Showing papers in "Journal of Petroleum Science and Engineering in 2011"

TL;DR: In this article, the current and innovative technological solutions covering viscosity and friction reduction to move heavy and extra-heavy crude oils from the production site to the processing facilities are thoroughly discussed.

TL;DR: An experimental study of nanofluids intended for enhanced oil recovery is presented in this paper, where an aqueous solution of anionic surface-active agents with addition of light non-ferrous metal nanoparticles was used as the focus of the study.

TL;DR: In this paper, the use of high resolution SEM in combination with argon ion beam cross sectioning (BIB, Broad Ion Beam) was explored to image porosity down to 10nm.

TL;DR: In this paper, the authors present an EOR database based on numerous reported EOR projects, which includes reservoir rock and fluid properties in addition to other project attributes related to oil saturations, incremental recovery, demography, and project start date.

TL;DR: A review of existing explicit approximation of the implicit Colebrook equation with estimated accuracy is shown in this article, where most of the available approximations are very accurate with deviations of no more than few percentages.

TL;DR: In this paper, the authors investigated the shale hydration inhibitive properties of polyether diamine (PEDA) in drilling fluid system and showed that the inhibition properties of PEDA are superior to potassium chloride, and can be improved with decrease of pH value.

TL;DR: In this paper, the authors presented experimental data for the flow of bentonite-water dispersions, modeled as Herschel-Bulkley fluids, for the pressure loss at different flow rates covering laminar, transitional and turbulent flow regimes, while flowing in concentric and fully eccentric annuli.

TL;DR: In this article, a multiple-continuum conceptual model is presented, based on geological data and observations of core samples from carbonate formations in China, to investigate single-phase and multiphase flow behavior in such vuggy fractured reservoirs.

TL;DR: In this article, the authors proposed a modified K-C correlation by handling the tortuosity term in a more robust manner, which showed that more permeability variations are to be expected within a given HFU.

TL;DR: In this paper, the extent of oil recovery from Berea sandstones subjected to long term exposure of crude oil is influenced by low salinity water injection and combined process low saliency water injection with surfactant flooding.

TL;DR: In this paper, the adsorption of anionic and amphoteric surfactants onto the kaolinite has been studied by both static and dynamic methods, and the results showed that anionic surfactant adsorbs at a high rate than anionic, which is attributed to the strong electrostatic interaction between the negative charge on the surface of the kolinite and the cationic charge in the head of an amphoteric molecule.

TL;DR: The results indicate that the proposed two-layer MLP network can identify the reservoir models with an acceptable accuracy.

TL;DR: In this article, the relation between the Reynolds number and differential producer discharge coefficient was obtained through solutions to the steady, Reynolds-averaged Navier-Stokes equations, and discharge coefficients were also obtained experimentally for the purpose of validating the numerical results.

TL;DR: In this article, the authors investigate single-phase oil/water flow in ultra-low permeability cores, using a capillary flow meter to achieve accurate measurement of fluid volume, and they confirm that the single phase oil and water flow in ULP cores is not consistent with Darcy's Law.

TL;DR: In this article, the results of fluid flow experiments carried out for air flow through a fractured granite sample under various pressures of confinement are presented, showing that the cubic law appears to be applicable for flow cases that return a Forcheimer number for non-Darcian flow cases where inertial effects were modest.

TL;DR: Comparison between the obtained results shows that the improved method presented has better performance rather than empirical and current methods in neural network designing in petroleum applications for these predictions.

TL;DR: In this article, a constitutive equation based on concepts used to model a continuous time random walk (CTRW) is described, which does not assume Darcy-like flux behavior for the evolution of the pressure distribution and is global in character.

TL;DR: The results demonstrate that carefully designed hybrid artificial bee colony-back propagation neural network outperforms the gradient descent-based neural network.

TL;DR: In this article, the authors used fine grids to analyze a base case that involves a conventional vertical well with a 5m-long production interval in the saturated water zone (WZ) that begins at the hydrate-baring layer (HBL) underlain by a saturated water layer (WL), and determined that the base case can yield large volumes of gas that are produced at high rates (reaching a maximum of over 6 MMSCFD, and an average of 3.11 MMS CFD over the entire production period).

TL;DR: In this article, the influence of the flow regimes on the performance of air-water two-phase flow in a vertical pipe with a diameter of d = 50mm and an aspect ratio of L/d = 120.

TL;DR: Zhang et al. as discussed by the authors studied the effects of fines migration induced by injection of water with a different salinity than the reservoir brine, and incorporated the upscaling model for waterflooding in a layer cake reservoir with good communication between the layers.

TL;DR: In this paper, a finite element-based procedure is proposed for the modeling of hydraulic fracturing of heterogeneous rocks on a macroscopic scale, where the fracture and the rock are represented unified on the same regular finite element grid and the numerical solutions of pressure and displacement are verified against exact 1D results.

TL;DR: In this paper, the effects of Darcy number (Da), Deborah number (De), Schmidt number (Sc), and transpiration Reynolds number (ReT) on velocity and species concentration distributions and also wall shear stress and concentration gradients are examined in detail.

TL;DR: In this paper, the inertial coefficient β and permeability of non-Darcy flow were investigated on natural and artificial unconsolidated porous media (glass beads and loose natural sands of different grain size).

TL;DR: In this article, lattice Boltzmann method (LBM) is employed for analyzing the two-fluid flow in rigid porous media, which proved to be a robust numerical tool for analyzing factors that influence the relative permeabilities of two immiscible fluids flowing through porous media.

TL;DR: In this article, a new model was developed and used to determine the rheological properties of drilling muds and other non-Newtonian fluids using data of fluid volume collected from a Marsh funnel as a function of time.

TL;DR: In this paper, the authors explored the interrelationship between these properties and found the best condition(s) for combined low interfacial tension and low retention in a surfactant flooding process.

TL;DR: This study presents an approach that employs an Improved Harmony Search algorithm in combination with streamline simulation to determine the optimum well locations in a reservoir and demonstrates the superiority of IHS algorithm over the other mentioned algorithms in providing fast and accurate solutions.

TL;DR: A new stochastic approach for assisted history matching based on a continuous ant colony optimization algorithm that guides the colony towards models that match the desired behavior in the production history of the reservoir.

TL;DR: In this paper, an artificial neural network (ANN) model was proposed for predicting the bottomhole flowing pressure and consequently the pressure drop in vertical multiphase flowing wells in Iran.