4 more
doaj   +1 more source

Progress and development directions of shale oil reservoir stimulation technology of China National Petroleum Corporation

open access: yesPetroleum Exploration and Development, 2021
By reviewing the development history of shale oil reservoir stimulation technology of PetroChina Company Limited (PetroChina), we have systematically summarized the main progress of shale oil reservoir stimulation technology of CNPC in five aspects ...
Qun LEI   +8 more
doaj   +1 more source

Characteristics of lacustrine shale porosity evolution, Triassic Chang 7 Member, Ordos Basin, NW China

open access: yesPetroleum Exploration and Development, 2015
With low mature Triassic Chang 7 Member shale samples from the Ordos Basin as study object, the 3-D porosity evolution with temperature increase and its main controlling factors are analyzed based on the physical modeling under high temperature ...
Songtao WU   +9 more
doaj   +1 more source

Experimental Study on the Effect of Supercritical CO2 on Mechanical Properties and Fracture Characteristics of Longmaxi Shale

open access: yesAdvances in Materials Science and Engineering, 2023
Conventional hydraulic fracturing techniques typically consume large amounts of water when producing shale gas. Fracking fluids may cause environmental pollution. In contrast, supercritical carbon dioxide (scCO2) (above 31.8°C, 7.29 MPa) can displace CH4
Ran Zhang   +4 more
doaj   +1 more source

Analytical Model of Wellbore Stability Analysis of Inclined Well Based on the Advantageous Synergy among the Five Strength Criteria

open access: yesGeofluids, 2023
The proper drilling mud density is vital for wellbore stability maintenance, which relies on both stress distribution on the borehole wall and rock strength.
Yufan Shi   +5 more
doaj   +1 more source

Application of charging effects in evaluating storage space of tight reservoirs: A case study from Permian Lucaogou Formation in Jimusar sag, Junggar Basin, NW China

open access: yesPetroleum Exploration and Development, 2015
According to the study of the electron beam charging effects of oil-bearing samples from tight reservoirs, a “Two-step Cross-section Back Scattered Electron (BSE) Imaging Method” is put forward, revealing the distribution of residual oil (the oil without
Xiaoqi WANG   +7 more
doaj   +1 more source

Molecular simulation of CO2/CH4 competitive adsorption in organic matter pores in shale under certain geological conditions

open access: yesPetroleum Exploration and Development, 2016
To reveal competitive absorption behavior between CH4 and CO2 in organic matter (OM) nanopores, OM pore structure was first characterized using focused ion beam−scanning electron microscope (FIB-SEM) and pore-size distribution was studied using N2 ...
Xiaoqi WANG   +6 more
doaj   +1 more source

Thermo-Hydro-Mechanical Coupling Numerical Simulation on Mechanical Heterogeneity of Coal Rock

open access: yesGeofluids, 2022
Coal rock is a porous medium composed of organic matter and inorganic minerals, and it is very complex and highly heterogeneous. Coal bed methane (CBM) production is a thermo-hydro-mechanical (THM) coupling process in heterogeneous coal rock.
Shuiqing Hu   +7 more
doaj   +1 more source

Movable Fluid Distribution Characteristics and Microscopic Mechanism of Tight Reservoir in Yanchang Formation, Ordos Basin

open access: yesFrontiers in Earth Science, 2022
Tight sandstone reservoirs have smaller pore throats, complex structures, strong heterogeneity in the pore throat system, and significant differences in fluid distribution.
Ke Wu   +9 more
doaj   +1 more source

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