In this paper, taking account of the major physical and chemical mechanisms, such as: for polymer, shearing propertypermeability reduction, adsorption, inaccessible porous volumes, for gel, gelation speed, water viscosity changing with gel, permeability reduction, adsorption and retention in reservoir rocks, a three-dimensional, three-phase (oleic, vapor, aqueous) and six-component mathematical...

Introduction Copyright 2004, Society of Petroleum Engineers Inc. There are many aspects of hydrocarbon production processes where understanding the flow of non-Newtonian fluids in porous media is of great interest. These include well drilling and construction, reservoir stimulation and production. In particular, complex polymeric solutions have been used for water-control purposes or to enhanc...

This work presents the design, fabrication, and testing of a cross-flow filtration microdevice, for the continuous extraction of bacteria from a whole blood sample for the treatment of sepsis and bacteremia. The system consists of a two-compartment microdevice with two aligned sets of PDMS microchannels, separated by a porous polycarbonate (PCTE) membrane with 2 m pores. When a whole blood sam...

diffusivity equation commonly used for pressure distribution prediction in porous media results from substituting equation of state and continuity equation in navier-stokes momentum equation. from mathematical point of view this equation format shows infinite propagation speed for pressure pulse through porous media, which is physically impossible. this issue may caused by numerous assumptions ...

It is common knowledge in the oil industry that the typical cost of drilling a new ooshore well is in the range of $30-40 million, but the chance of that site being an economic success is 1 in 10. Recent advances in drilling technology and data collection methods have led to oil companies and their ancillary companies collecting large amounts of geophysical/geological data from production wells...

Evaporation of saline solutions from a porous medium often leads to the precipitation of salt at the surface of the porous medium. It is commonly observed that the crystallized salt does not form everywhere at the porous medium surface but only at some specific locations. To explain this phenomenon, we consider efflorescence formation at the surface of a saturated heterogeneous porous column (f...

In this paper a new class of reservoir models that are developed based on the pattern recognition technologies collectively known as Artificial Intelligence and Data Mining (AI&DM) is introduced. The workflows developed based on this new class of reservoir simulation and modeling tools break new ground in modeling fluid flow through porous media by providing a completely new and different angle...

Heat extraction mode, e.g. well layout or arrangement of wells, of enhanced or engineered geothermal system (EGS) is crucial to its performance and directly affects its commercial viability. Assuming the subsurface target hot dry rock (HDR) has been well-fractured and the created heat reservoir can be treated as a homogeneous porous medium, we numerically simulate the long-term heat extraction ...

The S reservoir in the X Oilfield Iraq has great development potential due to its rich geological reserves. However, low permeability and strong heterogeneity of lead differences stimulation performance. In this study, an integrated model differential mode are put forward solve above problems. First, feasibility fracturing is evaluated by laboratory experiments. Second, established, which mainl...

Electric propulsion systems using electrospray ion sources are a scalable and high specific impulse technology which could enable small spacecraft to perform high ΔV missions. This paper presents an overview of a recently developed source design which achieves 10’s of μN of thrust at less than 1 W of input power with a specific impulse up to ∼3000 s. Demonstration devices, fabricated convention...