Stimulation of High Temperature SAGD Producer Wells Using a Novel Chelating Agent (GLDA) and Subsequent Geochemical Modeling Using PHREEQC

2015 ◽  
Author(s):  
Z. Ouled Ameur ◽  
V.Y. Kudrashou ◽  
H.A. Nasr-El-Din ◽  
J.P.J. Forsyth ◽  
J.J. Mahoney ◽  
...  
Keyword(s):  
High Temperature ◽  
Geochemical Modeling ◽  
Chelating Agent ◽  
Stimulation Of

Stimulation of High-Temperature Steam-Assisted-Gravity-Drainage Production Wells Using a New Chelating Agent (GLDA) and Subsequent Geochemical Modeling Using PHREEQC

2019 ◽  
Vol 34 (01) ◽  
pp. 185-200 ◽  
Author(s):  
Z. Ouled Ameur ◽  
Viacheslau Y. Kudrashou ◽  
Hisham A. Nasr-El-Din ◽  
Jeffrey P. J. Forsyth ◽  
John J. Mahoney ◽  
...  
Keyword(s):  
High Temperature ◽  
Geochemical Modeling ◽  
Chelating Agent ◽  
Gravity Drainage ◽  
Steam Assisted Gravity Drainage ◽  
Production Wells ◽  
High Temperature Steam ◽  
Stimulation Of

Stimulation of High-Temperature Sandstone Formations From West Africa With Chelating Agent-Based Fluids

2008 ◽  
Vol 23 (01) ◽  
pp. 32-38 ◽  
Author(s):  
Syed A. Ali ◽  
Emee Ermel ◽  
John Clarke ◽  
Michael J. Fuller ◽  
Zhijun Xiao ◽  
...  
Keyword(s):  
High Temperature ◽  
West Africa ◽  
Chelating Agent ◽  
Agent Based ◽  
Stimulation Of

Stimulation of High-Temperature Sandstone Formations from West Africa with Chelating Agent-Based Fluids

2005 ◽  
Author(s):  
Syed Afaq Ali ◽  
Emee Ermel ◽  
John Clarke ◽  
Michael James Fuller ◽  
Zhijun Xiao ◽  
...  
Keyword(s):  
High Temperature ◽  
West Africa ◽  
Chelating Agent ◽  
Agent Based ◽  
Stimulation Of

Chelating Agent-Based Fluids for Optimal Stimulation of High-Temperature Wells

2002 ◽  
Author(s):  
A. Husen A. Ali ◽  
W.W. Frenier ◽  
Z. Xiao ◽  
M. Ziauddin
Keyword(s):  
High Temperature ◽  
Chelating Agent ◽  
Agent Based ◽  
Stimulation Of

α1-Adrenoceptor-induced Mg2+ extrusion from rat hepatocytes occurs via Na+-dependent transport mechanism

2001 ◽  
Vol 280 (6) ◽  
pp. G1145-G1156 ◽  
Author(s):  
Theresa E. Fagan ◽  
Andrea Romani
Keyword(s):  
Adrenergic Receptor ◽  
Chelating Agent ◽  
Rat Hepatocytes ◽  
Channel Blockers ◽  
Inositol Trisphosphate Receptor ◽  
Intracellular Ca ◽  
A Cell ◽  
Dependent Transport ◽  
Trisphosphate Receptor ◽  
Stimulation Of

The stimulation of the α1-adrenergic receptor by phenylephrine results in a sizable extrusion of Mg2+ from liver cells. Phenylephrine-induced Mg2+ extrusion is almost completely abolished by the removal of extracellular Ca2+ or in the presence of SKF-96365, an inhibitor of capacitative Ca2+entry. In contrast, Mg2+ extrusion is only partially inhibited by the Ca2+-channel blockers verapamil, nifedipine, or (+)BAY-K8644. Furthermore, Mg2+ extrusion is almost completely prevented by TMB-8 (a cell-permeant inhibitor of the inositol trisphosphate receptor), 1,2-bis(2-aminophenoxy)ethane- N,N,N′,N′-tetraacetic acid (an intracellular Ca2+-chelating agent), or W-7 (a calmodulin inhibitor) Thapsigargin can mimic the effect of phenylephrine, and the coaddition of thapsigargin and phenylephrine does not result in an enlarged extrusion of Mg2+ from the hepatocytes. Regardless of the agonist used, Mg2+ extrusion is inhibited by >90% when hepatocytes are incubated in the presence of physiological Ca2+ but in the absence of extracellular Na+. Together, these data suggest that the stimulation of the hepatic α1-adrenergic receptor by phenylephrine results in an extrusion of Mg2+ through a Na+-dependent pathway and a Na+-independent pathway, both activated by changes in cellular Ca2+.

