Naturally fractured gas reservoirs have contributed significantly to global reserves and production. The classical gas-well decline analysis relies largely on Arps’ empirical models, or modern production associating with pseudo-variables. explicit original in place determination methodology is extended from homogeneous reservoir naturally under constant variable bottom-hole pressure conditions ...

One of the most important of the many achievements of Willard Gibbs was the derivation of a single equation of universal validity, by which the properties of a macroscopic system in equilibrium could be expressed in terms of the submicroscopic mechanical properties of the molecules composing it. I wish to discuss the present status of the methods of numerical evaluation of one problem using thi...

Kinetics of CH2OO Criegee intermediate reactions with SO2, NO2, NO, H2O and CH3CHO and CH2I radical reactions with NO2 are reported as a function of pressure at 295 K. Measurements were made under pseudo-first-order conditions using flash photolysis of CH2I2-O2-N2 gas mixtures in the presence of excess co-reagent combined with monitoring of HCHO reaction products by laser-induced fluorescence (...

  Performance and capacity of sulfur recovery unit (SRU) are greatly affected by the H2S:CO2 ratio of the acid gas stream. The acid gases in Iran contain around 35 mol% H2S and 60 mol% CO2. This low concentration of H2S calls for more complex sulfur plant, larger equipments, and higher costs. Acid gas enrichment processes (AGE) is run to upgrade low quality acid gas collected from gas treating...

The SAFT-VR equation of state is combined with a semi-continuous thermodynamic approach to model several synthetic and crude oil systems. In our approach, the oil fractions are defined by a continuous distribution that is then represented as discrete pseudo-components using the Gaussian quadrature method. The SAFT-VR parameters for the pseudo-components are obtained from simple linear relations...

In the present work, B-ZSM-5 zeolite membranes were synthesized on porous tubular α-alumina supports by several subsequence in situ crystallization hydrothermal treatments. The TiO2- Bohmite and ɣ- alumina intermediate layers were applied to improve the lattice matching between zeolite layer and the support. The uniform membrane intermediate layers with low permeation resistance were...

INTRODUCTION: Acute Respiratory Distress Syndrome (ARDS) is a critical lung disorder characterized by impairment of respiratory mechanics and gas exchange. ARDS can lead to inflammation in the alveoli, and eventually to atelectasis (alveolar collapse) and gas exchange deficiency. Alveolar recruitment maneuvers with varying and fixed positive end-expiratory pressure (PEEP) values have been devis...

hydrates are crystalline compounds similar to ice, with guest molecules like methane and ethane trapped inside cavities or cages formed by the hydrogen bounded framework of water molecules. these solid compounds give rise to problems in the natural gas oil industry because they can plug pipelines and process equipments. low dosage hydrate inhibitors are a recently developed hydrate control tech...