We examine the motion of liquid injected into a liquid dominated geothermal reservoir, focusing on the situation in which the injected liquid has different temperature and composition from the reservoir fluid. As a result of these differences, the injected liquid will typically be of different density to the reservoir fluid, and will therefore spread through the reservoir under gravity. Owing t...

Tafone-like depressions have developed on the Aoshima sandstone blocks used for a masonry bridge pier in the coastal spray zone. A thin layer of partial granular disintegration was found on the surface in depressions. To evaluate quantitatively the strength of the thin weathered layer, the hardness was measured at the surface of the sandstone blocks using both an Equotip hardness tester and an ...

This study investigates the effects of uncertainty in rockphysics models on estimates of reservoir parameters from joint inversion of seismic AVA and CSEM data. The reservoir parameters are related to electrical resistivity using Archie’s law, and to seismic velocity and density using the Xu-White model. To account for errors in the rock-physics models, we use two methods to handle uncertainty:...

Resistivity is a determinant of the type rock and electrical properties or water-carrying layer. Primary data main source for investigation subsurface with Vertical Electric Sounding (VES) method. The purpose study to determine resistivity geological conditions detect aquifer reservoir lithology types designed as planned wells. geoelectric point was carried out on many 10 (ten) points produced ...

The southeastern Hazara is a portion of the Himalayan Fold-Thrust Belt, formed by interaction Indian Plate with Eurasian Plate. present research was conducted to analyse structural geometry and assess reservoir potential Cretaceous sequence (Chichali Formation Kawagarh Formation) in southern Hazara, Pakistan. mapped stratigraphic units range from Late Jurassic, Samana Suk early Eocene, Margalla...

—The Triassic System in the Zuni Mountains consists of one Middle Triassic unit, the Moenkopi Formation, the Upper Triassic Chinle Group, and the Upper Triassic-Lower Jurassic(?) Wingate Sandstone. The Chinle Group in the Zuni Mountains consists of six formations, in ascending order: Zuni Mountains (named here; = “mottled strata” of previous workers), Shinarump, Bluewater Creek, Petrified Fores...

The unconsolidated sandstone is a type of rock that has poor cementation, low strength, high porosity, and permeability. It highly compressible under stress exhibits non-linear plastic deformation during hydraulic fracturing construction in its reservoir. In this study, the mechanical properties with different permeability were studied, three-dimensional fracture propagation numerical model was...

The results of laboratory studies to determine the effect effective stress on permeability sandstone are presented. During test, samples were subjected a stepwise increase or decrease (at constant pore pressure) in specified step. values rock at different determined, and influence grain size reservoir matrix character change coefficient was also established. observed with an stress. It found th...

In petroleum engineering, imbibition is one of the most important elements for hydraulic fracturing and water flooding processes, when extraneous fluids are introduced to reservoir. However, in unconventional shale formations, osmosis has been often overlooked, but it can influence process between working fluid contacting formation rocks. The main objective this study understand effects fluid–r...

We simulate transport of a solute through three-dimensional images of different rock samples, with resolutions of a few microns, representing geological media of increasing pore-scale complexity: a sandpack, a Berea sandstone, and a Portland limestone. We predict the propagators (concentration as a function of distance) measured on similar cores in nuclear magnetic resonance experiments and the...