Well Clean-Up Using a Combined Thermochemical/Chelating Agent Fluids

2019 ◽  
Vol 141 (10) ◽  
Author(s):  
Mohamed Mahmoud
Keyword(s):  
High Temperature ◽  
Filter Cake ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Chelating Agent ◽  
Drilling Fluids ◽  
Gas Wells ◽  
Oil And Gas Wells ◽  
Different Types ◽  
Cake Removal

The well clean-up process involves the removal of impermeable filter cake from the formation face. This process is essential to allow the formation fluids to flow from the reservoir to the wellbore. Different types of drilling fluids such as oil- and water-based drilling fluids are used to drill oil and gas wells. These drilling fluids are weighted with different weighting materials such as bentonite, calcium carbonate, and barite. The filter cake that forms on the formation face consists mainly of the drilling fluid weighting materials (around 90%), and the rest is other additives such as polymers or oil in the case of oil-base drilling fluids. The process of filter cake removal is very complicated because it involves more than one stage due to the compatibility issues of the fluids used to remove the filter cake. Different formulations were used to remove different types of filter cake, but the problem with these methods is the removal efficiency or the compatibility. In this paper, a new method was developed to remove different types of filter cakes and to clean-up oil and gas wells after drilling operations. Thermochemical fluids that consist of two inert salts when mixed together will generate very high pressure and high temperature in addition to hot water and hot nitrogen. These fluids are sodium nitrate and ammonium chloride. The filter cake was formed using barite and calcite water- and oil-based drilling fluids at high pressure and high temperature. The removal process started by injecting 500 ml of the two salts and left for different time periods from 6 to 24 h. The results of this study showed that the newly developed method of thermochemical removed the filter cake after 6 h with a removal efficiency of 89 wt% for the barite filter cake in the water-based drilling fluid. The mechanisms of removal using the combined solution of thermochemical fluid and ethylenediamine tetra-acetic acid (EDTA) chelating agent were explained by the generation of a strong pressure pulse that disturbed the filter cake and the generation of the high temperature that enhanced the barite dissolution and polymer degradation. This solution for filter cake removal works for reservoir temperatures greater than 100 °C.

THE MULTILAYERED HIGH Tc SUPERCONDUCTORS; THE JOSEPHSON MODEL OF WEAK LINKS

1995 ◽  
Vol 09 (21) ◽  
pp. 2811-2820
Author(s):  
VALERY A. CHERENKOV
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
High Temperature Superconductors ◽  
Weak Links ◽  
High Tc Superconductors ◽  
Main Attention ◽  
Multilayered Structures ◽  
High Tc ◽  
Stimulation Of

The multilayered (N-S(D)-N)-types structures have been observed: there are the traditional Niobium low-temperature superconductors and new high-temperature superconductors. The main attention had been directed to the anisotropy, defectively and the stimulation of the superconductivity in the multilayered structures.

The stimulation of daughter redia production during the larval development of Fasciola hepatica

Parasitology ◽  
1976 ◽  
Vol 72 (3) ◽  
pp. 245-257 ◽  
Author(s):  
R. A. Wilson ◽  
Tove Draskau
Keyword(s):  
High Temperature ◽  
Larval Development ◽  
Fasciola Hepatica ◽  
Snail Host ◽  
Parasite Development ◽  
Cercarial Production ◽  
Stimulation Of

SummaryIn snails maintained at 20 °C rediae of Fasciola hepatica emerge from sporocysts from 11 days after infection onwards. The number of mother rediae rises steadily thereafter until at least 40 days after infection. Daughter rediae are seldom observed in mother rediae dissected from snails maintained at 20 °C. Their production can, however, be stimulated by subjecting the snail host to starvation, to low, and to high temperature shocks. The parasite is susceptible to stress from immediately after infection for about 16 days, when maintained at 20 °C. In general, the more extreme the shock, the greater is daughter redial production. Increasing the length of the period of stress from 12 h up to 9 days does not increase the production of daughter rediae, nor does repeated on/off cold shocks or continuous maintenance at 10 °C. Daughter rediae develop more rapidly than cercariae and leave the mother rediae several days earlier. There is no evidence that presence of daughter rediae coincides with the suppression of cercarial production. The findings are discussed with reference to possible mechanisms by which parasite development might be controlled.

