Landscape modification due to rapidly expanding energy development, in particular oil and gas, in the westernUSA, have prompted concerns over how such developments may impact wildlife. One species of conservation concern across much of the Intermountain West is the greater sage-grouse (Centrocercusurophasianus). Sage-grouse have been petitioned for listing under provisions of the Endangered Spe...

As the technology of enhanced oil recovery by gas injection has already been applied worldwide, the research of the transmit mechanism between injected-gas and oil is important to the optimization of gas injection plan. Diffusion is an important phenomenon during the process of gas injection displacement. Because of diffusion, gas molecules will penetrate into the oil phase, while the oil will ...

A fluidized bed reactor that is operating in the bubbling regime has been developed for the conversion of bio-oils to syngas.The reactor consists of a 7.6 cm I.D. (or internal diameter) bed, with an expanded freeboard. The volume of the reactor can be adjusted to vary the gas residence time. This reactor has been used to carry out either thermal or catalytic cracking for reforming bio-oils.A ga...

pycnocycla caespitosa is an essential oil-containing plant naturally growing in southwest of iran. the extract of this plant has been used as remedy in traditional medicine. another species of pycnocyla ( p. spinosa ) possessed antispasmodic activity. the pharmacological objective of this study was to look for relaxant effect of hydroalcoholic extract and essential oil of p. caespitosa on rat i...

the volatile oil obtained by hydrodistillation of the aerial parts of matricaria chamomilla l. (asteraceae) growing in botanical garden, isfahan university of medical sciences, iran, was investigated by gas chromatography (gc) and gc/ mass spectrometery (ms). sixty-three components were characterized, representing 86.21% of the total oil components detected. α-bisabolol oxide a (25.01%) and a-b...

Implementation of hydraulic fracturing dramatically altered the fundamentals in the oil and gas markets. A new technology rst got implemented in the natural gas market, but by 2012 unprecedentedly low gas prices forced most exploration rms to switch to shale oil exploration. Large capital expenditure on drilling activity resulted in the growth of oil production in the US, and likely triggered t...

Girth weld cracking is one of the main failure modes in oil and gas pipelines; girth weld cracking inspection has great economic and social significance for the intrinsic safety of pipelines. This paper introduces the typical girth weld defects of oil and gas pipelines and the common nondestructive testing methods, and systematically generalizes the progress in the studies on technical principl...

The aim, in almost all industries, is to have a high level of automation to increase productivity and efficiency. Industrial robots, which have been one important technology enabler in achieving this aim, are designed to perform repetitive, heavy, dirty and dangerous tasks. Within the oil and gas industry, robots have been used in very specific niche applications where the main driver has been ...

a r t i c l e i n f o JEL classification: D44 L71 Keywords: Oil and gas lease auctions Asymmetric information National oil company This paper analyzes bidding behavior in oil and gas tract auctions in Brazil, where the main winner has been Petrobras, a national company. We test predictions from the theory of common-value, first-price, sealed-bid auctions with asymmetric information. The tests i...