... Abstract This study investigates the dynamic adsorption behavior of an ATBS-rich hydrolyzed polyacrylamide (HPAM) polymer onto two different permeability carbonate rocks under varying salinity and high temperature conditions. The approach followed here is aimed at unraveling the complexities...

... samples exhibited extremely low permeability, resulting in a drastic reduction in flow capacity. The reservoir primarily consists of quartz, clay minerals (kaolinite, illite, smectite), feldspar, and carbonates. Single-phase injection of low salinity water (SIIW) further reduced permeability and increased...

... water", which contained 2435-ppm total dissolved solids (TDS), including 128-ppm calcium and 11-ppm magnesium. The current work expands the study of the "tailing" phenomenon to include salinities from 2400-to 27600-ppm TDS, divalent cation concentrations from 0 to 6000-ppm, and ATBS content...

... Abstract The hybrid low-salinity polymer (LSP) injection technique has potential for significant synergistic advantages as an enhanced oil recovery (EOR) approach. Previous studies indicated that LSP-injection appreciably improves polymer rheology, injectivity, viscoelasticity, and displacement...

... the Environmental Protection Agency and previously published papers. We investigated the following high salinity water treatment methods: high pressure reverse osmosis (HPRO), electrodialysis (ED), and direct contact membrane desalination (DCMD). Under the assumptions of our study, we found that disposal costs...

... and adsorption testing of the CND supported colloidal stability and mobility at extreme saline, temperature and pressure conditions in carbonate reservoir conditions ( Kanj et al., 2011 ). Six different types of surfactants were included in the analysis. These are alpha olefin sulfonate (AOS), sodium dodecyl...

... from a gravel pit nine miles away and followed by high salinity post flush. All the injection facilities were set up such that the injection pumps never ran dry. The surveillance program was planned in such a way that measurements of water cut, oil and the chemical analysis of the produced water were...

..., in the absence of crude oil, was obtained for these surfactant formulations at their respective optimum salinities. NaPA was then added to these surfactant formulations and similar adsorption tests were conducted. Finally, oil recovery SP corefloods were conducted for each surfactant formulations...

... the effect of hardness, salinity, and heavy metals and remain stable at various shear rates (66–330 s −1 ). No treatment was done on the Bakken produced water except filtration and dilution. intervención de pozos petroleros enhanced recovery downhole intervention us government waste management...

... gravity with acid number equaling 2.1 mg of KOH/gm. The average porosity and permeability of core samples were found to be approximately 20% and 6 md respectively. XRD and FESEM analysis showed the presence of silica, quartz and smectite clays in the rock samples. The total salinity based on the ionic...

... Abstract In Steam Assisted Gravity Drainage (SAGD) operations, condensed water dissolves the formation minerals and mixes with formation water, and its salinity changes over time. For the salinity levels below a critical salt concentration, brine reacts with the formation clays and affects...

... scaled as appropriate. This diameter was chosen to minimize wall effects while permitting rapid testing of numerous variables. Feed water (fresh or saline) was sourced from a storage tank and delivered to the filter through a poly line and gear pump. The gear pump was operated at a fixed speed...

... Abstract Double layer Expansion (DLE) is proposed as one of the mechanisms responsible for Improved Oil Recovery (IOR) during Low Salinity Water Flooding (LSWF). This expansion is triggered by the overlap between the diffuse double layers. We performed molecular simulation to study...

... and structural forces are independent of the water film salinity and surface potentials, these forces affect the contact angle. In other words, while VdW and structural forces affect contact angle, changes in the contact angle due to changes in water chemistry are controlled by EDL forces. Contact angle...

... Abstract Assessment of the potential of polymer flooding and gel treatment to investigate their roles of improving sweep efficiency requires an accurate modeling of polymer rheology (polymer viscosity versus shear rate) coupled with the effects of water salinity. A 3-D simulation model...

... Abstract The conventional method for describing transport of solutes such as salt, polymer and tracers is to use the mass conservation law. In simulation of this law for Low Salinity Water Flooding (LSWF), the effective salinity range defines how salt affects the mobility of water and appears...

... Abstract The effect of water chemistry on water-rock interactions and wettability modification during (low ionic strength) low salinity (LS) waterflooding of sandstone cores containing heavy and light oil was investigated. Results are reported from both coreflooding experiments and through...

... Abstract The recovery of oil from carbonate reservoirs is usually low due to their extreme heterogeneity caused by natural fractures and the nature of the oil-wet matrix. Low salinity water flooding (LSWF) and preformed particle gels (PPGs) control conformance are two novel technologies...

... reservoir. The first field-scale tests of this technique were conducted by BP in the Endicott reservoir on the North Slope and produced good results by lowering the salinity of injection water. Those tests showed that alteration to injection water chemistry can increase recovery significantly...

... Abstract Destabilized asphaltenes cause serious problems by precipitating in the reservoir pores which reduces the oil flow by decreasing the reservoir porosity and permeability significantly. This study investigates the impact of clays and salinity on the stability of asphaltenes for five...