Estimation of rock frame weakening using time-lapse crosswell: The Frio brine pilot project

Geophysics ◽  
2016 ◽  
Vol 81 (6) ◽  
pp. B235-B245 ◽  
Author(s):  
Mohammed Al Hosni ◽  
Stéphanie Vialle ◽  
Boris Gurevich ◽  
Thomas M. Daley
Keyword(s):  
High Resolution ◽  
Rock Physics ◽  
Pilot Project ◽  
Time Lapse ◽  
Analysis Method ◽  
Resolution Time ◽  
S Wave ◽  
Geomechanical Properties ◽  
Before And After ◽  
Rock Microstructure

[Formula: see text] injection into subsurface reservoirs leads to pressure and saturation changes. Furthermore, [Formula: see text]-brine-minerals interaction could result in dissolution or reprecipitation of rock frame-forming minerals. Observed time-lapse seismic associated with [Formula: see text] injection into poorly consolidated sandstone at the Frio [Formula: see text] injection site (Texas, USA) could not be predicted using classical rock-physics models (i.e., models involving elastic changes in the rock frame due to saturations and/or pressures changes only, and assuming no changes in the rock microstructure). That, and the changes in the fluid chemistry after [Formula: see text] injection, suggests that the assumption of a constant rock microstructure might be violated. Using high-resolution time-lapse crosswell data, we have developed a methodology for estimating changes in the rock frame by quantifying the rock-frame drained moduli before and after [Formula: see text] injection. Based on rock microstructure diagnostics, we found that the changes in the drained frame elastic properties are due to the changes in the grain contact-cement percentage. The reduction in contact-cement percent is found to be variable throughout the reservoir, with a maximum near the injection well, down to 0.01% from the initial 0.1% contact cement; this results in more than 40% reduction in the drained frame shear and bulk moduli. [Formula: see text] saturation was estimated using this model for uniform and patchy saturation cases. Our rock-physics analysis may allow improved interpretation of time-lapse seismic for [Formula: see text] saturation in the context of other poorly consolidated sandstones with similar geomechanical properties. Having the P- and S-wave velocity time-lapse data is key to improve saturation estimates with this analysis method.

Unmanned Aerial Vehicle (UAV) time-lapse monitoring of the instability processes affecting Varano Hill: A case study of the ancient Roman site of Villa Arianna

2021 ◽  
Author(s):  
Renato Somma ◽  
Alfredo Trocciola ◽  
Daniele Spizzichino ◽  
Alessandro Fedele ◽  
Gabriele Leoni ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Data ◽  
Morphological Evolution ◽  
Archaeological Site ◽  
Pilot Project ◽  
Time Lapse ◽  
3D Models ◽  
Slope Instability ◽  
Test Case ◽  
Slope Instabilities

<p>The archaeological site of Villa Arianna - located on Varano Hill, south of Vesuvius - offer tantalizing information regarding first-century AD resilience to hydrogeological risk. Additionally, the site provides an important test case for mitigation efforts of current and future geo-hazard. Villa Arianna, notable in particular for its wall frescoes, is part of a complex of Roman villas built between 89 BC and AD 79 in the ancient coastal resort area of Stabiae. This villa complex is located on a morphological terrace that separates the ruins from the present-day urban center of Castellammare di Stabia. The Varano hill is formed of alternating pyroclastic deposits, from the Vesuvius Complex, and alluvial sediments, from the Sarno River. The area, in AD 79, was completely covered by PDCs from the Plinian eruption of Vesuvius. Due to the geomorphological structure the slope is prone to slope instability phenomena that are mainly represented by earth and debris flows, usually triggered by heavy rainfall. The susceptibility is worsened by changes in hydraulic and land-use conditions mainly caused by lack of maintenance of mitigation works. Villa Arianna is the subject of a joint pilot project of the INGV-ENEA-ISPRA that includes non-invasive monitoring techniques such as the use of UAVs to study the areas of the slope at higher risk of instability. The project, in particular, seeks to implement innovative mitigation solutions that are non-destructive to the cultural heritage. UAVs represent the fastest way to produce high-resolution 3D models of large sites and allow archaeologists to collect accurate spatial data that can be used for 3D GIS analyses. Through this pilot project, we have used detailed 3D models and high-resolution ortho-images for new analyses and documentation of the site and to map the slope instabilities that threatens the Villa Arianna site. Through multi-temporal analyses of different data acquisitions, we intend to define the detailed morphological evolution of the entire Varano slope. These analyses will allow us to highlight priority areas for future low-impact mitigation interventions.</p>

High-Resolution, Time-Lapse Imaging for Ecosystem-Scale Phenotyping in the Field

2012 ◽  
pp. 71-96 ◽  
Author(s):  
Tim Brown ◽  
Christopher Zimmermann ◽  
Whitney Panneton ◽  
Nina Noah ◽  
Justin Borevitz
Keyword(s):  
High Resolution ◽  
Time Lapse ◽  
Resolution Time ◽  
Time Lapse Imaging

