THE TECHNICAL, ENVIRONMENTAL AND CULTURAL CHALLENGES OF DRILLING ON THE EDGE OF A NATIONAL PARK

2005 ◽  
Vol 45 (1) ◽  
pp. 535
Author(s):  
J.E. Coleman ◽  
L.N. Franks ◽  
M.D. Berry
Keyword(s):  
National Park ◽  
Gas Flow ◽  
Management Plan ◽  
Mitigation Measures ◽  
Gas Field ◽  
Cultural Challenges ◽  
Rare And Endangered ◽  
Drilling Operations ◽  
Drilling Site ◽  
Cabbage Palm

Magellan Petroleum, operator of the Palm Valley Gas Field, successfully drilled the Palm Valley–11 (PV–11) gas development well situated on aboriginal land adjacent to the Finke Gorge National Park, Central Australia. The drilling site was located within the Palm Creek catchment area, an environmentally significant and internationally renowned area which feeds the rare and endangered red cabbage palm (Livistona mariae).Although no commercial gas flow was encountered, the well was a success in terms of the technical, environmental and cultural heritage challenges faced during the 71-day drilling program.Several mitigation measures not generally required in petroleum drilling operations were incorporated in the PV–11 Drilling Program and Environmental Management Plan (EMP).This paper describes the Commonwealth and Northern Territory approval processes required to ensure all risks were identified and addressed; the challenges of drilling the PV–11 well using under-balanced techniques in difficult conditions; and the mitigation measures adopted to address these challenges.

Co-Current and Countercurrent Migration of Gas Kicks in “Horizontal” Wells

1999 ◽  
Vol 121 (2) ◽  
pp. 96-101 ◽  
Author(s):  
H. Baca ◽  
J. Smith ◽  
A. T. Bourgoyne ◽  
D. E. Nikitopoulos
Keyword(s):  
Test Section ◽  
Gas Flow ◽  
Gas Injection ◽  
Horizontal Wells ◽  
Gas Flows ◽  
Countercurrent Flow ◽  
Drilling Operations ◽  
Operating Window ◽  
Annular Pipes ◽  
Injection Rates

Results from experiments conducted in downward liquid-gas flows in inclined, eccentric annular pipes, with water and air as the working fluids, are presented. The gas was injected in the middle of the test section length. The operating window, in terms of liquid and gas superficial velocities, within which countercurrent gas flow occurs at two low-dip angles, has been determined experimentally. The countercurrent flow observed was in the slug regime, while the co-current one was stratified. Countercurrent flow fraction and void fraction measurements were carried out at various liquid superficial velocities and gas injection rates and correlated to visual observations through a full-scale transparent test section. Our results indicate that countercurrent flow can be easily generated at small downward dip angles, within the practical range of liquid superficial velocity for drilling operations. Such flow is also favored by low gas injection rates.

scholarly journals Mapping and evaluation of the state of conservation of the vegetation in and surrounding the Chapada Diamantina National Park, NE Brazil

2009 ◽  
Vol 9 (2) ◽  
pp. 21-30 ◽  
Author(s):  
Roy Richard Funch ◽  
Raymond Mervyn Harley ◽  
Ligia Silveira Funch
Keyword(s):  
National Park ◽  
Development Planning ◽  
Management Plan ◽  
Decision Makers ◽  
Vegetation Map ◽  
Chapada Diamantina ◽  
Diamond Mining ◽  
Agricultural Use ◽  
Sedge Meadows ◽  
Management And Conservation

The Chapada Diamantina National Park (CDNP) was created in the midst of a densely populated area, and significant sections of the reserve are still undergoing processes of natural regeneration after intensive diamond mining activities were initiated in the mid-1800's. An up-to-date vegetation map was needed in order to indicate the types and distribution of regional vegetation assemblages in an easily interpretable manner and at an appropriate planning scale that could be easily consulted by decision makers and other interested groups at all levels of conservation (and development) planning. A vegetation map of the Chapada Diamantina National Park, and the areas immediately surrounding it, was prepared that: 1) delimits, describes, and maps the regional vegetation assemblages; 2) provides an indication of the degree of conservation of the mapped vegetation; 3) develops this information in a format that facilitates continued updating and revision as more information becomes available, enabling the monitoring of the evolution of the Park lands, and; 4) presents this information in a manner that can be easily interpreted and used for planning, management and conservation purposes. The resulting vegetation map revealed intensive anthropogenic disturbances in forested, savanna, and semi-arid areas subjected to intensive agricultural use outside of the Park boundaries. The National Park lands are generally well preserved but burning has replaced formerly extensive forest areas with open sedge meadows. In spite of intensive modification of the regional vegetation, two well preserved areas with high priority for conservation efforts beyond the National Park limits were identified and characterized. The vegetation mapping of the park itself can aid in the preparation of its management plan and in the reformulation of the existing boundaries of that reserve.

