... mixtures of di-alkyl ethers and 2-alkyl alkanols. These micro-heterogeneous solvents exhibit unique properties and are effective in solubilizing and removing organic asphaltenic hydrocarbon deposits from surfaces. The main applications of micro-heterogeneous solvents are in organic deposits removal from...

... is on paraffin inhibitors’ effectiveness in reducing paraffin deposition that is driven by thermal driving force between the bulk oil and the pipe wall. Inhibitor performance was measured by cold finger testing. Three different alpha olefin (short, medium and long) maleic anhydrides esterified with different...

.... In some operations chemical application is not fully effective due to under treating of the chemical or carbonate from the reservoir (fines) builds up within the heaters. In cases of reduced fluid throughput cleaning of the inorganic scale is required. The most common method of cleaning is to take...

... but are not effective for wells with high water cuts. These wells when treated with PI/PPD still require high cost maintenance such as the hot oil/water jobs and/or well workover. This paper presents a more effective treatment using tailored chemical mixtures to form a water dispersion with the paraffinic oil, thus...

... a bimodal size distribution, with a large fraction of small particles ( d 50 ~ 50 nm) and a smaller number of larger particles (d 50 ~ 200 nm). Such distribution is highly advantageous, because only the small particles (d 50 ~ 50 nm) are responsible for the seeding effect ( Kanchanason 2018...

..., the excellent fluid loss performance of the phosphate-modified FLA remained unaffected in the presence of AFS dispersant or ATBS-co-acrylic acid retarder, while the effectiveness of the conventional, non-phosphated FLA was severely impeded by these additives. Adsorption measurements illustrated...

... considerably lower dosages than AFS to achieve the same volume of fluid loss. For example, at 27 °C the addition of 0.1 % bwoc PCE to 0.4 % HEC improved the fluid loss from 250 mL/30 min to 50 mL/30 min. For the same effect, 0.4 % of AFS were needed. Most important, such low fluid loss values were achieved...

... and tracer data to identify long term souring patterns, the amount of H 2 S produced relative to injected water and to determine the effectiveness of the different mitigation strategies used in the field. The Gullfaks field in the Norwegian sector of the North Sea began production in 1985 and has been widely...

... frequent case) or, oppositely, in improved effectiveness. Here, an overview of some synergistic and antagonistic effects between selected cement additives is presented. Four combinations of additives were tested and studied. At first, interaction between CaATBS-co-NNDMA fluid loss additive (FLA...

... to its fluid loss performance in presence of sulfate, chloride and Welan gum and at high temperature (80°C). First, we found that CaATBS- co -NNDMA adsorbs in high amounts on both cement and silica flour. Its effectiveness relies exclusively on high adsorption onto these mineral surfaces. FLA adsorption...

... polymer enhanced recovery flow metering drag reduction production control Reservoir Surveillance drilling operation water droplet flow rate Effectiveness rotational speed dra concentration 100ppm mechanism torque production monitoring production logging Upstream Oil & Gas Efficiency...

... Abstract The synergetic effect of salinity and fluorochemicals on the alteration of wettability from water-wetting to intermediate gas-wetting is studied in this work. We find that NaCl salinity increases water-wetting when a core is saturated with brine. NaCl also reduces absolute gas...

... Abstract In the petroleum industry, water and oil emulsion formation presents an on-going production issue receiving considerable technical attention. Crude oil/water demulsification effectiveness has been tested using a new microemulsion-based demulsifier (ME-DeM) with an environmentally...

... Abstract Anionic polyacrylamide copolymer friction (or drag) reducers are commonly used in various well stimulation jobs. The effectiveness of friction reduction polymers strongly depends on the compatibility between friction reducing polymers and stimulation liquid to which they are added...

... down and oxygen control was done with chemical oxygen scavenger only. With this different mode of operation, the effectiveness of the nitrate as souring mitigation method was expected to be affected. Additional laboratory experiments, also reported in this paper, were performed and did not indicate any...

..., and THPS, an oilfield biocide, act synergistically to effectively control the H 2 S biogeneration in this environment. The combined chemical treatment strategy has now been implemented successfully on six Petrobras FPSOs. Flexibility has been important in developing the treatment programs since operating...

... production. Therefore, it is highly desirable to add an effective ZnS scale inhibitor directly to ZnBr 2 brines before scaling can occur downhole. While scale inhibition methods for sulfates and carbonates in production equipment and reservoirs have been extensively studied, only limited literature...

... demonstrated in a slickwater fracturing fluid field trial. Here, excellent microbiological control was maintained cost-effectively with relatively low biocide residuals. br 2 enhanced recovery chlorine concentration chemistry ppm waterflooding hypohalous acid microbiological control proppant...

... 2 ), etc. Selection of salts or brines is primarily based on the required properties of weighted acids and cost effectiveness. There are many publications related to corrosion and inhibition in acids; however, regarding corrosion behavior of weighted acids on tubular materials, relatively little...

... concentration chemical structure hydrate formation feeding rate agent experiment thermodynamic inhibitor scale inhibition mol plc apparatus compound gas hydrate formation effectiveness hydrate inhibition hydrate remediation remediation of hydrates society production chemistry scale remediation...