Carbon capture and storage (CCS) is an essential technology for achieving carbon neutrality. Depositional environments with sandstone interbedded shale layers are promising CO2 because they can retain beneath continuous discontinuous layers. However, conventional numerical simulation of shale–sandstone systems computationally challenging due to the large contrast in properties between significa...

Abstract Pore pressure is a crucial factor affecting reservoir stimulation, especially in unconventional reservoirs, because it can control crack initiation and propagation. However, studies on the effect of initial pore hydraulic fracturing low-permeability reservoirs are lacking, mechanism remains unclear. Therefore, we conducted tests under pressure, proposed an improved criterion to elucida...

Ten road cut samples collected from five lithological sections of Lokoja sandstone formation in the Middle Niger basin were investigated using integrated granulometric, petrographic and geochemical analyses. Results of grain size analysis; standard deviation and skewness which ranges from 0.08 to -0.05 and 0.59 to -0.07 respectively suggest very well sorted to moderately well sorted sediments. ...

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. ABSTRACT The purpose of this paper is to test how well numerical calculations can predict transport properties of p...

It is vital for the study of fracturing parameters optimal design and fluids rate forecast to calculate fracture propagation parameters accurately. In order to calculate fracture propagation accurately, in this paper, the model for calculating the value of energy release when the rock body collapses was established basing on catastrophe theory, considering that the collapse of fracturing rock b...

Abstract Compression-wave velocity and shear-wave are important elastic parameters describing deeply tight sandstone. Limited by cost technical reasons, the conventional logging data generally lack velocity. In addition, existing rock physics theory is difficult to accurately establish models due complex pore structure of sandstone reservoir. With rapid development artificial intelligence, atte...

Rock coatings formed on petroglyphs at Petrified Forest National Park both preserve the art from erosional processes and provide tools to understand the art’s chronology. Erosional processes of rock fall from fissuresol wedging, splintering of sandstone, and flaking are somewhat offset by case hardening surfaces by addition of rock coatings. 20th century graffiti can be distinguished from truly...

In this work the likelihood of asphaltene deposition problems during dynamic displacement of oil by natural gas in unconsolidated porous media is experimentally inspected. The two different rock materials, limestone and sandstone, are used as a representative of porous media. Dynamic flow experiments indicate that the increase of natural gas injection increases asphaltene deposition in the unco...

Abstract Geothermal energy production often involves use of corrosion inhibitors. We performed rock mechanical experiments (room temperature; confining pressure 10/20/30 MPa) on typical reservoir rocks (Bentheim sandstone and Treuchtlinger limestone) in contact with two different inhibitor solutions or demineralized water. The show no discernible difference strength between inhibitors water, at...