Microbial communities in shale oil fields are still poorly known. We obtained samples of injection, produced and facility waters from a Bakken shale oil field in Saskatchewan, Canada with a resident temperature of 60°C. The injection water had a lower salinity (0.7 Meq of NaCl) than produced or facility waters (0.6-3.6 Meq of NaCl). Salinities of the latter decreased with time, likely due to in...

Polyacrylamide (HPAM) and other traditional polymers have poor temperature resistance salinity tolerance do not meet the needs of high-temperature high-salinity reservoirs. In this study, a new temperature-resistant salinity-tolerant polymer QJ75-39 was synthesized using acrylamide (AM) as hydrophilic monomer, 1-acrylamide-2-methylpropanesulfonic acid (AMPS) N-vinylpyrrolidone (NVP) functional ...

Low-salinity brine injection has emerged as a promising, cost-effective improved oil recovery (IOR) method for waterflooding reservoirs. Laboratory tests and field applications show that low-salinity waterflooding could lead to significant reduction of residual oil saturation. There has been a growing interest with an increasing number of low-salinity waterflooding studies. However, there are f...

Mature oilfields usually encounter the problem of high watercut. It is practical to use chemical methods for water-shutoff in production wells, however conventional water-shutoff agents have problems of long gelation time, low gel strength, and poor stability under low temperature and high salinity conditions. In this work a novel polymer gel for low temperature and high salinity reservoirs was...

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...

chemical flooding, especially alkaline/surfactant/polymer flooding, is of increasing interest due to the world increasing oil demand. this work shows the aspects of using alkaline/surfactant/polymer as an enhanced oil recovery method in the porous media having a high dead-end pore frequency with various dead-end pore parameters (such as opening, depth, aspect ratio, and orientation). using glas...

Abstract Trinidad and Tobago (TT) have been producing crude oil commercially since 1908. For the past few decades, TT’s production has in steady decline because most of reservoirs are beyond primary phase their production. This situation coupled with lower energy prices resulted a shortfall revenues presents TT major economic challenges. The objective this study was to optimize field simulation...