... linearly from 0 to −1.4 V for gold sensors and from 0 to −1.2 V for platinum sensors at a scan rate of 20 mV s −1 . Electrochemically assisted deposition of CaCO₃ Before using the gold and platinum sensors, they were subsequently rinsed with Milli-Q, ethanol, isopropanol, Milli-Q...

... upstream oil & gas concentration ultra-low dose asphaltene inhibitor paraffin remediation enhanced recovery oilfield chemistry scale inhibition deposition glp-u asphaltene hydrogen asph-1 petroleum engineer application biosurfactant interaction different concentration dbsa...

... Figure 2 Typical pressure data . t IP , initial precipitation time, t deposition , bridged plug or deposition time, t blo/block , complete tube blockage are shown, BL, base line are indicated. To differentiate bulk precipitation from deposition, we selected various base baseline...

... Abstract Metal sulfide scaling issue in the oil and gas production continue to present significant flow assurance challenge. Recently, a novel polymeric chemistry that can effectively control FeS scale deposition in oil and gas production system was reported. However, how to manage finely...

... chemistry fluid loss control asphaltene inhibition concentration application shear stress petroleum engineer drilling fluid formulation remediation of hydrates inhibitor asphaltene remediation upstream oil & gas deposition viscosity reduction crude sample shear rate crude oil different...

... Abstract Miscible gas injection has become the most used enhanced oil recovery (EOR) method in the oil and gas industry. The deposition and precipitation of aspahltene during the gas injection process is one of the problems during the oil production process. The asphaltene can deposit and plug...

... be somewhat different and significantly worse with EOR. These issues include scale deposition, corrosion, reservoir souring, injectivity decline and, if injection occurs under fracturing conditions, issues associated with this decline (fracturing out of zone, by-passed oil). There is a huge body of work...

... Crystallization and deposition of paraffin wax cause many production problems in the oilfield ranging from clogging reservoir flow routes resulting in premature abandonment of reserves to increasing maintenance requirements of pump jacks, sucker rods, tubing, flowlines, and oil-water-gas...

...Experimental Section Samples of wax from downhole and flowline wells were provided by various operators in North America. A list of the field wax deposits screened in this study are given in Table 1 . From Figure 3 , see that the x-axis is the tube length; as it lies on its side, read...

... correctly to carbonate scale formation. paraffin remediation wax inhibition asphaltene remediation scale remediation Production Chemistry remediation of hydrates Upstream Oil & Gas deposition calculation caco 3 carbonate scale prediction wax remediation oilfield chemistry scale...

... of asphaltenes precipitation and deposition. We highlight key parameters that should be optimised to ensure that chemical performance is tested against the actual functionality required in the field and under conditions that are as representative as practicable. We present a case study describing the use...

... integrity and reliability degradation, and fouling of device and equipment. The mitigation and remediation of oilfield depositions can be difficult and costly. Better understanding of the key factors impacting scale dissolution, such as temperature and pH will benefit scale mitigation practices. Most...

... Abstract Asphaltene deposition and plugging of pipelines during oil production and transportation is considered a challenging flow assurance issue. Instead of adding dispersants, the concept proposes to remove asphaltenes from the flow stream by means of electro–deposition prior...

... Abstract A major shale producer in North America with established oil and gas production was facing challenges with severe paraffin deposition in downhole tubing and flowlines. Since chemical recommendations based on traditional screenings failed to deliver adequate inhibition, the operator...

... Abstract Recent studies revealed that solids from lab-generated deposits often exhibit compositional differences from those of field deposits, pointing to a more complex fouling process in field operations. The objective of this work was to understand and apply knowledge from field deposit...

... can prevent iron sulfide scale deposition at threshold quantities. Specifically, this novel chemistry showed partial iron sulfide nucleation inhibition at early stages and growth inhibition (as high as two orders of magnitude) later. This significant growth inhibition of iron sulfide resulted...

... Abstract Scale deposition in surface and subsurface production equipment is one of the major operational problems encountered during oil production, which results in equipment corrosion, wellbore plugging, production rate decline, and requires frequent squeeze treatments. Oil field scales...

... sulfide scale deposition at threshold quantities. Specifically, the polymer did not inhibit the formation of the FeS, ZnS and PbS particles; however, it significantly influenced the growth and deposition behaviors by dispersing nano-particulates for an extended period of time. The thermal stability test...

... performance. A test system has been developed that allows routine laboratory evaluation of scale and corrosion processes at moderate to high shear stresses using a jet impingement method. A series of tests has been conducted to determine the extent of scale deposition and corrosion observed with a mild...

... can reduce oil production efficiency and may cause further corrosion to tubulars. To tackle FeS problems, it is essential to understand how FeS precipitates and deposits under various operation conditions. In this study, we developed a strictly anoxic plug flow reactor to study FeS precipitation...