Influence of environmental parameters on corrosion mechanisms of steels used in oil field

2015 ◽  
Vol 66 (11) ◽  
pp. 1245-1249 ◽  
Author(s):  
L. Sow ◽  
J. Idrac ◽  
P. Mora ◽  
E. Font
Keyword(s):  
Environmental Parameters ◽  
Oil Field ◽  
Corrosion Mechanisms

scholarly journals Effect of Rock Properties on ROP Modeling Using Statistical and Intelligent Methods: A Case Study of an Oil Well in Southwest of Iran

2017 ◽  
Vol 62 (1) ◽  
pp. 131-144 ◽  
Author(s):  
Sina Norouzi Bezminabadi ◽  
Ahmad Ramezanzadeh ◽  
Seyed-Mohammad Esmaeil Jalali ◽  
Behzad Tokhmechi ◽  
Abbas Roustaei
Keyword(s):  
Correlation Coefficients ◽  
Physical And Mechanical Properties ◽  
Environmental Parameters ◽  
Oil Field ◽  
Rock Properties ◽  
Oil Well ◽  
Ann Model ◽  
Operation Performance ◽  
Southwest Of Iran ◽  
Intelligent Methods

Abstract Rate of penetration (ROP) is one of the key indicators of drilling operation performance. The estimation of ROP in drilling engineering is very important in terms of more accurate assessment of drilling time which affects operation costs. Hence, estimation of a ROP model using operational and environmental parameters is crucial. For this purpose, firstly physical and mechanical properties of rock were derived from well logs. Correlation between the pair data were determined to find influential parameters on ROP. A new ROP model has been developed in one of the Azadegan oil field wells in southwest of Iran. The model has been simulated using Multiple Nonlinear Regression (MNR) and Artificial Neural Network (ANN). By adding the rock properties, the estimation of the models were precisely improved. The results of simulation using MNR and ANN methods showed correlation coefficients of 0.62 and 0.87, respectively. It was concluded that the performance of ANN model in ROP prediction is fairly better than MNR method.

The Mechanisms for Hydrothermal Leaching of Nuclear Waste Glasses: Properties and Evaluation of Surface Layers

1981 ◽  
Vol 11 ◽  
Author(s):  
GÜnter Malow
Keyword(s):  
Environmental Parameters ◽  
Specific Weight ◽  
Deionized Water ◽  
High Level Waste ◽  
Surface Layers ◽  
Leach Rate ◽  
Weight Losses ◽  
Corrosion Mechanisms ◽  
High Level ◽  
Glass Compositions

Remobilization of solidified high-level waste by corrosion and transport of radionuclides by groundwater are the only likely events for radioactivity to find its way back to the environment. The interaction of the waste form with aqueous solutions is the most important mechanism and must be known for safety and risk analysis. It has been shown that the activity release depends on a number of experimental and environmental parameters. The corrosion mechanisms of the waste forms control the leach rate of individual components. Of particular importance to the resistance against water attack of various glass compositions is the formation of layers on the glass surface. The results for leaching in deionized water reveafed that the mechanism was strongly influenced by the formation of a surface layer which determined the further attack on the glass. In this work the specific weight losses of the glass after leaching in rock salt and MgCl2–MgSO4-NaCl-KCl solutions were measured and surface layers investigated.

Oil Field Downhole Drone

2021 ◽  
Author(s):  
Mohammed Al Dabbous ◽  
Mohammad Al-Kadem
Keyword(s):  
Data Storage ◽  
Industrial Revolution ◽  
Mechanical Energy ◽  
Environmental Parameters ◽  
Positive Influence ◽  
Propulsion System ◽  
Oil Field ◽  
Well Production ◽  
Coiled Tubing ◽  
Productive Zone

Abstract The downhole drone is directed toward an autonomous Oil & Gas (O&G) utilization of a drone in subsurface wells. The autonomous submersible O&G drone comprises a circular shaped housing, a propulsion system with one or more spinner blades located at the front and rear sides driven by electromotors that can pivot along the axis of drone for locomotion determination and a control package unit: wireless transponder, power, control and data storage and sensors. Existing technologies for surveying, such as production logging conveyed into the wellbore by coiled tubing limits wellbore access due to factors such as the length and size of wellbore, the trajectory/inclination. These factors, and in situ environmental parameters, may limit and restrict access surveying the entire wellbore via existing technologies. This adaptable for wellbore surveillance and logging includes: body, circular structure for stabilization, rechargeable spinners, digital temperature and pressure, gradiometer, gyroscope and wireless communication package. The drone is dropped into the well from the surface under shut in conditions and falls by gravity into the lowest section of the hole. The implementation associates with minimization of man-hours with cost avoidance. The concept has a positive influence on the environment since personnel will be less exposed to hydrocarbons, especially hazardous gases such as Hydrogen Sulfide and Carbon Dioxide. The autonomous, remotely guided downhole drone surveys a predetermined area in the downhole well environment to collect well production data in terms of fluid entry/exit from the well bore, velocity as the well is in production or shut in conditions. Data such as: flow rate, temperature & pressure profiling and leak deduction. The drone moves into the production section of the well by its own propulsion as directed by the surface control system. At selected locations, it stops and takes measurements by rotating two propulsion spinners that are rechargeable; converting mechanical energy into electrical. Pressure, temperature and gradiometer information is collected continuously as the drone is propelled through the productive zone as well as when stationary. Upon completion of required data collection through the productive zone, the vehicle is simply lifted out of the hole by the flow of the well assisted by the propulsion system as required. The future of fourth Industrial Revolution (IR 4.0) was paved commencing from the pioneering realization of the value of well intervention. This invention has a magnificent contribution in cost saving, conveyance methodologies improvement, personnel safety, energy conservation, downhole visualization and perpetuating the investment in the human capital.

