A Semi-Empirical Carbonate Acidizing Model for Chelating-Agent-Based Fluids

2016 ◽  
Author(s):  
Vikesh Singh Baghel ◽  
Jag Pravesh
Keyword(s):  
Chelating Agent ◽  
Agent Based ◽  
Carbonate Acidizing ◽  
Semi Empirical

Synthesis, preclinical evaluation and molecular modelling of macrocyclic appended 1-(2-methoxyphenyl)piperazine for 5-HT1A neuroreceptor imaging

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7288-7301 ◽  
Author(s):  
Puja Panwar Hazari ◽  
Surbhi Prakash ◽  
Virendra Kumar Meena ◽  
Niraj Singh ◽  
Krishna Chuttani ◽  
...  
Keyword(s):  
Molecular Modelling ◽  
Chelating Agent ◽  
Agent Based ◽  
Preclinical Evaluation ◽  
Efficient Approach ◽  
Design And Synthesis ◽  
Neuroreceptor Imaging

An efficient approach in the design and synthesis of a multi-functional chelating agent based on 1-(2-methoxyphenyl)piperazine for targeting 5-HT1A receptors in brain was envisaged.

ChemInform Abstract: Synthesis of a Novel Hexadentate Chelating Agent Based on 8-Hydroxyquinoline.

ChemInform ◽  
1988 ◽  
Vol 19 (32) ◽  
Author(s):  
W. D. SHRADER ◽  
J. CELEBUSKI ◽  
S. J. KLINE ◽  
D. JOHNSON
Keyword(s):  
Chelating Agent ◽  
Agent Based

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

scholarly journals Synthetic Amphoteric Cryogels as an Antidote against Acute Heavy Metal Poisoning

Molecules ◽  
2021 ◽  
Vol 26 (24) ◽  
pp. 7601
Author(s):  
Alzhan Z. Baimenov ◽  
Ildar R. Fakhradiyev ◽  
Dmitriy A. Berillo ◽  
Timur Saliev ◽  
Sergey V. Mikhalovsky ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Morphological Structure ◽  
Chelating Agent ◽  
Acute Poisoning ◽  
Control Group ◽  
High Survival ◽  
Agent Based ◽  
In Vivo Experiments ◽  
Acid Sodium Salt

The effectiveness of an amphoteric cryogel (AAC) as an oral sorbent (enerosorbent) for the treatment of acute poisoning of small animals (rats) with heavy metals (HMs) was studied in in vivo experiments. The morphological structure of the cryogel was examined using scanning electron microscopy/energy-dispersive X-ray analysis and confocal microscopy. The use of the cryogel in the treatment of rats administered an LD50 dose of Cd(NO3)2, CsNO3, Sr(NO3)2, or HgCl2 in aqueous solution showed their high survival rate compared to the control group, which did not receive such treatment. The histological and chemical analysis of internal tissues and the biochemical analysis of the blood of the experimental animals showed the effectiveness of the cryogel in protecting the animals against the damaging effect of HMs on the organism comparable with unithiol, a chelating agent based on 2,3-dimercapto-1-propane sulfonic acid sodium salt (DMPS) approved for the treatment of acute poisoning with some heavy metals.

The Efficacy of a Chelating Agent-Based Oxide Remover to Clean Corrosion Products from Ferrous Fracture Surfaces

2019 ◽  
Vol 19 (6) ◽  
pp. 1860-1865
Author(s):  
Aphrodite Strifas ◽  
Michael K. Budinski ◽  
Edward Komarnicki ◽  
Nancy B. McAtee ◽  
Matthew Fox ◽  
...  
Keyword(s):  
Chelating Agent ◽  
Corrosion Products ◽  
Agent Based ◽  
Fracture Surfaces

scholarly journals Development of Chelating Agent-Based Polymeric Gel System for Hydraulic Fracturing

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1663 ◽  
Author(s):  
Muhammad Kamal ◽  
Marwan Mohammed ◽  
Mohamed Mahmoud ◽  
Salaheldin Elkatatny
Keyword(s):  
Hydraulic Fracturing ◽  
Sea Water ◽  
Chelating Agent ◽  
Gelling Agent ◽  
Fracturing Fluid ◽  
Fluid System ◽  
Agent Based ◽  
Breaking Time ◽  
Glutamic Acid Diacetic Acid ◽  
High Shearing

