Results 291 to 300 of about 2,770,914 (334)

Effect of fines migration and mineral reactions on CO2-water drainage relative permeability

, 2020
CO2-water drainage relative permeability is usually measured in laboratory using a three-stage unsteady-state flooding on cores. This three-stage flooding involves injecting water, then CO2-saturated water, and finally water-saturated supercritical CO2 ...
J. Ge, Xiaozhou Zhang, F. Othman, Yamin Wang, H. Roshan, F. Le-Hussain   +5 more
semanticscholar   +1 more source

WATER‐SENSITIVITY AND MIGRATION OF FINES IN THE HOPEMAN SANDSTONE

Journal of Petroleum Geology, 1984
Water‐sensitivity tests have been performed on samples of the Triassic Hopeman Sandstone from Clashach Quarry near Elgin in Scotland. Despite the apparent lack of clay minerals in the samples, the permeability of core plugs to NaCl and KCl brines decreases with progressive volume of efflunent, and drops dramatically when distilled water is flushed ...
Andrew Lever, Richard A. Dawe
openaire   +2 more sources

Fine structure of shark leucocytes during chemotactic migration

Tissue and Cell, 1989
It has previously been demonstrated that peripheral blood leucocytes of the nurse shark (Ginglymostoma cirrhatum) are capable of in vitro chemotaxis. In the present study we have identified the chemotactic cells as the shark granulocyte and monocyte-macrophage. Chemotaxis assays were set up in blind well chambers.
S H, Smith, S D, Obenauf, D S, Smith
openaire   +2 more sources

Efficient fine-grain thread migration with active threads

Proceedings of the First Merged International Parallel Processing Symposium and Symposium on Parallel and Distributed Processing, 2002
Thread migration is established as a mechanism for achieving dynamic load sharing. However, fine-grained migration has not been used due to the high thread and messaging overheads. This paper describes a fine-grained thread migration system whose extensible event mechanism permits an efficient interface between threads and communications without ...
Boris Weissman, Benedict Gomes, Jürgen Quittek, Michael Holtkamp   +3 more
openaire   +1 more source

Analytical Modelling of Low-salinity Waterflooding with Fines Migration

Proceedings, 2016
Low-salinity waterflood is presently one of the most cost-effective EOR methods. The governing system of equations for oil and water flow with changing water salinity is derived. So-called mechanistic model is developed. This model accounts for two EOR factors: A) fines migration, which is induced by salinity variation and reduces the relative ...
Borazjani, S., Behr, A., Genolet, L., Van Der Net, A., You, Z., Bedrikovetsky, P.   +5 more
openaire   +2 more sources

Developing a methodology to characterize formation damage (pore plugging) due to fines migration in sand control tests

, 2020
Stand-alone screens (SAS) have been widely used in steam assisted gravity drainage (SAGD) operations. Although many researchers investigated the flow performance of SAS through sand control tests, the formation damage (pore plugging) due to fines ...
Chenxi Wang, J. D. M. Pallares, M. Haftani, A. Nouri   +3 more
semanticscholar   +1 more source

Injectivity formation damage due to fines migration

The APPEA Journal, 2018
Formation damage by fines migration during low-salinity water injection can greatly affect field-scale waterflooding projects. In this paper, we present the basic governing equations for single-phase flow with detachment, migration and straining of natural reservoir fines.
Larissa Chequer, Mohammad Bagheri, Abbas Zeinijahromi, Pavel Bedrikovetsky   +3 more
openaire   +1 more source

Fines Migration in Aquifers and Oilfields: Laboratory and Mathematical Modelling

2018
Migration of natural reservoir fines is one of the main causes of formation damage in oil and gas fields. Yet, fines migration can be employed for enhancing reservoir sweep and water production control. Permeability decline due to fine particles’ detachment from reservoir rocks, mobilisation, migration and straining has been widely reported in the ...
Yang, Y., Siqueira, F. D., Vaz, A., Badalyan, A., You, Z., Zeinijahromi, A., Carageorgos, T., Bedrikovetsky, P.   +7 more
openaire   +3 more sources

Fine-Scaled Orientation Changes in Migrating Shorebirds

Ardea, 2012
Flight directions and routes of migrating birds are determined by the birds' compass orientation, but also by effects of wind, social influence, responses to topography and landmarks, and to navigation cues. We investigated the orientation and routes taken by arctic shorebirds during autumn migration in southern Sweden at three different sites situated
Johanna Grönroos, Martin Green, Thomas Alerstam   +2 more
openaire   +1 more source

Possible migration of oil in the finely dispersed state

International Geology Review, 1980
The authors examine the theoretical possibility of hydrocarbon migration as a finely dispersed emulsion and give experimental data from spontaneous ordinary and chemical emulsification of individual hydrocarbons in aqueous solutions of olNa. In a natural environment, in the presence of corresponding conditions (alkalinity of the waters, the presence of
V. I. Sergeyevich, T. P. Safronova
openaire   +1 more source