scholarly journals Corrosion Inhibition of Tubing Steel during Acidization of Oil and Gas Wells

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
M. Yadav ◽  
Sumit Kumar ◽  
P. N. Yadav
Keyword(s):  
Corrosion Inhibition ◽  
Oil And Gas ◽  
Ac Impedance ◽  
Charge Transfer Resistance ◽  
Gas Production ◽  
Oil Well ◽  
Transfer Resistance ◽  
Oil And Gas Production ◽  
N80 Steel ◽  
High Degree

Acidization is an oil reservoir stimulation technique for increasing oil well productivity. Hydrochloric acid is used in oil and gas production to stimulate the formation. The acid treatment occurs through N80 steel tubes. The process requires a high degree of corrosion inhibition of tubing material (N80 steel). In the present investigation effect of synthesized amino acid compounds, namely, acetamidoleucine (AAL) and benzamidoleucine (BAL) as corrosion inhibitors for N80 steel in 15% HCl solution was studied by polarization, AC impedance (EIS), and weight loss measurements. It was found that both the inhibitors were effective inhibitors and their inhibition efficiency was significantly increased with increasing concentration of inhibitors. Polarization curves revealed that the studied inhibitors represent mixed type inhibitors. AC impedance studies revealed that charge transfer resistance increases and double layer capacitance decreases in presence of inhibitors. Adsorption of inhibitors at the surface of N80 steel was found to obey Langmuir isotherm.

scholarly journals Development of Ecofriendly Corrosion Inhibitors for Application in Acidization of Petroleum Oil Well

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
M. Yadav ◽  
Sumit Kumar ◽  
P. N. Yadav
Keyword(s):  
Corrosion Inhibition ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Petroleum Industry ◽  
Charge Transfer Resistance ◽  
Oil Well ◽  
Transfer Resistance ◽  
Root Cause ◽  
N80 Steel ◽  
Petroleum Oil

In the present investigation the protective ability of 1-(2-aminoethyl)-2-octadecylimidazoline (AEODI) and 1-(2-octadecylamidoethyl)-2-octadecylimidazoline (ODAEODI) as corrosion inhibitors for N80 steel in 15% hydrochloric acid has been studied, which may find application as ecofriendly corrosion inhibitors in acidizing processes in petroleum industry. Different concentration of synthesized inhibitors AEODI and ODAEODI was added to test solution (15% HCl), and corrosion inhibition of N80 steel was tested by weight loss, potentiodynamic polarization, and AC impedance measurements. Influence of temperature (298 to 323 K) on the inhibition behaviour was studied. Surface studies were performed by using SEM. It was found that both the inhibitors were effective inhibitors, and their inhibition efficiency was significantly increased with increasing their concentration. Polarization curves revealed that the used inhibitors represent mixed-type inhibitors. The adsorption of used inhibitors led to a reduction in the double-layer capacitance and an increase in the charge transfer resistance. The adsorption of used compounds was found to obey Langmuir isotherm. The adsorption of the corrosion inhibitors at the surface of N80 steel is the root cause of corrosion inhibition.

The Effect of Opal-Containing Rocks on the Properties of Lightweight Oil-Well Cement

2021 ◽  
Vol 325 ◽  
pp. 47-52
Author(s):  
Fedor L. Kapustin ◽  
N.N. Bashkatov ◽  
Rudolf Hela
Keyword(s):  
Flexural Strength ◽  
Oil And Gas ◽  
Gas Production ◽  
Cement Stone ◽  
Oil Well ◽  
Cement Slurry ◽  
Water Separation ◽  
Oil And Gas Production ◽  
Geological Conditions ◽  
Cement Grinding

When constructing deep wells for oil and gas production in difficult geological conditions, special lightweight oil-well cements are used. To reduce the density and water separation of the cement slurry as well as to increase the strength, corrosion resistance of cement stone and the quality of well cementing, opal-containing rocks, fly ash, microsphere and other lightening additives are introduced into the cement composition. The influence of sedimentary rocks, such as opoka, tripoli, and diatomite containing from 43 to 81% amorphous silica on the grindability, rheological and physical-mechanical properties of lightweight oil-well Portland cement has been studied. The twelve cement compositions with different content of additives (from 30 to 45%) that meet the requirements of the standard for density, spreadability, water separation, thickening time and flexural strength were selected. The introduction of 45% diatomite or tripoli significantly reduces the duration of cement grinding, provides the cement slurry with water-cement ratio of 0.9 with better density and flexural strength, respectively, 1480 kg/m3 and 1.1–1.5 MPa.

scholarly journals Abandonment of an Iraqi Well, justifications and feasibility study

