Migration and plugging laws of plugging-selection balls in fine profile control process of layered waterflooding wells.

The ball-pitching plugging-selection profile control technology represents an effective and low-cost means of adjusting the profile of waterflooding well. The technology primarily utilizes polymer balls to plug the perforations, thereby achieving the effect of fine profile control. This paper aims to elucidate the migration and plugging laws of plugging-selection balls in wellbore and perforation plugging processes.

Unstable Coalescence Mechanism and Influencing Factors of Heterogeneous Oil Droplets.

The use of a surfactant solution during oil and gas field development might improve the recovery rate of oil reservoirs. However, the serious emulsification of the produced liquid will bring challenges to the subsequent treatment process and storage and transportation. It is urgent to understand the coalescence mechanism of crude oil under the action of surfactant solution.

Study on the treatment of oily wastewater by evaluating the growth process of aggregates in an electrocoagulation reactor.

Electrocoagulation has been widely studied in oily wastewater treatment because of its high demulsification efficiency and no secondary reagent is required. Oil removal largely depends on the properties of the aggregates. This study aimed to explore the growth process of aggregates and oil removal near the anode by electrocoagulation.

FeCoS polyhedral spherical nanoparticle decorated nitrogen doped hollow carbon nanofibers as high-performance self-supporting anodes for K-ion storage.

Herein, we present a freestanding and flexible 3D nanocomposite made of polyhedral spherical FeCoS and nitrogen-doped hollow carbon nanofibers (FeCoS@N-HCNFs) that is synthesized through coaxial electrospinning, high-temperature calcination, and a facile solvothermal process. As a binder-free anode composite for potassium-ion batteries (PIBs), FeCoS@N-HCNF presents a high specific discharge capacity on the first lap (701.2 mA h g at 100 mA g) and superior cycling stability (132.

Using starch graft copolymer gel to assist the CO huff-n-puff process for enhanced oil recovery in a water channeling reservoir.

The CO huff-n-puff process is an effective method to enhance oil recovery (EOR) and reduce CO emissions. However, its utilization is limited in a channeling reservoir due to early water and gas breakthrough. A novel starch graft copolymer (SGC) gel is proposed for treating the channels and assisting with the CO huff-n-puff process.

Interaction and spatio-taxonomic patterns of the soil microbiome around oil production wells impacted by petroleum hydrocarbons.

Numerous onshore oil production wells currently exist, and the petroleum hydrocarbon contamination of the surrounding soil caused by oil production wells is not well understood. Moreover, the impact of the distribution of the total petroleum hydrocarbons (TPH) in the soil on the microbiota requires further investigation. Accordingly, in this study, the distribution of petroleum hydrocarbons in the soils around oil production wells was investigated, and their alteration of the microbiota was revealed.

Study on the Influence of Different Factors on Spontaneous Oil Recovery of Nanosurfactants in a Tight Reservoir.

The surface of a tight reservoir appears to be oil-wet or mixed-type wet upon soaking in crude oil for a long time, and the yield decreases rapidly after fracturing under the influence of capillary force. The oil sweep efficiency affected by many factors such as formation water dilution, salinity, crude oil type, temperature, and pressure can be enhanced by adding nanosurfactants into the fracturing fluid, so it is necessary to study the influence of different factors on the spontaneous imbibition replacement efficiency of nanosurfactants. In this study, the basic properties of nanosurfactants such as particle size, oil-water interfacial tension (IFT), and the wetting modification effect were tested, and the influence of surfactant type, concentration, temperature, and pressure on imbibition replacement efficiency was studied.

Association of handgrip strength with the prevalence of metabolic syndrome in US adults: the national health and nutrition examination survey.

Objective: Aimed to find the cut-off point of handgrip strength and it's association with MetS.

Results: The relative handgrip strength was negatively associated with the prevalence of MetS. Of note, the odds ratios (ORs) with 95% confidence intervals (CIs) across tertiles of relative handgrip strength were 1 (reference), 0.