pH-mediated interfacial chemistry and particle interactions in aqueous chlorite dispersions

Tan, Hui; Skinner, William; Addai‐Mensah, Jonas

doi:10.1016/j.cherd.2012.08.011

Cited by 14 publications

(2 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Commonly, a large portion of the scales is dissolvable in either water or corrosive, while a few scales do not show their solvency in water or acids. For example, the NaCl scale shows solubility in the water, while CaCO 3 , FeS, FeO are soluble in acid [52,53]. This type of scale is generally formed in sour oil and gas wells.…”

Section: Types Of Scalesmentioning

confidence: 99%

A Review of Green Scale Inhibitors: Process, Types, Mechanism and Properties

Mazumder

2020

Coatings

View full text Add to dashboard Cite

In the present time, more often, it has been seen that scaling has grown as widely and caused problems in the oilfield industry. Scaling is the deposition of various salts of inorganic/organic materials due to the supersaturation of salt-water mixtures. Many works have been proposed by researchers using different methods to solve the problem, of which scale inhibition is one of them. The scale inhibitors, particularly for antiscaling, have derived from natural and synthetic polymers. Among different polymers, inorganic and organic compounds (polyphosphates, carboxylic acid, ethylenediaminetetraacetic acid (EDTA), etc.) can effectively manage the oilfield scales of which many are toxic and expansive. Scale inhibitors of alkaline earth metal carbonate and sulfates and transition metal sulfide are commonly used in oilfield applications. Scale inhibition of metallic surfaces is an essential activity in technical, environmental, economic, and safety purposes. Scale inhibitors containing phosphorus appear to have significant achievements in the inhibition process despite its toxicity. However, phosphorus-based inhibitors can serve as supplements prompting eutrification difficulties. Besides these increasing environmental concerns, green scale inhibitors are renewable, biodegradable, and ecologically acceptable that has been used to prevent, control, and retard the formation of scale. Considering the facts, this review article summarized the concept of scale, various green scale inhibitors, types, mechanisms, comparative performance, significance, and future aspects of green scale inhibitors, which will shed light and be helpful for the professionals working in the oil and gas industries.

show abstract

Section: Types Of Scalesmentioning

confidence: 99%

A Review of Green Scale Inhibitors: Process, Types, Mechanism and Properties

Mazumder

2020

Coatings

View full text Add to dashboard Cite

show abstract

“…Several studies confirmed that iron is most effective cation that is responsible on balancing the negative charge of chlorite surface (Tan et al 2012;Jones 1981). The overall charge of chlorite is a function of; (1) the charge distribution of both surface (face-edge), (2) pH of the aqueous media and (3) the existent number of cations, such as Si, Fe, and Al.…”

Section: Introductionmentioning

confidence: 99%

Defining the Optimum Properties of Chelating Agents to be used as EOR Fluid for Sandstone Reservoirs

Attia

Mahmoud

2015

All Days

View full text Add to dashboard Cite

Many laboratory core flood investigations proved the increase in the oil recovery by applying low salinity water. However, till now the main mechanism of the oil recovery is debated. Recently chelating agents have been proposed as chemical enhanced oil recovery fluids that can be used along with the sea water to recover oil from sandstone and carbonate reservoirs. Chelating agents have the ability to decrease the salinity of the injected water and increase the recovery better than low salinity water flooding with low cost compared to diluting the sea water.In this paper we will define the optimum pH, concentration, and type of the chelating agent by conducting series of core flooding experiments. First, we changed the pH of chelating agent between 10.7 and 12.2 and the oil recovery was determined for each experiment. Second, the optimum concentration was identified by changing the concentration of the injected fluid and comparison of the recovered oil achieved for each experiment was conducted. Finally, the best chelating agent was selected by comparing between the oil achieved by two different types.The results showed that high oil recovery up to 30% of the original oil in place was achieved by EDTA chelating agent diluted from an initial concentration of 40 wt% using raw sea water has the same composition of Arabian Gulf sea water. The optimum pH value should be greater than 12. In addition, a concentration of 5wt% or greater should be used. EDTA-based chelating agents yielded higher recovery compared to HEDTA-based chelating agents.

show abstract