The Ohaaki Geothermal field is situated in the Taupo Volcanic Zone of New Zealand. It was the second geothermal field in New Zealand to be developed and is used primarily for electricity generation. Wells were first drilled in the Ohaaki field during the early 1960’s. After a period of well testing following drilling, there was a long period of field recovery until steam production for electric...

Hydrocarbon wells drilled vertically through longwall coal pillars are vulnerable to severe deformation and potential failure as a result of underground coal mining. The lithology of the host rocks play a critical role in well stability. In this study, a two dimensional finite element method is employed to investigate the horizontal shear offset, vertical delamination, and compression at the we...

This is an interview conducted with an oil and gas worker who was employed in the industry from 1993 to 2012. He requested that his name not be used. From 2008 to 2012, he drilled wells for a major operator in Bradford County, Pennsylvania. Bradford County is the center of the Marcellus shale gas boom in Northeastern Pennsylvania. In 2012, he formed a consulting business to assist clients who n...

Hydraulic fracturing has become the method of choice for extracting natural gas from shale deposits in the United States. As time has passed, environmental concerns have been raised as a result of research from the EPA and independent organizations, though most of it has focused strictly on the consequences this has for human health and land use, and little has focused on its effects on trophic...

The movement and the flow velocity of groundwater were determined from data obtained from ten wells drilled in Derince district of Kocaeli, İzmit, Turkey. The data were determined on the basis of Darcy’s law. The depths and groundwater levels of the wells ranged from 16 to 115 m and from 3.90 to 25.10 m, and the maximum and the minimum discharge rates were determined to be 604.8 and 172.8 m3 da...

Community water supply programmes in developing countries frequently utilise wells or boreholes equipped with handpumps as the technology of choice. Whilst simple targets concerning numbers of wells to be drilled, or villages to be served, are often prominent, the wider objectives of such programmes are rarely expressed in quantified terms, and as a consequence programme impact is often disappo...

Improperly abandoned gas wells threaten human health and safety as well as pollute the air and water. In the next 20 years, tens of thousands of new gas wells will be drilled into the Marcellus, Utica, and Upper Devonian shale formations of Pennsylvania. Pennsylvania currently requires production companies to post a bond to ensure environmental reclamation of abandoned well sites, but the size ...

nowadays, by complication of production mechanisms from reservoirs and depletion of most of the reservoirs in iran, secondary production has become more important. regarding the nature of iranian reservoirs and carbonate inherencies and diagenetic and tectonic effects on these reservoirs, we see heterogeneities in them which cause uncertainty in predictions and performance of these reservoirs. ...