Reciprocal velocity-porosity general linear form provides consistent and systematic industry-wide applications

2019 ◽  
Vol 7 (4) ◽  
pp. T751-T759
Author(s):  
Killian Ikwuakor
Keyword(s):  
Linear Form ◽  
Oil And Gas ◽  
Rock Physics ◽  
Time Lapse ◽  
General Linear ◽  
S Wave ◽  
Rock Property ◽  
Formation Evaluation ◽  
Clastic Rocks ◽  
Universal Applicability

Velocity is an important rock property that is required and used in different applications in petrophysics, rock physics, and seismic. The published literature shows a plethora of equations and models that relate velocity and porosity, a critical reservoir property. Attempts to account for the presence of shale in the formation invariably lead to more complicated relations. The inability of the industry to streamline these relations handicaps advancements in rock physics and formation evaluation, complicates the application of best practices in time-lapse seismic and fluid substitutions, and jeopardizes the integration of petrophysical, geologic, and seismic characteristics of oil and gas reservoirs. I have considered the following criteria to grade some of the different velocity-porosity relations in use today: (1) the significance of effective stress, (2) usefulness for interpreting geology, (3) predictive capability, and (4) universal applicability. Judging by these criteria, the general linear form, first prescribed by the late George R. Pickett, is the clear winner. The general linear form is a linear relationship between the reciprocal velocity and porosity. It passes theoretical and empirical justification. It is also valid for P- and S-wave velocities, yields easily to mathematical manipulation, and satisfies carbonate as well as clastic rocks for porosities encountered in everyday subsurface investigations. I evaluate practical examples in which the general linear form is the basis for multiple rock-typing criteria, comparative formation evaluation, and interpretive use of the [Formula: see text] ratio. Appropriate integration of the general linear form with other rock property relations provides avenues to redefine the [Formula: see text] ratio and acoustic impedance, and it expands the understanding and applications of reservoir elastic properties, as well as it constrains and streamlines rock physics models and applications.

Steam injection monitoring with high resolution time lapse seismic

2005 ◽  
Author(s):  
Marco Schinelli ◽  
Selma Sacramento ◽  
Odilon Keller
Keyword(s):  
High Resolution ◽  
Time Lapse ◽  
Steam Injection ◽  
Resolution Time

scholarly journals Microwells support high-resolution time-lapse imaging and development of preimplanted mouse embryos

2015 ◽  
Vol 9 (2) ◽  
pp. 022407 ◽  
Author(s):  
Yu-Hsiang Chung ◽  
Yi-Hsing Hsiao ◽  
Wei-Lun Kao ◽  
Chia-Hsien Hsu ◽  
Da-Jeng Yao ◽  
...  
Keyword(s):  
High Resolution ◽  
Time Lapse ◽  
Mouse Embryos ◽  
Resolution Time ◽  
Time Lapse Imaging

Moisture migration using high resolution time‐lapse radar tomography

1998 ◽  
Author(s):  
John E. Peterson ◽  
Susan S. Hubbard ◽  
Kenneth H. Williams ◽  
Yvonne Tsang ◽  
Jeff Roberts
Keyword(s):  
High Resolution ◽  
Time Lapse ◽  
Resolution Time ◽  
Moisture Migration

scholarly journals High Resolution Analysis of Proteome Dynamics during Bacillus subtilis Sporulation

2021 ◽  
Vol 22 (17) ◽  
pp. 9345
Author(s):  
Zhiwei Tu ◽  
Henk L. Dekker ◽  
Winfried Roseboom ◽  
Bhagyashree N. Swarge ◽  
Peter Setlow ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
High Resolution ◽  
Nutrient Limitation ◽  
Time Lapse ◽  
Regulatory Proteins ◽  
Coat Proteins ◽  
Resolution Time ◽  
High Resolution Analysis ◽  
Resolution Analysis ◽  
A Cell

Bacillus subtilis vegetative cells switch to sporulation upon nutrient limitation. To investigate the proteome dynamics during sporulation, high-resolution time-lapse proteomics was performed in a cell population that was induced to sporulate synchronously. Here, we are the first to comprehensively investigate the changeover of sporulation regulatory proteins, coat proteins, and other proteins involved in sporulation and spore biogenesis. Protein co-expression analysis revealed four co-expressed modules (termed blue, brown, green, and yellow). Modules brown and green are upregulated during sporulation and contain proteins associated with sporulation. Module blue is negatively correlated with modules brown and green, containing ribosomal and metabolic proteins. Finally, module yellow shows co-expression with the three other modules. Notably, several proteins not belonging to any of the known transcription regulons were identified as co-expressed with modules brown and green, and might also play roles during sporulation. Finally, levels of some coat proteins, for example morphogenetic coat proteins, decreased late in sporulation.

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