intravenous hydralazine is a commonly administered arteriolar vasodilator that is effective for hypertensive emergencies associated with pregnancy. oral nifedipine is an alternative in management of these patients. in this study the efficacy of nifedipine and hydralazine in pregnancy was compared in a group of iranian patients. fifty hypertensive pregnant women were enrolled in the study. a ran...

Abstract Multi-gas assisted steam huff and puff process is a relatively new thermal recovery technology for offshore heavy oil reservoirs. Some blocks of Bohai oilfield have implemented multi-gas process. However, the development mechanism still requires further study. In this paper, high-temperature high-pressure (HTHP) PVT experiments different sand pack were carried out to reveal enhanced pr...

The meteorological conditions during the period of spring transition over the Middle East and the Persian Gulf and adjacent land area is investigated. Monthly and seasonal variations of large-scale atmospheric patterns and wind aloft features at different levels were drawn from data collected from the National Centers for Environmental Prediction and National Center for Atmospheric Researches. ...

Asphaltene deposition in the pore-throats of reservoir rock reduces permeability, which leads to a reduction oil production. The amount deposited asphaltene is generally expressed by an equation that sums three types deposition: surface deposition, pore-throat plugging, and entrainment asphaltene. plugging accelerated increase asphaltene, termed snow-ball effect. Wang Civan's model commonly use...

During production from oil wells, the deposition of asphaltene and wax at surface facilities porous media is one major operational challenges. The crude rate significantly reduced due to inside reservoir. In addition, these solids costly companies. this study, efficiency different solvents in dissolving was investigated through static dynamic tests. analysis solid deposits choke Iranian carbona...

The heavy crude oil consists of thousands of compounds and much of them have large molecular weights and complex structures. Studying the aggregation and diffusion behavior of asphaltenes can facilitate the understanding of the heavy crude oil. In previous studies, the fused aromatic rings were treated as rigid bodies so that dissipative particle dynamics (DPD) integrated with the quaternion me...