2020 ◽  
Vol 10 (4) ◽  
pp. 85-94
Author(s):  
Dr. Kareem A. Alwan ◽  
Hayder A. AlAttaby
Keyword(s):  
Fresh Water ◽  
Water Contamination ◽  
Oil And Gas ◽  
Petroleum Industry ◽  
Environmental Issues ◽  
Gas Production ◽  
Oil Well ◽  
Oil And Gas Production ◽  
Current Time

At the beginning of petroleum industry evolving the regulation did not focus on environmental issues, it was, mainly, looking to natural resources (oil and gas) production and protection. By the time, environmental and safety implications started to be the highest priority, as a result of undesirable impact of oil operations on plant. Huge numbers of dry wells were abandoned according to environmental regulations to prevent side effects which involved contamination of shallow water aquifers, surface seepage of hydrocarbon (whether oil or gas) or salty water, potential hazardous of explosion or soil contaminations, and water contamination at offshore unplugged wells. Based on the hazards above, the main objectives of plugging and abandonment operations is to achieve isolation and protection of all fresh and near fresh water zones, and all future commercial zones, as well as prevent leaks in perpetuity from or into the well and remove surface equipment and cut pipe to a mandated level below the surface. In this paper, an Iraqi oil well was studied as a case study of abandonment processes. The well represents a danger to people, environment and subsurface fresh water; due to unusual raised pressure in different annuluses and copious surface leak from wellhead components while production. Worthily to say that, it is seldom in Iraq to abandon the wells in current time, according to good reservoirs situation. The reasons and justifications of this well plugging, depending on economic analysis and investigation were studied, and explained, according to international practices and procedures of such treatments. The workover option is most economic option, but it was eliminated due to failure in ensuring the well safety and severe environmental impact which expected. According to investigation, pressure and laboratory tests were revealed that P&A is mandatory for this well as soon as possible.

scholarly journals Electrochemical and thermodynamic properties of 1-phenyl-3-(phenylamino)propan-1-one with Na 2 WO 4 on N80 steel

2020 ◽  
Vol 7 (5) ◽  
pp. 191692
Author(s):  
Yun Wang ◽  
Jun Hu ◽  
Lei Zhang ◽  
Jiangli Cao ◽  
Minxu Lu
Keyword(s):  
Corrosion Inhibition ◽  
Steel Surface ◽  
Corrosion Behaviour ◽  
Charge Transfer Resistance ◽  
Point Of View ◽  
Inhibition Mechanism ◽  
Adsorption Behaviour ◽  
Adsorption Model ◽  
Transfer Resistance ◽  
N80 Steel

The corrosion inhibition effect and adsorption behaviour of 1-phenyl-3-(phenylamino)propan-1-one (PPAPO) on N80 steel in hydrochloric acid solution have been investigated by Fourier transform infrared (FTIR), electrochemical method and scanning electron microscopy. The corrosion inhibition mechanism of PPAPO mixed with Na 2 WO 4 was interpreted from the thermodynamic point of view. The results indicated that PPAPO mixed with Na 2 WO 4 acted as a mixed-type inhibitor. The inhibition film formed on N80 steel surface can increase the charge transfer resistance and prevent the occurrence of corrosion reaction, thereby reducing the corrosion rate of metal surface. The inhibition efficiency was up to 96.65%; the inhibitor PPAPO with Na 2 WO 4 showed good synergistic effect on N80 corrosion behaviour in HCl solution. The adsorption behaviour of inhibitors on N80 steel surface was in accordance with the Langmuir adsorption model and mainly belonged to chemisorption. The adsorption process of PPAPO on N80 surface was spontaneous and irreversible endothermic reaction.

scholarly journals Analysis of the performance indicators of oil well sucker-rod pumps

Dependability ◽  
2018 ◽  
Vol 18 (3) ◽  
pp. 22-26
Author(s):  
Z. E. Eyvazova ◽  
T. E. Farajov
Keyword(s):  
Theoretical Analysis ◽  
Oil And Gas ◽  
Gas Production ◽  
Normal Operation ◽  
Oil Well ◽  
Oil And Gas Production ◽  
Sucker Rod ◽  
Sucker Rod Pump ◽  
Computer Calculations ◽  
Long Stroke