Hydraulic Fracturing is considered to be one of the most important stimulation methods. Hydraulic Fracturing is carried out by inducing fractures in the formation to create conductive pathways for the flow of hydrocarbon. The pathways are kept open either by using proppant or by etching the fracture surface using acids. A typical fracturing fluid usually consists of a gelling agent (polymers), cross-linkers, buffers, clay stabilizers, gel stabilizers, biocide, surfactants, and breakers mixed with fresh water. The numerous additives are used to prevent damage resulting from such operations, or better yet, enhancing it beyond just the aim of a fracturing operation. This study introduces a new smart fracturing fluid system that can be either used for proppant fracturing (high pH) or acid fracturing (low pH) operations in sandstone formations. The fluid system consists of glutamic acid diacetic acid (GLDA) that can replace several additives, such as cross-linker, breaker, biocide, and clay stabilizer. GLDA is also a surface-active fluid that will reduce the interfacial tension eliminating the water-blockage effect. GLDA is compatible and stable with sea water, which is advantageous over the typical fracturing fluid. It is also stable in high temperature reservoirs (up to 300 °F) and it is also environmentally friendly and readily biodegradable. The new fracturing fluid formulation can withstand up to 300 °F of formation temperature and is stable for about 6 h under high shearing rates (511 s−1). The new fracturing fluid formulation breaks on its own and the delay time or the breaking time can be controlled with the concentrations of the constituents of the fluid (GLDA or polymer). Coreflooding experiments were conducted using Scioto and Berea sandstone cores to evaluate the effectiveness of the developed fluid. The flooding experiments were in reasonable conformance with the rheological properties of the developed fluid regarding the thickening and breaking time, as well as yielding high return permeability.

Mitigation of High Temperature Challenges in Limestone Acidizing through the use of Chelating Agents

2021 ◽  
Author(s):  
Mandeep Khan ◽  
Mohammed Qamruzzaman ◽  
Dhirendra Chandra Roy ◽  
Ravi Raman
Keyword(s):  
High Temperature ◽  
Chelating Agents ◽  
Elevated Temperatures ◽  
Chelating Agent ◽  
Point Of View ◽  
Core Flooding ◽  
Agent Based ◽  
Asphaltene Deposition ◽  
Wide Ph Range ◽  
Ph Range

Abstract Acid jobs with conventional acid systems like hydrochloric acid in high temperature conditions is challenging on various fronts. Enhanced reactivity of strong acids results in poor penetration and severe face dissolution. Also, it aggravates the issue of corrosion of downhole equipment and may also result in sludge formation/asphaltene deposition. Worldwide, chelating agents has emerged as a standalone stimulation fluid for high temperature acidizing. Their unique attributes and properties have been proved very useful for acid jobs at elevated temperatures. However, the chelating agents-based formulations need to be carefully evaluated on various acidization parameters for a fruitful stimulation. Mumbai Offshore field has been encountering the above-mentioned problems in acidizing of its high temperature (>275°F) limestone reservoirs. The paper presents innovative solutions devised for high temperature matrix acidizing. Two chelating agents viz., EDTA (Ethylenediaminetetraceticacid) and GLDA (L-Glutamic Acid N, N-diacetic acid) were explored and evaluated with meticulous laboratory studies. The performance of the chelating agent-based stimulation fluid was compared with acetic acid. Slurry tests were performed to quantify the dissolving power of each acid. Consequently, core flooding tests were carried out to to find the optimum pH of the chelating agents from stimulation point of view. Core flooding studies were performed at anticipated injection rates on representative core samples from a payzone A, with BHT 275-290° F, from Mumbai Offshore. pH optimized formulations were tested against N-80 metallurgy coupons at reservoir temperature for corrosion potential estimation. Also, sludge, asphaltene and emulsion formation tendencies were analyzed with representative oil samples. The results convey that both EDTA and GLDA were able to mitigate the challenges encountered at elevated temperatures. EDTA and GLDA were found to stimulate the cores with wormholes formed at wide pH range with no face dissolution observed. Chelating agents enjoyed good dissolving power with negligible corrosion rates, absence of sludge and asphaltene deposition, compatibility with formation fluid and excellent iron control properties.

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