The hydro-swelling of smectite clay minerals in low-permeability reservoirs further decreases the reservoir permeability and results low oil recovery. Currently, traditional chemical anti-swelling agents are widely used, but most them only effective short term not environmentally friendly. Here, we report use Fe(III) reducing microorganisms (FeRM) as a novel green agent to enhance recovery from...

Abstract Gum arabic (GA) capacity as an enhanced oil recovery (EOR) agent is studied and compared to the commonly applied xanthan gum (XG). FTIR TGA characterisation of these two polyelectrolytes a rheology study by viscosity measurement was conducted on their polymeric nano-polymeric solution at varying concentrations polymers nanoparticles (NP). Coreflooding experiments were based sequence wa...

This study examines the effects of change in the concentrations of monovalent and divalent ions in the polymer-contained surfactant solution on the macroscopic behavior of viscous-modified surfactant waterflooding in heavy oil reservoirs. Salts that are used in this set of floods were sodium chloride, magnesium chloride, and calcium chloride. The results indicate that four different ranges ...

We present an integrated approach to imaging the progress of air displacement by spontaneous imbibition of oil into sandstone. We combine Computerized Tomography (CT) scanning and neural network image processing. The main aspects of our approach are I) visualization of the distribution of oil and air saturation by CT, 11) interpretation of CT scans using neural networks, and III) reconstruction...

Due to the influence of long-term waterflooding, reservoir physical properties and percolation characteristics tend change greatly in offshore unconsolidated sandstone reservoirs at ultrahigh water-cut stage, which can affect remaining oil distribution. Remaining characterization proper development strategy-making are vital importance achieve high-efficiency mature reservoirs. The present numer...

Abstract Channeling between injectors and producers leads to bypassed oil left in the reservoir, which is one of most common reasons that wells mature fields experience high water cut after long-term waterflooding. Identification evaluation higher permeable channels (thief zones) are key effectively plug these thief zones improve conformance flood. This study applies three different methods ide...

Zeta potential has been proposed as a key parameter for predicting the response of controlled salinity waterflooding, correlation with additional oil recovery previously established. However, it is unclear if there causal effect and this can be used unique predictive tool. We provide new insights detailed investigation into role change polarities oil/water/rock interfaces on recovery. Core floo...

This report examines the potential of polymer flooding to recover viscous oils, especially in reservoirs that preclude the application of thermal methods. A reconsideration of EOR screening criteria revealed that higher oil prices, modest polymer prices, increased use of horizontal wells, and controlled injection above the formation parting pressure all help considerably to extend the applicabi...