Showing papers in "Journal of Petroleum Science and Engineering in 1997"

TL;DR: In this paper, a scaling equation has been used for rate of oil recovery by spontaneous imbibition and presented their results as oil recovery vs. dimensionless time, including identical core sample shapes and fluid viscosity ratios.

TL;DR: In this article, the authors presented the cause and effect mechanisms of such depositions and introduced mathematical models to be used for preventive measures in various cases of petroleum production, transportation, and processing.

TL;DR: The ability of microorganisms isolated from oil reservoirs to increase oil recovery by in situ growth and metabolism following the injection of laboratory grown microbial cells and nutrients was studied in this paper, where four strains isolated from Northern German oil reservoirs at depths of 866 to 1520 m, and identified as Bacillus licheniformis, were characterized taxonomically and physiologically.

TL;DR: In this paper, a two-dimensional geochemical simulator, CIRF.A, is presented for matrix acidizing analysis and design, which is based on the solution of the equations of fully coupled fluid flow, species transport and rock/fluid reactions.

TL;DR: In this paper, a new formulation which uses the Forchheimer equation to describe fluid flow through fractures and couples this equation with Darcy's law in order to describe flow through the matrix is presented.

TL;DR: In this article, high-pressure core flood experiments using gas condensate fluids in long sandstone cores were conducted to determine the effect of flow rate and interfacial tension on relative permeability.

TL;DR: In this article, the effects of the solution composition, temperature and the presence of a gas-liquid interface on spontaneous nucleation and the calcite crystal growth rate have been examined by using visual observations of crystal growth within a glass micromodel.

TL;DR: A generalized rheological model for shear thinning fluids has been developed in this article, which relates shear stress to shear rate for this type of fluids and predicts the behaviour of hyperbolic, parabolic, elliptic, and Newtonian fluids with or without yield stress at one or both extremes of the shear rates.

TL;DR: In this paper, the authors investigated the porosity of drilling fluid filter cakes by experiment and by modelling, as a function of the barite content of the cake and of the filtration pressure.

TL;DR: In this paper, a phenomenological model to simulate formation damage by dissolution/precipitation, ion exchange, fines migration and clay swelling is presented, which can be used for diagnosis, evaluation, and simulation of reservoir formation damage during drilling, production, and chemical flooding processes.

TL;DR: The complete thermodynamics of scale-forming minerals are discussed in detail in this paper, where the effects of temperature, pressure, and non-ideal solutions are analyzed, and the special case of CaCO 3 "scale" formation is considered.

TL;DR: In this paper, the authors developed new empirical PVT correlations for estimating the solution gas/oil ratio, bubblepoint oil formation volume factor, and isothermal oil compressibility above bubblepoint for crude oils.

TL;DR: In this paper, a model for massive continued sand production is developed by coupling fluid flow and granular matrix flow, which shows the typical significant fluid rate enhancement which accompanies continuous sand production.

TL;DR: In this article, a pre-flush of phenol is used to compensate for phenol partitioning in the formation, which is an effective method of compensating for the lack of retention of the gelant components on formation rock.

TL;DR: In this article, the effects of three types of alkalies on recovery of Safaniya crude oil of Saudi Arabia from sandpacks were studied, and three physical properties of the alkaline solutions were measured: the pH value, viscosity, and interfacial tension.

TL;DR: In this article, the authors measured the permeability of Indiana Limestone samples undergoing deformation in a triaxial cell along several stress paths such as Triaxial compression, hydrostatic compression and uniaxial strain using the oscillating pulse technique.

TL;DR: In this article, the applicability of the boundary element method to this class of problems is studied, where the free-space Green's function satisfying two-dimensional pressure diffusion equation in the Laplace space is used as a weighting function for the Green's second identity integral equation.

TL;DR: In this paper, the authors focus on the investigation of pressure responses in a well producing through a composite system of a stress sensitive vertical symmetric or asymmetric fracture interacting with a stress-sensitive permeable-porous medium.

TL;DR: In this article, the effects of several key parameters (e.g., wettability, saturation history and measurement methods) on the water-oil relative permeability in a mixed-wet reservoir rock were evaluated.

TL;DR: In this article, a novel sweep improvement process which utilizes the chromatographic and phase behavior of dissimilar surfactants and their mixtures to plug high-permeability "thief zones" is presented.

TL;DR: In this article, the effect of variation of porosity at a microscopic level on cementation exponent m was computed using the effective medium theories, and it was found that solution pores or vugs lead to an increase in the cementing exponent m, whereas large grains such as filled solution pores lead to a decrease in m.

TL;DR: In this article, low-molecular-weight compounds that complex strongly with Ca2+ and Mg2+ are capable of neutralizing their destabilizing influence on polymer solubility and of inhibiting the syneresis of crosslinked acrylamide polymer gels in hard brines.

TL;DR: In this article, the application of a simultaneous steam-CO2 drive process and the examination of vertical and horizontal injection-and-production well configurations was conducted in a physical model of 1/12th of an inverted regular seven-spot pattern to determine the recovery performance of 12.4°API heavy oil.

TL;DR: In this article, a chemical flood simulator (UTCHEM) was used to study the performance of immiscible displacement with horizontal and vertical wells in several heterogeneous reservoirs, and three-dimensional heterogeneous permeability fields were generated geostatistically with Dykstra-Parsons coefficient and spatial correlation as characterizing parameters.

TL;DR: In this paper, the authors proposed a new method for identifying hydraulic flow units in shaly sand reservoirs based on the application of several shaly-sand models, including the Coates-Dumanoir, and Waxman and Smits models, Coates and Denoo, and Morris and Biggs correlations, and the Simandoux model.

TL;DR: In this article, the authors describe development of a model of oil flow when microwave technology is used to heat the reservoir, and the solutions are given with two levels of simplification.

TL;DR: For an arbitrary neural network architecture, combination of KL decomposition and ANN is found to be superior over ANN alone and eliminates iterative procedures needed for optimizing the neural network topology.

TL;DR: A simple model of a sucker-rod pumping system is presented, and performance and applications of the model are outlined, and example results indicate significant savings over unoptimized operation.

TL;DR: In this article, a set of partial differential equations which consider the combined effects of fluid column, sucker-rod string and tubing motion were developed to describe the motion of a pumping system.

TL;DR: In this article, transient flow rates into perforations in Berea Sandstone have been measured, varying underbalances and surge flow volume, and flow rate, instantaneous core flow efficiency and local flow velocity are reported as a function of time, starting ∼ 0.5 s after firing.