Showing papers by "Fengrui Sun published in 2017"

TL;DR: In this article, a model is proposed for predicting thermo-physical properties of superheated steam (SHS) in SHS injection wells and for estimating wellbore heat efficiency.

TL;DR: In this paper, the authors employed the Beskok's models to characterize the bulk-gas transport mechanisms through circular nanotubes or slit nanopores with arbitrary aspect ratio, respectively.

TL;DR: A mathematical model comprised of mass, energy and momentum balance equations is proposed for OSSIW and shows that the superheat degree increases at first but then turns to decrease with the increase of injection rate and pressure.

TL;DR: In this paper, the authors presented a novel model for predicting thermophysical properties of SMTF in concentric dual-tubing wells (CDTW), based on real gas state equation, a model comprised of mass, momentum and energy balance equation in the integral joint tubing and annuli was proposed for CDTW.

TL;DR: In this paper, a series of theoretical studies were conducted to estimate the distributions of temperature and pressure of superheated steam (SHS) in offshore horizontal wells, based upon the mass, energy and momentum conservation equations in wellbores, and heat transfer models in seawater and formation, a mathematical model is established.

TL;DR: In this article, a comprehensive method for drainage and desorption area expansion during coal-bed methane production is proposed, in which the variable rate and bottom-hole pressure (BHP) in different production stages and saturation distribution are considered.

TL;DR: In this paper, a flow model inside the wellbores was proposed based on the energy and momentum balance equations, coupled with heat transfer model in formation or atmosphere, a comprehensive model was developed.

TL;DR: In this article, a novel mathematical model is proposed to analyze the flow behaviors of superheated multi-component thermal fluid (SMTF) in the perforated horizontal wellbores (PHWs).

TL;DR: In this paper, a numerical model is presented to estimate the thermophysical propertes of superheated steam (SHS) in concentric dual-tubing wells (CDTW).

TL;DR: In this paper, a novel model is proposed for heated radius calculation and production performance analysis of cyclic superheated steam stimulation (CSHSS) wells, and the results indicate that the positive effect of residual heat on cyclic productivity improvement is offset by pressure drop and oil saturation drop.

TL;DR: In this paper, a model comprised of mass, energy and momentum conservation equations are developed for estimating pressure and temperature in wellbores when CO2 and superheated steam (SHS) are co-injected.