scholarly journals Plant communities and landscapes of the Parque Nacional do Limpopo, Moçambique

Koedoe ◽  
2004 ◽  
Vol 47 (2) ◽  
Author(s):  
M. Stalmans ◽  
W.P.D. Gertenbach ◽  
Filipa Carvalho-Serfontein
Keyword(s):  
Plant Communities ◽  
National Park ◽  
Building Blocks ◽  
Management Plan ◽  
Kruger National Park ◽  
Vegetation Map ◽  
Great Limpopo Transfrontier Park ◽  
Eastern Boundary

The Parque Nacional do Limpopo (PNL) was proclaimed during 2002. It covers 1 000 000 ha in Moçambique on the eastern boundary of the Kruger National Park (KNP) and forms one of the major components of the Great Limpopo Transfrontier Park. A vegetation map was required as one of the essential building blocks for the drafting of its management plan (Grossman & Holden 2002).

scholarly journals Etude Eco-Dendrométrique Du Dépérissement Du Cèdre De l’Atlas Dans Le Parc National De Theniet El Had “Algérie”

2016 ◽  
Vol 12 (29) ◽  
pp. 112
Author(s):  
Taleb Mohamed Lamine ◽  
Maatoug M’hamed ◽  
Azouzi Blel ◽  
Zedek Mohamed ◽  
Hellal Benchabane
Keyword(s):  
Analysis Of Variance ◽  
National Park ◽  
Ecological Factors ◽  
Management Plan ◽  
Ecological Data ◽  
Descriptive Data ◽  
North West ◽  
The North ◽  
The Relationship

This study aims to search the relationship between the decline of the Atlas cedar and the eco-dendrometrique factors in the National Park of Theniet El Had located in the north-west of Algeria. This study takes place throughout 30 circular plots of 1.000m2 area in which, a dendrometric measures and ecological data are taken in addition to descriptive data for Atlas cedar trees. The descriptive data shows that 34% of inventoried Atlas cedar have damaged leaves and 30% have more then 25% of their crowns damaged. The analysis of variance shows that there is no relationship between the rate of the Atlas cedar decline ant the ecological factors, components of the soil and dendrometric parameters except for the average circumference witch is influenced by the competition between trees. Therefor, a particular management plan for the regulation of competition is a necessity for this park.

COVID-19 and chimpanzees from a field perspective: Mitigation measures, ecological and economical situation after four months in Sebitoli, Kibale National Park, Uganda

2020 ◽  
Vol 27 (2) ◽  
pp. 16-20
Author(s):  
Sabrina Krief ◽  
Chloé Couturier ◽  
Julie Bonnald ◽  
John Paul Okimat ◽  
Asalu Edward ◽  
...  
Keyword(s):  
National Park ◽  
Kibale National Park ◽  
Mitigation Measures ◽  
Field Perspective

Simulation of the Performance of the Venturi Scrubber for an Advanced Reactor Containment Venting Conditions

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Goel Paridhi ◽  
K. Nayak Arun
Keyword(s):  
Numerical Model ◽  
Pressure Drop ◽  
Gas Flow ◽  
Pressure Profile ◽  
Absorption Efficiency ◽  
Severe Accident ◽  
Mitigation Measures ◽  
Liquid Loading ◽  
Venturi Scrubber ◽  
Iodine Absorption

Abstract Post Fukushima, nuclear plants are being retrofitted with severe accident mitigation measures. For attaining depressurization of the containment and mitigate the consequences of the release of the radioactivity to the environment during a severe accident condition, filtered containment venting systems (FCVS) are proposed to be installed in existing reactors and being designed for advanced reactors. The design of FCVS is particular to the reactor type. The FVCS configuration considered in this paper comprises of a manifold of venturi scrubber enclosed in a scrubber tank along with metal fiber filter and demister for an advanced Indian reactor. This study focuses on the assessment of the design of the venturi scrubber for the reactor conditions at which venting is carried out through a numerical model. The numerical model is first validated with experiments performed for prototypic conditions. The predicted pressure drop and the iodine absorption efficiency were found to be in good match with the experimental measurements. Subsequently, the model is implemented for predicting the hydrodynamics, i.e., pressure drop, droplet sizes and distribution, and iodine absorption for prototypic conditions. The hydrodynamics, i.e., pressure profile in the venturi scrubber showed a decrease in the converging section and in the throat section. The diverging section showed decrease in recovery of pressure with the decrease in gas flow because of the increased liquid loading to the scrubber. The iodine absorption efficiency showed a value of 92% for high gas velocity which decreased to 68% for the lowest gas flow rate.

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