scholarly journals Using High‐Density Magnetic and Electromagnetic Data for Waste Site Characterization a Case Study

1995 ◽  
Author(s):  
John R. Cochran ◽  
Kim E. Dalton
Keyword(s):  
Site Characterization ◽  
High Density ◽  
Waste Site ◽  
Electromagnetic Data

High-density 3D point receiver seismic acquisition and processing – a case study from the Sichuan Basin, China

First Break ◽  
2014 ◽  
Vol 32 (1) ◽  
Author(s):  
F. Xiao ◽  
J. Yang ◽  
B. Liang ◽  
M. Zhang ◽  
R. Li ◽  
...  
Keyword(s):  
Sichuan Basin ◽  
High Density ◽  
Seismic Acquisition ◽  
The Sichuan Basin

High density European Rail Traffic Management System (HD-ERTMS) for urban railway nodes: The case study of Rome

2021 ◽  
Vol 17 ◽  
pp. 100232
Author(s):  
Federico Cuppi ◽  
Valeria Vignali ◽  
Claudio Lantieri ◽  
Luca Rapagnà ◽  
Nicola Dimola ◽  
...  
Keyword(s):  
Traffic Management ◽  
Management System ◽  
High Density ◽  
Traffic Management System ◽  
Rail Traffic

Use of Micronized Weighting Agents for High Density Completion Fluids: A Case Study

2021 ◽  
Author(s):  
Sufyan Deshmukh ◽  
Marcelo Dourado Motta ◽  
Sameer Prabhudesai ◽  
Mehul Patil ◽  
Yogesh Kumar ◽  
...  
Keyword(s):  
Environmental Impact ◽  
High Density ◽  
Fluid Loss ◽  
Damage Potential ◽  
Coiled Tubing ◽  
Viscosity Profile ◽  
Invert Emulsion ◽  
Emulsion Fluid ◽  
Minimal Fluid

Abstract A unique invert emulsion fluid (IEF) weighted up with treated micronized weighting agent (MWA) slurries has been developed and successfully implemented in the field as a completion and testing fluid. The utilization of this unique IEF by design allowed the fluid properties to be lower on viscosity and superior suspension characteristics, which allowed for thermally stable fluid and provided excellent downhole hydraulics performance. Much of the earlier development and deployment of this type of IEF was focused on drilling for sections in narrow mud weight and fracture gradient windows, coiled tubing operations, managed pressure drilling, and extended reach wells. Many of these drilling challenges are also encountered in high pressure and high temperature (HTHP) and ultra-deepwater field developments and mature, depleted fields. Early fluid developments focused on designing the fluids chemistry and physics interactions and the optimization of mineralogy of the weighing agent used. There was also some concern on variability of the results seen on the return permeability as well as standard fluid loss experiments. The paper describes the laboratory and field and rigsite data generated while using the MWA in IEFs during completion operations with a client in India. The paper will briefly describe the laboratory work before the application and the associated results observed on the rig site. It will also outline all the challenges which were faced during the execution and mixing of the MWA IEFs. Each separate operation required a high-density reservoir fluid solution above 15.5 ppg [1.85 sg]. Because corrosion, sag potential, and scale were the operator's main concerns, a solids-free brine or other type of weighting agent (for e.g. Calcium Carbonate and/or Tri-Manganese Tetra Oxide) solution was not favored. A high-density IEF designed with MWA allowed us to provide a solution that mitigated against the risks identified in each operation. The thin viscosity profile enabled completion activities to proceed with minimal fluid consumption at surface, reducing the overall environmental impact. The high-density (15.6 ppg [1.86 SG] and 16.2 ppg [1.94 SG]) invert emulsion fluid was designed to minimize sag potential with minimal reservoir damage potential. With a thinner viscosity profile compared to conventional IEFs at equivalent densities, the fluid enabled completion activities with minimal fluid volumes lost over shakers and reduced the environmental impact. The MWA that was used to build the IEF used for drilling and completion fluid enabled maintenance of extremely low-shear rate viscosities when compared to conventional barite-laden fluids. This fluid was used for suspending and abandoning the well in Case Study A, where the reentry and intervention of the well was planned to be after 2 years. After exposure of the fluid in Case Study A, the fluid showed minimum sag after re-entry of the well and the intervention activities were done without any problems. Case Study B showed that the fluid was mixed to the density of 16.2 ppg and was used to perforate and test two different zones. The bottom hole static temperature (BHST) reported were 356 degF (180 degC) for Case Study A and 376 degF (191 degC) for Case Study B respectively. The paper attempts to show the effects of using this alternative weighing agent as a completion fluid instead of a high-density solids-free brine or other solids-laden high-density brines and the associated success, which could be managed if the fluid design is carefully planned.

scholarly journals Psychosocial and Demographic Factors That Compound Alcohol Abuse Amongst Youth: A Case Study of Musina High School

2019 ◽  
Vol 11 (7) ◽  
pp. 69 ◽  
Author(s):  
Frans Koketso Matlakala ◽  
Jabulani Calvin Makhubele ◽  
Prudence Mafa
Keyword(s):  
High School ◽  
Young People ◽  
Alcohol Abuse ◽  
Rural Areas ◽  
Demographic Factors ◽  
High Density ◽  
Design Data ◽  
Alcohol Outlets ◽  
The Social

The risk factors that compound alcohol abuse by young people have significant effects of individuals. The sole purpose of social work is to enhance the social functioning of clients and in most cases, clients have impairments as the result of high density of alcohol outlets, affordability of alcohol, which later give birth to psychosocial challenges. The aim of this study is to describe psychosocial and demographic factors compounding alcohol abuse amongst youth. The study employed quantitative approach and descriptive case study design. Data was collected at Musina High School and 96 learners were sampled using stratified sampling to complete the questionnaire. Data was analysed descriptively with the aid of Statistical Package for the Social Science. The study revealed that psychosocial and environmental factors compound to alcohol abuse amongst youth in Musina High School. The study concludes that the context determines the excessive use of alcohol abuse by youth. Young people especially those who reside in rural areas are exposed to high density of alcohol outlets and they are left without guardianship. Due to lack of guardian or parental involvement they end up indulging in excessive use of alcohol.

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