HUBUNGAN KEPADATAN BIVALVIA DENGAN PARAMETER LINGKUNGAN DI PESISIR TANJUNG PURA KABUPATEN BANGKA TENGAH

2020 ◽  
Vol 13 (2) ◽  
pp. 112-121
Author(s):  
Sudiyar . ◽  
Okto Supratman ◽  
Indra Ambalika Syari
Keyword(s):  
Negative Impact ◽  
Principal Component ◽  
Environmental Parameters ◽  
Data Retrieval ◽  
Distribution Patterns ◽  
Random System ◽  
System Method ◽  
Relationship Of ◽  
The Relationship ◽  
Anadara Granosa

The destructive fishing feared will give a negative impact on the survival of this organism. This study aims to analyze the density of bivalves, distribution patterns, and to analyze the relationship of bivalves with environmental parameters in Tanjung Pura village. This research was conducted in March 2019. The systematic random system method was used for collecting data of bivalves. The collecting Data retrieval divided into five research stasions. The results obtained 6 types of bivalves from 3 families and the total is 115 individuals. The highest bivalve density is 4.56 ind / m², and the lowest bivalves are located at station 2,1.56 ind / m²,  The pattern of bivalve distribution in the Coastal of Tanjung Pura Village is grouping. The results of principal component analysis (PCA) showed that Anadara granosa species was positively correlated with TSS r = 0.890, Dosinia contusa, Anomalocardia squamosa, Mererix meretrix, Placamen isabellina, and Tellinella spengleri were positively correlated with currents r = 0.933.

Recirculation versus flow-through rainbow trout laboratory Flavobacterium columnare challenge

2020 ◽  
Vol 139 ◽  
pp. 213-221
Author(s):  
C Birkett ◽  
R Lipscomb ◽  
T Moreland ◽  
T Leeds ◽  
JP Evenhuis
Keyword(s):  
Rainbow Trout ◽  
Environmental Parameters ◽  
Cumulative Effects ◽  
Flavobacterium Columnare ◽  
Replacement Rate ◽  
Bacterial Concentration ◽  
Water Replacement ◽  
Dose Concentration ◽  
Flow Through ◽  
And Control

Flavobacterium columnare immersion challenges are affected by water-related environmental parameters and thus are difficult to reproduce. Whereas these challenges are typically conducted using flow-through systems, use of a recirculating challenge system to control environmental parameters may improve reproducibility. We compared mortality, bacterial concentration, and environmental parameters between flow-through and recirculating immersion challenge systems under laboratory conditions using 20 rainbow trout families. Despite identical dose concentration (1:75 dilution), duration of challenge, lot of fish, and temperature, average mortality in the recirculating system (42%) was lower (p < 0.01) compared to the flow-through system (77%), and there was low correlation (r = 0.24) of family mortality. Mean days to death (3.25 vs. 2.99 d) and aquaria-to-aquaria variation (9.6 vs. 10.4%) in the recirculating and flow-through systems, respectively, did not differ (p ≥ 0.30). Despite 10-fold lower water replacement rate in the recirculating (0.4 exchanges h-1) compared to flow-through system (4 exchanges h-1), differences in bacterial concentration between the 2 systems were modest (≤0.6 orders of magnitude) and inconsistent throughout the 21 d challenge. Compared to the flow-through system, dissolved oxygen during the 1 h exposure and pH were greater (p ≤ 0.02), and calcium and hardness were lower (p ≤ 0.03), in the recirculating system. Although this study was not designed to test effects of specific environmental parameters on mortality, it demonstrates that the cumulative effects of these parameters result in poor reproducibility. A recirculating immersion challenge model may be warranted to empirically identify and control environmental parameters affecting mortality and thus may serve as a more repeatable laboratory challenge model.

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