Egyptian Journal of Petroleum最新文献

In oil production companies, corrosion is a common issue with various adverse economic and environmental consequences. Active well production fluid always comprises inherently corrosive and highly corrosive substances. There are a variety of treatment techniques to prohibit corrosion, such as chemical treatment, cathodic protection, and paint-based corrosion inhibitors. El Hamra Oil Company produces crude oil from three main locations. The research group noticed several downhole localized corrosion problems in the artificial lift system. This paper presents a case study to quantify the extra operation cost of periodically replacing the entire tubing string, renting the pulling unit, and production deferring. The research quantifies the economic impacts after corrosion inhibitor is injected downhole using the carrier line technique (CLT). The results show that the company saved more than 672 K $ during three years of using downhole chemical treatment; dramatically decreasing the regular corrosion incidents in three active wells. The actual profits are expected to increase exponentially for the following years, meanwhile reducing the environmental impacts to meet Egypt’s strategy towards sustainable goals in 2030.

Acidizing, which is essential in crude oil wells, improves oil/gas flow by injecting acid chemicals. HCl is frequently used to increase production. Add inhibitor chemicals to reduce acid stimulation and metal corrosion. Oil and gas well corrosion is successfully inhibited by amphiphilic amino pyridine derivatives. In this study, three cationic amphiphilic amino pyridine derivative inhibitors were synthesized and evaluated by FT-IR and 1H NMR analysis. These inhibitors exhibit cost-effective, eco-friendly, and highly effective inhibition reactivity for corrosion prevention. The surface activity was evaluated at 25⁰,40⁰ and 60 °C in 1 mol HCl, where CMC values increase and surface tension decreases as temperature increases. The corrosion inhibition efficacy (%η_w) was determined using gravimetric methods at various temperatures of 25⁰,55⁰, and 70 °C which revealed that SAHBR has a higher efficacy (94.5% at 25 °C, 92.3% at 55 °C and 91.1% at 70 °C) than SADBR (92.9% at 25 °C, 90.5% at 55 °C and 88.4% at 70 °C) and SAOBR (91.6% at 25 °C, 89.7% at 55 °C and 87.0% at 70 °C) for 400 ppm dose. Also, the inhibition efficacy (%η_p) which determined through potentiodynamic polarization technique which display SAHBR is 95.90% higher than SADBR is 93.90% and SAOBR is 89.90% at 25 °C for 400 ppm dose and electrochemical impedance spectroscopy (EIS) practice which parade the inhibition efficacy (%η_E) of the synthesized inhibitors where SAHBR is 91.7% higher than SADBR is 89.0% and SAOBR is 87.3% at 25 °C for 400 ppm dose. Density Functional Theory (DFT) computed quantum chemistry parameters using B3LYP level, 6-311G+ (d, p) basis sets. Calculations included EHOMO, ELUMO energies, energy gap (ΔE), softness (σ), chemical hardness (η), electrophilicity (ω), electronegativity (X), and electron transfer (ΔN) to validate amphiphilic inhibitors' inhibition properties. Molecular Dynamics Simulation (MDS) ensured system equilibrium.

Colored wastewater discharge from several industries, including paper, cosmetics, leather, dying, and textile industries, is a significant environmental management issue, especially in developing countries. Copolymerization of acrylic acid (AAc) as well as gelatin (Gltn) was performed in different compositions and crosslinked utilizing gamma irradiation to form Gltn/AAc hydrogel. EDTA has modified the hydrogel to improve adsorption properties. The effect of irradiation dose, the composition of Gltn-AAc, EDTA content, and AAc content on gel percentage was studied. The swelling behavior were studied as a time function. The prepared hydrogels’ surface morphologies and structure were confirmed with FTIR, SEM, as well as XRD. Modified hydrogel used in batch adsorption was studied to remove anionic and cationic dyes, namely methyl orange (MO) and methylene blue (MB), from simulated wastewater. The parameters of adsorption, like pH, time, and initial metals concentration, were studied. The removal of MB dye by modified Gltn/AAc/EDTA hydrogel was found to be greater than that of MO dye.

Amine processes are the advanced technology available today for the removal of carbon dioxide (CO₂) and hydrogen sulfide (H₂S) acid gases. Methyldiethanolamine (MDEA) is a well-known tertiary amine used selectively for the removal of carbon dioxide from natural gas. There are many parameters that can affect the efficiency of separating these acid gases from natural gas. In this paper, we have studied, modeled, and optimized different operating parameters of sour gas feed and MDEA solution which affect the CO₂ recovery efficiency from an existing sweetening unit. These operating parameters are the sour gas feed temperature and pressure, volume ratio (%) of carbon dioxide in the feed gas, amine inlet temperature, and amine circulation rate. Actual data were collected from an industrial CO₂ sweetening unit over one year. These data were used to study the effect of the studied operating parameters on the recovery efficiency of CO₂ from the sweetening unit. All studied operating parameters were found to have an impact on the recovery efficiency of the removed gases. A response surface methodology approach was used in Design-Expert software version 13 to model the relationship between considered operating parameters and CO₂ recovery efficiency. In addition, Design Expert numerical optimization has been used to maximize CO₂ recovery efficiency. The results showed that the optimal range of sour gas feed temperature is 34.71 to 45.56 °C, sour gas feed pressure is 8.32 to 10.04 barg, the volume ratio (%) of carbon dioxide in the sour gas feed is 8.51 to 10.15, the temperature of the amine is 38.03 to 43.96 °C, and the amine circulation rate is 788.39 to 1122.35 m³/h. The presented work can be considered as a guideline for increasing the recovery efficiency of CO₂ for both new and existing sweetening units.