The cuttings transport efficiency of various drilling fluids has been studied in several approaches. This is an important aspect, since hole cleaning often a bottleneck well construction. studies so far have targeted the fluid cuttings’ capability through experiments, simulations or field data. Observed differences due to changes properties and compositions reported but not always fully underst...

Long marine sedimentary cores can be effective in paleo-climate reconstruction. The present research aims at analyzing  the temporal variation of temperature as an important climate parameter and also variations in metal concentrations (As, Ba, Cd, Li, Mo, Mg, Mn, Na, Pb, Sr, Zn, Fe, Ca, Al) of two long sedimentary cores at the Persian Gulf back to the Holocene. The obtained results revealed th...

Leg 135 of the Ocean Drilling Program drilled and cored eight sites across the Lau Basin and adjacent Tonga Ridge to study the geological evolution of a backarc basin and adjacent oceanic arc and forearc. Six sites (Sites 834, 835, 836, 837, 838, and 839) were drilled within the Lau Basin, each within smaller and narrower (<10 km) north-south fault basins and collectively representing a broad e...

Abstract Refreezing of meltwater in firn is a major component Greenland ice-sheet's mass budget, but situ observations are rare. Here, we compare the density and total ice layer thickness upper 15 m 19 new 27 previously published cores drilled at locations southwest (1850–2360 a.s.l.) between 1989 2019. At all sites, covaries with over time space. two sites earliest (1989 1998), bulk increased ...

The study of the fabric and microstructure ice at shear margin Antarctic sheet is great significance for understanding flow its contributions to sea level rise. In this study, twenty-three one-meter-long cores were drilled from blue areas Dalk Glacier, Antarctica. these are analyzed using a G50 analyzer. This shows that shallow in region present cluster as consequence stress. grain size decreas...

• Calcite precipitation shows porosity reduction with microstructural analysis. Cement paste mechanical parameters are reduced under scCO 2 despite calcite precipitation. Analysis of micro and macro experimental behaviour enables better performance the chemo-mechanical model. The change in average properties cement matrix is predicted using coupled model for attack. Wells drilled carbon storage...

A program of field loading tests was conducted to measure the axial response of drilled foundations constructed using a variety of different drilling techniques. The research was performed at the Auburn University National Geotechnical Experimentation Site at Spring Villa, Alabama in Piedmont geology composed of silty soils formed by weathering of parent metamorphic rocks. A total of 10 drilled...