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.com
Volume 8, Issue 4 (Suppl)
J Pet Environ Biotechnol, an open access journal
ISSN: 2157-7463
Oil Gas Expo 2017
July 13-14, 2017
Oil and Gas
July 13-14, 2017 Berlin, Germany
3
rd
International Conference and Expo on
J Pet Environ Biotechnol 2017, 8:4 (Suppl)
DOI: 10.4172/2157-7463-C1-035
Heat stress management for workers in hot climates
Neil Hokins
Healthfit International, Australia
Statement of the Problem:
Heat stress illnesses and deaths are still occurring in the oil/gas/mining sectors worldwide. Companies
have a duty of care to their workforce to ensure controls are in place to reduce risks/hazards in the work place.
Methodology &Theoretical Orientation:
Heat stress management plans are set up in many industries like construction/mining/oil
and gas/maritime etc., in Australia, Papua New Guinea and also in the Danakil desert in Ethiopia. These plans are country/project
specific to meet the needs of employees working in these austere environments.
Findings:
On every project that we have rolled out these heat stress management plans, we have been able to reduce all heat stress
related illnesses to nil. We also found that we can reduce fatigue conditions thereby reducing accident/incidents from occurring and
also decrease minor sprains and strains, thereby decreasing MTI's/LTI's. The plan also reduces down time such as work rest cycling
via the use of the thermal work limit heat stress indices and engineering controls that we can introduce, this is a win-win situation
for any company and its employees, as it reduces lost production costs to the company and also reduces the chance of an employee
having a heat stress illness event and also increases productivity of the worker because the comfort ability rating to the body is much
higher, which means they will be able to burn off more energy with a reduced risk of heat stress illness.
Conclusion & Significance:
Heat stress management plans are easy to set up and cost effective, they can if instigated effectively
reduce heat stress illness to nil and reduce fatigue and workplace incidents.
Neil@healthfit.net.auWellbore stability analysismodel including poro-elastic, chemical and thermal effect during underbalanced
drilling operation for fractured reservoir
Reda Rabiee Abdel Azim, Ahmed Elbagir
and
Saad Balhasan
American University of Ras Al Khaimah, UAE
B
efore drilling operation, rock stress is described by the
in situ
stress, which includes effective overburden stress, effective
maximum horizontal stress and effective horizontal stress. As the drilling continues and the hole has been drilled the support
provided by the rock will be removed as a result of the drilling operation and supposed to be replaced by the hydrostatic pressure.
The statues of the rock surrounding the wellbore will be alter which will redistribute the in situ stress around the wellbore due to
the excavation, causing mechanical wellbore stability problems such as hole enlargement, hole reduction, lost circulation and may
leads to serious well control problems specially in fractured reservoirs. Therefore preventive measurement should be taken in order
to planning stable wellbore and identification of stability problems in the field. In addition, to evaluate the potential for wellbore
stability a realistic model is recommended to be used to calculate the stresses and strains around the borehole. Therefore, this paper
presents an approach to simulate the wellbore stability under chemo-thermo-poro-elastic conditions. This approach incorporates
finite element modeling technique and effective permeability tensor for small to medium generated fractures (length <20 m). The
simulation of wellbore stability process is running in underbalance drilling (UBD) technique conditions. This is to prevent formation
damage, avoid lost circulation and increase rate of penetration. Where, UBD is also dangerous and may lead to wellbore failure due to
absence of positive support created by the hydrostatic of the drilling fluid column. Hence, the application of UBD should be assessed
throughout the use of
in situ
stresses and rock mechanical properties to estimate under which hydraulic drilling conditions in the
wellbore is stable. Analytical solutions for stress distribution for isotropic and anisotropic rocks are presented. In addition, a solution
for the upper limit for the mud window to prevent tensile failure is developed.
reda.abdelazim@aurak.ac.ae