The paper notes that as the depths of operated wells grow, the application of cable and pulley mechanisms becomes preferable as compared to the existing pumpjacks. A generalized theoretical analysis of the kinematics of cable and pulley drives is set forth. The authors present the general theoretical analysis of the kinematics of the above mechanisms, as well as the results of computer calculations based of the developed equations for a number of cases. Further analysis of the results showed that the crank mechanisms of a rope pulley have “smooth” kinematics. The research resulted in a proposed invention of the design of mast-type oil well sucker-rod pump drive with lower steel intensity and power consumption that would allow increasing the performance of sucker-rod pumps.The Purpose of this article consists in finding a utility model of a pump for the well rod in order to ensure the environmental safety of the equipment. That is achieved by lightening the metal structure of the pump with rotary stem and energy consumption is reduced. In the context of this problem, some calculations were performed in order to prove the system’s dependability. Based on the performed calculations it was established that the light structure can be used instead of the old heavy structure being its environmentally safe version. Experimental studies conducted by AzINMASH Research and Design Institute of Petroleum Engineering (Baku, Azerbaijan) indicate the feasibility of normal operation of sucker-rod pumps under the condition that n∙S = 54÷60 m/min. The authors examined the dependence between the peak output Q and the number of strokes n for various standard pumpjack sizes. The analysis of the parameters shown that the value of the product n∙S in the existing pumpjacks is below the recommendations based on experimental data, i.e. there is a tangible opportunity of increasing the productivity by extending the stroke of the rod hanger center, since well pump barrels may be as long as 6 to 7 meters. Estimates show that while studying the kinematics of long-stroke drives the changes in the length of the rope may be practically disregarded due to the displacement of the rope-to-pulley contact point. This simplifies the formulas that describe the kinematics of this type of long-stroke drives. Using the resulting formulas, comparative computer calculations for various cases were performed. It is shown that cable and pulley mechanisms have “softer” kinematics. The calculations confirmed the advisability of modification of the pump’s design that ensured reduced pollution of environment and energy savings. The future world will need renewable sources of energy, more power-efficient oil and gas production, minimal or zero pollution of the environment, thus the proposed solution appears to be of relevance. The authors propose a more productive design of sucker-rod pump that is easy to install and maintain at oil and gas production facilities. That can be achieved based on the calculations mentioned above. 

scholarly journals Gas lift optimization in the oil and gas production process: a review of production challenges and optimization strategies

2020 ◽  
Vol 1 (2) ◽  
pp. 61
Author(s):  
Ikenna Tobechukwu Okorocha ◽  
Chuka Emmanuel Chinwuko ◽  
Chika Edith Mgbemena ◽  
Chinedum Ogonna Mgbemena
Keyword(s):  
Production Process ◽  
Oil And Gas ◽  
Gas Injection ◽  
Injection Rate ◽  
Gas Production ◽  
Optimization Techniques ◽  
Oil Well ◽  
Oil And Gas Production ◽  
Artificial Lift ◽  
Gas Lift

Gas Lift operation involves the injection of compressed gas into a low producing or non-performing well to maximize oil production. The oil produced from a gas lift well is a function of the gas injection rate. The optimal gas injection rate is achieved by optimization. However, the gas lift, which is an artificial lift process, has some drawbacks such as the deterioration of the oil well, incorrect production metering, instability of the gas compressor, and over injection of gas. This paper discusses the various optimization techniques for the gas lift in the Oil and Gas production process. A systematic literature search was conducted on four databases, namely Google Scholar, Scopus, IEE Explore and DOAJ, to identify papers that focused on Gas lift optimizations. The materials for this review were collected primarily via database searches. The major challenges associated with gas lift were identified, and the different optimization strategies available in the literature reviewed. The strategies reviewed were found to be based on artificial intelligence (AI) and machine learning (ML). The implementation of any of the optimization strategies for the gas lift will enhance profitability, reduce operational cost, and extend the life of the wells.

On the Application of Well Stimulation Method in Improvement of Oil Recovery

2015 ◽  
Vol 735 ◽  
pp. 31-35 ◽  
Author(s):  
Abdoullatif Gharibi ◽  
Mansoor Zoveidavianpoor ◽  
Farshad Daraei Ghadikolaei
Keyword(s):  
Hydraulic Fracturing ◽  
Oil Recovery ◽  
Oil And Gas ◽  
Comprehensive Evaluation ◽  
Oil And Gas Industry ◽  
Gas Production ◽  
Oil Well ◽  
Oil And Gas Production ◽  
Well Stimulation ◽  
Stimulation Method

Hydraulic Fracturing, Proppant, Acid FracturingAbstract. Increase in the price of oil and gas during recent years have motivated oil and gas companies to focus on the methods that lead to increasing in the oil and gas production. Oil well stimulation as one of these methods includes a variety of operations that performed to improve productivity of the well. The main objective of a stimulation treatment is to increase the rate at which the formation delivers hydrocarbons naturally. Today’s well stimulation method is converted to the appropriate method in the oil and gas industry to maintain or increase of well productivity. Injection of acid to partially dissolve the rock, and hydraulic fracturing to split the rock and prop it open with proppant are two common techniques for stimulating of the wells. Deciding about selection of the best method for stimulation of the wells is related to the comprehensive evaluation of capabilities of each technique and conditions which are governed on specific job intended. In this article, we are trying to present a description about well stimulation method, methods that are employed to execute well stimulation, and application of these different techniques for stimulating of wells.

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