... Abstract Sulfide and carbonate mixed scales are ubiquitous in oilfield production and injection system with low corrosion resistant carbon steel equipment and pipeline. Previously, such conditions were generally treated as a corrosion problem rather than a scale problem, and the interactions...

... Abstract Carbon capture, utilization, and storage (CCUS) represents one of the key contributors to decarbonization. CCUS hubs that take gases from industrial systems as chemical, power, gas producers, and oil refineries have become the energy industry’s preferred way to combat climate warming...

... Abstract The formation of calcium carbonate scale within produced brine as it passes through topside heaters is a very common flow assurance challenge. Normally this scale risk is predicted and chemically controlled via scale inhibitors deployed upstream of the point of brine supersaturation...

... with the presence and/or development of H 2 S in reservoirs containing carbonates: higher H 2 S concentration reflects in higher calcium carbonate scaling potential. The intention of this work is to demonstrate the impact of H 2 S using a real field case scenario and investigate how the variability in water cut...

... waterflooding Performance Comparison experiment wettability alteration Babadagli anionic surfactant chemical agent carbonate novel chemical agent Oil Recovery imbibition spontaneous imbibition tight sand cationic surfactant surfactant reservoir molar ratio Introduction Spontaneous...

... alkali, noting that it has a much lower molecular weight than sodium carbonate or even caustic (which gives it a large advantage in mass efficiency if it is transported and injected as anhydrous gas), and still gave excellent ASP performance. It gives a similar pH to carbonate (around 11 versus 10 – 11...

... Abstract The success of carbonate acidizing depends on the selection of proper fluid recipes, reservoir formation parameters, job design, and execution. Analysis of flowback spent acid will improve the acidizing process in future treatments, enhance the designed recipes and treatment design...

... in the core model. Abstract Recent times have seen an advancement in the area of carbonate acidizing, moving forward from single-phase to two-phase analyses, in an effort to account for the presence of the oil-phase during stimulation treatments. Yet, a lack of a complete capability to understand...

... Abstract Calcium carbonate is the most common scales in oilfield and thus has been heavily studied. However, calcium carbonate scale problems continue to occur in oilfield causing significant economic loss. To better control carbonate scale, reliable models on carbonate scaling risk...

... Abstract Unlike other types of inorganic scales, carbonate and sulphide scales are directly correlated to the in-situ concentration of acid gases such as CO 2 and H 2 S, which influence the local pH and availability of reactive species. The common approach to sulphide and carbonate scale...

... modeling scale inhibitor application retention reservoir injection water enhanced recovery concentration composition carbonate formation water chemical flooding methods phosphonate precipitation formation damage test condition compatibility detpmp Introduction The Alkali Surfactant...

... xanthan carbonate diutan viscosity suspension application reaction molecular weight solubility scleroglucan slurry hydration organic carbonate activation Introduction Almost all wellbore operations, starting from the drilling phase through the completions, stimulation, workover...

... slurry cement property upstream oil & gas polysaccharide slurry casing and cementing viscosity hec organic carbonate activation rheology cement formulation viscosification reaction ethylene carbonate molecular weight biopolymer carbonate elevated temperature unmodified hec spe...

... conditions in actual producing wells). This study proposes novel applications of straightforward chemistry to synthesize calcium carbonate particles that damage the porosity of clean sandstone cores (in core flow tests); the study includes reactions carried out under controlled conditions as well as within...

... is to determine the effects, advantages, and practicalities of using low salinity waterflood to displace more oil in both carbonates and clastic formations. Another objective is to understand the main mechanisms in low salinity waterflood, and to determine the effects of salinity level on oil recovery...

... Abstract This paper describes new research into the role and importance of the carbonate/bicarbonate pH-buffer added to formate based well construction fluids along with a newly developed field method for determining buffer concentrations. For many years it has been recommended practice...

... stabilizer in the lean MEG will be present mainly as carbonate and the pH is >10. After mixing with the well fluids the pH will be reduced to ~7. At the subsea mixing point the carbonate will react with CO 2 gas and produce bicarbonate. This process could not be simulated with the DTB equipment since...

... Abstract Contrary to sandstone reservoirs, 90% of carbonate oil reservoirs are characterized as neutral to preferential oil-wet. It is documented that the water wetting nature increases as the temperature increases, which is opposite to the behavior of sandstone reservoirs. The content...

... completion brine brine drilling fluid chemistry drilling fluid property concentration 0 drilling fluids and materials aqueous solution enhanced recovery surfactant sodium carbonate effect potassium formate oilfield chemistry solution chloride production chemistry formate temperature fluid...

... which identify conditions for thermal decomposition of the formate ion and conditions for significant corrosion of oilfield tubulars at typical downhole conditions. Conditions for hydrogen gas generation, carbon monoxide gas formation, scale formation and corrosion potential are described. Understanding...