Forthcoming articles


International Journal of Petroleum Engineering


These articles have been peer-reviewed and accepted for publication in IJPE, but are pending final changes, are not yet published and may not appear here in their final order of publication until they are assigned to issues. Therefore, the content conforms to our standards but the presentation (e.g. typesetting and proof-reading) is not necessarily up to the Inderscience standard. Additionally, titles, authors, abstracts and keywords may change before publication. Articles will not be published until the final proofs are validated by their authors.


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International Journal of Petroleum Engineering (3 papers in press)


Regular Issues


    by Gbenga Oluyemi, Tomilayo Afolabi 
    Abstract: Hydraulic fracturing (fracking) of shale resources has become a trend in the oil and gas industry that is associated with exorbitant costs. This calls for certainty in the productivity and success of every fracture stimulation program. Current fracking practices rely mostly on a geometric design and evaluation of vertical well sections and pilot holes to predict properties along wellbore laterals. Consequently, there is a reduction in the efficiency of fracture stimulation programs and productivity of shale reservoirs. This problem is associated with the fact that shale reservoirs are anisotropic, possessing directional properties that cannot be accurately predicted as such. In order to increase the efficiency of fracture stimulation, considerations have to be given to the anisotropic tendencies of shale petrophysical and geomechanical properties along wellbore laterals where fractures are hydraulically induced. In this study, an approach for the accurate quantification of vertical transverse isotropy (VTI) and resultant anisotropic properties along shale wellbore laterals using an LWD azimuthal sonic log was investigated. Using the case study of a Marcellus shale well in Northeastern Pennsylvania having azimuthal sonic data, a work flow for obtaining anisotropic properties, critical to fracture stimulation design was developed. An algorithm for the characterization of wellbore geomechanical quality based on estimated VTI anisotropy, anisotropic closure stress and brittleness was also developed.
    Keywords: Fracking; shale resources; anisotropy; stimulation; petrophysical properties; geomechanical properties.

  • Experimental Research on Phase Behavior and Vapor/liquid Equilibrium of N2 and Heavy Oil System   Order a copy of this article
    by Fangfang Li 
    Abstract: In the process of N2 injection, the dissolution and diffusion of N2 into oil will change the physical properties of crude oil and enhance oil recovery. In this paper, two experimental procedures are investigated to measure phase behavior and equilibrium features of crude oil and injected N2. The dynamic miscibility experiment was conducted to obtain N2-Oil phase behavior and physical property change data, while the static miscibility experiment was conducted to simulate the vapor/liquid equilibrium process features. The result of dynamic miscibility experiment showed that it is difficult to achieve miscible displacement for N2 injection due to the low solubility and low extraction capability of N2; however, the solution of N2 can reduce oil viscosity and IFT, and the high compressibility coefficient of N2 can implement the displacement energy to obtain higher oil producing rate. The static miscibility result indicated that N2 dissolved in crude oil through a contacting interface and then diffused in deeper part of oil, contacting time and equilibrium pressure are key influence parameters to vapor/liquid equilibrium features.
    Keywords: phase behavior; equilibrium features; N2 and heavy oil system; dissolving and diffusing mechanism.

  • Sand control in oil and gas wells using slotted and perforated tubing design   Order a copy of this article
    by Pritish Barman, Dhiraj Kumar Deka, Nirupam Dhekial, Biki Saikia, Bhaskar Jyoti Gogoi 
    Abstract: Sand Production is a prevalent problem associated with continued production of hydrocarbon in unconsolidated sandstone reservoir. As sand accumulates in the bottom-hole over time, it reduces permeability, chokes flow line and well-head equipment, and increases complexity of handling. Gravel packing, sand screens, and cementation are some of the widely implemented methods to prevent sand production. However, due to stress, wear and tear, pressure and temperature exposure at the bottom hole, these methods fail to provide adequate sand retention. It is often uneconomical to refurbish a marginal well by executing complex remediation jobs, thus most of the mature wells producing marginally are abandoned prematurely. To address this issue, a tubing attached secondary sand screen can reduce the need of expensive intervention jobs by preventing sand incursions into the tubing. The challenge here is to improve the effective inflow area of the secondary screen without compromising the mechanical strength of the tubing.
    Keywords: Sand control; Sand screen design; Slotted tubing; Perforated tubing; Sand screen modification; Slotted Tubing; Perforated Tubing; Economic Sand Control.