scholarly journals Picroilmenites in Yakutian kimberlites: variations and genetic models

Solid Earth ◽  
2014 ◽  
Vol 5 (2) ◽  
pp. 915-938 ◽  
Author(s):  
I. V. Ashchepkov ◽  
N. V. Alymova ◽  
A. M. Logvinova ◽  
N. V. Vladykin ◽  
S. S. Kuligin ◽  
...  
Keyword(s):  
High Temperature ◽  
Trace Element ◽  
Fractional Crystallization ◽  
Geochemical Modeling ◽  
Wall Rock ◽  
Primitive Mantle ◽  
Mantle Lithosphere ◽  
Partial Melts ◽  
Group 2 ◽  
Ree Patterns

Abstract. Major and trace element variations in picroilmenites from Late Devonian kimberlite pipes in Siberia reveal similarities within the region in general, but show individual features for ilmenites from different fields and pipes. Empirical ilmenite thermobarometry (Ashchepkov et al., 2010), as well as common methods of mantle thermobarometry and trace element geochemical modeling, shows long compositional trends for the ilmenites. These are a result of complex processes of polybaric fractionation of protokimberlite melts, accompanied by the interaction with mantle wall rocks and dissolution of previous wall rock and metasomatic associations. Evolution of the parental magmas for the picroilmenites was determined for the three distinct phases of kimberlite activity from Yubileynaya and nearby Aprelskaya pipes, showing heating and an increase of Fe# (Fe# = Fe / (Fe + Mg) a.u.) of mantle peridotite minerals from stage to stage and splitting of the magmatic system in the final stages. High-pressure (5.5–7.0 GPa) Cr-bearing Mg-rich ilmenites (group 1) reflect the conditions of high-temperature metasomatic rocks at the base of the mantle lithosphere. Trace element patterns are enriched to 0.1–10/relative to primitive mantle (PM) and have flattened, spoon-like or S- or W-shaped rare earth element (REE) patterns with Pb > 1. These result from melting and crystallization in melt-feeding channels in the base of the lithosphere, where high-temperature dunites, harzburgites and pyroxenites were formed. Cr-poor ilmenite megacrysts (group 2) trace the high-temperature path of protokimberlites developed as result of fractional crystallization and wall rock assimilation during the creation of the feeder systems prior to the main kimberlite eruption. Inflections in ilmenite compositional trends probably reflect the mantle layering and pulsing melt intrusion during melt migration within the channels. Group 2 ilmenites have inclined REE enriched patterns (10–100)/PM with La / Ybn ~ 10–25, similar to those derived from kimberlites, with high-field-strength elements (HFSE) peaks (typical megacrysts). A series of similar patterns results from polybaric Assimilation + fractional crystallization (AFC) crystallization of protokimberlite melts which also precipitated sulfides (Pb < 1) and mixed with partial melts from garnet peridotites. Relatively low-Ti ilmenites with high-Cr content (group 3) probably crystallized in the metasomatic front under the rising protokimberlite source and represent the product of crystallization of segregated partial melts from metasomatic rocks. Cr-rich ilmenites are typical of veins and veinlets in peridotites crystallized from highly contaminated magma intruded into wall rocks in different levels within the mantle columns. Ilmenites which have the highest trace element contents (1000/PM) have REE patterns similar to those of perovskites. Low Cr contents suggest relatively closed system fractionation which occurred from the base of the lithosphere up to the garnet–spinel transition, according to monomineral thermobarometry for Mir and Dachnaya pipes. Restricted trends were detected for ilmenites from Udachnaya and most other pipes from the Daldyn–Alakit fields and other regions (Nakyn, Upper Muna and Prianabarie), where ilmenite trends extend from the base of the lithosphere mainly up to 4.0 GPa. Interaction of the megacryst forming melts with the mantle lithosphere caused heating and HFSE metasomatism prior to kimberlite eruption.

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