... management, and strategic targeting of onsite scale mitigation resources. Target field producers exhibited 0.2% to 25% watercut and presented different degrees of scale precipitation at and/or downstream of the WHCVs. Following well scaling potential assessment, each producer was subject to a series...

... laboratory evaluation drillstem/well testing drillstem testing asset and portfolio management co 2 mmp precipitation Introduction CO 2 as an EOR injectant is very efficient and has been successfully applied in many fields in the world due to its lower miscibility pressure, better solvent...

... Abstract Quality of water used for injection is a very essential factor in preventing/minimizing formation damage potential due to scale precipitation. Various components in produced water such as H 2 S, suspended solids, bacteria and other metal ions such as iron are the primary cause...

... is however not completely clear and may contribute to the worsening of the phenomenon: even a time of some hours to very few days may enough for the solid plug to grow inside the tubing. It was noted that, in particular conditions, precipitation of solid sulfur may occur at surface facilities ( Pack 2012...

... obtained with more conventional tests: blending stability analysis by light scattering and various screening methods. The flow rig mimics the process conditions (elevated pressure, high temperature, flow-induced shear) and identifies whether deposition or precipitation will occur. The former can cause...

... S can occur 11 ; on the contrary for H 2 CO 3 and CH 3 COOH that enhanced the corrosion rate only via a buffer effect 12 , 13 . Precipitation of corrosion products comes in a second step when the limit of solubility is reached ( Eq. 6 and Eq. 7 ). corrosion inhibition oilfield...

... formation. This was recognized as a benign form of "sulfate attack": The precipitation of secondary ettringite within the cement matrix results in expansion and thus debonding across the stiff anhydrite, whereas creeping salt pushes cement back on the casing. Lead cement densification was also observed near...

... and loss of production. Several technologies are used to reduce sand production effects and subsequently maintain well production and safe operations. Such techniques include completion techniques, and in-situ chemical consolidation methods. The enzyme urease induced carbonate precipitation (EICP...

... remediation water management hydrate remediation hydrate inhibition upstream oil & gas remediation of hydrates inhibitor scale precipitation scale formation scenario precipitation upper burgan formation production rate injection differential pressure asphaltene inhibition concentration...

... production degradation, a salt resistance model is introduced in the WDPT plug-in. For each well, a set of salt model parameters are conditioned using a Salt Tuning App to match the observed flowrate. Introducing a Bottom Hole Pressure (BHP) threshold in the salt model improves the salt precipitation...

... on equipment for processing and transportation of crude was observed after EOR polymer breaking through to producing wells of the Aishwarya field. The objective of the study included analyzing polymer containing deposits, concluding on mechanism of precipitation and developing the solution for fouling control...

...) are utilized to clean scale remnants on the coiled tubing to provide a clean environment for the next experiment. As a result of this high temperature accompanied by the high volume of scale inhibitor, the molar ratio between M 2+ and phosphonates will increase and cause precipitation of calcium...

... based on an asphaltene study performed on downhole samples. scale remediation Production Chemistry flow assurance oilfield chemistry scale inhibition Upstream Oil & Gas paraffin remediation Hydrate Remediation hydrate inhibition precipitation Asphaltene Precipitation deferment...

... of all processes and prevents the precipitation that could affect the performance of alkaline-foam EOR process. We proposed a new procedure to avoid this surfactant precipitation by injecting an LS water slug in between alkaline and foam flooding. waterflooding Upstream Oil & Gas pressure...

... that the reduced sulfate SIW was found to be compatible, and no sign of precipitatation was observed. Untreated SIW showed white precipitates of calcium sulfate when mixed with the high calcium synthetic simulated production water (SPW) at different ratios and temperature. Coreflooding formation damage assessment...

.../hardness of the brines. Sulfide scales have extremely low solubilities (see Table 1 ) and thus their precipitation is virtually inevitable under conditions often encountered in oilfield systems. The solubility of FeS, ZnS and PbS increases with increasing salinity and decreases with increasing pH...

... (HCl). In many conventional mud acid treatments, after an initially good response to the treatment, the production falls to levels similar to those before the treatment; this is thought to be due to the precipitation from the reaction of HF with silica material on feldspar/clay, which results in more...

... Abstract Surfactin is an anionic surfactant generated by bacteria. Although it has high ability to decrease interfacial tension (IFT) between oil and water, it binds with bivalent cations and forms precipitation. Because the precipitation causes the significant reduction of reservoir...

.... In this paper, the importance of biological/microbial mechanisms towards the impact on the storage capacity was studied using reactive transport modelling. The results obtained shows that the presence of microbial compound such as organic matter contributes to the enhancement of mineral precipitation, resulting...

... 4 ( s ) As low-salinity water is injected, the chemical equilibrium is broken, resulting in the dissolution of Ca 2+ from calcite and anhydrite (CaSO 4 ) precipitation, which cause a permeability change. Then, the oil attached on the rock surface can be released, in which the wettability...