..., barium sulfate can precipitate and deposit with the reduction of pressure and/or temperature ( Todd and Yuan, 1992 ; Vu et al., 1999 ). In addition to pressure and temperature change, also the salinity has an impact on the solubility of barium sulfate which was firstly reported by Templeton at high...

... remediation deposit reaction wang thp deposition international symposium mineral wax inhibition paraffin remediation sulfide corrosion scale control aberdeen particle bacteria Introduction Abstract Iron sulfide (FeS) scale is a well-known troublesome solid during oil and gas...

... Magnesian calcite has been identified as the main constituent of solids fouling several bp facilities in the North Sea and Azerbaijan and in partner operations in other locations. These solids were, for many years, thought to be calcite scale for a number of reasons. The deposits formed compacted solids...

.... Recently barium sulphate scale deposits have been collected in some wells. This study will determine the cause of both calcium carbonate and barium sulphate scales and establish the required scale mitigation. The analysis of the evolution with time of the production water chemistry, the determination...

..., flowback practices, etc. Finding the most likely cause was primarily about determining how a stream had been created in the facilities containing elevated concentrations of calcium and the phosphonate inhibitor that would then be preferentially deposited in the heat exchanger due to its high skin...

... Abstract A pilot-scale test system has been developed to evaluate scale deposition and inhibition under flow conditions that are more representative of the field than conventional laboratory methods. This system has been used to investigate an example of strontium sulphate scaling...

... The Step 1 of Test 2 provides a reference valve for the benchmark, detailing the movable and fixed parts, as shown in the reference valve of Figure 6 . The simulation parameters explain how to configure the injection surface and create the deposit layer, specifying important parameters...

... due to the thermal degradation of polymeric scale inhibitors followed by poor retention properties. To this date, identifying a squeezable scale inhibitor for sulphide scale deposition that compiles with these conditions is an ongoing research topic. A thermally stable Polyaniline-Co-Polymer based...

.... As more sour production is brought on-stream iron sulfide continues to become more prevalent. There are few options for removing deposits of iron sulfide scales especially when it comes to choice of chemistry. This paper discusses the most commonly performed techniques for iron sulfide removal, including...

... for production increase, etc., other than tubular corrosion failure ( Al-Tammar et al, 2014 ). Abstract Scale formation has been a persistent challenge in many sour gas wells producing from one of the world's largest gas reservoir in Saudi Arabia. Accumulation of scale deposits on downhole tubular...

...Introduction Oilfield scale formation and control The precipitation of insoluble mineral scale deposits (scaling) is a common cause of near wellbore formation damage during the production of hydrocarbons and associated produced water. Precipitation of scale can occur within the formation...

... Abstract Water flooding is the hinge pin for Gemsa Oil Field. Water injection is supplied from shallow water supply wells. Compatibility tests had indicated probable deposition of calcium sulphate scale on surface and subsurface production equipment. Calcium sulphate scale has been recognized...

... Abstract For over a decade, being able to accurately predict the risk of calcium naphthenate deposition has been one of the goals of production chemistry studies for development of new fields. In order to fulfill this challenge, many studies have been performed both within the company...

..., but temporary, surges in production that fell off again soon after. By comparing the well performance with other wells having the same downhole completion type, attention was soon focused on the likelihood of in-situ CaCO 3 scale deposition. The subsequent discovery of CaCO 3 deposition in the near wellbore...

... inhibition deposit well integrity asphaltene remediation remediation of hydrates scale inhibition upstream oil & gas asphaltene inhibition selection pipeline corrosion production chemistry subsurface corrosion scale dissolver hydrate remediation dissolution flowline corrosion scale...

...Silica/silicate Scaling in Co-generation Heat Exchanger Tubes In the co-generation system of the present study, amorphous silica and metal silicates have also deposited due to increasing concentrations of silica from dissolution cycles in the reservoir. At this location, boiler water...

... (a) the partition coefficient of the naphthenic acid, HA, between the oil and the water phases, K ow ; (b) the pK a of the naphthenic acid in water; and (c) the solubility product, K CaA2 (or other similar solubility parameter), of the naphthenate deposit. In the simpler pH change experiments, we only require...

... Abstract Organic field deposits from distinct geographical regions were analysed using a wide range of analytical techniques, viz . for cation composition (EDAX), diffraction patterns (XRD), thermal profiling (DSC/TGA), naphthenic acid distribution using electrospray mass spectrometry (ESMS...

... with relatively indirect assessments often indicating fluid compatibility issues rather than identification of naphthenate deposits. Recent work examining both current calcium naphthenate problems in existing facilities and the technical requirement to predict the potential for naphthenate deposits in new fields...

... Abstract Calcium naphthenate deposition is among the most challenging obstacles to high production regularity for oilfields where acidic crude oils are produced. Until now it has generally been acknowledged that the deposit is made up of calcium soaps of the naphthenic acids in the crude oil...